Production method of N-vinyl-2-pyrrolidone

• Main Authors: OKA YOSHIHISA, SUGIURA HIDETO, NOZAKI SHIGEYUKI, INAOKA TORU
• Format: Patent
• Language: English
• Published: 04.08.2015
• Subjects: CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

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-pyrroli...