US4067748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the hydrolysis of lactose
Assignee: Portals Water Treatment Ltd
•
Filing: 1976-09-29
•
Granted: 1978-01-10
•
Expires: 1996-09-29
Abstract
Abstract Lactose, especially derived from whey, is efficiently hydrolysed to glucose and galactose by contact in water with a solid, insoluble, stongly acidic ion exchange resin based on certain cross-linked polystyrenes or certain carbohydrates. The products are valuable in food manufacture.
Inventors
- 👤 Melvin Charles Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:14
CPC Classifications
C; C13; C13K; C13K13/00; C13K1/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
39 words
A process for hydrolyzing lactose comprising contacting an aqueous solution of lactose with a solid, insoluble, strongly acidic polystyrene ion exchange resin that is in free acid form and has a degree of cross-linking of from 0.5 to 5%.
Claim 2
Dependent Claim
39 words
A process for hydrolyzing lactose comprising contacting an aqueous solution of lactose with a solid, insoluble, strongly acidic polystyrene ion exchange resin that is in free acid form and has a degree of cross-linking of from 0.5 to 5%.
Claim 3
Dependent Claim
19 words
A process according to claim 1 in which the resin has a degree of cross-linking of 1 to 3.5%.
Claim 4
Dependent Claim
22 words
A process according to claim 1 conducted by stirring together an aqueous solution of lactose and particles of the ion exchange resin.
Claim 5
Dependent Claim
12 words
A process according to claim 1 conducted at 85° to 100° C.
Claim 6
Dependent Claim
21 words
A process according to claim 1 in which the resin is a sulphonated polystyrene cross-linked with 1 to 4% divinyl benzene.
Claim 7
Dependent Claim
20 words
A process according to claim 5 in which the resin is a sulphonated polystyrene cross-linked with about 31/2% divinyl benzene.
Claim 8
Dependent Claim
21 words
A process according to claim 1 in which the lactose is in the form of an aqueous solution derived from whey.
Claim 9
Dependent Claim
33 words
A process according to claim 7 including deriving the aqueous solution from whey by a process comprising treating the whey by ultrafiltration to remove protein and demineralising the resultant solution by ion exchange.
Claim 10
Dependent Claim
31 words
A process according to claim 8, in which the demineralised solution is concentrated to a lactose content of above about 20% by weight by partial evaporation before the hydrolysis is effected.
References Cited (Backward Citations)
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US2681858A
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US2778750A
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US3483031A
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FR2147451A5
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |