US4111803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering proteinaceous matter from acid whey and tannery unhairing effluents
Assignee: United States Department of Agriculture
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Filing: 1977-06-03
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Granted: 1978-09-05
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Expires: 1997-06-03
Abstract
Abstract Tannery unhairing waste and acid whey are mixed in proportions containing from 20 to 40% by volume of the tannery waste to spontaneously precipitate proteinaceous matter from both waste effluents and leave a relatively clean supernatant liquid. When the mixture is warmed to about 70° C, all macromolecular components are quantitatively precipitated.
Inventors
- 👤 Robert E. Townend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:06
CPC Classifications
C; C02; C02F; C02F9/00; A; A23; A23J; A23J1/00; A23J1/10; A23J1/20; A23J1/205; A23V; A23V2002/00; C02F1/00; C02F1/02; C02F1/38; C02F1/52; C02F1/66; C02F2103/00; C02F2103/22; C02F2103/24; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903; Y10S210/905; Y10S426/00; Y10S426/807; Y10S530/00; Y10S530/827; Y10S530/833; Y10S530/859
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A process for removing and recovering proteinaceous matter from acid whey and tannery unhairing waste and reducing the biological oxygen demand of said acid whey and unhairing waste, comprising mixing aqueous acid whey and aqueous tannery unhairing waste in proportions such that the mixture contains from 20 to 25% tannery waste by volume adjusting the pH of the mixture to from 8 to 10, heating the mixture to about 70° C., allowing said proteinaceous matter to precipitate, and separating the precipitate from the supernatant liquid.
Claim 2
Dependent Claim
85 words
A process for removing and recovering proteinaceous matter from acid whey and tannery unhairing waste and reducing the biological oxygen demand of said acid whey and unhairing waste, comprising mixing aqueous acid whey and aqueous tannery unhairing waste in proportions such that the mixture contains from 20 to 25% tannery waste by volume adjusting the pH of the mixture to from 8 to 10, heating the mixture to about 70° C., allowing said proteinaceous matter to precipitate, and separating the precipitate from the supernatant liquid.
References Cited (Backward Citations)
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Cited
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US1900995A
Cited
US2074082A
Cited
US2742359A
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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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |