Method of treating an aqueous solution of acrylamide
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsShiro Asano, Kiyotaka Yoshimura, Masao Hashimoto
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Abstract
A method of purifying an aqueous solution of acrylamide, which has been formed by reacting acrylonitrile with water in the presences of the metallic copper catalyst, and which contains cuprous ions, comprising treating said aqueous solution in a reaction zone which is substantially free of an oxygen containing gas or liquid.
Claims18
In a method of purifying an aqueous solution of acrylamide containing from 1 to 1,000 ppm of cuprous ions wherein said aqueous solution is subjected to at least one of the steps of distillation, concentration, filtration, precipitation, treatment with active carbon, crystallization and ion-exchange treatment, the improvement wherein at least one of said steps is preformed in a manner that said aqueous solution does not come in contact with an oxygen containing gas or liquid.
Dependencies are inferred from the claim text.