PURIFICATION OF 2-PYRROLIDONE
Document Type and Number:
Japanese Patent JP05155851
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.
June 22, 1993
December 03, 1991
C07D207/26; C07D207/00; (IPC1-7): C07D207/26