Univation Technologies, LLC

Exxon Chemical Patents, Inc.

Hoechst Gmbh

Hoechst Aktiengesellschaft

Exxonmobil Chemical Patents Inc.

Kathryn Ann Russell

Agapios Kyriacos Agapiou

Anthony Nicholas Speca

Jeffrey Lawrence Brinen

Kelly Tormaschy

Robert Olds Hagerty

Michael E Muhle

Richard B Pannell

F David Hussein

Robert Lynn Santana

X Simon Zhang

Processes for transitioning among polymerization catalyst systems, preferably catalyst systems that are incompatible with each other. In particular, the processes relate to transitioning from olefin polymerizations utilizing metallocene catalyst systems to olefin polymerizations utilizing traditional Ziegler-Natta catalyst systems.

Processes for transitioning between metallocene and Ziegler-Natta polymerization catalysts

The present invention relates to an improved catalyst delivery method for introducing a supported bulky ligand metallocene-type catalyst system to a reactor for polymerizing one or more olefin(s). In particular, the invention provides for a method of introducing a supported metallocene-type catalyst system into a polymerization reactor by and in the presence of a carrier solution of an antistatic agent and a liquid diluent. Also, the invention is directed toward a catalyst feeder for use in a polymerization process.

Catalyst delivery method, a catalyst feeder and their use in a polymerization process

Catalyst systems and methods for supporting catalysts and their components, particularly metallocene catalyst components, are provided. The method involves techniques for evenly distributing a small volume of catalyst component over and among a porous support material. Such even distribution is thought to result in reduced fouling.

Method for making supported catalyst systems and catalyst systems

Catalyst systems and methods for supporting catalysts and their components, particularly metallocene catalyst components, are provided. The method involves teqhniques for evenly distributing a small volume of catalyst component over and among a porous support material. Such even distribution is thought to result in reduced fouling.

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Seabrook, TX, United States of America

Kathryn Ann Russell