Keith Eric Carmichael

US Patent:

57445567, Apr 28, 1998

Filed:

Sep 13, 1996

Appl. No.:

8/712930

Inventors:

George Ernest Keller - South Charleston WV
Keith Ernest Carmichael - Charleston WV
Jean Bowman Cropley - Scott Depot WV
Eldon Ronald Larsen - Charleston WV
Mark Wilton Smale - Glen Gardner NJ
Timothy Todd Wenzel - Charleston WV
Clark Curtis Williams - Charleston WV

Assignee:

Union Carbide Chemicals & Plastics Technology Corporation - Danbury CT

International Classification:

C08F 234

US Classification:

526135

Abstract:

A process for the gas-phase polymerization of polymers which allows for the introduction of an unsupported polymerization catalyst system into the gas-phase reactor, wherein the unsupported polymerization catalyst system comprises (i) a non-volatile materials fraction containing a polymerization catalyst; (ii) a solvent fraction which is at least partially miscible with the non-volatile materials fraction and which is sufficiently volatile to allow for the formation of polymerization catalyst particles when the mixture of the solvent fraction and the non-volatile materials fraction is sprayed into the reactor; (iii) a compressed fluid; and (iv) optionally a slowly vaporizing solvent.