Process for the improved production of (meth) acrylic acid...

C - Chemistry – Metallurgy – 07 – C

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260/481.9

C07C 67/08 (2006.01) C07C 69/54 (2006.01) C08G 65/332 (2006.01)

Patent

CA 2006431

ABSTRACT OF THE DISCLOSURE A process for the production of (meth)acrylic acid esters of polyhydric alcohols by reaction of the reactants with acrylic acid and/or methacrylic acid in the presence of acidic esterification catalysts with addition of steric- ally hindered phenolic compounds as polymerization inhibitors. Tocopherols are used as the sterically hindered phenolic compounds and .alpha.-tocopherol is preferably at least partly used. The process is preferably carried out using reaction mixtures which are liquid at room temperature and which are at least substantially free from solvents and/or azeotropic entraining agents. The water of condensation formed is removed from the gas phase of the reaction zone.

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