Patent US4066705A successfully refreshed from Google Patents.
US4066705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polybenzimidazole fiber supported catalyst
Assignee: Celanese Corp
•
Filing: 1975-10-22
•
Granted: 1978-01-03
•
Expires: 1995-10-22
Abstract
Abstract An improved catalyst is provided which is useful in hydroformylation reactions comprising a rhodium carbonyl complex and a polybenzimidazole fiber support wherein under hydroformylation conditions the rhodium carbonyl complex forms a catalytically active polybenzimidazole complex with the benzimidazole units of the polybenzimidazole fiber surface acting as donor ligands for the rhodium carbonyl complex. This fiber supported catalyst may be readily separated from the products of the hydroformylation reaction by simple filtration.
Inventors
- 👤 O. Richard Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:13
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/165; B01J31/1658; B01J31/18; B01J31/1805; B01J31/181; B01J31/1825; B01J31/20; C; C07; C07C; C07C45/00; C07C45/49; C07C45/50; B01J2231/00; B01J2231/30; B01J2231/32; B01J2231/321; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/822
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
In a hydroformylation process in which an olefin of from 2 to 20 carbon atoms is reacted with carbon monoxide and hydrogen under hydroformylation conditions wherein the temperature varies from about 20° to about 200° C and the pressure varies from about 1 to about 50,000 psi to yield a product selected from the group consisting of aldehyde, alcohol and mixtures thereof; the improvement comprising carrying out the reaction in the presence of an insolubilized polybenzimidazole fiber supported rhodium catalyst wherein a rhodium carbonyl complex of the type [Rh(CO) n X y ] 2 a , where a may vary from 0 to -2, n may vary from 1 to 2, y may vary from 1 to 2, and X is a member selected from the group consisting essentially of a halogen, carboxylate, nitrate, thiocyanate and sulfate, forms a polybenzimidazole complex with the benzimidazole units of the polybenzimidazole fiber surface, said benzimidazole units acting as donor ligands for the rhodium carbonyl complex.
Claim 2
Dependent Claim
162 words
In a hydroformylation process in which an olefin of from 2 to 20 carbon atoms is reacted with carbon monoxide and hydrogen under hydroformylation conditions wherein the temperature varies from about 20° to about 200° C and the pressure varies from about 1 to about 50,000 psi to yield a product selected from the group consisting of aldehyde, alcohol and mixtures thereof; the improvement comprising carrying out the reaction in the presence of an insolubilized polybenzimidazole fiber supported rhodium catalyst wherein a rhodium carbonyl complex of the type [Rh(CO) n X y ] 2 a , where a may vary from 0 to -2, n may vary from 1 to 2, y may vary from 1 to 2, and X is a member selected from the group consisting essentially of a halogen, carboxylate, nitrate, thiocyanate and sulfate, forms a polybenzimidazole complex with the benzimidazole units of the polybenzimidazole fiber surface, said benzimidazole units acting as donor ligands for the rhodium carbonyl complex.
Claim 3
Dependent Claim
91 words
The process of claim 1 wherein said polybenzimidazole fibrous material consists essentially of recurring units of the formula: ##STR10## wherein R is a tetravalent aromatic nucleus, with the nitrogen atoms forming the benzimidazole rings paired upon adjacent carbon atoms of said aromatic nucleus, and R' is selected from the group consisting of (1) an aromatic ring, (2) an alkylene group having from 4 to 8 carbon atoms and (3) a heterocyclic ring selected from the group consisting of (a) pyridine, (b) pyrazone, (c) furan, (d) quinoline, (e) thiophene, and (f) pyran.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said polybenzimidazole fibrous material is poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole.
Claim 5
Dependent Claim
24 words
The process of claim 1 wherein a = 0, n = 2, y = 1, and x = chlorine in said rhodium carbonyl complex.
References Cited (Backward Citations)
US3594425A
Cited
US3636159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |