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US4077906A
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Polybenzimidazole fiber supported catalyst
Assignee: Celanese Corp
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Filing: 1977-04-01
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Granted: 1978-03-07
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Expires: 1997-04-01
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 and 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
2026-11-09 04:23
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: 10
Claim 1
Independent Claim
99 words
A fiber supported insolubilized catalyst useful in hydroformylation reactions comprising; a. a rhodium carbonyl complex [Rh(CO) n X y ] a 2 , 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 reacted with b. a polybenzimidazole fiber support wherein said rhodium carbonyl complex forms a polybenzimidazole complex with the benzimidazole units of the polybenzimidazole fiber surface thereby acting as donor ligands for said rhodium carbonyl complex.
Claim 2
Dependent Claim
99 words
A fiber supported insolubilized catalyst useful in hydroformylation reactions comprising; a. a rhodium carbonyl complex [Rh(CO) n X y ] a 2 , 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 reacted with b. a polybenzimidazole fiber support wherein said rhodium carbonyl complex forms a polybenzimidazole complex with the benzimidazole units of the polybenzimidazole fiber surface thereby acting as donor ligands for said rhodium carbonyl complex.
Claim 3
Dependent Claim
24 words
The catalyst of claim 1 wherein a = o, n = 2, y = 1, and X = chlorine in said rhodium carbonyl complex.
Claim 4
Dependent Claim
91 words
The catalyst 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) pyrazine, (c) furan, (d) quinoline, (e) thiophene, and (f) pyran.
Claim 5
Dependent Claim
12 words
The catalyst of claim 1 wherein the polybenzimidazole fiber support is poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole.
Claim 6
Dependent Claim
94 words
A process for making a polybenzimidazole fiber supported insolubelized rhodium catalyst which comprises: providing a rhodium carbonyl complex of the type [Rh(CO) n X y ] a 2 where a may vary from 0 to -2, n may vary from 1 to 2, y may vary from 1 to 2, X is a member selected from the group consisting essentially of halogen, carboxylate, nitrate, thiocyanate and sulfate, and reacting said rhodium complex with a polybenzimidazole fiber wherein the benzimidazole units of the polybenzimidazole fiber surface act as donor ligands of the rhodium carbonyl complex.
Claim 7
Dependent Claim
94 words
A process for making a polybenzimidazole fiber supported insolubelized rhodium catalyst which comprises: providing a rhodium carbonyl complex of the type [Rh(CO) n X y ] a 2 where a may vary from 0 to -2, n may vary from 1 to 2, y may vary from 1 to 2, X is a member selected from the group consisting essentially of halogen, carboxylate, nitrate, thiocyanate and sulfate, and reacting said rhodium complex with a polybenzimidazole fiber wherein the benzimidazole units of the polybenzimidazole fiber surface act as donor ligands of the rhodium carbonyl complex.
Claim 8
Dependent Claim
31 words
The process for making said polybenzimidazole fiber supported catalyst of claim 5 wherein a = 0, n = 2, y = 1, and x = chlorine in said rhodium carbonyl complex.
Claim 9
Dependent Claim
97 words
The process for making said polybenzimidazole fiber supported catalyst of claim 5 wherein the polybenzimidazole fiber consists essentially of recurring units of the formula: ##STR11## 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) pyrazine, (c) furau, (d) quinoline, (e) thiophene, and (f) pyran.
Claim 10
Dependent Claim
19 words
The process for making said polybenzimidazole fiber supported catalyst of claim 5 wherein the benzimidazole fiber is poly-2,2'-(m-phenylene)-5,5'- bibenzimidazole.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |