US4132595A
Expired / Lapsed
US
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Dextrose production with immobilized glucoamylase
Assignee: Unilever Bestfoods North America
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Filing: 1976-12-13
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Granted: 1979-01-02
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Expires: 1996-12-13
Abstract
Abstract A process for production of dextrose from starch wherein a starch hydrolysate having a high dextrose equivalent produced using soluble glucoamylase is treated solely with an immobilized glucoamylase enzyme to produce a dextrose product.
Inventors
- 👤 Ronald E. Hebeda
- 👤 Dennis J. Holik
- 👤 Harry W. Leach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:05
CPC Classifications
C; C13; C13K; C13K1/00; C13K1/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
110 words
A process for the production of dextrose from starch which comprises the steps of: (a) reacting starch with hydrolytic enzymes or acid to produce a low D.E. starch hydrolysate having a dextrose equivalent from about 2 to about 20; (b) treating the low D.E. starch hydrolysate with a soluble glucoamylase preparation to produce a starch hydrolysate having a dextrose equivalent from about 30 to about 85; (c) reacting the soluble glucoamylase-treated starch hydrolysate with an effective amount of an enzyme consisting of immobilized glucoamylase under conditions to produce a dextrose product having a dextrose content of at least about 93 percent dry weight basis; and (d) recovering said dextrose product.
Claim 2
Dependent Claim
110 words
A process for the production of dextrose from starch which comprises the steps of: (a) reacting starch with hydrolytic enzymes or acid to produce a low D.E. starch hydrolysate having a dextrose equivalent from about 2 to about 20; (b) treating the low D.E. starch hydrolysate with a soluble glucoamylase preparation to produce a starch hydrolysate having a dextrose equivalent from about 30 to about 85; (c) reacting the soluble glucoamylase-treated starch hydrolysate with an effective amount of an enzyme consisting of immobilized glucoamylase under conditions to produce a dextrose product having a dextrose content of at least about 93 percent dry weight basis; and (d) recovering said dextrose product.
Claim 3
Dependent Claim
22 words
The process of claim 1, wherein the soluble glucoamylase treated starch hydrolysate has a dextrose equivalent from about 45 to about 85.
Claim 4
Dependent Claim
15 words
The process of claim 1, wherein the immobilized glucoamylase is covalently bound to porous silica.
Claim 5
Dependent Claim
21 words
The process of claim 1, wherein the dextrose product has a dextrose content of at least 95 percent dry weight basis.
Claim 6
Dependent Claim
98 words
A process for producing dextrose from a low D.E. starch hydrolysate having a dextrose equivalence of about 2 to about 20 which comprises the steps of: (a) treating said starch hydrolysate with a soluble glucoamylase preparation to produce a starch hydrolysate product having a dextrose equivalent from about 30 to about 85; (b) reacting the soluble glucoamylase treated starch hydrolysate product with an effective amount of an enzyme consisting of immobilized glucoamylase under conditions to produce a dextrose product having a dextrose content of at least about 93 percent dry weight basis; and (c) recovering said dextrose product.
Claim 7
Dependent Claim
98 words
A process for producing dextrose from a low D.E. starch hydrolysate having a dextrose equivalence of about 2 to about 20 which comprises the steps of: (a) treating said starch hydrolysate with a soluble glucoamylase preparation to produce a starch hydrolysate product having a dextrose equivalent from about 30 to about 85; (b) reacting the soluble glucoamylase treated starch hydrolysate product with an effective amount of an enzyme consisting of immobilized glucoamylase under conditions to produce a dextrose product having a dextrose content of at least about 93 percent dry weight basis; and (c) recovering said dextrose product.
Claim 8
Dependent Claim
23 words
The process of claim 5, wherein the soluble glucoamylase treated starch hydrolysate product has a dextrose equivalent from about 45 to about 85.
Claim 9
Dependent Claim
15 words
The process of claim 5, wherein the immobilized glucoamylase is covalently bound to porous silica.
Claim 10
Dependent Claim
21 words
The process of claim 5, wherein the dextrose product has a dextrose content of at least 95 percent dry weight basis.
Claim 11
Dependent Claim
59 words
A process for the production of dextrose product having a dextrose content of at least about 93 percent dry basis weight comprising reacting a starch hydrolysate having a D.E. of about 30 to about 85, said hydrolysate being free of active alpha-amylase enzyme, with an effective amount of an enzyme consisting of immobilized glucoamylase to produce said dextrose product.
Claim 12
Dependent Claim
59 words
A process for the production of dextrose product having a dextrose content of at least about 93 percent dry basis weight comprising reacting a starch hydrolysate having a D.E. of about 30 to about 85, said hydrolysate being free of active alpha-amylase enzyme, with an effective amount of an enzyme consisting of immobilized glucoamylase to produce said dextrose product.
Claim 13
Dependent Claim
19 words
The process of claim 9, wherein the starch hydrolysate has a dextrose equivalent from about 45 to about 85.
Claim 14
Dependent Claim
15 words
The process of claim 9, wherein the immobilized glucoamylase is covalently bound to porous silica.
Claim 15
Dependent Claim
21 words
The process of claim 9, wherein the dextrose product has a dextrose content of at least 95 percent dry weight basis.
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) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |