Process for the preparation of (meth)acrylic acid esters

Details Process for the preparation of (meth)acrylic acid esters Process for the preparation of (meth)acrylic acid esters

C - Chemistry, Metallurgy

07

D

C07D 233/32 (2006.01) C07D 239/10 (2006.01) C07D 243/04 (2006.01)

Patent

CA 2240196

A process for the production of (meth)acryl esters of the Formula I See Formula I in which R1 stands for hydrogen or a methyl group and A and B stand for unbranched or branched alkylene groups with 2 to 5 C atoms. The process comprises the step of reacting an acrylic acid ester or methacrylic acid ester of Formula II See Formula II in which R1 is as defined above and R2 stands for an alkyl radical with 1 to 4 C atoms, with a heterocyclic compound of the Formula III in a reaction mixture See Formula III wherein A and B are as defined above. The process is carried out in the presence of a catalyst system comprising calcium hydroxide, wherein the catalyst system is present in the reaction mixture in an amount of 1 ppm to 250 ppm.

L'invention concerne un procédé catalytique de production d'esters d'acide (méth)acrylique de formule (I), dans laquelle R1 représente H ou CH3, et A et B représentent des groupes alkylène ramifiés ou non, possédant 2 à 5 atomes de C. Ledit procédé consiste à faire réagir des esters d'acide (méth)acrylique de formule (II), dans laquelle R2 représente un groupe alkyle possédant en particulier 1 à 4 atomes de C, avec des alcools de formule (III), en présence d'au maximum 250 ppm de Ca(OH)2 comme catalyseur. Aprés la réaction, le catalyseur peut être séparé du mélange de réaction par filtration.

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