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US5364963A
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Supported rhodium catalyst, method of preparing same and process of producing acetic acid by methanol carbonylation using same
Assignee: Chiyoda Corp
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Filing: 1993-12-20
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Granted: 1994-11-15
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Expires: 2013-12-20
Abstract
Abstract A methanol carbonylation catalyst includes a rhodium complex supported on a porous, cross-linked vinylpyridine resin, wherein the vinylpyridine resin has a cross-linking degree of 30-60%, a pore volume of 0.1-0.4 ml/g and an average pore diameter of 20-100 nm. The catalyst may be prepared by contacting the pyridine ring-containing resin with an aqueous solution containing rhodium ion and then contacting the resulting rhodium ion-carrying resin with carbon monoxide and an alkyl iodide in an organic solvent to convert the rhodium ion to a rhodium complex bound to the resin. Acetic acid is produced by reacting carbon monoxide with methanol at a temperature of 140 DEG -250 DEG C. and a partial pressure of carbon monoxide of 7-30 kg/cm2 in the presence of an alkyl iodide and the above catalyst.
Inventors
- 👤 Takeshi Minami
- 👤 Kenji Shimokawa
- 👤 Kazuhiko Hamato
- 👤 Yoshimi Shiroto
- 👤 Noriyuki Yoneda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:30
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/165; B01J31/1658; B01J31/18; B01J31/1805; B01J31/181; C; C07; C07C; C07C51/00; C07C51/10; C07C51/12; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/822; Y; Y10; Y10S; Y10S502/00; Y10S502/506; Y10S502/507
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
48 words
A catalyst for the production of acetic acid from methanol and carbon monoxide, comprising a rhodium complex supported on a porous, cross-linked vinylpyridine resin, wherein said vinylpyridine resin has a cross-linking degree of 30-60%, a pore volume of 0.2-0.4 cc/g and an average pore diameter of 20-100 nm.
Claim 2
Dependent Claim
48 words
A catalyst for the production of acetic acid from methanol and carbon monoxide, comprising a rhodium complex supported on a porous, cross-linked vinylpyridine resin, wherein said vinylpyridine resin has a cross-linking degree of 30-60%, a pore volume of 0.2-0.4 cc/g and an average pore diameter of 20-100 nm.
Claim 3
Dependent Claim
18 words
A catalyst as claimed in claim 1, wherein said vinylpyridine resin is a copolymer of vinylpyridine and styrene.
Claim 4
Dependent Claim
18 words
A catalyst as claimed in to claim 1, wherein said vinylpyridine resin contains divinylbenzene as a cross-linking agent.
Claim 5
Dependent Claim
31 words
A catalyst as claimed in claim 1, wherein the amount of said rhodium complex is 0.2-2% by weight in terms of elemental rhodium based on the weight of said vinylpyridine resin.
Claim 6
Independent Claim
69 words
A method of preparing a supported rhodium catalyst, comprising the steps of: (a) contacting a solid, pyridine ring-containing resin with an aqueous solution containing rhodium ion so that the rhodium ion is bound to said resin; and (b) contacting said rhodium ion-carrying resin with carbon monoxide and an alkyl iodide in an organic solvent so that said rhodium ion is converted to a rhodium complex bound to said resin.
Claim 7
Independent Claim
69 words
A method of preparing a supported rhodium catalyst, comprising the steps of: (a) contacting a solid, pyridine ring-containing resin with an aqueous solution containing rhodium ion so that the rhodium ion is bound to said resin; and (b) contacting said rhodium ion-carrying resin with carbon monoxide and an alkyl iodide in an organic solvent so that said rhodium ion is converted to a rhodium complex bound to said resin.
Claim 8
Dependent Claim
19 words
A method as claimed in claim 5, wherein said organic solvent includes a mixture of methanol with acetic acid.
Claim 9
Dependent Claim
18 words
A method as claimed in claim 5, wherein step (a) is performed at a temperature of 20°-70° C.
Claim 10
Dependent Claim
29 words
A method as claimed in claim 5, wherein step (b) is performed at a temperature of 50°-250° C. under a carbon monoxide partial pressure of 5-30 kg/cm 2 .
Claim 11
Dependent Claim
32 words
A method as claimed in claim 5, wherein said pyridine ring-containing resin has a cross-linking degree of 30-60%, a pore volume of 0.1-0.4 cc/g and an average pore diameter of 20-100 nm.
Claim 12
Dependent Claim
10 words
A catalyst obtained by a method according to claim 9.
Claim 13
Dependent Claim
45 words
A process for the production of acetic acid, comprising reacting carbon monoxide with methanol at a temperature of 140°-250° C. and a partial pressure of carbon monoxide of 7-30 kg/cm 2 in the presence of an alkyl iodide and a catalyst according to claim 1.
References Cited (Backward Citations)
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) | 1997-11-14 | 1998-05-16 | 1998-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-14 | 2002-05-16 | 2002-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-14 | 2006-05-16 | 2006-11-15 | $7700.00 | Window Closed / Lapsed |