Olefin polymerization using chromium on fluorided aluminophosphate
A polymerization process is described comprising contacting a predominantly ethylene monomer system under slurry polymerization conditions in a hydrocarbon diluent with a catalyst comprising a chromium compound on a fluorided aluminophosphate support produced by combining an aluminum salt with a source of phosphate ions in a concentrated mass and thereafter neutralizing to give a gel. The gel is mixed with an acidic polar organic liquid containing a fluoriding agent and worked until a reduction in volume occurs, the polymerization being carried out utilizing a reaction temperature within the range of 93/sup 0/ to 107/sup 0/C in the presence of hydrogen in an amount within the range of 0.1 to 1.5 mole percent based on diluent, a trialkylborane compound wherein the alkyl groups have 1 to 5 carbon atoms per group, in an amount to give a ratio of boron atoms to chromium atoms within the range of 0.04:1 to 1.5:1. The aluminophosphate has a phosphorus to aluminum atom ratio within the range of 0.15 to 0.4, the aluminophosphate carrying the chromium compound having been activated in air at a temperature within the range of about 482/sup 0/ to 704/sup 0/C.
- Assignee:
- Phillips Petroleum Co., Bartlesville, OK
- Patent Number(s):
- US 4596862
- OSTI ID:
- 5503198
- Resource Relation:
- Patent File Date: Filed date 24 Dec 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALKENES
POLYMERIZATION
ALUMINIUM PHOSPHATES
BORANES
CHROMIUM COMPOUNDS
ETHYLENE
FLUORINATION
GELS
HIGH TEMPERATURE
HYDROGEN
MEDIUM TEMPERATURE
PH VALUE
QUANTITY RATIO
SLURRIES
ALUMINIUM COMPOUNDS
BORON COMPOUNDS
CHEMICAL REACTIONS
COLLOIDS
DISPERSIONS
ELEMENTS
HALOGENATION
HYDROCARBONS
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
SUSPENSIONS
TRANSITION ELEMENT COMPOUNDS
360401* - Polymers & Plastics- Preparation & Fabrication- (-1987)