US5466874A
Expired / Lapsed
US
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Polymeric carbonylation catalyst system
Assignee: Celanese International Corp
•
Filing: 1993-08-24
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Granted: 1995-11-14
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Expires: 2013-08-24
Abstract
Abstract A carbonylation catalyst useful for the carbonylation of methanol to acetic acid, acetic anhydride or both comprises a polymer support containing pendant pyrrolidone groups which support a rhodium species. Other polymeric supports capable of withstanding carbonylation temperatures of at least 150 DEG C. are disclosed for the carbonylation reaction in which rhodium levels in the reaction medium of greater than 500 ppm are contemplated.
Inventors
- 👤 Mark O. Scates
- 👤 R. Jay Warner
- 👤 G. Paull Torrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:12
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; B01J31/0231; B01J31/16; B01J31/165; B01J31/18; B01J31/1805; C; C07; C07C; C07C51/00; C07C51/10; C07C51/12; C07C51/54; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/822
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
67 words
In a process for the carbonylation of an alcohol, ether or ester to products comprising a carboxylic acid, the anhydride thereof or coproduction of said carboxylic acid and anhydride thereof under carbonylation conditions in a reaction medium containing a rhodium catalyst and an iodide promoter, the improvement which comprises using as said rhodium catalyst a polymer containing pendant pyrrolidone groups, said pyrrolidone groups supporting a rhodium species.
Claim 2
Dependent Claim
67 words
In a process for the carbonylation of an alcohol, ether or ester to products comprising a carboxylic acid, the anhydride thereof or coproduction of said carboxylic acid and anhydride thereof under carbonylation conditions in a reaction medium containing a rhodium catalyst and an iodide promoter, the improvement which comprises using as said rhodium catalyst a polymer containing pendant pyrrolidone groups, said pyrrolidone groups supporting a rhodium species.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said polymer is a solid.
Claim 4
Dependent Claim
14 words
The process of claims 1 or 2 wherein said polymer is derived from vinylpyrrolidone.
Claim 5
Dependent Claim
13 words
The process of claim 2 wherein said polymer is polyvinylpyrrolidone cross-linked with divinylbenzene.
Claim 6
Dependent Claim
31 words
The process of claim 1 wherein said alcohol is methanol, said ester is methyl acetate and said products comprise acetic acid, acetic anhydride or coproduction of acetic acid and acetic anhydride.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein said iodide promoter comprises an alkyl iodide.
Claim 8
Dependent Claim
13 words
The process of claim 6 wherein said alkyl iodide promoter is methyl iodide.
Claim 9
Dependent Claim
44 words
The process of claim 1 wherein said reaction medium contains a finite amount of water up to less than 14 wt. % and 0 to less than 10 wt. % as equivalent molar lithium iodide of an iodide salt different than said iodide promoter.
Claim 10
Dependent Claim
12 words
The process of claim 8 wherein said iodide salt is lithium iodide.
Claim 11
Dependent Claim
15 words
The process of claim 8 wherein said reaction medium contains 0% of said iodide salt.
Claim 12
Dependent Claim
16 words
The process of claim 1 wherein said reaction medium contains greater than 500 ppm of rhodium.
Claim 13
Dependent Claim
15 words
The process of claim 11 wherein said reaction medium contains greater than 900 ppm rhodium.
Claim 14
Dependent Claim
15 words
The process of claim 12 wherein said reaction medium comprises 1000 to 5000 ppm rhodium.
Claim 15
Dependent Claim
28 words
The process of claim 2 wherein said catalyst comprises a mixture of a heterogeneous catalyst composed of said liquid or said solid polymer and a homogeneous rhodium catalyst.
Claim 16
Dependent Claim
90 words
In a process for the carbonylation of an alcohol, ether or ester to products comprising a carboxylic acid, anhydride thereof or coproduction of said carboxylic acid and anhydride thereof under carbonylation conditions in a reaction medium comprising a rhodium catalyst and an iodide promoter, the improvement which comprises using as said rhodium catalyst a polymer containing a group which supports a rhodium species, said polymer being stable at said carbonylation conditions including a temperature of at least 150° C., said reaction medium comprising greater than 500 ppm of said rhodium.
Claim 17
Dependent Claim
90 words
In a process for the carbonylation of an alcohol, ether or ester to products comprising a carboxylic acid, anhydride thereof or coproduction of said carboxylic acid and anhydride thereof under carbonylation conditions in a reaction medium comprising a rhodium catalyst and an iodide promoter, the improvement which comprises using as said rhodium catalyst a polymer containing a group which supports a rhodium species, said polymer being stable at said carbonylation conditions including a temperature of at least 150° C., said reaction medium comprising greater than 500 ppm of said rhodium.
Claim 18
Dependent Claim
15 words
The process of claim 15 wherein said reaction medium comprises greater than 900 ppm rhodium.
Claim 19
Dependent Claim
17 words
The process of claim 16 wherein said reaction medium comprises from about 1000 to 5000 ppm rhodium.
Claim 20
Dependent Claim
17 words
The process of claim 15 wherein said polymer is stable at temperatures of at least 150° C.
Claim 21
Dependent Claim
28 words
The process of claim 15 wherein said polymer is a liquid homogeneous with said reaction medium, a liquid heterogeneous with respect to said reaction medium or a solid.
Claim 22
Dependent Claim
11 words
The process of claim 15 wherein said polymer is a solid.
Claim 23
Dependent Claim
17 words
The process of claim 1 wherein said rhodium catalyst is heterogeneous with respect to said reaction medium.
Claim 24
Dependent Claim
17 words
The process of claim 1 wherein said rhodium catalyst is homogeneous with respect to said reaction medium.
Claim 25
Dependent Claim
42 words
The process of claim 1 wherein said reaction medium contains a finite amount of water up to less than 14 wt. % and up to 20 wt. % as equivalent molar lithium iodide of an iodide salt different than said iodide promoter.
Claim 26
Dependent Claim
29 words
The process of claim 2 wherein said reaction medium further contains up to 20 wt. % as equivalent molar lithium iodide of an iodide salt other than said promoter.
Claim 27
Dependent Claim
42 words
The process of claim 15 wherein said reaction medium contains a finite amount of water up to less than 14 wt. % and up to 20 wt. % as equivalent molar lithium iodide of an iodide salt different than said iodide promoter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1998-11-13 | 1999-05-15 | 1999-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-13 | 2003-05-15 | 2003-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-13 | 2007-05-15 | 2007-11-14 | $7700.00 | Window Closed / Lapsed |