Claims:We claim:
1. An improved shaped catalyst composite comprising
a treated zeolite; and
a compositing material,
wherein the said treated zeolite is obtained by treating the parent zeolite with a solution containing alkali and optionally at least one nitrogenous organic compound under conditions sufficient to effect the treatment.
2. The catalyst composite as claimed in claim 1, wherein the said zeolite is MCM-22 of MFI family.
3. The catalyst composite as claimed in any of the preceding claims, wherein the said compositing material comprises a group of compounds consisting of oxides of elements from group III A and group IVA, or a combination thereof.
4. The catalyst composite as claimed in any of the preceding claims, wherein the said compositing material is selected from a group comprising aluminium oxide, gallium oxide, complex oxides of combination of aluminium and phosphorous, aluminium phosphate, aluminium phosphate hydrogel.
5. An improved shaped catalyst composite comprising Meso-MCM-22 and alumina.
6. The catalyst composite as claimed in any of the preceding claims, wherein the said alkali is selected from a group comprising sodium hydroxide, lithium hydroxide, calcium hydroxide, magnesium hydroxide, cesium hydroxide or potassium hydroxides and combinations thereof.
7. The catalyst composite as claimed in any of the preceding claims, wherein the said nitrogenous organic compound is selected from a group comprising primary amine, secondary amine, tertiary amine, diamine, quaternary ammonium salts and combinations thereof.
8. The catalyst composite as claimed in any of the preceding claims, wherein the said nitrogenous organic compound is selected from a group comprising benzylamine, aniline, pyridine, piperidine, pyrrolidine, hexamethyleneimine, cyclohexyl amine, adamantyl ammonium hydroxide and diquaternary ammonium salts such as N,N?-bisdiisopropylpentanediyldiammonium bromide (1,5-diquarternary ammonium salt), preferably hexamethyleneimine, piperidine and N,N?-bisdiisopropylpentanediyldiammonium bromide.
9. The catalyst composite as claimed in any of the preceding claims, wherein the parent zeolite is treated either with alkali solution having strength ranging from about 0.1 to 10 molar or with organic compound solution having strength ranging from about 0.1 to 1.0 molar.
10. The catalyst composite as claimed in any of the preceding claims, wherein the parent zeolite is treated with liquid to solid ratio ranging from about 10 to 100.
11. The catalyst composite as claimed in any of the preceding claims, wherein the parent zeolite is treated with at least one of solution of organic compound or alkali, at temperature ranging from about 100 °C to 200 °C, pressure ranging from about 2 barg to 20 barg, and for a time period ranging from about 1 hour to 24 hours.
12. The catalyst composite as claimed in any of the preceding claims, wherein the said catalyst composite comprised the first material to the second material in weight ratio proportion of 95:5 to 5:95.
13. The catalyst composite as claimed in any of the preceding claims, wherein the said First material is zeolite MCM-22 and second material is alumina.
14. The improved shaped catalyst composite as claimed in claim 5, wherein Meso-MCM-22 is prepared by contacting MCM-22 with a solution containing alkali and optionally at least one nitrogenous organic compound under conditions sufficient to effect the treatment.
15. The catalyst composite as claimed in any of the preceding claims, wherein the composite of treated zeolite and compositing material is in the shape selected from spherical, cylindrical, tri-lobe, tetra-lobe, star, ring, tablets, pellets, honeycomb.
16. The catalyst composite as claimed in any of the preceding claims, wherein the diameter of the shaped bodies ranging from about 0.2 millimetres to 5 millimetres and the length of the shaped bodies ranging from about 0.2 millimetres to 20 millimetres.
17. A process for upgrading olefin containing hydrocarbon stream to produce substantially olefin free hydrocarbon stream, by contacting the said olefin containing hydrocarbon stream with the said improved shaped catalyst composite.
18. The process as claimed in claim 16, wherein said process is carried out at temperature ranging from about 0? to 500 ?, pressure ranging from about 0.01 atmosphere to 300 atmospheres; and for a time period ranging from about 0.001 hour to 100 hours.
19. The process as claimed in claim 16, wherein said process employs feed stream containing olefins about 0.5 wt.% or about 5000 ppm or more than 300 ppm; product stream contains olefins at-least less than 50%, preferably less than 45% of the olefin content in the hydrocarbon stream.
20. The process as claimed in claim 16, wherein said process generates total benzene and toluene less than 200 ppm.

Dated this 09th day of December 2019
Signature:
Name: Durgesh Mukharya
To: Of K&S Partners, Bangalore
The Controller of Patents Agent for the Applicant
The Patent Office, at Mumbai IN/PA-1541
, Description:TECHNICAL FIELD
[001]. The instant disclosure is in the field of chemical sciences, more particularly to synthetic chemistry and material science. The present disclosure generally relates to an improved shaped catalyst composite; and a method for upgrading hydrocarbon stream through removal of olefin impurities present therein and producing a hydrocarbon stream substantially free form olefinic contaminants using the said catalyst composite. In particular, the present invention relates an improved shaped catalyst composite comprising of a treated zeolite selected from MFI and MWW family of zeolites, and a compositing material selected from group of compounds consisting of oxides of elements from group III A and group IV A, or a combination thereof. More particularly, the present invention relates to a mesoporous MCM-22 composite catalyst useful for reducing olefin content from a commercial C8+ aromatic stream.

BACKGROUND OF THE DISCLOSURE
[002]. Development of new composition of materials for application as catalyst and hydrocarbon conversion process in the area of refining and petrochemicals is of commercial interest. Substitution of existing catalyst and process with newer environment friendly material with higher efficacy and service life, and enhanced process reliability and smoother operation is always sought for.
[003]. For production of para-xylene by adsorption process, the C8 aromatics feed stream must be free from olefinic impurities, to save-guard the high-priced adsorbent. Hence these olefinic impurities are removed in up-streams of adsorption unit where in specialty clay is used to serve the purpose. But the problem here is the short life of clay. Furthermore, these clay materials cannot be regenerated. This results frequent change-over, of resulting in generation of huge volume of solid waste.
[004]. Therefore, there is a need to identify a method for olefin removal from C8 aromatic stream using an efficient catalyst replacing the clay material which has the above-mentioned drawbacks. The present disclosure tried to address said need to (i) bring down the frequency of change over, and (ii) avoid generation of solid waste, (iii) improve process operation and (iv) enhance reliability.

SUMMARY OF THE DISCLOSURE
[005]. The present disclosure provides an improved shaped catalyst composite which has a high efficacy for olefin removal, longer on-stream life and regenerability properties.
[006]. The present disclosure relates to an improved shaped catalyst composite comprising
a treated zeolite; and
a compositing material,
wherein the said treated zeolite is obtained by treating the parent zeolite with a solution containing alkali and optionally at least one nitrogenous organic compound under conditions sufficient to effect the treatment.
[007]. In an embodiment, the disclosure relates to an improved shaped catalyst composite comprising Meso-MCM-22 and alumina.
[008]. The present disclosure also provides a process for upgrading olefin containing hydrocarbon stream to produce substantially olefin free hydrocarbon stream, by contacting the said olefin containing hydrocarbon stream with the said improved shaped catalyst composite.
[009]. In an embodiment, the present process is carried out at temperature ranging from about 0? to 500 ?, pressure ranging from about 0.01 atmosphere to 300 atmospheres; and for a time period ranging from about 0.001 hour to 100 hours.

STATMENT OF THE DISCLOSURE
[0010]. The present disclosure provides an improved shaped catalyst composite comprising
a treated zeolite; and
a compositing material,
wherein the said treated zeolite is obtained by treating the parent zeolite with a solution containing alkali and optionally at least one nitrogenous organic compound under conditions sufficient to effect the treatment.
[0011]. The present disclosure also provides a process for upgrading olefin containing hydrocarbon stream to produce substantially olefin free hydrocarbon stream, by contacting the said olefin containing hydrocarbon stream with the said improved shaped catalyst composite.
DESCRIPTION OF THE DISCLOSURE
[0012]. The foregoing has broadly outlined the features and technical advantages of the present disclosure in order that the detailed description of the disclosure that follows may be better understood. Additional features and advantages of the disclosure will be described hereinafter which form the subject of the description of the disclosure. It should also be realized by those skilled in the art that such equivalent methods do not depart from the scope of the disclosure. Further, for the purposes of the following detailed description, it is to be understood that the invention may assume various alternative variations and step sequences, except where expressly specified to the contrary. Moreover, other than in any operating examples, or where otherwise indicated, all numbers expressing, for example, quantities of ingredients used in the specification are to be understood as being modified in all instances by the term "about". It is noted that, unless otherwise stated, all percentages given in this specification and appended claims refer to percentages by weight of the total composition.
[0013]. Thus, before describing the present invention in detail, it is to be understood that this invention is not limited to particularly exemplified systems or process parameters that may of course, vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments of the invention only and is not intended to limit the scope of the invention in any manner.
[0014]. While the disclosure is susceptible to various modifications and alternative forms, specific embodiment thereof has been shown by way of example. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the spirit and the scope of the disclosure. Thus, the use of examples anywhere in this specification including examples of any terms discussed herein is illustrative only, and in no way limits the scope and meaning of the invention or of any exemplified term. Likewise, the invention is not limited to various embodiments given in this specification.
[0015]. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In the case of conflict, the present document, including definitions will control.
[0016]. It must be noted that, as used in this specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the content clearly dictates otherwise. Thus, for example, reference to a "solvent" may include two or more such solvents.
[0017]. The terms "preferred" and "preferably" refer to embodiments of the invention that may afford certain benefits, under certain circumstances. However, other embodiments may also be preferred, under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful and is not intended to exclude other embodiments from the scope of the invention.
[0018]. As used herein, the terms "comprising" "including," "having," "containing," "involving," and the like are to be understood to be open-ended, i.e., to mean including but not limited to. Further, the terms “comprises”, “comprising”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a method that comprises a list of acts does not include only those acts but may include other acts not expressly listed or inherent to such method. In other words, one or more acts in a method proceeded by “comprises… a” does not, without more constraints, preclude the existence of other acts or additional acts in the method.
[0019]. With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.
[0020]. Any discussion of documents, acts, materials, devices, articles and the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.
[0021]. A detailed description for the purpose of illustrating representative embodiments of the present invention is given below, but these embodiments should not be construed as limiting the present invention.
[0022]. Unless otherwise indicated, all numbers expressing feature sizes, amounts, and physical properties used in the specification and claims are to be understood as being modified in all instances by the term "about." Accordingly, unless indicated to the contrary, the numerical parameters set forth in the foregoing specification and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by those skilled in the art utilizing the teachings disclosed herein. The use of numerical ranges by endpoints includes all numbers within that range (e.g. 1 to 5 includes 1, 1.5, 2, 2.80, 3, 3.75, 4, and 5) and any integer number or decimal number within that range.
[0023]. The present disclosure provides an improved shaped catalyst composite which has a high efficacy for olefin removal, longer on-stream life and regenerability properties.
[0024]. The present disclosure provides an improved shaped catalyst composite comprising
a treated zeolite; and
a compositing material,
wherein the said treated zeolite is obtained by treating the parent zeolite with a solution containing alkali and optionally at least one nitrogenous organic compound under conditions sufficient to effect the treatment.
[0025]. In an embodiment of the present disclosure, the said zeolite is MCM-22 type of MWW family.
[0026]. Zeolites are crystalline porous materials possess the micropores of molecular dimensions and exhibit outstanding shape selectivity. However, the mass transfer limitation of reactants and products has been demonstrated to playing an important role in the catalytic efficiency. To overcome the diffusion limitation and increase the accessibility of catalytic active sites to molecules, the present invention provides the aspect related to introducing mesopores into these zeolites which will be much effective. In the present disclosure, mesoporous MCM-22 zeolites through a combination of protective desilication and organic amine-assisted reversible structural change, which overcomes shortcomings such as structure collapse that encountered in conventional treatment with NaOH only. The organic amines, originally serving as structure-directing agents for MWW zeolite crystallization, can enter intracrystal micropores to induce 3D to 2D structural conversion. The resulting materials with well characterized physicochemical properties and structural features are promising catalysts for the removal of olefin from BTX streams.
[0027]. In another embodiment of the present disclosure, the said compositing material comprises a group of compounds consisting of oxides of elements from group III A and group IV A, or a combination thereof.
[0028]. The present disclosure provides an improved shaped catalyst composite comprising a treated zeolite selected from MFI and MWW family of zeolites, and a compositing material selected from group of compounds consisting of oxides of elements from group III A and group IV A, or a combination thereof.
[0029]. In an embodiment of the present disclosure, the said compositing material is selected from a group comprising aluminium oxide, gallium oxide, complex oxides of combination of aluminium and phosphorous, aluminium phosphate, aluminium phosphate hydrogel.
[0030]. The present disclosure relates to an improved shaped catalyst composite comprising Meso-MCM-22 and alumina.
[0031]. In another embodiment of the present disclosure, the said alkali is selected from a group comprising sodium hydroxide, lithium hydroxide, calcium hydroxide, magnesium hydroxide, cesium hydroxide or potassium hydroxides and combinations thereof.
[0032]. In yet another embodiment of the present disclosure, the said nitrogenous organic compound is selected from a group comprising primary amine, secondary amine, tertiary amine, diamine, quaternary ammonium salts and combinations thereof.
[0033]. In still another embodiment of the present disclosure, the said nitrogenous organic compound is selected from a group comprising benzylamine, aniline, pyridine, piperidine, pyrrolidine, hexamethyleneimine, cyclohexyl amine, adamantyl ammonium hydroxide and diquaternary ammonium salts such as N,N?-bisdiisopropylpentanediyldiammonium bromide (1,5-diquarternary ammonium salt), preferably hexamethyleneimine, piperidine, N,N?-bisdiisopropylpentanediyldiammonium bromide and combinations thereof.
[0034]. In an embodiment of the present disclosure, the parent zeolite is treated either with alkali solution having strength ranging from about 0.1 to 10 molar or with organic compound solution having strength ranging from about 0.1 to 1.0 molar.
[0035]. In another embodiment of the present disclosure, the parent zeolite is treated with liquid to solid ratio ranging from about 10 to 100.
[0036]. In yet another embodiment of the present disclosure, the parent zeolite is treated with at least one of solution of organic compound or alkali, at temperature ranging from about 100 °C to 200 °C, pressure ranging from about 2 barg to 20 barg, and for a time period ranging from about 1 hour to 24 hours.
[0037]. In still another embodiment of the present disclosure, the said catalyst composite comprised the first material to the second material in weight ratio proportion of 95:5 to 5:95.
[0038]. In still another embodiment of the present disclosure, the First material is Zeolite MCM-22 and second material is Alumina as a binder. Binders are used to increase the mechanical strength of zeolite shaped bodies.
[0039]. In still another embodiment of the present disclosure, the Alumina is a binder. Binders are used to increase the mechanical strength of zeolite shaped bodies.
[0040]. In still another embodiment of the present disclosure, the composite of treated zeolite and compositing material is in the shape selected from spherical, cylindrical, tri-lobe, tetra-lobe, star, ring, tablets, pellets, honeycomb.
[0041]. In still another embodiment of the present disclosure, the diameter of the shaped bodies ranging from about 0.2 millimetres to 5 millimetres and the length of the shaped bodies ranging from about 0.2 millimetres to 20 millimetres.
[0042]. In an embodiment of the present disclosure, the Meso-MCM-22 is prepared by contacting MCM-22 with a solution containing alkali and optionally at least one nitrogenous organic compound under conditions sufficient to effect the treatment.
[0043]. The diffusion transport is expected to be improved if the internal mesopores are introduced into zeolite MCM-22, which would reduce the diffusion distance and improving the accessibility of bulky molecules to the active sites within supercages. In the present application, synthesized mesoporous MCM-22 composite is tested for the removal of olefinic impurities from BTX streams. In the process of para-xylene production in an aromatics complex, the post-reforming streams are subjected to benzene and toluene recovery. The C8+ aromatics stream, containing mixture of xylenes (para-, meta- and ortho-) and the heavy aromatics (C9 and highers) remains contaminated with high boiling point olefins, and are needed to be removed before the stream is sent for para-xylene recovery by adsorption process. This removal of olefin contaminants are essential feature in aromatic complexes for para-xylene production to safe guard the adsorbent molecular sieves, since olefins are poison to adsorbents. At present special grade of clay is employed to adsorb these olefins, but the disadvantages are very short life, which calls for recurrent change-over of the spent clay with fresh ones thus generating enormous amount of solid waste.
[0044]. In the present invention, efficiency of mesoporous MCM-22 has been found to be significantly enhanced as compared to that of conventional MCM-22 for removal of olefins through catalytic alkylation of aromatics substrates present in C8 aromatic cut (from post reforming streams) by the olefins which are also present in the said stream, resulting in an substantially olefin free C8 aromatic stream. If the disclosed invention is implemented, it would be possible to replace the currently employed short-lived, non-regenerable clays in the aromatic complexes, with these new materials, with the benefits of long service life, avoiding frequent clay replacement and generation of huge solid waste. Apart from this the present invention relate with the synthesis of more efficient mesoporous MCM-22 zeolite as compared to the conventional MCM-22 zeolite synthesized. These new materials also have added advantages of being regenerable and are can be used repeatedly after due removal of carbonaceous materials deposited during the process service.
[0045]. The present disclosure also relates to a process for upgrading olefin containing hydrocarbon stream to produce substantially olefin free hydrocarbon stream, by contacting the said olefin containing hydrocarbon stream with the said improved shaped catalyst composite.
[0046]. In an embodiment of the present disclosure, the process is carried out at temperature ranging from about 0? to 500 ?, pressure ranging from about 0.01 atmosphere to 300 atmospheres; and for a time period ranging from about 0.001 hour to 100 hours.
[0047]. In another embodiment of the present disclosure, the process employs feed stream containing olefins more than 300 ppm.
[0048]. In yet another embodiment of the present disclosure, the process employs feed stream containing olefins about 0.5 wt.% or about 5000 ppm.
[0049]. In still another embodiment of the present disclosure, the product stream contains olefins at-least less than 50%, preferably less than 45% of the olefin content in the hydrocarbon stream.
[0050]. In still another embodiment of the present disclosure, the process generates total benzene and toluene less than 200 ppm.
[0051]. Additional embodiments and features of the present disclosure will be apparent to one of ordinary skill in art based upon description provided herein. The embodiments herein provide various features and advantageous details thereof in the description. Descriptions of well-known/conventional methods/steps and techniques are omitted so as to not unnecessarily obscure the embodiments herein. Further, the disclosure herein provides for examples illustrating the above described embodiments, and in order to illustrate the embodiments of the present disclosure certain aspects have been employed. The examples used herein for such illustration are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the following examples should not be construed as limiting the scope of the embodiments herein.

EXAMPLES
[0052]. Example 1: Synthesis of MCM-22.
To a vigorous stirred mixture containing 230 g water (H2O), 2.0 g sodium hydroxide (NaOH), 5.3 g sodium aluminate (NaAlO2), and 53 g precipitated silica (97 % pure), was slowly added 17 g hexamethylene imine (HMI) to obtain a first mixture having pH 11.8. The first mixture was further stirred continuously at room temperature for 2 hours to achieve a homogeneous hydrogel having the molar composition: 0.85 SiO2:0.028 Al2O3:0.0.63 Na2O:12.821 H2O: 0.171 SDA
The hydrogel was transferred into an autoclave, wherein the hydrogel was subjected to hydrothermal treatment at 170 °C under stirring for 24 h. The formed crystalline product was separated and washed by centrifugation, followed oven drying in air at 120 °C for overnight. As-made MCM-22 zeolite was calcined in air at 550 C for 6 h to remove organic template, HMI. XRD analysis of the as-made sample and the calcined sample showed pure phase of MCM-22 zeolite.

[0053]. Example 2. Synthesis of Meso-MCM-22 by treating MCM-22 with alkali
In a typical treatment of zeolite with NaOH solution, 10 g of calcined MCM-22 zeolite was mixed with 500 ml of 0.1 M NaOH solution and stirred vigorously for 30 min. This mixture was charged in Teflon lined autoclave and subjected to hydrothermal treatment at 170 °C for 2h. The sample was collected by filtration; washed with deionized water repeatedly until the pH value reached ~7; and, finally, dried at 120 °C overnight. A subsequent calcination was carried out on the alkaline-treated samples in air at 550 °C for 6 h to remove the organic species occluded. The samples thus prepared are denoted as mesoporous MCM-22.

[0054]. Example 3. Synthesis of Meso-MCM-22 by treating MCM-22 with alkali and Hexamethylene imine
In a typical synthesis of mesoporous MCM-22, 10 g of calcined MCM-22 was mixed with 500 ml 0.1 N NaOH solution wherein solid-to-liquid weight ratio of 1:50. 15.6 g of HMI was added to the above mixture wherein the added organic amine amount corresponds to a 1.0 molar ratio relative to the SiO2 in zeolite. This mixture is stirred vigorously for 30 min charged in teflon lined autoclave and subjected to hydrothermal treatment at 170 °C for 2h. The sample was collected by filtration; washed with deionized water repeatedly until the pH value reached ~7; and, finally, dried at 120 C overnight. A subsequent calcination was carried out on the alkaline-treated samples in air at 550 C for 6 h to remove the organic species occluded. The samples thus prepared are denoted as mesoporous MCM-22.

[0055]. Example 4. Synthesis of Meso-MCM-22 by treating MCM-22 with alkali and piperidine
In a typical synthesis of mesoporous MCM-22, 10 g of calcined MCM-22 was mixed with 500 ml 0.1 N NaOH solution wherein solid-to-liquid weight ratio of 1:50. 15.6 g of piperidine was added to the above mixture wherein the added organic amine amount corresponds to a 1.0 molar ratio relative to the SiO2 in zeolite. This mixture is stirred vigorously for 30 min charged in Teflon lined autoclave and subjected to hydrothermal treatment at 170 °C for 2h. The sample was collected by filtration; washed with deionized water repeatedly until the pH value reached ~7; and, finally, dried at 120 °C overnight. A subsequent calcination was carried out on the alkaline-treated samples in air at 550 for 6 h to remove the organic species occluded. The samples thus prepared are denoted as meso-MCM-22.

[0056]. Example 5. Synthesis of Meso-MCM-22 by treating MCM-22 with alkali and diquaternary ammonium salt
In a typical synthesis of mesoporous MCM-22, 10 g of calcined MCM-22 was mixed with 500 ml 0.1 N NaOH solution wherein solid-to-liquid weight ratio of 1:50. 68 g of N,N?-bisdiisopropylpentanediyldiammonium (1,5-diquarternary ammonium salt) was added to the above mixture wherein the added organic amine amount corresponds to a 1.0 molar ratio relative to the SiO2 in zeolite. This mixture is stirred vigorously for 30 min charged in teflon lined autoclave and subjected to hydrothermal treatment at 170 °C for 2h. The sample was collected by filtration; washed with deionized water repeatedly until the pH value reached ~7; and, finally, dried at 120 °C overnight. A subsequent calcination was carried out on the alkaline-treated samples in air at 550 °C for 6 h to remove the organic species occluded. The samples thus prepared are denoted as mesoporous MCM-22.

[0057]. Example 6-10: Shaping of catalyst powders into extrudates
The following examples provides preparation of the catalysts in shaped extrudates form:
Crystalline MWW zeolite powders from example 1 to 5, were shaped in the form of cylindrical extrudates using psuedobohemite alumina as binder and was converted to active proton form. The composition and properties of the extrudates are described in Table 1.
Table 1: Shaping of zeolite composite
Examples 6 7 8 9 10
Zeolite from example 1 2 3 4 5
Zeolite:Binder w/w 70:30 70:30 70:30 70:30 70:30

[0058]. Examples 11-15:
Performance of catalyst composites prepared in examples 6 to10
Catalytic performance of the samples were evaluated for reduction of olefin content from a commercial C8+ aromatic stream. Composition of the Deheptanizer bottom hydrocarbons, as employed for the olefin removal experiments is shown below in Table 2.
Table 2: Composition of Deheptanizer Column Bottom

Component Wt.%
Non-aromatics 1.3
Toluene 1.56
Ethyl benzene 8.31
Xylenes 44.51
C9Aromatics 36.23
C10A + Heavy Aromatics 8.09

Catalytic performance of the samples was evaluated for reduction of olefin content from a commercial C8+ aromatic stream.

5 g of extrudates were added to 35 g of commercial deheptanizer column bottom hydrocarbon stream in a stainless-steel bomb of 70 ml capacity. The reactor was purged with nitrogen to remove air and was closed. The bomb reactor was heated at predetermined temperature and duration. After this, the reactor was cooled to ambient conditions. The hydrocarbon liquid was separated from the solid catalyst and was examined for level of olefinic impurity. Olefin concentration of the feed and product samples were determined as Bromine Index of the sample following standard test method ASTM D-1491. The results are presented in Table 3. Example 12 to 15 are inventive while example 11 is comparative.

Table 3. Performance of comparative and inventive compositions of MWW zeolite
Example No Catalyst Details from Reaction Conditions Results % BI Reduction (Olefin Conv.)
Temp., °C Time, h Feed BI Prod. BI
Example 11 Example 6 Comparative 180 3 602 359 40
Example 12 Example 7 Inventive 180 3 602 312 48
Example 13 Example 8 Inventive 180 3 602 260 57
Example 14 Example 9 Inventive 180 3 602 315 48
Example 15 Example 10 Inventive 180 3 602 269 55

Clearly, the composition of MWW zeolite of present invention has significantly higher performance towards olefin conversion and thus for removal of olefins from the Deheptanizer Column Bottom stream (C8+ aromatics stream)

ADVANTAGES
[0059]. The present disclosure provides Mesoporous MCM-22 zeolite is synthesized by treating MCM-22 with an alkali solution through the protective effect of organic amines such as PI, HMI and 1, 5 di-quaternary ammonium salts. Accordingly, the present disclosure provides advantages including but not limiting to the following:
a. This method introduces mesopores into the MCM-22 crystals thus showing superior performance than that of conventional MCM-22 for removal of olefins from C8+ aromatic stream
b. could replace conventional clay material with higher stability and longer life.
c. helps in reducing the frequency of change-over for loading the material.
d. unlike clay, the spent material is regenerable, and this avoids solid waste generation.

[0060]. Additional embodiments and features of the present disclosure will be apparent to one of ordinary skill in art based on the description provided herein. The embodiments herein provide various features and advantageous details thereof in the description. Descriptions of well-known/conventional methods and techniques are omitted so as to not unnecessarily obscure the embodiments herein.
[0061]. The foregoing description of the specific embodiments fully reveals the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments in this disclosure have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
[0062]. While considerable emphasis has been placed herein on the particular features of this disclosure, it will be appreciated that various modifications can be made, and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other modifications in the nature of the disclosure or the preferred embodiments will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation.