US3615664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of whey
Assignee: Dairy Technology Ltd
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Filing: 1969-12-05
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Granted: 1971-10-26
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Expires: 1989-12-05
Abstract
Abstract Liquid whey is subjected to concentration, crystallization of lactose and removal of lactose crystals. The resulting whey is clarified and electrodialyzed. It can be sold or used in liquid form, or may be further concentrated and dried to make a demineralized dry product with a reduction in ash content of at least 15 percent.
Inventors
- 👤 Leo H Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:10
CPC Classifications
A; A23; A23C; A23C21/00; A23C9/00; A23C9/14; A23C9/144
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A method as in claim 1 in which lactose is removed from the whey by first removing the larger lactose crystals and then centrifuging the whey to remove a sludge containing smaller lactose crystals.
Claim 2
Dependent Claim
190 words
In a method for the treatment of whey selected from the group consisting of Cheddar cheese whey, sour cottage cheese whey and neutralized sweet cottage cheese whey for the manufacture of a food product, the steps of concentrating the whey to a solids content of at least about 50 percent to effect crystallization of lactose, removing the larger lactose crystals from the whey, subjecting the whey to centrifuging for the removal of smaller lactose crystals, heating the whey to a temperature level of from 110* to 120* F. to eliminate residual lactose crystals, clarifying the liquid material with removal of insoluble protein and curd fragments, subjecting the clarified liquid at a pH from 3.9 to 6.5 for Cheddar cheese whey, from 3.9 to 4.2 for cottage cheese whey, and from 4.65 to 6.5 for neutralized sweet cottage cheese whey to electrodialysis to effect a substantial reduction in ash content of from 20 to 55 percent, the concentrate as subjected to electrodialysis having a solids content not in excess of about 33 percent, concentrating the electrodialyzed material and then subjecting the concentrate to spray drying to produce a discrete dry product.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |