Title:
METHOD FOR PURIFYING N-VINYL-2-PYRROLIDONE
Document Type and Number:
Japanese Patent JP2004345994
Kind Code:
A
Abstract:
To improve purification yield of NVP (N-vinyl-2-pyrrolidone) in a method for purifying NVP by crystallization.
The method for purifying N-vinyl-2-pyrrolidone by crystallization comprises carrying out crystallization by making a stabilizer exist in a mother liquor composed of N-vinyl-2-pyrrolidone as a main component and containing impurities.
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Inventors:
SUGIURA HIDETO
YANO HITOSHI
YANO HITOSHI
Application Number:
JP2003143731A
Publication Date:
December 09, 2004
Filing Date:
May 21, 2003
Export Citation:
Assignee:
NIPPON CATALYTIC CHEM IND
International Classes:
C07D201/16; C07D207/267; C07D207/26; (IPC1-7): C07D207/267
Attorney, Agent or Firm:
Mikio Hatta
Yasuo Nara
Etsuko Saito
Katsuyuki Utani
Toshifumi Fujii
Yasuo Nara
Etsuko Saito
Katsuyuki Utani
Toshifumi Fujii