US4075188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of crude tall oil
Assignee: Westvaco Corp
•
Filing: 1976-02-02
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Granted: 1978-02-21
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Expires: 1996-02-02
Abstract
Abstract There is disclosed a process for the recovery of fatty acids and rosin acids from tall oil soap by acidification of crude soap with carbon dioxide in the presence of a water-immiscible solvent.
Inventors
- 👤 William G. Vardell, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:40
CPC Classifications
C; C09; C09F; C09F1/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
52 words
A process for treating tall oil soap skimmings comprising admixing said skimmings with a water-immiscible solvent and an amount of carbon dioxide sufficient to acidify said soap to pH 7 to 8, whereby a water-immiscible solvent layer containing said acidified soap and unreacted soap is formed and a bicarbonate-brine layer is formed.
Claim 2
Dependent Claim
52 words
A process for treating tall oil soap skimmings comprising admixing said skimmings with a water-immiscible solvent and an amount of carbon dioxide sufficient to acidify said soap to pH 7 to 8, whereby a water-immiscible solvent layer containing said acidified soap and unreacted soap is formed and a bicarbonate-brine layer is formed.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein said solvent is an aliphatic hydrocarbon from five to ten carbon atoms and mixture thereof.
Claim 4
Dependent Claim
11 words
The process according to claim 1 wherein said solvent is hexane.
Claim 5
Dependent Claim
19 words
The process according to claim 1 wherein said process is carried out at from 10 p.s.i. to 500 p.s.i.
Claim 6
Dependent Claim
17 words
The process according to claim 1, further comprising, separating said solvent layer, adding fresh water and recarbonating.
Claim 7
Dependent Claim
16 words
The process of claim 4, further comprising, separating said solvent layer, adding fresh water and recarbonating.
Claim 8
Dependent Claim
22 words
The process according to claim 5 wherein said recarbonating step is repeated until substantially all of the crude tall oil is recovered.
Claim 9
Dependent Claim
64 words
A process for acidification of tall oil soaps which comprises; a. acidifying tall oil soaps with carbon dioxide, b. co-currently mixing hexane and said tall oil soap to form an emulsion. c. introducing said mixture into a holding tank wherein said emulsion is allowed to break into a solvent/soap-acid layer and a bicarbonate/brine layer, d. separating said layers, and e. recovering tall oil acids.
Claim 10
Dependent Claim
64 words
A process for acidification of tall oil soaps which comprises; a. acidifying tall oil soaps with carbon dioxide, b. co-currently mixing hexane and said tall oil soap to form an emulsion. c. introducing said mixture into a holding tank wherein said emulsion is allowed to break into a solvent/soap-acid layer and a bicarbonate/brine layer, d. separating said layers, and e. recovering tall oil acids.
References Cited (Backward Citations)
US2575013A
Cited
US3901869A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |