Union Carbide Chemicals & Plastics Technology Corporation

Union Carbide Chemicals & Plastics Technology Corporaton

Gyung-Ho Song

Kiu H Lee

Fathi David Hussein

Aaron S Rhee

Henry B Hinckley

Gerald R Lowder

A method for reducing sheeting during polymerization of alpha-olefins in a fluidized bed employing catalysts prone to cause sheeting which comprises feeding a material carrying a static electric charge opposite to the static charge in said bed, said opposite charge of said material being generated by passing said material in contact with a surface adapted to impart said static electric charge to said material opposite the charge existing in said bed.

Method for reducing sheeting during polymerization of .alpha.-olefins

A method for reducing sheeting during polymerization of an alpha-olefin by feeding either a positive charge generating (MgO, ZnO, Al.sub.2 O.sub.3, CuO, and mixtures thereof) or a negative charge generating (V.sub.2 O.sub.5, SiO.sub.2, TiO.sub.2, Fe.sub.2 O.sub.3, and mixtures thereof) inorganic chemical additive to the reactor responsive to particular static levels in the reactor. The chemical additive is added in amounts which substantially neutralizes the electrostatic charge in the reactor.

Method for reducing sheeting and static charges during polymerization of

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Charleston, WV, United States of America

Gyung-Ho Song