Chevron Phillips Chemical Company LP

Phillips Petroleum Company

Charles R Nease

Max P McDaniel

Elizabeth Ann Benham

Ted H Cymbaluk

H Kenneth Staffin

Thomas R Parr

Charles K Newsome

John P Hogan

John D Stewart

Lonnie J Dodson

Max P Mcdaniel

Elizabeth A Benham

A method comprising contacting an olefin in the presence of a catalyst and a melt index modifier (MIM) under conditions suitable to form a polyolefin and recovering the polyolefin, wherein the polyolefin melt index is increased by at least about 25%, wherein the normalized catalyst activity is decreased by less than about 10%, and wherein the MIM is characterized by the general formula R&#x2014;HC&#x2550;CH&#x2014;Ror RRC&#x2550;CHwhere R, R, R, Rare each selected from the group consisting of a non-aromatic organyl group.

Process of melt index control

Methods and systems for preparing catalyst, such as chromium catalysts, are provided. The valence of at least a portion of the catalyst sent to an activator is changed from Cr(III) to Cr(VI). The catalyst is prepared or activated continuously using a fluidization bed catalyst activator.

Continuous catalyst activator

A process to control the heat transfer coefficient in slurry olefin polymerization processes comprising shocking the polymerization reactor is provided. This shock comprises quickly decreasing and then restoring to normal operating conditions, the higher alpha-olefin comonomer to ethylene monomer weight feed ratio.

Ethylene polymerization processes and products thereof

A process has been discovered for the polymerization of ethylene and mixtures of ethylene with at least one other mono-1-olefin by employing a polymerization catalyst that produces polymers containing terminal vinyl unsaturation wherein such catalyst is exposed to a modifying agent prior to or during the polymerization reaction.

Ethylene homopolymer and copolymer polymerization process and the

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Kingwood, TX, United States of America

Charles R Nease