US4146455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating whey
Assignee: Veolia WTS Systems USA Inc
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Filing: 1978-04-19
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Granted: 1979-03-27
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Expires: 1998-04-19
Abstract
Abstract A process for treating liquid whey is disclosed in which raw whey is first partially demineralized by electrodialysis and then subjected to forced flow electrophoresis to effect the separation of lactose and a simultaneous increase in the percentage solids content in the resulting product whey solution.
Inventors
- 👤 Wayne A. McRae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:40
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; A; A23; A23C; A23C9/00; A23C9/14; A23C9/144; B01D57/00; B01D57/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
67 words
A process for the treatment of liquid whey comprising the steps of: first demineralizing said whey by subjecting the whey to electodialysis to effect a substantial reduction in ash content; then subjecting said demineralized whey to forced flow electrophoresis to effect therefrom a separation and a substantial reduction in lactose content and a simultaneous increase in the percentage of protein solids content in the resultant whey product.
Claim 2
Dependent Claim
67 words
A process for the treatment of liquid whey comprising the steps of: first demineralizing said whey by subjecting the whey to electodialysis to effect a substantial reduction in ash content; then subjecting said demineralized whey to forced flow electrophoresis to effect therefrom a separation and a substantial reduction in lactose content and a simultaneous increase in the percentage of protein solids content in the resultant whey product.
Claim 3
Dependent Claim
30 words
The process of claim 1 whereby the electrodialysis process is performed at a temperature of between 35°-40° C. on liquid whey having a total solid content of about between 15-24%.
Claim 4
Dependent Claim
22 words
The process of claim 2 whereby the whey is demineralized until its resistivity is at least about 600 ohm cm 2 .
Claim 5
Dependent Claim
30 words
The process of claim 1 whereby the forced flow electrophoresis process is continued until the solid content of the whey being treated has reached a concentration of at least 30%.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |