US3755194A
Expired / Lapsed
US
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Hydrogenation catalyst
Assignee: Individual
•
Filing: 1969-02-12
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Granted: 1973-08-28
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Expires: 1989-02-12
Abstract
Abstract Hydrogenation catalysts are prepared by forming a complex from equimolar amounts of a platinum group metal halide, e.g. rhodium trichloride, and a pi -bonding aromatic ligand, e.g. aromatic hydrocarbons, alkyl-substituted aromatic quinones, aromatic carboxylic acids, aromatic amino acids, aromatic amino acid peptides and aromatic compounds exhibiting benzenoid-quinoid mesomerism. The complexes are reduced to catalytically active form either during or subsequent to formation.
Inventors
- 👤 V Avilov
- 👤 M Khidekel
- 👤 A Ovcharenko
- 👤 P Chekry
- 👤 O Eremenko
- 👤 O Efimov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:53
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/10; B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2282; B01J31/2295; C07C51/00; C07C51/347; C07C51/36; B01J2231/00; B01J2231/60; B01J2231/64; B01J2231/641; B01J2231/645; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/822; B01J31/02; B01J31/12; B01J31/14; B01J31/146; B01J31/26; B01J31/28; B01J31/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
66 words
A method for the preparation of a hydrogenation catalyst comprising reacting equimolar amounts of rhodium trichloride and a pi -bonding aromatic ligand selected from the group consisting of tyrosine, N-phenyl-anthranilic acid, fluorescein, and rhodamine B in solution at a temperature of about 80* to 100* to form a complex reaction product and reducing the complex as it is formed or after the complex-forming reaction is complete.
Claim 2
Dependent Claim
22 words
A method as in claim 2 wherein the reduction is effected by means of aqueous ethanol during the formation of the complex.
Claim 3
Dependent Claim
24 words
A method as in claim 2 wherein the reduction is effected by means of gaseous hydrogen in aqueous ethanol after the complex has formed.
Claim 4
Dependent Claim
23 words
A method as in claim 2 wherein the reduction is effected by means of NaBH4 in aqueous solution after the complex has formed.
References Cited (Backward Citations)
US2953586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |