Title:
PURIFICATION OF 2-PYRROLIDONE
Document Type and Number:
Japanese Patent JP05155851
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:
JP1991000357365
Publication Date:
June 22, 1993
Filing Date:
December 03, 1991
Export Citation:
Assignee:
UBE IND LTD
International Classes:
C07D207/26; C07D207/00; (IPC1-7): C07D207/26