Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1995-02-23
1996-07-09
Kumar, Shailendra
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
564126, 564128, C07C23106
Patent
active
055346553
ABSTRACT:
A process for preparing acrylamide is disclosed herein which comprises subjecting acrylonitrile to a hydration reaction in the presence of a copper-based catalyst, said process comprising the step of allowing a compound having an active methylene group and an acidic group in one molecule or a salt of the compound, for example, malonic acid, cyanoacetic acid or its salt to be present in a reaction system. According to the hydration reaction, it is possible to inhibit the secondary formation of impurities which cannot be heretofore removed, without any deterioration of a catalyst activity, and acrylamide can be obtained which is useful as a material for the manufacture of a high-molecular weight flocculant having a sufficiently large molecular weight and a good water solubility.
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Chemical Abstracts, vol. 83, No. 16, Abstract No. 132340j, H. Oogiri et al, "Polyacrylamides", p. 30, column 2, 1979-JP-A-7567190 Abstract.
Chemical Abstracts, vol. 91, No. 16, Abstract No. 124204t, Y. Kageyama et al, "Acrylamide", p. 16, column 1, 1979-JP-A-7973727 Abstract.
Chemical Abstracts, vol. 91, No. 16, Abstract No. 124198u, Y. Kageyama et al, "Acrylamide", p. 15, column 2, 1979-JP-A-7966618 Abstract.
Abe Takeya
Asao Koichi
Kambara Yoshihiko
Uehara Yoshikazu
Kumar Shailendra
Mitsui Toatsu Chemicals Inc.
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