Rhodium/inorganic iodide catalyst system for methanol...

Details Rhodium/inorganic iodide catalyst system for methanol... Rhodium/inorganic iodide catalyst system for methanol...

C - Chemistry, Metallurgy

07

C

C07C 51/12 (2006.01) C07C 53/08 (2006.01)

Patent

CA 2391720

The method of the present invention provides an improvement over prior art methanol carbonylation methods which substantially reduces the production of carbonyl impurities. The production of carbonyl impurities, particularly acetaldehyde, crotonaldehyde, and 2-ethyl crotonaldehyde, in methanol carbonylation reactions has been found to decrease by maintaining about 5 wt % or less methyl iodide in the reaction medium during the course of the reaction.

L'invention concerne un procédé permettant d'améliorer, par rapport à ce qui était connu dans ce domaine, les procédés de carbonylation de méthanol. Ce nouveau procédé permet de réduire considérablement la production d'impuretés de carbonyle. Cette production d'impuretés de carbonyle, et tout particulièrement d'acétaldéhyde, de crotonaldéhyde, et de 2-éthyl crotonaldéhyde, dans les réactions de carbonylation de méthanol, a été réduite en conservant environ, en pourcentage de poids, 5 % ou moins de iodure de méthyle, dans le support de réaction au cours de la réaction.

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