Patent DE560206C successfully refreshed from Google Patents.
US4584140A
Expired / Lapsed
US
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Process for separating fatty materials from supported nickel catalysts
Assignee: Cognis Corp
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Filing: 1984-12-17
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Granted: 1986-04-22
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Expires: 2004-12-17
Abstract
Abstract A process for recovering fatty materials, such as fatty acids and lower alkyl esters thereof, from supported nickel catalyst compositions is provided. For the process, the supported nickel catalyst composition, which may also contain non-nickel containing clays/earths, is extracted with a supercritical fluid, preferably supercritical carbon dioxide, to separate the fatty material from the supported nickel catalyst composition.
Inventors
- 👤 Charles W. Blewett
- 👤 Stephen W. Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:04
CPC Classifications
C; C11; C11C; C11C1/00; C11C1/08; C11B; C11B3/00; C11B3/006
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
30 words
The process wherein the fatty material is a fatty acid or lower alkyl ester thereof and constitutes from about 30 to 60 weight percent of the supported nickel catalyst composition.
Claim 2
Dependent Claim
30 words
The process wherein the fatty material is a fatty acid or lower alkyl ester thereof and constitutes from about 30 to 60 weight percent of the supported nickel catalyst composition.
Claim 3
Dependent Claim
30 words
The process of claim 1 wherein the supercritical fluid is carbon dioxide maintained at a temperature from 31° C. to 100° C. and pressure from 1071 psi to 5000 psi.
Claim 4
Dependent Claim
29 words
The process of claim 2 wherein the supported nickel catalyst composition is obtained from the hydrogenation of structurally modified fatty acids produced during the polymerization of unsaturated fatty acids.
Claim 5
Dependent Claim
24 words
The process of claim 3 wherein the supercritical carbon dioxide is maintained at 35° C. to 65° C. and 2500 psi to 4000 psi.
Claim 6
Dependent Claim
12 words
The process of claim 4 wherein the mineral acid is sulfuric acid.
Claim 7
Dependent Claim
28 words
The process of claim 5 wherein the supported nickel catalyst composition is a mixture of spent supported nickel hydrogenation catalyst with a non-nickel containing clay or earth material.
Claim 8
Dependent Claim
169 words
A process for treating a supported nickel catalyst composition containing a fatty material which comprises: (a) contacting the supported nickel catalyst composition having up to 60 percent by weight fatty material associated therewith with an essential equimolar amount, based on the amount of nickel in the supported catalyst composition, of a mineral acid; (b) contacting the acid-treated supported nickel catalyst composition obtained from step (a) with a fluid maintained in a supercritical state for a time sufficient to dissolve a substantial portion of the fatty material in said fluid; (c) separating said fluid having said fatty material dissolved therein and maintained in the supercritical state from the supported nickel catalyst composition; (d) subjecting said fluid having the fatty material dissolved therein obtained from step (c) to conditions which convert the fluid to a non-supercritical state; (e) separating the fatty material from the fluid which is maintained in a non-supercritical fluid state; and (f) recovering the fatty material from step (e) and the supported nickel catalyst composition from step (c).
Claim 9
Dependent Claim
169 words
A process for treating a supported nickel catalyst composition containing a fatty material which comprises: (a) contacting the supported nickel catalyst composition having up to 60 percent by weight fatty material associated therewith with an essential equimolar amount, based on the amount of nickel in the supported catalyst composition, of a mineral acid; (b) contacting the acid-treated supported nickel catalyst composition obtained from step (a) with a fluid maintained in a supercritical state for a time sufficient to dissolve a substantial portion of the fatty material in said fluid; (c) separating said fluid having said fatty material dissolved therein and maintained in the supercritical state from the supported nickel catalyst composition; (d) subjecting said fluid having the fatty material dissolved therein obtained from step (c) to conditions which convert the fluid to a non-supercritical state; (e) separating the fatty material from the fluid which is maintained in a non-supercritical fluid state; and (f) recovering the fatty material from step (e) and the supported nickel catalyst composition from step (c).
References Cited (Backward Citations)
DE2853065A1
Cited
US4280961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |