US3864370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of refining crude synthetic fatty acids
Assignee: Ajinomoto Co Inc
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Filing: 1972-08-02
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Granted: 1975-02-04
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Expires: 1992-08-02
Abstract
Abstract The crude fatty acid mixture produced by oxidation of paraffin is refined by heating to 150* to 350* C in the presence of a solid acid catalyst such as alumina, silica, titania, zirconia, a silica-alumina catalyst, or a molecular sieve to reduce the saponification value and ester value while increasing the iodine value.
Inventors
- 👤 Takashi Yamashita
- 👤 Sadayoshi Ninagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:31
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/487
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
A METHOD OF PURIFYING CRUDE FATTY ACID PRODUCED BY OXIDATION OF PARAFFIN AND ESSENTIALLY CONSISTING OF PURE FATTY ACID AND, AS CONTAMINANTS, ESTER OF SAID FATTY ACID AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF ESTOLIDE, ALCOHOL, LACTONE, AND HYDROXYCARBOXYLIC ACID, WHICH METHOD COMPRISES: A. HOLDING A LIQUID PHASE ESSENTIALLY CONSISTING OF SAID CRUDE FATTY ACID IN CONTACT WITH A SOLID CATALYST AT 150* TO 350*C UNTIL THE AMOUNT OF SAID ESTER IS SUBSTANTIALLY DECREASED, WHEREBY SAID FATTY ACID IS PURIFIED,
Claim 2
Independent Claim
83 words
A METHOD OF PURIFYING CRUDE FATTY ACID PRODUCED BY OXIDATION OF PARAFFIN AND ESSENTIALLY CONSISTING OF PURE FATTY ACID AND, AS CONTAMINANTS, ESTER OF SAID FATTY ACID AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF ESTOLIDE, ALCOHOL, LACTONE, AND HYDROXYCARBOXYLIC ACID, WHICH METHOD COMPRISES: A. HOLDING A LIQUID PHASE ESSENTIALLY CONSISTING OF SAID CRUDE FATTY ACID IN CONTACT WITH A SOLID CATALYST AT 150* TO 350*C UNTIL THE AMOUNT OF SAID ESTER IS SUBSTANTIALLY DECREASED, WHEREBY SAID FATTY ACID IS PURIFIED,
Claim 3
Dependent Claim
19 words
SAID CATALYST BEING INSOLUBLE IN SAID CRUDE FATTY ACID AND INERT TO SAID PURE FATTY ACID AT SAID TEMPERATURE,
Claim 4
Dependent Claim
19 words
SAID CATALYST BEING INSOLUBLE IN SAID CRUDE FATTY ACID AND INERT TO SAID PURE FATTY ACID AT SAID TEMPERATURE,
Claim 5
Dependent Claim
31 words
SAD CATALYST ESSENTIALLY CONSISTING OF OXIDE OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF ALUMINUM, SILICON, TITANIUM, AND ZIRCONIUM; AND B. SEPARATING THE PURIFIED FATTY ACID FROM SAID CATALYST.
Claim 6
Dependent Claim
31 words
SAD CATALYST ESSENTIALLY CONSISTING OF OXIDE OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF ALUMINUM, SILICON, TITANIUM, AND ZIRCONIUM; AND B. SEPARATING THE PURIFIED FATTY ACID FROM SAID CATALYST.
Claim 7
Dependent Claim
31 words
said catalyst essentially consisting of oxide of at least one member of the group consisting of aluminum, silicon, titanium, and zirconium; and b. separating the purified fatty acid from said catalyst.
Claim 8
Dependent Claim
31 words
said catalyst essentially consisting of oxide of at least one member of the group consisting of aluminum, silicon, titanium, and zirconium; and b. separating the purified fatty acid from said catalyst.
Claim 9
Dependent Claim
19 words
A method as set forth in claim 1, wherein said crude fatty acids are heated to 160* to 310*C.
Claim 10
Dependent Claim
15 words
A method as set forth in claim 2, wherein said catalyst is a silica-alumina catalyst.
Claim 11
Dependent Claim
29 words
A method as set forth in claim 2, wherein said crude fatty acid is heated until the saponification value thereof is reduced and the iodine value thereof is increased.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |