Nova Chemicals (international) S.a.

Nova Chemicals Inc.

Nova Chemicals S.a.

Isam Jaber

Qinyan Wang

Stephen John Brown

Mohamed Aiffa

Amy Baltimore

Steven Clemens

Holly Ann Severin

Lawrence Martin Josef Van Asseldonk

Perry Dewit

Helena Ouskine

Stephen Salomons

Darryl Morrison

Xiaoliang Gao

P Scott Chisholm

Charles Ashton Garret Carter

Eric Clavelle

Yves Lacombe

Kamal Elias Serhal

Andrzej Z Krzywicki

Ian Ronald Jobe

Vernon Lindsay Strom

Russell Kirk Archer

Dale Alexander Sieben

Oleksiy Golovchenko

Keith WAyne Besenski

Mackenzie Alexander Harris

Anita Sylvia Magis

Michel Berghmans

Lawrence Van Asseldonk

Holly Severin

Lawrence Martin Van Asseldonk

Darryl J Morrison

Andrzej Krzywicki

Charles Ashton Carter

The various embodiments of the invention provide, a magnesium titanium polymerization procatalyst, methods for making and using the same.

Ziegler-Natta catalyst for high temperature polymerization

By controlling the ratio of catalyst components or the type of activator the homogeneity of a polymer produced using a single site catalyst may be improved.

Catalyst modification to control polymer architecture

The oligomerization of ethylene using a chromium catalyst having a heteroatomic ligand may be used to provide oligomerization products that are selective towards hexene and/or octene. However, such processes also typically produce some polymer as an undesirable by product. The present invention is directed towards improvements in the selective oligomerization of ethylene.

Heat management in ethylene oligomerization

A catalyst system comprising (i) a bulky ligand catalyst compound; and (ii) a novel borate activator is active for olefin polymerization. The novel borate contains at least one chelating (divalent) ligand and contains at least one fluorine atom. Preferred borate activators are provided as anilinium or carbonium salts. Highly preferred borate salts contain two perfluorinated alkoxy chelating ligands. The catalyst system may be used to produce polyethylene for 'end use' applications such as polyethylene film and molded polyethylene goods.

Borate activator

The present invention provides a Ziegler-Natta catalyst useful in solution processes for the polymerization of olefins having a low amount of aluminum and magnesium. The catalysts of the present invention contain an alkyl silanol and have a molar ratio of Si:Ti from 0.25:1 to 4:1. The catalysts are effective for the solution polymerization of olefins at high temperatures.

High temperature ziegler-natta solution catalysts

The present invention provides a Ziegler-Natta catalyst useful in solution processes for the polymerization of olefins having a low amount of aluminum and magnesium. The catalysts of the present invention have a molar ratio of magnesium to the first aluminum component from 4.0:1 to 5.5:1 and molar ratio of magnesium to transition metal from 4.0:1 to 5.5:1.

Low aluminum and magnesium Z-N solution catalysts

A dual reactor process for the solution and (co)polymerization of ethylene uses two different types of catalysts in the two reactors. A catalyst having a phosphinimine ligand is used in the first reactor. A Ziegler Natta catalyst is used in the second reactor. The process of this invention is comparatively easy to control and may be used to produce polyethylene products having a broad molecular weight distribution. Linear low density produced according to this invention is well suited for the manufacture of molded goods and plastic films.

Dual reactor ethylene polymerization process

The present invention provides a Ziegler-Natta catalyst based on titanium and vanadium useful in solution processes for the polymerization of olefins having a low amount of aluminum and magnesium. The catalysts of the present invention have a molar ratio of magnesium to the first aluminum component from 4.0:1 to 8.0:1 and molar ratio of magnesium to titanium and vanadium from 4.0:1 to 8.0:1. The invention provides a novel catalyst preparation method to substantially increase the polymer molecular weight in the high temperature ethylene polymerization process.

Mixed titanium-vanadium catalysts for solution ethylene polymerization

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Calgary, Canada

Isam Jaber