Patent DE835558C successfully refreshed from Google Patents.
US5155261A
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Process for acetic acid preparation and heterogenous catalyst for same
Assignee: Celanese International Corp
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Filing: 1991-11-06
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Granted: 1992-10-13
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Expires: 2011-11-06
Abstract
Abstract An improved Monsanto-type process for acetic acid preparation and a heterogeneous-supported catalyst for accomplishing the same, comprising reacting methanol with carbon monoxide under pressure of about 65-80 Bar and temperature of about 170 DEG -200 DEG C. in the presence of methyl iodide and a catalyst comprising an insoluble polymer having pendant free base, N-oxide or quaternized pyridine groups supporting a rhodium species loaded to less than about 10 weight percent (expressed as metal) of the polymer component.
Inventors
- 👤 Charles R. Marston
- 👤 Gerald L. Goe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:02
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/40; B01J31/4015; B01J31/4023; B01J31/4038; B01J31/4046; B01J31/16; B01J31/165; B01J31/1658; B01J31/18; B01J31/1805; B01J31/181; C; C07; C07C; C07C51/00; C07C51/10; C07C51/12; B01J2231/00; B01J2231/30; B01J2231/34; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/822; B01J31/02; B01J31/0231; B01J31/0234; B01J31/0235; B01J31/0239; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
70 words
A commercial process for preparing acetic acid, comprising the step of reacting methanol with carbon monoxide under pressures of about 65-80 Bar and temperature of about 170°-200° C. in the presence of an iodide promoter and a catalyst comprising an insoluble polymer having pendant free base, N-oxide or quaternized pyridine groups supporting a rhodium species loaded to less than about 10 weight percent (expressed as metal) of the polymer component.
Claim 2
Dependent Claim
70 words
A commercial process for preparing acetic acid, comprising the step of reacting methanol with carbon monoxide under pressures of about 65-80 Bar and temperature of about 170°-200° C. in the presence of an iodide promoter and a catalyst comprising an insoluble polymer having pendant free base, N-oxide or quaternized pyridine groups supporting a rhodium species loaded to less than about 10 weight percent (expressed as metal) of the polymer component.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the polymer of said reacting is a copolymer derived from a vinylpyridine.
Claim 4
Dependent Claim
14 words
The process of claim 2 wherein the vinylpyridine polymer of said reacting is 4-vinylpyridine.
Claim 5
Dependent Claim
14 words
The process of claim 2 wherein the vinylpyridine polymer of said reacting is 2-vinylpyridine.
Claim 6
Dependent Claim
17 words
The process of claim 3 wherein the polymer of said reacting is poly(4-vinylpyridine) cross-linked with 2% divinylbenzene.
Claim 7
Dependent Claim
17 words
The process of claim 3 wherein the polymer of said reacting is poly(4-vinylpyridine) cross-linked with 25% divinylbenzene.
Claim 8
Dependent Claim
17 words
The process of claim 4 wherein the polymer of said reacting is poly(4-vinylpyridine) cross-linked with 25% divinylbenzene.
Claim 9
Dependent Claim
16 words
The process of claim 2 wherein the rhodium species of said reacting is rhodium chloride trihydrate.
Claim 10
Dependent Claim
22 words
The process of claim 2 wherein the polymer of said reacting contains at least about 50% by weight of pendant pyridine groups.
Claim 11
Dependent Claim
41 words
The process of claim 2 wherein said reacting step additionally comprises the substeps of: charging a pressure vessel with the liquid reaction components; pressurizing the mixture to about 65.80 Bars with carbon monoxide; and heating the mixture to about 170°-200° C.
Claim 12
Dependent Claim
20 words
The process of claim 10 additionally comprising replenishing the vessel with carbon monoxide to about 65-80 Bar during said heating.
Claim 13
Dependent Claim
17 words
The process of claim 10 additionally comprising recovering the polymer-supported rhodium catalyst after said pressurizing and heating.
Claim 14
Dependent Claim
38 words
The process of claim 12 wherein said recovering additionally comprises decanting the acetic acid product from the reaction mixture after the vessel has been cooled and vented; and filtering the insoluble polymer-supported rhodium catalyst from the reaction mixture.
Claim 15
Dependent Claim
61 words
The process of claim 10 additionally comprising regenerating and recycling the catalyst after said reacting, including the steps of: separating at least a portion of the liquid acetic acid product from the reaction vessel mixture after the vessel has been cooled and vented; recharging the vessel with additional amounts of the liquid reactants; and repeating said pressurizing and said heating steps.
Claim 16
Dependent Claim
16 words
The process of claim 14 wherein said separating, recharging and repeating steps are carried out continuously.
Claim 17
Dependent Claim
26 words
The process of claim 1 wherein said reacting step is such as to achieve about 100% conversion from methanol at about 99% selectivity to acetic acid.
Claim 18
Dependent Claim
26 words
The process of claim 1 wherein said reacting step is such as to achieve an enhanced reaction rate in excess of about 5 mol AcOH/L, hr.
Claim 19
Dependent Claim
26 words
The process of claim 1 wherein said reacting step is such as to achieve an enhanced reaction rate of at least four-fold over a homogeneous-catalyzed reaction.
Claim 20
Dependent Claim
28 words
The process of claim 1 wherein said reacting step is such as to achieve about 50% conversion of methanol to acetic acid in less than about one hour.
Claim 21
Dependent Claim
31 words
The process of claim 1 wherein said reacting step is such as to achieve an average reaction rate from about 0-35% conversion of at least about 10 mol AcOH/mol Rh, min.
References Cited (Backward Citations)
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| 7.5 Years (Year 8) | 1999-10-13 | 2000-04-13 | 2000-10-13 | $3760.00 | Window Closed / Lapsed |
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