Patent ID: 6649787
Filing Date: 2003-11-18
Classification: C07C

Abstract:
A method for preparing an (meth)acrylic acid ester comprisingan esterification step for forming the (meth)acrylic acid ester by esterification reaction between (meth)acrylic acid and the corresponding aliphatic alcohol having 1 to 4 carbon atoms in the presence of an acidic catalyst, and a separation-purification step consisting of one acid-separating column, one low boiling matter-separating column and one rectification column for separating and purifying the (meth)acrylic acid ester from the (meth)acrylic acid ester-containing mixture obtained in the esterification step, characterized in that the whole of the bottom residue of the rectification column is circulated back through the rectification column and optionally at least one of the acid-separating column &tgr; and the low boiling matter-separating column.