US 6,982,337 B1
Process for making N-vinyl-2-pyrrolidone
Andrew P. Kahn, Eagleville, Pa. (US)
Assigned to Lyondell Chemical Technology, L.P., Greenville, Del. (US)
Filed on Jul. 28, 2004, as Appl. No. 10/900,963.
Int. Cl. C07D 207/267 (2006.01); A61K 31/4015 (2006.01)
U.S. Cl. 548—408 9 Claims
 
1. A process which comprises dehydrating N-(2-hydroxyethyl)-2-pyrrolidone (HEP) in the presence of a catalyst and added water to produce N-vinyl-2-pyrrolidone (NVP), wherein the water is used in an amount effective to reduce the amount of N-ethyl-2-pyrrolidone (NEP) produced compared with the amount of NEP produced in the absence of the added water.