Union Carbide Chemicals & Plastics Technology Corporation

Union Carbide Corporation

Thomas James McNeil

Mark Gregory Goode

Thomas Edward Spriggs

Kevin Joseph Cann

Kiu H Lee

Fathi David Hussein

John Roberts Parrish

Clark Curtis Williams

Ivan Jeremy Hartley

William D Heitz

Paul T Daniell

Daniel M Hasenberg

August Joseph Boldt

Addition of water to a gas phase olefin polymerization reactor in amounts greater than 3 ppmv permits an increase in the level of condensable gas and facilitates operation of the reactor at an elevated dew point by ameliorating electrostatic phenomena in the reactor; the process inhibits sheeting.

Static control in olefin polymerization

An improved method of bed temperature control is provided by the coordinated manipulation of the water flow rate in one or more heat exchangers and cycle gas flow rate to the reactor.

Method of fluidized bed temperature control

A process comprising continuously contacting with a catalyst, under polymerization conditions, ethylene or a mixture comprising ethylene and one or more alpha-olefins in a first fluidized bed reactor and a mixture comprising ethylene and one or more alpha-olefins in a second fluidized bed reactor, the first and second reactors being connected in series, said catalyst comprising:

High density, high molecular weight polyethylene

A method for reducing sheeting during polymerization of alpha-olefins by feeding either a positive charge generating or negative charge generating chemical additive to the reactor responsive to particular static levels in the reactor. The chemical additive is added in amounts which neutralize the charges in the reactor.

Method for reducing sheeting during polymerization of alpha-olefins

Growing community of inventors

Hurricane, WV, United States of America

Thomas James McNeil