US4749670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective regeneration of mediators in the presence of a catalyst and surfactant
Assignee: BASF SE
•
Filing: 1986-12-08
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Granted: 1988-06-07
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Expires: 2006-12-08
Abstract
Abstract A process for hydrogenating mediators with the aid of surfactant-modified metal catalysts, and catalysts which can be used for this purpose, are described.
Inventors
- 👤 Helmut Simon
- 👤 Jordanes Thanos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:52
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/40; C12P1/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
87 words
A process for the regeneration of a mediator used in biochemical reductions with hydrogen, comprising the steps of: hydrogenating a solution of a mediator selected from the group consisting of viologen dyes, anthraquinone dyes, quinone dyes, triphenylmethane dyes, phthalocyanines, methine dyes, metal chelate complexes of pyrrole dyes and porphyrin derivatives, pteridines, pteridones, flavines and complexes of metals of subgroups 6, 7 and 8, with hydrogen gas at 10°-90° C. and a pH of 3-10 in the presence of a metal catalyst modified with a fluorine containing surfactant.
Claim 2
Dependent Claim
87 words
A process for the regeneration of a mediator used in biochemical reductions with hydrogen, comprising the steps of: hydrogenating a solution of a mediator selected from the group consisting of viologen dyes, anthraquinone dyes, quinone dyes, triphenylmethane dyes, phthalocyanines, methine dyes, metal chelate complexes of pyrrole dyes and porphyrin derivatives, pteridines, pteridones, flavines and complexes of metals of subgroups 6, 7 and 8, with hydrogen gas at 10°-90° C. and a pH of 3-10 in the presence of a metal catalyst modified with a fluorine containing surfactant.
Claim 3
Dependent Claim
25 words
The process of claim 1, wherein said viologen dye is a member selected from the group consisting of methylviologen, benzyl viologen, carboxamidomethyl viologen and diquat.
Claim 4
Dependent Claim
25 words
The process of claim 1, wherein said anthraquinone dyes and quinone dyes are selected from the group consisting of phenosafranin, methylene blue and anthraquinonesulfonic acids.
Claim 5
Dependent Claim
21 words
The process of claim 1, wherein said triphenylmethane dyes are selected from the group consisting of methyl violet and crystal violet.
Claim 6
Dependent Claim
20 words
The process of claim 1, wherein said phthalocyanines are selected from the group consisting of Fe, Cu and Co phthalocyanines.
Claim 7
Dependent Claim
11 words
The process of claim 1, wherein said methine dye is astraphloxin.
Claim 8
Dependent Claim
18 words
The process of claim 1, wherein said flavines are selected from the group consisting of acriflavine and lumiflavine.
Claim 9
Dependent Claim
46 words
The process of claim 1, wherein said metal complexes are selected from the group consisting of 1,1'-bis(hydroxymethyl)-ferrocene, ferrocene monocarboxylic acids, and complexes having the formula Ru (L 2 L' 2 ) +2 , wherein L is 1,10-phenanthroline, 2,2-bipyridyl or 5-nitro-1,10-phenanthroline and L' is pyridine or 4-methylpyridine.
Claim 10
Dependent Claim
14 words
The process of claim 1, wherein said mediator is methyl viologen or benzyl viologen.
Claim 11
Dependent Claim
20 words
The process of claim 1, wherein said metal catalyst is selected from the group consisting of nickel and noble metals.
Claim 12
Dependent Claim
13 words
The process of claim 10, wherein said metal catalyst is palladium or platinum.
Claim 13
Dependent Claim
13 words
The process of claim 1, wherein said surfactant is a fluorine-containing cationic surfactant.
Claim 14
Dependent Claim
36 words
The process of claim 12, wherein said fluorine-containing surfactant is [F(CF 2 --CF 2 ) 3-8 --CH 2 --CH 2 --S--CH 2 --CH 2 --N(CH 3 ) 3 ] + CH 3 SO 4 - .
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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) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |