US4160695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of glucose from cellulose-containing vegetable raw materials
Assignee: Sunopta Inc
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Filing: 1977-07-18
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Granted: 1979-07-10
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Expires: 1997-07-18
Abstract
Abstract A process for the production of glucose from cellulose containing raw material by steam treatment at a temperature from 160 DEG to 230 DEG C. for from 2 minutes to 4 hours followed by lixiviation with aqueous alkali and acid or enzymatic hydrolysis of fibrinous residue.
Inventors
- 👤 Hans-Hermann Dietrichs
- 👤 Michael Sinner
- 👤 Fritz Opderbek
- 👤 Karl-Heinz Brachthauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:53
CPC Classifications
C; C13; C13K; C13K13/00; C13K13/002; C13K1/00; C13K1/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
A process for the production of glucose from cellulose-containing vegetable raw material which can be disintegrated by steam pressure treatment and defibrination consisting essentially of the steps of (a) treating cellulose-containing vegetable raw material with saturated steam at temperatures of from about 160° to 230° C. for a period of from about 2 minutes to about 4 hours to disintegrate the raw material, (b) lixiviating the disintegrated raw material with an aqueous solution of alkali to leave a fibrinous residue, and (c) subjecting the fibrinous residue to acid or enzymatic hydrolysis under conditions to produce glucose.
Claim 2
Dependent Claim
96 words
A process for the production of glucose from cellulose-containing vegetable raw material which can be disintegrated by steam pressure treatment and defibrination consisting essentially of the steps of (a) treating cellulose-containing vegetable raw material with saturated steam at temperatures of from about 160° to 230° C. for a period of from about 2 minutes to about 4 hours to disintegrate the raw material, (b) lixiviating the disintegrated raw material with an aqueous solution of alkali to leave a fibrinous residue, and (c) subjecting the fibrinous residue to acid or enzymatic hydrolysis under conditions to produce glucose.
Claim 3
Dependent Claim
18 words
Process according to claim 1 wherein the lixiviation of the disintegrated raw material is conducted in several steps.
Claim 4
Dependent Claim
20 words
Process according to claim 2, wherein the lixiviation is carried out successively with water and with an aqueous alkali solution.
Claim 5
Dependent Claim
22 words
Process according to claim 3, wherein the alkaline lixiviation is carried out in a solution containing from 0.1 to 4 wt.% NaOH.
Claim 6
Dependent Claim
24 words
Process according to claim 1, wherein the fibrinous residue obtained after lixiviation of the disintegrated vegetable raw material is washed with water or neutralised.
Claim 7
Dependent Claim
25 words
The process according to claim 1 wherein the fibrinous residue obtained after lixiviation of the disintegrated vegetable raw material is washed with water and neutralized.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-09 | 1983-01-08 | 1983-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-09 | 1987-01-08 | 1987-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-09 | 1991-01-08 | 1991-07-10 | $7700.00 | Window Closed / Lapsed |