Patent US4524029A successfully refreshed from Google Patents.
US4524029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating fatty acids
Assignee: Honeywell UOP LLC
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Filing: 1983-09-22
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Granted: 1985-06-18
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Expires: 2003-09-22
Abstract
Abstract This invention comprises a process for separating a saturated fatty acid from a feed mixture comprising saturated and unsaturated fatty acids, which process comprises contacting the mixture at separation conditions with a molecular sieve comprising a crystalline silica, thereby selectively retaining the saturated fatty acid. The saturated fatty acid is recovered from the molecular sieve by displacement at displacement conditions with a displacement fluid comprising a diluent soluble in the feed mixture and having a polarity index of at least 3.5. Amorphous silica is a preferred binder for the molecular sieve.
Inventors
- 👤 Michael T. Cleary
- 👤 Santi Kulprathipanja
- 👤 Richard W. Neuzil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:54
CPC Classifications
C; C11; C11C; C11C1/00; C11C1/005
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
104 words
A process for separating a saturated fatty acid from an unsaturated fatty acid contained in a feed mixture comprising said acids, said process comprising contacting said feed mixture at separation conditions with a molecular sieve comprising a crystalline silica having a silica to alumina mole ratio of at least 12, thereby selectively retaining said saturated fatty acid, removing the remainder of the feed mixture from the molecular sieve, and recovering said saturated fatty acid from said molecular sieve by displacement at displacement conditions, with a displacement fluid comprising a diluent soluble in said feed mixture and having a polarity index of at least 3.5.
Claim 2
Dependent Claim
104 words
A process for separating a saturated fatty acid from an unsaturated fatty acid contained in a feed mixture comprising said acids, said process comprising contacting said feed mixture at separation conditions with a molecular sieve comprising a crystalline silica having a silica to alumina mole ratio of at least 12, thereby selectively retaining said saturated fatty acid, removing the remainder of the feed mixture from the molecular sieve, and recovering said saturated fatty acid from said molecular sieve by displacement at displacement conditions, with a displacement fluid comprising a diluent soluble in said feed mixture and having a polarity index of at least 3.5.
Claim 3
Dependent Claim
33 words
The process of claim 1 wherein said separation and displacement conditions comprise a temperature in the range of from about 20° to about 200° C. and a pressure sufficient to maintain liquid phase.
Claim 4
Dependent Claim
26 words
The process of claim 1 wherein said saturated fatty acid comprises palmitic, myristic or stearic acid, and said unsaturated fatty acid comprises oleic or linoleic acid.
Claim 5
Dependent Claim
34 words
The process of claim 3 wherein said separation and displacement conditions comprise a temperature in the range of from about 120° C. to about 150° C. and a pressure sufficient to maintain liquid phase.
Claim 6
Dependent Claim
16 words
The process of claim 1 wherein said process is effected with a simulated moving-bed flow system.
Claim 7
Dependent Claim
16 words
The process of claim 5 wherein said simulated moving-bed flow system is of the countercurrent type.
Claim 8
Dependent Claim
18 words
The process of claim 5 wherein said simulated moving-bed flow system is of the co-current high efficiency type.
Claim 9
Dependent Claim
11 words
The process of claim 1 wherein said molecular sieve comprises silicalite.
Claim 10
Dependent Claim
13 words
The process of claim 1 wherein said adsorbent is bound with amorphous silica.
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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) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |