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US4069235A
Expired / Lapsed
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Method for manufacture of poly-fatty acids
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1976-01-28
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Granted: 1978-01-17
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Expires: 1996-01-28
Abstract
Abstract A poly-fatty acid is manufactured by continuously passing a higher unsaturated fatty acid, over a catalyst having phosphoric acid deposited on a synthetic silica-alumina carrier.
Inventors
- 👤 Osamu Suzuki
- 👤 Keizo Tanabe
- 👤 Tetsutaro Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:07
CPC Classifications
C; C07; C07C; C07C57/00; C07C57/02; C07C57/03; C09; C09F; C09F7/00; C09F7/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
A method for the manufacture of a poly-fatty acid, which comprises: continuously flowing and contacting at least one straight chain or branched chain ethylenically unsaturated fatty acid having a 8 to 22 carbon atoms with a synthetic silica-alumina catalyst having a composition of 69 to 72 weight % SiO 2 , 27 to 30 weight % Al 2 O 3 not more than 1 weight % Fe 2 O 3 , not more than 1 weight % CaO and not more than 1 weight % MgO and having phosphoric acid supported thereon in an amount of 0.1 to 2.0 milli-equivalent per gram of said synthetic silica-alumina catalyst and maintaining the temperature of the reaction in a range of 150° C to 330° C, whereby said fatty acid is polymerized.
Claim 2
Independent Claim
129 words
A method for the manufacture of a poly-fatty acid, which comprises: continuously flowing and contacting at least one straight chain or branched chain ethylenically unsaturated fatty acid having a 8 to 22 carbon atoms with a synthetic silica-alumina catalyst having a composition of 69 to 72 weight % SiO 2 , 27 to 30 weight % Al 2 O 3 not more than 1 weight % Fe 2 O 3 , not more than 1 weight % CaO and not more than 1 weight % MgO and having phosphoric acid supported thereon in an amount of 0.1 to 2.0 milli-equivalent per gram of said synthetic silica-alumina catalyst and maintaining the temperature of the reaction in a range of 150° C to 330° C, whereby said fatty acid is polymerized.
Claim 3
Dependent Claim
60 words
The method according to claim 1, wherein the ethylenically unsaturated fatty acid having 8 to 22 carbon atoms is selected from the group consisting of oleic acid, linoleic acid, linolenic acid, α-eleostearic acid, β-eleostearic acid, ricinoleic acid, ricinelaidic acid and fatty acids derived from tall oil, sybean oil, linseed oil, cotton seed oil, safflower oil, castor oil and tung oil.
Claim 4
Dependent Claim
26 words
The method according to claim 1, wherein the amount of phosphoric acid supported on the catalyst is from 0.5 to 1.5 milli-equivalent per g of silica-alumina.
Claim 5
Dependent Claim
56 words
The method according to claim 1, wherein the synthetic silica-alumina catalyst having phosphoric acid supported thereon is deprived of its moisture prior to contact with said fatty acid by heating said catalyst in a current of nitrogen gas at a temperature about 10° C higher than the temperature used for the production of the polyfatty acid.
References Cited (Backward Citations)
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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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |