Polymerization catalyst system

Patent · Tue Mar 25 04:00:00 EST 1986

OSTI ID:5816828

Graves, V

This patent describes a catalyst system for polymerizing at least one alpha-olefin under conditions characteristic of Ziegler polymerization. This system consists of: 1. a supported polymerization catalyst or mixture of polymerization catalysts prepared under anhydrous conditions by the sequential steps of: (a) preparing a slurry of inert particulate porous support material; (b) adding to the slurry a solution of an organomagnesium compound; (c) adding to the slurry and reacting a solution of a zirconium halide compound, hafnium compound or mixtures thereof; (d) adding to the slurry and reacting a halogenator; (e) adding to the slurry and reacting a tetravalent titanium halide compound; and (f) recovering solid catalyst component; 2. an organoaluminum compound; and 3. a promotor of chlorinated hydrocarbons having one to 20 carbon atoms.

• Assignee: Exxon Res. and Eng. Co., Florham Park, NJ
• Patent Number(s): US 4578373
• OSTI ID: 5816828
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKALINE EARTH METAL COMPOUNDS
ALKENES
ALUMINIUM COMPOUNDS
CATALYSTS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DISPERSIONS
HAFNIUM COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
MAGNESIUM COMPOUNDS
MIXTURES
ORGANIC COMPOUNDS
PARTICLES
PARTICULATES
POLYMERIZATION
POROSITY
REFRACTORY METAL COMPOUNDS
SLURRIES
SUSPENSIONS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS