Process for the preparation of an alkyl methacrylate

Details Process for the preparation of an alkyl methacrylate Process for the preparation of an alkyl methacrylate

C - Chemistry, Metallurgy

07

C

260/482.5

C07C 67/38 (2006.01) C07C 69/54 (2006.01)

Patent

CA 2014152

A process for the preparation of an alkyl methacrylate, which comprises: a) selectively removing propadiene from a C3-mixture comprising a mixture of propyne and propadiene that has been obtained from an ethene cracker, a catalytic cracker or an LPG-dehydrogenation process, to afford a propyne feed in which the ratio of propyne to propadiene is ~ 6, and b) contacting the propyne feed with carbon monoxide and an alkanol in the presence of a carboxylation catalyst.

Méthode de préparation d'un méthacrylate d'alkyle, consistant à : a) éliminer sélectivement le propadiène d'un mélange en C3, soit du propyne et du propadiène provenant d'un craqueur d'éthène, d'un craqueur catalytique ou d'un procédé de déshydrogénation de GPL, de façon à obtenir une alimentation de propyne, avec un rapport propyne/propadiène de ~ 6; b) mettre en contact l'alimentation de propyne avec du monoxyde de carbone et un alcanol en présence d'un catalyseur de carboxylation.

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