Nova Chemicals (international) S.a.

Ineos Europe Limited

Nova Chemicals Inc.

Ineos Sales Limited

Nova Chemicals S.a.

Paul Mesquita

Peter Zoricak

Victoria Ker

Peter Phung Minh Hoang

Cliff Baar

Sergio Mastroianni

Grant Berent Jacobsen

Dusan Jeremic

Ian Douglas McKay

Cliff Robert Baar

Peter Phung Hoang

Ian Mckay

The use of high activity 'Single Site' polymerization catalysts often causes the fouling of polymerization reactors. The problem is particularly acute with gas phase polymerizations. While not wishing to be bound by theory it is believed that the fouling is initiated by the buildup of static charges in the reactor. The use of anti-static agents mitigates this problem, but typical antistatic agents contain polar species, which can deactivate the polymerization catalyst. We have now discovered that the use of a porous metal oxide support allows large levels of a selected antistatic agent to be used in a manner that reduces static/fouling problems in highly active polymerization catalysts.

Supported antistatic polymerization catalyst

Properties of a polymer produced in gas phase or slurry phase using a dual catalyst such as polydispersity and comonomer incorporation, may be controlled by controlling reaction parameters such as temperature, (co)monomer pressure, hydrogen partial pressure and the presence of non-polymerizable hydrocarbon. This provides an easy method to control the bimodality of a polymer as well as comonomer incorporation.

Adjusting polymer characteristics through process control

Properties of a polymer produced using a dual catalyst on the same support, such as polydispersity and comonomer incorporation, may be controlled by controlling reaction parameters such as temperature, monomer pressure, hydrogen partial pressure and the presence of non-polymerizable hydrocarbon. This provides an easy method to control the bimodality of a polymer as well as comonomer incorporation.

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Calgary, Canada

Paul Mesquita