Process for purifying an aqueous solution of acrylamide

Details Process for purifying an aqueous solution of acrylamide Process for purifying an aqueous solution of acrylamide

C - Chemistry, Metallurgy

07

C

260/557.4

C07C 253/34 (2006.01)

Patent

CA 1184937

- 1 - TITLE OF THE INVENTION PROCESS FOR PURIFYING AN AQUEOUS SOLUTION OF ACRYLAMIDE ABSTRACT OF THE DISCLOSURE An aqueous solution of acrylamide obtained by catalytic hydration of acrylonitrile in the presence of a copper-based catalyst is purified by the steps, in sequence, of (a) removal of the unreacted acrylonitrile, (b) removal of copper, (c) treatment under basic conditions, (d) cation exchanging treatment and (e) weakly basic anion exchanging treatment. The acrylamide obtained by this process has good storage stability. An acrylamide polymer produced from this monomer is useful as a flocculant having a reduced content of the unreacted monomer, a high molecular weight and excel- lent solubility in water.

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