Patent US3901869A successfully refreshed from Google Patents.
US3901869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acidification of tall oil soap
Assignee: Westvaco Corp
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Filing: 1974-01-11
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Granted: 1975-08-26
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Expires: 1994-01-11
Abstract
Abstract There is disclosed a process for the recovery of fatty acids and rosin acids from tall oil soap by acidification of the tall oil soap with from three-fourths part to 2 parts of water per part of tall oil soap with carbon dioxide at a temperature between ambient and 120*F. This reaction proceeds to at least 40% in one hour with thorough mixing. The remaining tall oil soap may then, if desired, after separation from the bicarbonate-brine layer be further acidified with sulfuric acid or recycled for further carbonation to recover the remaining tall oil soap as crude tall oil.
Inventors
- 👤 Alan M Bills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:40
CPC Classifications
C; C09; C09F; C09F1/00; C07; C07C; C07C51/00; C07C51/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A PROCESS FOR ACIDIFICATION OF TALL OIL SOAPS WHICH COMPRISES, ACIDIFYING TALL OIL SOAPS CONTAINING FROM 75% TO 200% BY WEIGHT OF WATER PER PART OF TALL OIL SOAPS WITH AN AMOUNT OF CARBON DIOXIDE SUFFICIENT TO LOWER THE PH TO BETWEEN 7 - 8 AT A TEMPERATURE FROM AMBIENT TO 120*F., ALLOWING SAID ACIDIFIED TALL OIL SOAP TO SETTLE INTO A SOAP-ACID LAYER AND A BICARBONATE BRINE LAYER,
Claim 2
Dependent Claim
69 words
A PROCESS FOR ACIDIFICATION OF TALL OIL SOAPS WHICH COMPRISES, ACIDIFYING TALL OIL SOAPS CONTAINING FROM 75% TO 200% BY WEIGHT OF WATER PER PART OF TALL OIL SOAPS WITH AN AMOUNT OF CARBON DIOXIDE SUFFICIENT TO LOWER THE PH TO BETWEEN 7 - 8 AT A TEMPERATURE FROM AMBIENT TO 120*F., ALLOWING SAID ACIDIFIED TALL OIL SOAP TO SETTLE INTO A SOAP-ACID LAYER AND A BICARBONATE BRINE LAYER,
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said soap-acid layer is recycled.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said carbon dioxide is a gas.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein said carbon dioxide is a liquid.
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein saId carbon dioxide is a solid.
Claim 7
Dependent Claim
20 words
The process of claim 1 wherein the reaction is carried out at a pressure from 10 p.s.i. to 150 p.s.i.
Claim 8
Dependent Claim
97 words
A process for acidification of tall oil soaps which comprises, a. acidifying tall oil soaps containing from 75% to 200% by weight of water per part of tall oil soap with an amount of carbon dioxide sufficient to lower the pH to between 7 and 8 at a temperature from ambient to 120*F., b. allowing said acidified tall oil soap to settle into a soap-acid layer and a bicarbonate brine layer, c. separating said soap-acid layer from said bicarbonate brine layer, and d. acidifying said soap-acid layer to a pH between 3 and 4 with sulfuric acid.
Claim 9
Dependent Claim
97 words
A process for acidification of tall oil soaps which comprises, a. acidifying tall oil soaps containing from 75% to 200% by weight of water per part of tall oil soap with an amount of carbon dioxide sufficient to lower the pH to between 7 and 8 at a temperature from ambient to 120*F., b. allowing said acidified tall oil soap to settle into a soap-acid layer and a bicarbonate brine layer, c. separating said soap-acid layer from said bicarbonate brine layer, and d. acidifying said soap-acid layer to a pH between 3 and 4 with sulfuric acid.
Claim 10
Dependent Claim
23 words
The process of claim 7 wherein the acidification with carbon dioxide is carried out at a pressure from 10 p.s.i. to 150 p.s.i.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |