Production method of N-vinyl-2-pyrrolidone

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United States of America Patent

PATENT NO 9096516
APP PUB NO 20110218344A1
SERIAL NO

13109450

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A method for producing N-vinyl-2-pyrrolidone by crystallization including: controlling a water content in a feed N-vinyl-2-pyrrolidone solution at an inlet of a crystallizer so as to be not lower than 0.7% by weight and not higher than 10% by weight based on the total weight of the N-vinyl-2-pyrrolidone solution; and supplying the feed N-vinyl-2-pyrrolidone solution to a crystallization process.

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Patent Owner(s)

Patent OwnerAddress
NIPPON SHOKUBAI CO LTD1-1 KORAIBASHI 4-CHOME CHUO-KU OSAKA-SHI OSAKA 5410043 ?5410043

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Inaoka, Toru Yokohama, JP 16 157
Nozaki, Shigeyuki Yokohama, JP 3 6
Oka, Yoshihisa Chigasaki, JP 9 34
Sugiura, Hideto Kawasaki, JP 5 8

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