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Process For Isolating Fermentable Sugars From The Acid Hydrolyzate Of A Material Containing Cellulose, Hemicellulose And Lignin
Abstract: The present invention provides a process for isolating fermentable sugars from the acid hydrolyzate of a material containing cellulose, hemicellulose and lignin, particularly a process which is simple, economical and commercially viable.
Notices, Deadlines & Correspondence
Patent Information
Applicants
PETIVA PRIVATE LIMITED
Inventors
1. Banibrata Pandey
Claims
1. A process for isolating fermentable sugars from the hydrolyzate obtained from the acid hydrolysis of a material containing cellulose, hemicellulose and lignin; wherein the process comprises: (a) neutralizing the hydrolyzate with an alkali and filtering the resultant mixture to recover lignin as a solid; (b) drying the filtrate of step (a) to obtain a residue comprising fermentable sugars and salts; (c) extracting fermentable sugars from the residue with C1-C6 alcohol or their mixtures; and (d) evaporating the alcohol to yield fermentable sugars.
2. The process as claimed in claim 1, wherein the alkali is selected from a group comprising alkaline hydroxides, alkaline salts, amines and combinations thereof.
3. The process as claimed in claim 1, wherein the alkali is alkaline hydroxide, preferably ammonium hydroxide.
4. The process as claimed in claim 1, wherein the alcohol is ethanol.
5. The process as claimed in claim 1, wherein the alcohol concentration is more than 70% v/v in water.
6. The process as claimed in claim 1, wherein the neutralization is carried out at ambient temperature or below.
7. The process as claimed in claim 1, wherein the neutralization is carried out at a temperature of about 0 ºC to 10 ºC.
8. The process as claimed in claim 1, wherein the sugar is selected from a group comprising glucose, xylose and arabinose.
Specification
We Claim:
1. A process for isolating fermentable sugars from the hydrolyzate obtained from the acid hydrolysis of a material containing cellulose, hemicellulose and lignin; wherein the process comprises:
(a) neutralizing the hydrolyzate with an alkali and filtering the resultant mixture to recover lignin as a solid;
(b) drying the filtrate of step (a) to obtain a residue comprising fermentable sugars and salts;
(c) extracting fermentable sugars from the residue with C1-C6 alcohol or their mixtures; and
(d) evaporating the alcohol to yield fermentable sugars.
2. The process as claimed in claim 1, wherein the alkali is selected from a group comprising alkaline hydroxides, alkaline salts, amines and combinations thereof.
3. The process as claimed in claim 1, wherein the alkali is alkaline hydroxide, preferably ammonium hydroxide.
4. The process as claimed in claim 1, wherein the alcohol is ethanol.
5. The process as claimed in claim 1, wherein the alcohol concentration is more than 70% v/v in water.
6. The process as claimed in claim 1, wherein the neutralization is carried out at ambient temperature or below.
7. The process as claimed in claim 1, wherein the neutralization is carried out at a temperature of about 0 ºC to 10 ºC.
8. The process as claimed in claim 1, wherein the sugar is selected from a group comprising glucose, xylose and arabinose.
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | SPEC_2.pdf | 2015-06-24 |
| 2 | Form 5.pdf | 2015-06-24 |
| 3 | Form 3.pdf | 2015-06-24 |
| 4 | Drawings.pdf | 2015-06-24 |
| 5 | Drawing [10-06-2016(online)].pdf | 2016-06-10 |
| 6 | Description(Complete) [10-06-2016(online)].pdf | 2016-06-10 |
| 7 | REQUEST FOR CERTIFIED COPY [22-06-2016(online)].pdf | 2016-06-22 |
| 8 | REQUEST FOR CERTIFIED COPY [24-06-2016(online)].pdf | 2016-06-24 |
| 9 | Request For Certified Copy-Online.pdf_1.pdf | 2016-07-12 |
| 10 | Request For Certified Copy-Online.pdf | 2016-07-12 |
| 11 | Form 13 [30-08-2016(online)].pdf_24.pdf | 2016-08-30 |
| 12 | Form 13 [30-08-2016(online)].pdf | 2016-08-30 |
| 13 | Form 13 [01-09-2016(online)].pdf | 2016-09-01 |
| 14 | Form-2(Online).pdf | 2016-09-30 |
| 15 | Form 3 [04-05-2017(online)].pdf | 2017-05-04 |
| 16 | Form 18 [04-05-2017(online)].pdf | 2017-05-04 |
| 17 | 2925-CHE-2015-FER.pdf | 2019-02-28 |
| 18 | 2925-CHE-2015-Proof of Right (MANDATORY) [27-08-2019(online)].pdf | 2019-08-27 |
| 19 | 2925-CHE-2015-PETITION UNDER RULE 137 [27-08-2019(online)].pdf | 2019-08-27 |
| 20 | 2925-CHE-2015-Information under section 8(2) (MANDATORY) [27-08-2019(online)].pdf | 2019-08-27 |
| 21 | 2925-CHE-2015-FORM-26 [27-08-2019(online)].pdf | 2019-08-27 |
| 22 | 2925-CHE-2015-FORM 3 [27-08-2019(online)].pdf | 2019-08-27 |
| 23 | 2925-CHE-2015-FER_SER_REPLY [27-08-2019(online)].pdf | 2019-08-27 |
| 24 | 2925-CHE-2015-COMPLETE SPECIFICATION [27-08-2019(online)].pdf | 2019-08-27 |
| 25 | 2925-CHE-2015-CLAIMS [27-08-2019(online)].pdf | 2019-08-27 |
| 26 | 2925-CHE-2015-ABSTRACT [27-08-2019(online)].pdf | 2019-08-27 |
| 27 | Correspondence by Agent_Power of Attorney_30-08-2019.pdf | 2019-08-30 |
| 28 | Correspondence by Agent_Authorization_06-09-2019.pdf | 2019-09-06 |
| 29 | 2925-CHE-2015-HearingNoticeLetter-(DateOfHearing-18-11-2019).pdf | 2019-11-05 |
| 30 | 2925-CHE-2015-Written submissions and relevant documents (MANDATORY) [18-11-2019(online)].pdf | 2019-11-18 |
| 31 | 2925-CHE-2015_Marked up Claims_Granted 326343_29-11-2019.pdf | 2019-11-29 |
| 32 | 2925-CHE-2015_Drawings_Granted 326343_29-11-2019.pdf | 2019-11-29 |
| 33 | 2925-CHE-2015_Description_Granted 326343_29-11-2019.pdf | 2019-11-29 |
| 34 | 2925-CHE-2015_Claims_Granted 326343_29-11-2019.pdf | 2019-11-29 |
| 35 | 2925-CHE-2015_Abstract_Granted 326343_29-11-2019.pdf | 2019-11-29 |
| 36 | 2925-CHE-2015-PatentCertificate29-11-2019.pdf | 2019-11-29 |
| 37 | 2925-CHE-2015-IntimationOfGrant29-11-2019.pdf | 2019-11-29 |
| 38 | 2925-CHE-2015-FORM 4 [28-08-2020(online)].pdf | 2020-08-28 |
Search Strategy
| 1 | SS2925CHE2015_28-02-2019.pdf |