Vapour phase ester synthesis

C - Chemistry – Metallurgy – 07 – C

Patent

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C07C 67/04 (2006.01) C07C 69/14 (2006.01)

Patent

CA 2337034

This invention relates to a process for the production of lower aliphatic esters which comprises reacting a lower olefin with a saturated lower aliphatic monocarboxylic acid in the vapour phase in the presence of a heteropolyacid catalyst, characterised in that: a) the reaction is carried out in a plurality of reactors set up in series; and b) the feedstock is rendered substantially free of metallic or metal compound impurities prior to being brought into contact with the heteropolyacid catalyst.

L'invention concerne un procédé relatif à la production d'esters aliphatiques inférieurs, qui consiste à faire réagir une oléfine inférieure avec un acide monocarboxylique aliphatique inférieur saturé en phase vapeur, le système réactif comprenant un catalyseur hétéropolyacide. Le procédé est caractérisé en ce que a) la réaction est conduite dans plusieurs réacteurs disposés en série, et b) la charge est sensiblement dépourvue d'impuretés métalliques ou à base de composés métalliques, avant le contact avec le catalyseur susmentionné.

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