CONTINUOUS PRODUCTION OF ACETIC ACID AND\OR METHYLACETATE Russian patent published in 2006 - IPC C07C51/12 C07C53/08 

Abstract RU 2275352 C2

FIELD: chemical technology.

SUBSTANCE: invention relates to continuous method for production of acetic acid and/or methyl acetate based on known process of methanol or derivatives thereof (such as dimethyl ether, halogenated methyl or methyl acetate) carbonylation. Process is carried out in homogenous liquid phase under carbon monoxide pressure in presence of catalytic system containing rhodium-based homogeneous catalyst and halogenated promoter, in presence of water in reaction medium and in amount of not less than 14 mass %. In continuous process homogeneous catalyst composition is gradually changed by continuous or discontinuous addition of any iridium compound. Catalyst composition is transformed without process shutdown by transition from rhodium-based catalyst to rhodium/iridium-based catalyst or iridium-based catalyst. Iridium addition makes it possible to decrease water content in reaction system.

EFFECT: modified industrial process of methanol carbonylation by transformation of catalytic system.

19 cl, 7 tbl

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RU 2 275 352 C2

Authors

Serp Filipp Zhil'

Tibo Daniehl' Marsel'

Marshan Daniehl' Anri

Kal'K Filipp Zhozef

Le Berr Karol' Mari

Dates

2006-04-27Published

2002-02-05Filed