Patent ID: 6346650
Filing Date: 2002-02-12
Classification: C07C

Abstract:
A process for manufacturing a high-purity (meth)acrylic anhydride, represented by the general formula (I): in which:R1 represents H or CH3; and R2 represents an alkyl, alkenyl, aryl, alkaryl or aralkyl residue, according to which process an alkali metal (meth)acrylate of general formula (II): in which:R1 is as defined above; and M is an alkali metal, is reacted with a chloroformate of general formula (III): in which R2 is as defined above, characterized in that the said reaction is carried out in an aqueous medium and in the absence of amines, the chloroformate (III)/alkali metal (meth)acrylate (II) molar ratio being at least equal to 1.15.