Concentration method of aqueous acrylamide solution

Details Concentration method of aqueous acrylamide solution Concentration method of aqueous acrylamide solution

1997-04-07

1999-07-13

Kumar, Shailendra

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564126, 564127, 564128, 564204, C07C23124

Patent

active

059229128

ABSTRACT:
A method is disclosed for the concentration of an aqueous acrylamide solution prepared by hydration of acrylonitrile or an aqueous acrylamide solution substantially free of acrylonitrile. The method makes use of a concentration apparatus at least a part of whose solution-contacting section is made of a copper-containing material. The concentration is conducted while introducing an oxygen-containing gas into the apparatus. Use of this method can prevent formation, adhering, accumulation and the like of popcorn polymers inside the concentration apparatus upon concentration of the aqueous acrylamide solution, and can also produce high-quality acrylamide.

REFERENCES:
patent: 3917693 (1975-11-01), Asano et al.
patent: 3923741 (1975-12-01), Asano et al.
patent: 3941837 (1976-03-01), Asano et al.

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