William G Depierri

US Patent:

53960211, Mar 7, 1995

Filed:

Sep 23, 1992

Appl. No.:

7/949657

Inventors:

William G. DePierri - Baton Rouge LA
Michael F. McDonald - Greenwell Springs LA
Albert E. Schweizer - Baton Rouge LA

Assignee:

Exxon Chemical Products Inc. - Linden NJ

International Classification:

C07C 713

US Classification:

585826

Abstract:

A process for reducing the loss of monomers from a polymerization recycle stream comprising steam treating a molecular sieve used to dry the recycle stream to remove acidic sites within the sieve. The steam treatment is conducted at a temperature of between 150. degree. C. and 300. degree. C. for 2 to 24 hours.