Victoria Sue Graves

US Patent:

45783730, Mar 25, 1986

Filed:

Sep 4, 1984

Appl. No.:

6/647323

Inventors:

Victoria Graves - Crosby TX

Assignee:

Exxon Research & Engineering Co. - Florham Park NJ

International Classification:

C08F 464

US Classification:

502113

Abstract:

An olefin polymerization catalyst system comprising (I) a polymerization catalyst produced by treating an inert support material, preferably a hydrated high surface area silica support having 1. 00 to 1. 50 hydroxyls per gram of silica with the reaction product of an organomagnesium compound and first a zirconium compound and/or a hafnium compound then a halogenator and tetravalent titanium compound, (II) an organoaluminum compound cocatalyst and (III) a chlorinated hydrocarbon promoter which produces polymers having broad molecular weight distribution in high yields.

US Patent:

45621705, Dec 31, 1985

Filed:

Sep 4, 1984

Appl. No.:

6/647322

Inventors:

Victoria Graves - Crosby TX

Assignee:

Exxon Research & Engineering Co. - Florham Park NJ

International Classification:

C08F 464

US Classification:

502113

Abstract:

An olefin polymerization catalyst produced by treating a inert porous support material preferably a hydrated high surface area silica support having 1. 00 to 1. 50 hydroxyls per gram of silica with the reaction product of an organomagnesium compound and first a hafnium compound then a halogenator and tetravalent titanium compound, which when used as a cocatalyst with an organoaluminum compound produces polymers having broad molecular weight distribution.

US Patent:

45542651, Nov 19, 1985

Filed:

Jun 29, 1984

Appl. No.:

6/626172

Inventors:

Victoria Graves - Crosby TX

Assignee:

Exxon Research & Engineering Co. - Florham Park NJ

International Classification:

C08F 464

US Classification:

502113

Abstract:

An olefin polymerization catalyst produced by treating an inert support material, preferably a hydrated high surface area silica support having 1. 00 to 1. 50 hydroxyls per gram of silica with the reaction product of an organomagnesium compound and first a zirconium compound then a halogenator and tetravalent titanium compound, which when used as a cocatalyst with an organoaluminum compound produces polymers having broad molecular weight distribution.

US Patent:

46652620, May 12, 1987

Filed:

Oct 18, 1985

Appl. No.:

6/788906

Inventors:

Victoria Graves - Crosby TX

Assignee:

Exxon Research & Engineering Co. - Florham Park NJ

International Classification:

C07C 230

US Classification:

585512

Abstract:

An olefin polymerization catalyst system comprising (I) a polymerization catalyst produced by treating an inert support material, preferably a hydrated high surface area silica support having 1. 00 to 1. 50 hydroxyls per gram of silica with the reaction product of an organomagnesium compound and first a zirconium compound and/or a hafnium compound then a halogenator and tetravalent titanium compound, (II) an organoaluminum compound cocatalyst and (III) a chlorinated hydrocarbon promoter which produces polymers having broad molecular weight distribution in high yields.

US Patent:

46186603, Oct 21, 1986

Filed:

Aug 30, 1985

Appl. No.:

6/771393

Inventors:

Victoria Graves - Crosby TX

Assignee:

Exxon Research & Engineering Co. - Florham Park NJ

International Classification:

C08F 464

US Classification:

526114

Abstract:

An olefin polymerization catalyst produced by treating an inert support material, preferably a hydrated high surface area silica support having 1. 00 to 1. 50 hydroxyls per gram of silica with the reaction product of an organomagnesium compound and first a zirconium compound then a halogenator and tetravalent titanium compound, which when used as a cocatalyst with an organoaluminum compound produces polymers having broad molecular weight distribution.

US Patent:

45671532, Jan 28, 1986

Filed:

Aug 13, 1984

Appl. No.:

6/639879

Inventors:

Victoria Graves - Crosby TX

Assignee:

Exxon Research & Engineering Co. - Florham Park NJ

International Classification:

C08F 472
C08F 464

US Classification:

502113

Abstract:

An olefin polymerization catalyst produced by copulverizing a magnesium compound and a scandium halide, such as magnesium chloride and scandium chloride which is thereafter treated with one or more Group 4b or 5b transition metal compounds, which when used as a cocatalyst with an organoaluminum compound produces polymers in higher yields than magnesium compounds copulverized with organic esters as previously practiced and having broad molecular weight distribution.

US Patent:

45687307, Feb 4, 1986

Filed:

Aug 13, 1984

Appl. No.:

6/639658

Inventors:

Victoria Graves - Crosby TX

Assignee:

Exxon Research & Engineering Co. - Florham Park NJ

International Classification:

C08F 402
C08F 1000

US Classification:

526159

Abstract:

An olefin polymerization catalyst component produced by impregnating polyethylene with a pulverized solid olefin polymerization catalyst containing a Group 4b or 5b transition metal, for example a pulverized magnesium chloride containing titanium is impregnated in low molecular weight polyethylene by copulvering, then subjecting the impregnated polymer particles to shear in an inert medium at about the softening point of the polyethylene, which when used as a cocatalyst with an organoaluminum compound produces polymers of improved morphology having a more regular shape and higher bulk density than pulverized catalyst alone.