Mitsui Toatsu Chemicals, Incorporated

Kiyotaka Yoshimura

Shiro Asano

Tadatoshi Honda

Masao Hashimoto

Nobuyoshi Hashimoto

Ryozi Tsuchiya

Ryoji Tsuchiya

An improved process for converting acrylonitrile to the corresponding amide by hydrating said nitrile in the presence of a metallic copper catalyst and aluminum nitrate as promoter for said catalyst.

Process for manufacturing an amide compound using aluminum nitrate

A method for economically concentrating an acrylamide aqueous solution by catalytic hydration without substantial deterioration in the product. According to the method, an acrylamide aqueous solution obtained from catalytic hydration, is concentrated by distillation while maintaining the solution in good contact with at least 0.1 mole. or more of air per mole of water distilled from the acrylamide aqueous solution.

Method for concentrating an acrylamide aqueous solution

A process for continuously manufacturing acrylamide by hydrating acrylonitrile in the presence of a free metallic copper catalyst, characterized in that a reactor is employed, which is internally partitioned into a catalyst slurry circulating section and a catalyst precipitating section, and that raw materials and supplementary catalyst are supplied continuously into the reactor and at the same time the clear reaction liquid and a portion of the catalyst are continuously taken out of the reactor so that the properties of the catalyst are maintained constant.

Process for continuously manufacturing acrylamide

An improved process for preparing acrylamide or methacrylamide which process comprises the step of reacting acrylonitrile or methacrylonitrile with water in the presence of a catalyst system consisting of a metallic copper containing catalyst and a copper salt promoter, said copper salt being copper sulfate, copper nitrate, copper halide, or a copper salt of a lower fatty acid.

Process for the production of acrylamide and methacrylamide

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.

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Mobara, Japan

Kiyotaka Yoshimura