Patent US4495095A successfully refreshed from Google Patents.
US4495095A
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US
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Acidulation and recovery of crude tall oil from tall oil soaps
Assignee: Union Camp Corp
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Filing: 1983-04-04
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Granted: 1985-01-22
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Expires: 2003-04-04
Abstract
Abstract In the present invention, tall oil acids are prepared by acidulating tall oil soap with supercritical fluid carbon dioxide. The method of preparation is carried out at a temperature of from about 31° to 400° C. and the supercritical carbon dioxide is under a pressure of from about 1075 to about 50,000 psi. The acidulate is extracted into the fluid phase of the supercritical carbon dioxide. The resultant tall oil acids are then recovered from the carbon dioxide fluid phase.
Inventors
- 👤 Nelson E. Lawson
- 👤 Gamal I. Amer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:03
CPC Classifications
C; C11; C11B; C11B13/00; C11B13/02; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0403; B01D11/0407; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/74
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
35 words
A method for the preparation of crude tall oil which comprises acidulating tall oil soaps with supercritical carbon dioxide and thereafter recovering the resulting acidulated material from the fluid phase of the supercritical carbon dioxide.
Claim 2
Independent Claim
35 words
A method for the preparation of crude tall oil which comprises acidulating tall oil soaps with supercritical carbon dioxide and thereafter recovering the resulting acidulated material from the fluid phase of the supercritical carbon dioxide.
Claim 3
Dependent Claim
18 words
The method of claim 1 carried out at a temperature of from about 31° to about 400° C.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein the supercritical carbon dioxide is under a pressure of from about 1075 to about 50,000 psi.
Claim 5
Dependent Claim
25 words
The method of claim 1 wherein the acidulated material is immediately extracted from the soaps and into the fluid phase of the supercritical carbon dioxide.
References Cited (Backward Citations)
US2232331A
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US3969196A
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US3965085A
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US4075188A
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US4349415A
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US4250331A
Cited
US4308200A
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US4422966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |