Title:
PURIFICATION OF 2-PYRROLIDONE
Document Type and Number:
Japanese Patent JPH05155851
Kind Code:
A
Abstract:
PURPOSE: To provide purified 2-pyrrolidone for obtaining a high-viscosity 2- pyrrolidone polymer in high yield.
CONSTITUTION: The objective purification can be accomplished by adding sulfuric acid or hydrochloric acid to 2-pyrrolidone followed by vacuum distillation.
Inventors:
NISHIYAMA MASAO
OTSUKI KAORU
MIWA YOSHIYUKI
OTSUKI KAORU
MIWA YOSHIYUKI
Application Number:
JP35736591A
Publication Date:
June 22, 1993
Filing Date:
December 03, 1991
Export Citation:
Assignee:
UBE INDUSTRIES
International Classes:
C07D207/26; (IPC1-7): C07D207/26
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