Patent ID: 6084122
Filing Date: 2000-07-04
Classification: C07C

Abstract:
A process for the removal of sulfur from an acrylate waste stream comprising:(a) contacting in a reactor (meth)acrylic acid with an alcohol in the presence of an acid catalyst to form a reaction mixture containing the corresponding ester reaction product and residue byproducts;(b) removing the reaction product from the reaction mixture;(c) directing the residue of the reaction mixture containing the acid catalyst, heavy end oligomers formed during the reaction to an evaporator;(d) directing the residue of (c) to an extractor and contacting with water to form a two phase system comprising as phase (1) acid catalyst/water, and as phase (2) heavy end oligomers; and,(e) recycling phase (1) of (d) containing acid catalyst to the reactor of (a).