US3852496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of whey with immobilized lactase and glucose isomerase
Assignee: Corning Glass Works
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Filing: 1973-09-04
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Granted: 1974-12-03
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Expires: 1993-09-04
Abstract
Abstract Whey or an ultrafiltrate of whey is treated to produce useful sweeteners by a method involving reacting whey with immobilized lactase to hydrolyze lactose to glucose and galactose, removing calcium ions from the whey, adjusting the pH of the whey to above 7 and reacting the whey with immobilized glucose isomerase to isomerize glucose to fructose.
Inventors
- 👤 H Weetall
- 👤 S Yaverbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:23
CPC Classifications
C; C13; C13K; C13K11/00; A; A23; A23C; A23C21/00; A23C21/02; A23C21/023; A23C9/00; A23C9/14; A23C9/142; A23C9/1425; A23L; A23L27/00; A23L27/30; A23L27/33
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
A METHOD OF TREATING A SOLUTION OF WHEY CONTAINING LACTOSE TO PRODUCE USEFUL SWEETENERS WHICH COMPRISES THE STEPS OF REACTING THE SOLUTION WITH A COMPOSITE COMPRISING BETAGALCTOSIDASE COVALENTLY BONDED TO A HIGH SUFFACE AREA, POROUS GLASS MATERIAL THROUGH AN INTERMEDIATE SILANE COUPLING AGENT TO HYDROLYZE A PORTION OF THTHE LACTOSE TO GLUCOSE AND GALACTOSE; REMOVING THE MAJORITY OF THE CALCIUM IONS FROM THE SOLUTION; ADJUSTING THE PH OF THE SOLUTION ABOVE 7.0; AND THEN REACTING THE SOLUTION WITH A COMPOSITE COMPRISING GLUCOSE ISOMERASE COVALENTLY BONDED TO A HIGH SURFACE AREA, POROUS GLASS MATERIAL THROUGH AN INTERMEDIATE SILANE COUPLING AGENT TO ISOMERIZE A PORTION OF THE GLUCOSE TO FRUCTOSE.
Claim 2
Independent Claim
108 words
A METHOD OF TREATING A SOLUTION OF WHEY CONTAINING LACTOSE TO PRODUCE USEFUL SWEETENERS WHICH COMPRISES THE STEPS OF REACTING THE SOLUTION WITH A COMPOSITE COMPRISING BETAGALCTOSIDASE COVALENTLY BONDED TO A HIGH SUFFACE AREA, POROUS GLASS MATERIAL THROUGH AN INTERMEDIATE SILANE COUPLING AGENT TO HYDROLYZE A PORTION OF THTHE LACTOSE TO GLUCOSE AND GALACTOSE; REMOVING THE MAJORITY OF THE CALCIUM IONS FROM THE SOLUTION; ADJUSTING THE PH OF THE SOLUTION ABOVE 7.0; AND THEN REACTING THE SOLUTION WITH A COMPOSITE COMPRISING GLUCOSE ISOMERASE COVALENTLY BONDED TO A HIGH SURFACE AREA, POROUS GLASS MATERIAL THROUGH AN INTERMEDIATE SILANE COUPLING AGENT TO ISOMERIZE A PORTION OF THE GLUCOSE TO FRUCTOSE.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein, prior to reaction with the first composite, the whey solution is subjected to an ultrafiltration step to yield a whey ultrafiltrate containing lactose.
Claim 4
Dependent Claim
19 words
The method of claim 2 wherein the porous glass material of both composites consists of zirconia-coated porous glass particles.
Claim 5
Dependent Claim
25 words
The method of claim 3 wherein the reactions take place by continuously passing the solution through plug flow-through columns containing, in respective succession, the composites.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |