US4837189A
Expired / Lapsed
US
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Surfactant modified metal catalysts
Assignee: BASF SE
•
Filing: 1988-03-03
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Granted: 1989-06-06
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Expires: 2008-03-03
Abstract
Abstract Surfactant-modified metal catalysts which can be used in a process for hydrogenating mediators.
Inventors
- 👤 Helmut Simon
- 👤 Jordanes Thanos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:40
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/40; C12P1/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
102 words
A modified metal catalyst, for use in hydrogenation reactions, wherein said modified metal catalyst is prepared by a process comprising the steps of: (i) suspending a modifiable metal catalyst selected from the group consisting of nickel and noble metals in water or in a buffer solution under a hydrogen atmosphere; (ii) adding to said suspension 2-5 times the weight, based on said metal catalyst, of a fluorine-containing surfactant, wherein said surfactant has good wetting properties on metal surfaces, to prepare a metal catalyst/surfactant mixture; (iii) shaking or stirring said mixture to prepare said modified catalyst; and (iv) separating out said modified catalyst.
Claim 2
Dependent Claim
102 words
A modified metal catalyst, for use in hydrogenation reactions, wherein said modified metal catalyst is prepared by a process comprising the steps of: (i) suspending a modifiable metal catalyst selected from the group consisting of nickel and noble metals in water or in a buffer solution under a hydrogen atmosphere; (ii) adding to said suspension 2-5 times the weight, based on said metal catalyst, of a fluorine-containing surfactant, wherein said surfactant has good wetting properties on metal surfaces, to prepare a metal catalyst/surfactant mixture; (iii) shaking or stirring said mixture to prepare said modified catalyst; and (iv) separating out said modified catalyst.
Claim 3
Dependent Claim
21 words
The modified catalyst of claim 1, wherein said modified catalyst is not capable of transferring hydrogen directly to a hydrogenation substrate.
Claim 4
Dependent Claim
13 words
The catalyst of claim 1, wherein said metal catalyst is palladium or platinum.
Claim 5
Dependent Claim
132 words
The catalyst of claim 1, wherein said surfactant is selected from the group consisting of R f CH 2 CH 2 SCH 2 CH 2 CO 2 Li, (R f CH 2 CH 2 O) 1 ,2 P(O)(ONH 4 ) 2 ,1' (R f CH 2 CH 2 O) 1 ,2 P(O)(OH) 2 ,1' R f CH 2 CH 2 SCH 2 CH 2 N + (CH 3 ) 3 CH 3 SO 3 - , R f CH 2 CH 2 O(CH 2 CH 2 O(CH 2 CH 2 O) x H, R f CH 2 CH(OCOCH 3 )CH 2 N + (CH 3 ) 2 CH 2 CO 2 - , flouroalkyl poly(ethylenoxide)ethanol, and mixtures thereof with non-fluorinated surfactants, wherein R f is F(CF 2 CF 2 ) 3-8 .
Claim 6
Dependent Claim
22 words
The catalyst of claim 1 wherein said suspending step comprises adding 0.2-1.0 ml of water or buffer per mg of metal catalyst.
Claim 7
Dependent Claim
20 words
The catalyst of claim 1, wherein sais mixture is shaken or stirred for about 10-30 hours at about 20°-40° C.
Claim 8
Dependent Claim
13 words
The catalyst of claim 1, wherein said separating step comprises centrifuging or decanting.
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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) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |