Title:
ビニル化によるN-ビニル-2-ピロリドンの製法
Document Type and Number:
Japanese Patent JP4546647
Kind Code:
B2
Abstract:
A single stage process, with recirculation of reactants, is provided herein for making N-vinylpyrrolidone or N-vinyl caprolactam at a high reaction rate and selectivity and at a predetermined conversion per pass. In this process a reaction mixture is formed by saturating a non-aqueous, liquid mixture of recirculating lactam, vinyl lactam and catalyst with acetylene at low temperatures and pressures to provide a high concentration of acetylene in the liquid, pumping the saturated solution into a reactor, reacting the mixture as a single liquid phase, cooling the reaction product, withdrawing a portion of the cooled product, recirculating the rest into the reaction mixture, and continuously feeding additional lactam and catalyst therein.
Inventors:
Anatoly alexander
Michael lake
Michael lake
Application Number:
JP2000590997A
Publication Date:
September 15, 2010
Filing Date:
October 28, 1999
Export Citation:
Assignee:
ISP INVESTMENTS INC.
International Classes:
C07D207/267; C07B61/00; C07D207/12; C07D223/10; C07D207/26
Domestic Patent References:
| JP4501252A | ||||
| JP10287646A |
Attorney, Agent or Firm:
Kosaku Sugimura