Preparation of acrylic acid and esters

Details Preparation of acrylic acid and esters Preparation of acrylic acid and esters

C - Chemistry, Metallurgy

07

C

C07C 57/05 (2006.01) C07C 51/21 (2006.01) C07C 51/43 (2006.01) C07C 67/08 (2006.01) C07C 69/54 (2006.01)

Patent

CA 2194900

A process for preparing acrylic acid and/or esters comprises the steps of: (a) catalytic gas phase oxidation of propene and/or acrolein to acrylic acid to obtain a gaseous reaction product comprising acrylic acid, (b) solvent absorption of the reaction product, (c) distillation of the solvent loaded with acrylic acid to obtain a crude acrylic acid and the solvent, (d) purification of the crude acrylic acid by crystallization and (e) optionally esterification of the crystalline acrylic acid.

Procédé de préparation de l»acide acrylique ou d»esters de cet acide comportant les étapes suivantes : a) oxydation catalytique en phase gazeuse de propène et (ou) d»acroléïne en acide acrylique de façon à obtenir un produit de réaction gazeux comportant de l»acide acrylique, b) l»absorption du produit de réaction dans un solvant, c) la distillation du solvant chargé d»acide acrylique de façon à obtenir un mélange d»acide acrylique et de solvant, d) la purification par cristallisation de l»acide acrylique brut et e) l»estérification facultative de l»acide acrylique cristallin.

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