Union Carbide Corporation

Union Carbide Chemicals & Plastics Technology Corporation

Billy Jack Garner

Mark Gregory Goode

John Roberts Parrish

Mark Williams Blood

Roger B Painter

Robert Darrell Olson

Timothy Joseph Howley

Gyung-Ho Song

William B Brod

Ralph Niels Hesson

Frederick W Jacob

Robert W Bobst

Thomas Walter Pilgrim

The liquid content of granular product removed from a fluidized bed polymerization reactor operating in the condensing mode is reduced or minimized by removing the product from a level in the fluidized bed which is about 0.21 to about 0.59 of its height while venting the product discharge tank to a point higher in the fluidized bed.

Dry product discharge from a gas phase polymerization reactor operating in the condensing mode

An improved method for polymerizing one or more polyolefins in the presence of a transition metal catalyst in at least one gas phase reactor having an expanded section, the improvement comprising generating a tangential flow of gas or gas-solids in the expanded section of the gas phase reactor to reduce fines entrainment into the gas cycle system and to reduce or remove solid particle build-up on one or more interior surfaces of the expanded section of the reactor.

Gas phase fluidized bed polyolefin polymerization process using gas or

A method for removing unpolymerized gaseous monomers from a solid olefin polymer in a single purge vessel while deactivating Ziegler-Natta catalysts and organometallic catalyst residues present in said solid olefin polymer by utilizing a two diameter purge vessel wherein hydrolysis of the catalysts are effected in the portion of the reactor having the smaller diameter with the gaseous monomers being removed in the larger diameter portion.

Method for treating resin in a purge vessel

A degassing or purging process is disclosed for the removal of unpolymerized gaseous monomers from solid olefin polymers. The disclosed process comprises conveying the solid polymer, e.g. in granular form, to the top of a purge vessel by means of an inert gas stream, feeding an inert gas stream to the bottom of the purge vessel and countercurrently contacting the solid polymer with the inert gas purge stream to strip away the gaseous monomers evolved from the solid polymer, and recycling a portion of the resulting stream to the purge vessel. In one embodiment, the recycle serves as the conveying gas and in another embodiment as the purge stream. The process is especially useful in purging gaseous unpolymerized hydrocarbon monomers from low pressure-polymerized, low density ethylene-hydrocarbon copolymers.

Degassing process for removing unpolymerized monomers from olefin

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Charleston, WV, United States of America

Billy Jack Garner