Process for the production of dimethylesters of dicarboxylic...

C - Chemistry – Metallurgy – 07 – C

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C07C 67/08 (2006.01) C07C 69/60 (2006.01) C07C 69/80 (2006.01)

Patent

CA 2293630

An improved process for the production of dimethylesters by reacting dicarboxylic acids or anhydrides, typically maleic anhydride or phthalic anhydrides, with methanol. The process uses an alkylbenzene sulfonic acid with an alkyl radical containing from 8 to 16 carbon atoms, preferably from 10 to 13 carbon atoms as esterification catalyst.

L'invention concerne un procédé perfectionné de production de diméthylesters, consistant à faire réagir des acides ou anhydrides dicarboxyliques, notamment de l'anhydride maléique ou des anhydrides phtaliques, avec du méthanol. Dans ce procédé, on utilise un acide sulfonique d'alkylbenzène présentant un radical alkyle contenant 8 à 16 atomes de carbone, de préférence 10 à 13 atomes de carbone, en tant que catalyseur d'estérification.

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