EP0616997A1
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EP
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Process for the recovery of a carbonylation product
Assignee: BP Chemicals Ltd
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Filing: 1994-03-09
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Granted: —
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Expires: 2014-03-09
Abstract
Abstract A process for the recovery of a carbonylation product from a liquid reaction composition of an iridium-catalysed carbonylation reaction of a carbonylatable reactant comprises subjecting the composition to a vapourisation with or without the addition of heat to produce a vapour-fraction and a liquid fraction, the vapour fraction comprises carbonylation product and the liquid fraction has a water concentration of at least 0.5% by weight to stabilise the iridium catalyst.
Inventors
- 👤 Kirsten Everald Clode
- 👤 Derrick John Watson
- 👤 Carl Jozef Elsa Vercauteren
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 17:34
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/54; C07C51/573; B; B01; B01J; B01J31/00; B01J31/02; B01J31/0231; B01J31/04; B01J31/16; B01J31/20; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2226; B01J31/223; B01J31/2234; B01J31/40; B01J31/4015; B01J31/4023; B01J31/4038; B01J31/4092; C07C51/10; C07C51/12; C07C51/42; C07C51/43; C07C51/44; C07C67/00; C07C67/36; C07C67/48; C07C67/52; C07C67/54; B01J2231/00; B01J2231/30; B01J2231/34; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/827; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
98 words
A process for the recovery of a carbonylation product from a liquid reaction composition of an iridium-catalysed carbonylation reaction of a carbonylatable reactant, which composition comprises carbonylation product and free or combined iridium carbonylation catalyst, which process comprises subjecting the liquid carbonylation reaction composition to a vaporisation with or without the addition of heat to produce a vapour fraction comprising carbonylation product and a liquid fraction comprising iridium carbonylation catalyst, and separating the liquid and vapour fractions and in which process there is maintained in the liquid fraction a concentration of water of at least 0.5% by weight.
Claim 2
Dependent Claim
23 words
A process as claimed in claim 1 in which the concentration of water in the liquid fraction is 1 to 10% by weight.
Claim 3
Dependent Claim
27 words
A process as claimed in claim 1 in which said liquid fraction further comprises a halide carbonylation promoter at a concentration of 0.01 to 20% by weight.
Claim 4
Dependent Claim
16 words
A process as claimed in claim 3 in which said halide carbonylation promoter is methyl iodide.
Claim 5
Dependent Claim
26 words
A process as claimed in any one of claims 1 to 4 in which said liquid fraction further comprises an ester derivative of said carbonylatable reactant.
Claim 6
Dependent Claim
27 words
A process as claimed in claim 5 in which said ester derivative is present in said liquid fraction at a concentration of 1 to 50% by weight.
Claim 7
Dependent Claim
15 words
A process as claimed in claim 6 in which said ester derivative is methyl acetate.
Claim 8
Dependent Claim
42 words
A process as claimed in claim 1 in which said liquid fraction comprises by weight 1 to 15% water, 0.1 to 1.0% iridium carbonylation catalyst, 0.1 to 10% alkyl halide carbonylation promoter and 3 to 35% ester derivative of the carbonylatable reactant.
Claim 9
Dependent Claim
212 words
A process as claimed in claim 1 for the recovery of a carboxylic acid carbonylation product of an alcohol, ester, hydrocarbyl halide and/or hydrocarbyl ether carbonylatable reactant, from a liquid carbonylation reaction composition comprising carboxylic acid carbonylation product, free or combined iridium carbonylation catalyst and ester derivative of the carbonylatable reactant which process comprises (a) subjecting the liquid carbonylation reaction composition to a vapourisation in a first vaporisation zone to produce, with or without the addition of heat, a first vapour fraction comprising at least a portion of the ester derivative in the liquid carbonylation reaction composition and a first liquid fraction comprising the remainder of the ester derivative in the liquid carbonylation reaction composition, at least a portion of the carboxylic acid product and the iridium carbonylation catalyst, and maintaining a concentration of water of at least 0.5% by weight in the first liquid fraction and (b) passing the first liquid fraction to a second vapourisation zone wherein the first liquid fraction is subjected to a vapourisation, with or without the addition of heat, to produce a second vapour fraction comprising carboxylic acid carbonylation product and a second liquid fraction comprising iridium carbonylation catalyst and maintaining in the second liquid fraction a concentration of water of at least 0.5% by weight.
Claim 10
Dependent Claim
23 words
A process as claimed in claim 9 in which carboxylic acid carbonylation product is recovered from said second vapour fraction by fractional distillation.
Claim 11
Dependent Claim
24 words
A process as claimed in claim 10 in which said recovered carboxylic acid carbonylation product is further purified to remove water and trace impurities.
Claim 12
Dependent Claim
15 words
A process as claimed in claim 11 in which said carboxylic acid comprises acetic acid.
Claim 13
Dependent Claim
19 words
A process as claimed in claim 9 in which said first vapouristion zone comprises an adiabatic flash vapourisation zone.
Claim 14
Dependent Claim
23 words
A process as claimed in any one of claims 9 to 13 in which said second vapourisation zone comprises a fractional distillation zone.
Claim 15
Dependent Claim
28 words
A process as claimed in any of claims 9 to 13 in which said second vapourisation zone comprises a partial vapourisation zone with means for addition of heat.
References Cited (Backward Citations)
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