Polymerization catalyst
A process for polymerizing ethylene is described which comprises polymerizing ethylene, a mixture of ethylene and other alpha-olefins, or a mixture of ethylene, other alpha-olefins and/or diolefins in the presence of a catalyst system comprising a catalyst component (I) obtained by contacting silica in an inert solvent, (A) at least one organomagnesium compound, (B) at least one titanium compound represented by the formula T1X'/sub 4-q/(OR')/sub q/ wherein X' is halogen, R' is a hydrocarbyl or substituted hydrocarbyl group having from 1-20 carbon atoms, and q is 0 or a number equal to or less than 4 wherein the titanium content is in the range of about 0.02 to about 3 mmols per gram of the silica, and at any state of the contacting, (C) a sufficient amount of chlorine such that after the silica is contacted with the organomagnesium compound and the titanium compound, chlorine is available so that the activity of the catalyst is increased, and (II) an organoaluminum compound of the formula AIR''/sub n/X''/sub 3-n/ wherein R'' is hydrogen, hydrocarbyl or substituted hydrocarbyl group having 1 to 20 carbon atoms, X is a halogen and n is a number from 1 to 3; and recovering ethylene polymer of higher bulk density than when chlorine is not available.
- Assignee:
- Exxon Research and Engineering Co., Florham Park, NJ
- Patent Number(s):
- US 4707530
- OSTI ID:
- 5737518
- Country of Publication:
- United States
- Language:
- English
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Polymerization catalyst, production and use
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
ALKALINE EARTH METAL COMPOUNDS
ALKENES
ALUMINIUM COMPOUNDS
BULK DENSITY
CATALYSTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
DENSITY
ENERGY
ETHYLENE
HALOGEN COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
MAGNESIUM COMPOUNDS
MINERALS
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYMERIZATION
SILICA
SILICON COMPOUNDS
SILICON OXIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS