Exxonmobil Chemical Patents Inc.

Shiaw Tzuu Ju

James Charles Vizzini

Ted Alexander Powell

Anthony Nicholas Speca

Terry John Burkhardt

Lawrence Carl Smith

Stephen L Robertson

Disclosed is a method for reducing fouling in an apparatus and process for separating polyolefin from a slurry in a slurry polymerization reactor system comprising contacting in a reactor at a pressure of at least 2000 kPa a catalyst composition and &#x3b1;-olefin monomers to form a polyolefin reaction mixture; transferring the polyolefin reaction mixture to a high pressure separator, wherein the pressure in the high pressure separator is within the range of from 200 to 2500 kPa; and contacting the polyolefin reaction mixture with an organic amine prior to its entering the high pressure separator.

Olefin polymerization process

A polymerization process is provided. For example, a polymerization process is described, including providing a catalyst slurry having a metallocene catalyst and a first oil, providing a transport medium including a second oil and combining the transport medium and the catalyst slurry to form a catalyst mixture. The process may further include introducing the catalyst mixture to a polymerization reactor and contacting olefin monomers with the catalyst mixture to polymerize the olefin monomers and form polyolefins.

Methods of delivering catalyst systems for propylene polymerization

A polymerization process is provided. For example, a polymerization process is described, including contacting olefin monomers with a supported metallocene catalyst to polymerize the olefin monomers and form a product mixture that includes polyolefins macromers or polymers, unreacted or partially reacted olefin monomers, alcohols and organohalides. The polymerization process further includes removing a portion of the product mixture to form a recycle stream and passing the recycle stream through a removal device comprising zeolite particles having pore size of from 6 to 16 &#x212b; to transfer at least a portion of the alcohols and organohalides from the recycle stream to the removal device providing a purified recycle stream having alcohols and organohalides in an amount of 1 ppm or less. The polymerization process may further include contacting at least a portion of the purified recycle stream with the supported metallocene catalyst to form polyolefins.

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Bellaire, TX, United States of America

Shiaw Tzuu Ju