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US4408069A
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Conversion of methanol to methyl acetate using iron-cobalt catalyst
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1980-10-06
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Granted: 1983-10-04
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Expires: 2000-10-06
Abstract
Abstract A homogeneous catalytic process for the conversion of methanol to methyl acetate. The process comprises contacting CO with methanol in the presence of a catalytically effective amount of an iron-cobalt carbonyl complex of the formula M[FeCo3(CO)12] or M[CoFe3(CO)13] where M is hydrogen or a cation and an iodide promoter, heating the resultant mixture at temperatures of from 100 DEG to 250 DEG C. at pressures of from 5 to 100 MPa.
Inventors
- 👤 Gerald Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:38
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0234; B01J31/0271; B01J31/0231; B01J31/0235; B01J31/0239; B01J31/0255; B01J31/0267; B01J31/0268; B01J31/16; B01J31/20; C; C07; C07C; C07C29/00; C07C29/32; C07C45/00; C07C45/49; C07C67/00; C07C67/36; B01J2231/00; B01J2231/30; B01J2231/34; B01J2231/60; B01J2231/64; B01J2231/641; B01J2531/00; B01J2531/02; B01J2531/0202; B01J2531/0211; B01J2531/80; B01J2531/84; B01J2531/842; B01J2531/845; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
185 words
A process for the homogeneous catalytic conversion of methanol to methyl acetate which comprises contacting methanol with carbon monoxide in an organic solvent in the presence of a catalytically effective amount of an iron-cobalt carbonyl cluster complex of the formula M[FeCo 3 (CO) 12 ] or M[CoFe 3 (CO) 13 ] where M is hydrogen, alkali metal cation, (C 6 H 5 ) 3 PNP(C 6 H 5 ) 3 + , cations of C 3 to C 9 heterocyclic compounds having nitrogen in a ring, R 1 R 2 R 3 R 4 N + , R 1 R 2 R 3 R 4 P + or R 1 R 2 R 3 R 4 As + where R 1 to R 4 are each hydrogen, C 1 to C 20 alkyl, C 3 to C 8 cycloalkyl, benzyl, phenyl or phenyl substituted by lower alkyl, lower alkoxy or halogen and an effective amount of an iodide promoter, and heating the resulting mixture to a temperature of from about 100° C. to 250° C. at a pressure of from about 5 to 100 MPa.
Claim 2
Dependent Claim
185 words
A process for the homogeneous catalytic conversion of methanol to methyl acetate which comprises contacting methanol with carbon monoxide in an organic solvent in the presence of a catalytically effective amount of an iron-cobalt carbonyl cluster complex of the formula M[FeCo 3 (CO) 12 ] or M[CoFe 3 (CO) 13 ] where M is hydrogen, alkali metal cation, (C 6 H 5 ) 3 PNP(C 6 H 5 ) 3 + , cations of C 3 to C 9 heterocyclic compounds having nitrogen in a ring, R 1 R 2 R 3 R 4 N + , R 1 R 2 R 3 R 4 P + or R 1 R 2 R 3 R 4 As + where R 1 to R 4 are each hydrogen, C 1 to C 20 alkyl, C 3 to C 8 cycloalkyl, benzyl, phenyl or phenyl substituted by lower alkyl, lower alkoxy or halogen and an effective amount of an iodide promoter, and heating the resulting mixture to a temperature of from about 100° C. to 250° C. at a pressure of from about 5 to 100 MPa.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein the iron-cobalt carbonyl complex is (C 4 H 9 ) 4 N[FeCo 3 (CO) 12 ].
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein the concentration of iron-cobalt carbonyl complex is from 0.0001 M to 0.1 M.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein the temperature is from 140° to 220° C.
Claim 6
Dependent Claim
30 words
The process of claim 1 wherein the promoter is at least one of alkyl iodide, hydrogen iodide, tetraalkylammonium iodide, tetraalkyl phosphonium iodide, tetraphenyl phosphonium iodide, tetraalkylarsonium iodide or tetraphenylarsonium iodide.
Claim 7
Dependent Claim
24 words
The process of claim 1 wherein the ratio of moles of iodide to gram atoms of iron plus cobalt is from 0.5:1 to 100:1.
Claim 8
Dependent Claim
15 words
The process of claim 1 wherein the reaction is heated for 0.1 to 24 hours.
Claim 9
Dependent Claim
33 words
The process of claim 1 wherein the iron-cobalt carbonyl complex is generated in situ from iron and cobalt compounds capable of forming the iron-cobalt carbonyl complex in the presence of an M cation.
Claim 10
Dependent Claim
11 words
The process of claim 1 wherein the organic solvent is methanol.
Claim 11
Dependent Claim
172 words
A process for the homogeneous catalytic conversion of methanol to methyl acetate which comprises contacting methanol with carbon monoxide in an organic solvent in the presence of a catalytically effective amount of an iron-cobalt carbonyl complex of the formula M[FeCo 3 (CO) 12 ] where M is an alkali metal cation, (C 6 H 5 ) 3 PNP(C 6 H 5 ) 3 .sup.⊕, cations of C 3 to C 9 heterocyclic compounds having nitrogen in a ring, R 1 R 2 R 3 R 4 N.sup.⊕, R 1 R 2 R 3 R 4 P.sup.⊕ or R 1 R 2 R 3 R 4 As.sup.⊕ where R 1 to R 4 are each hydrogen, C 1 to C 20 alkyl, C 3 to C 8 cycloalkyl, benzyl, phenyl or phenyl substituted by lower alkyl, lower alkoxy or halogen and an effective amount of an iodide promoter, and heating the resulting mixture to a temperature of from about 100° to 250° C. at a pressure of from about 5 to 100 MPa.
Claim 12
Dependent Claim
172 words
A process for the homogeneous catalytic conversion of methanol to methyl acetate which comprises contacting methanol with carbon monoxide in an organic solvent in the presence of a catalytically effective amount of an iron-cobalt carbonyl complex of the formula M[FeCo 3 (CO) 12 ] where M is an alkali metal cation, (C 6 H 5 ) 3 PNP(C 6 H 5 ) 3 .sup.⊕, cations of C 3 to C 9 heterocyclic compounds having nitrogen in a ring, R 1 R 2 R 3 R 4 N.sup.⊕, R 1 R 2 R 3 R 4 P.sup.⊕ or R 1 R 2 R 3 R 4 As.sup.⊕ where R 1 to R 4 are each hydrogen, C 1 to C 20 alkyl, C 3 to C 8 cycloalkyl, benzyl, phenyl or phenyl substituted by lower alkyl, lower alkoxy or halogen and an effective amount of an iodide promoter, and heating the resulting mixture to a temperature of from about 100° to 250° C. at a pressure of from about 5 to 100 MPa.
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) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |