Process for preparing (meth)acrylates of c10-alcohol mixtures

C - Chemistry – Metallurgy – 07 – C

Patent

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Details

C07C 67/08 (2006.01) C07C 67/54 (2006.01) C07C 69/54 (2006.01) C09D 133/06 (2006.01) C09J 133/06 (2006.01)

Patent

CA 2715712

Disclosed is a method for producing (meth)acrylates of C10 alcohol mixtures by reacting (meth)acrylic acid with an isomer mixture of C10 alcohols comprising 2-propylheptanol as the main isomer and at least one of the C10 alcohols 2-propyl-4--methylhexanol, 2-propyl-5-methylhexanol, 2-isopropylheptanol, 2- isopropyl-4- methylhexanol, 2-isopropyl-5-methylhexanol, and/or 2-propyl-4,4-dimethylpentanol in the presence of at least one acid catalyst and at least one polymerization inhibitor and in the presence of a solvent forming an azeotrope along with water, removing the azeotrope by distillation and condensing the same such that the condensate is decomposed into an aqueous and an organic phase. According to said method, a) the esterification process is carried out in a reactor comprising a circulating evaporator, b) in the presence of a solvent, and c) the raw product is purified in a subsequent pure distillation process.

L'invention concerne un procédé de préparation de (méth)acrylates de mélanges d'alcools C10 par réaction d'acide (méth)acrylique avec un mélange isomérique d'alcools C10 comprenant du 2-propylheptanol comme isomère principal et au moins un des alcools C10 que sont le 2-propyl-4-méthylhexanol, le 2-propyl-5-méthylhexanol, le 2-isopropylheptanol, le 2-isopropyl-4-méthylhexanol, le 2-isopropyl-5-méthylhexanol et/ou le 2-propyl-4,4-diméthylpentanol, en présence d'au moins un catalyseur acide et d'au moins un inhibiteur de polymérisation et en présence d'un solvant formant avec l'eau un azéotrope qui est strippé et condensé, le condensat se décomposant en une phase aqueuse et une phase organique. Selon l'invention, a) l'estérification est mise en oeuvre dans un réacteur équipé d'un évaporateur à circulation et b) en présence d'un solvant et c) le produit brut est ensuite purifié par distillation pure.

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