Claims:

1. A method for extraction of ginger oil, wherein the method comprises:
obtaining a ginger from a Satara variety of ginger;
washing the ginger with one or more of aqueous solution, wherein the aqueous solution is water;
crushing the ginger to obtain fibre material and juice, wherein the ginger is crushed using a pulveriser;
obtaining an extract based on addition of solvent to the fibre material in a reflux system at a standard temperature and standard pressure for a predefined time to obtain an extract; and
obtaining the ginger oil and a recovered solvent based on separating the solvent from the extract, wherein the solvent is separated from the extract based on performing a distillation process at a temperature of 60-70 0C for a predefined time.

2. The method as claimed in claim 1, wherein the solvent is hexane.

3. The method as claimed in claim 1, wherein the ginger oil comprises of bioactive compounds, and wherein the bioactive compounds are one or more of 6-gingerol, 8-gingerol, 10-gingerol, 6-shagol.

4. The method as claimed in claim 1, wherein the ginger oil comprises of 6-gingerol in the range of 40%-50% of the bioactive compounds.

5. The method as claimed in claim 1, wherein the ginger oil comprises of 97% of total gingerols of the bioactive compounds.

6. The method as claimed in claim 1, wherein the distillation process is performed for the predefined time of 6-7 hours.

7. The method as claimed in claim 1, wherein the ginger oil comprises less than 12 ppm levels of the solvent.

8. The method as claimed in claim 1, wherein the recovered solvent is in the range of 60-70% of the solvent.
, Description:FORM 2

THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

Title of invention:
METHOD FOR EXTRACTION OF GINGER OIL

Applicant:
VENKATESHWARA AROMATICS PRIVATE LIMITED
A company Incorporated in India
Having address:
Second floor, Renuka bldg, Nandadip society,
Anand Nagar, Pune – 411051, Maharashtra, India

The following specification particularly describes the invention and the manner in which it is to be performed.

PRIORITY INFORMATION
[001] This patent application does not claim priority from any application.

TECHNICAL FIELD
[002] The present subject matter described herein, in general, relates to a ginger oil, and in particularly a method for extraction of ginger oil.

BACKGROUND

[003] Generally, Ginger (Zingiber officinale) is used as a flavoring agent, and as a medicinal remedy. Ginger is one of the most widely used spices in the world. Ginger contains various phytochemicals, which are produced by plants through primary or secondary metabolism. The characteristic fragrance and flavor of ginger is a result from volatile oils that compose 1-3% of the weight of fresh ginger.
[004] Recovery of the phytochemicals found in the fresh ginger is dependent on the type of method used to extract the ginger oil. Method parameters are optimized in order to increase yield of the phytochemicals and to improve the quality of the ginger oil obtained.
[005] Ginger oil generally contains primarily consisting of bioactive compounds like zingerone, shogaols, and gingerols with [6]-gingerol (1-[4'-hydroxy-3'-methoxyphenyl]-5-hydroxy-3-decanone) as the major pungent compound. The phytochemical profile of the ginger oil varies from various varieties and ISO grades of ginger. Common methods to obtain the ginger oil is a process of solvent extraction, supercritical carbon di-oxide extraction process, and liquid-liquid microextraction.

SUMMARY
[006] Before the present method is described, it is to be understood that this application is limited to the particular method described. It is also to be understood that the terminology used in the description is for the purpose of describing the particular versions or embodiments only, and is not intended to limit the scope of the present application. This summary is provided to introduce concepts related to method for extraction of ginger oil and the concepts are further described below in the detailed description. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the claimed subject matter.
[007] In one implementation, a method for extraction of ginger oil is disclosed. The process comprises obtaining ginger from a Satara variety of ginger. Further, washing the ginger with one or more of aqueous solution. The process further comprises of crushing the ginger to obtain fibre material and juice. The ginger is crushed using a pulveriser. Furthermore, an extract is obtained based on addition of solvent to the fibre material in a reflux system at a standard temperature and standard pressure for a predefined time. The process further comprises obtaining the ginger oil and a recovered solvent based on separating the solvent from the extract. The solvent is separated from the extract based on performing a distillation process at a temperature of 60-70 0C for a predefined time.

DETAILED DESCRIPTION
[008] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words “washing”, “obtaining”, “crushing”, “drying”, and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items. It must also be noted that as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Although any method of extraction of ginger oil or equivalent to those described herein may be used in the practice, the exemplary method of extraction of ginger oil is now described. The disclosed a method for extraction of ginger oil are merely examples of the disclosure, which may be embodied in various forms.
[009] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments. However, one of ordinary skill in the art will readily recognize that the present disclosure for a method for extraction of ginger oil is not intended to be limited to the embodiments illustrated, but is to be accorded the widest scope consistent with the principles and features described herein.
[0010] The present description discloses a method for extraction of ginger oil. Ginger may be obtained from a Satara variety of ginger. Further, the ginger may be washed with one or more of aqueous solution. The ginger may be further crushed to obtain fibre material and juice. The ginger may be crushed using a pulveriser. An extract may be obtained based on addition of solvent to the fibre material in a reflux system at a standard temperature and standard pressure for a predefined time. The ginger oil and a recovered solvent may be obtained based on separating the solvent from the extract. The solvent may be separated from the extract based on performing a distillation process at a temperature of 60-70 0C for a predefined time.
[0011] In one aspect, the distillation process may be utilized for the separation of the solvent from the extract. Further, the distillation process may be utilized to obtain a pure form of ginger oil. The distillation process may be performed for a predefined time. The predefined time is preferably of 6-7 hours. The recovered solvent based on performing the distillation process obtained may be in the range of 60-70%.
[0012] The solvent used in the method for extraction of ginger oil is preferably hexane.
[0013] In one aspect, the ginger oil may contain bioactive compounds. The bioactive compounds obtained may be one or more of 6-gingerol, 8-gingerol, 10-gingerol, 6-shagol.
[0014] In one embodiment, the ginger oil preferably contains 6-gingerol in the range of 40-50% of the bioactive compounds. In another embodiment, the ginger oil comprises of 97% of the total gingerols of the bioactive compounds.
[0015] In one aspect, the distillation process may be carried out in a soxhlet type of extractor.
[0016] In another aspect, the method for extraction of ginger oil has a batch time of 6 hours to 8 hours.
[0017] In one embodiment, the shelf life of the ginger oil is in a range of 1 year to 2 years from extracting the ginger oil.
[0018] In one aspect, the ginger oil has less than 12 ppm levels of solvent.
[0019] In a preferred embodiment, the ginger oil extracted has a technical specification, as mentioned below in Table 1.
Table 1: Technical Specification
Description & Appearance Clear, Free-Flowing Light Amber Colored Liquid
Odour Characteristic Spicy Ginger Odour With A Sweet Base Note
Refractive Index At 200c 1.48838
Specific Gravity 0.93 -1.01
Soluble In Paraffin Insoluble
Soluble In Alcohol Insoluble
Soluble In Water Insoluble
Solubility In Glycerin Insoluble
Solubility In Propylene Glycol Insoluble

[0020] In a preferred embodiment, active ingredient analysis of the ginger oil contains the bioactive compounds in amount, as mentioned in Table 2. The active ingredient analysis is performed using Gas Chromatography technique.
Table 2: Active Ingredient Analysis of Ginger Oil
Parameters Result Unit
Total Gingerols 97.01

g/100 g
6-Gingerol 47.52
8-Gingerol 15.32
10-Gingerol 30.46
6-Shogaol 3.71

[0021] Exemplary embodiments discussed above may provide certain advantages. Though not required to practice aspects of the disclosure, these advantages may include those provided by the following features.
[0022] Some embodiments enable the ginger oil to be used as an essential oil, for application on skin and hair, and used in pharmaceuticals to treat various diseases, due to its high anti-oxidant properties and various health-promoting functions. The ginger oil is easy to use, cost-effective, and provides a higher phytochemical content in the ginger oil in comparison to other forms of ginger oil.
[0023] Some embodiments enable the ginger oil to be used as an essential oil and the method used for extraction of the ginger oil has a reduced batch time from 12 hours to a range of 6 hours to 8 hours.
[0024] Although embodiments of method for extraction of ginger oil has been described in language specific to steps/reactants, it is to be understood that the appended claims are necessarily limited to the specific method described. Further, the specific features and methods are disclosed as examples of embodiments of a method for extraction of ginger oil.