Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1981-12-30
1984-11-20
Garvin, Patrick
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
526116, C08F 464
Patent
active
044839383
ABSTRACT:
A solution process for the preparation of high molecular weight homopolymers of ethylene and copolymers of ethylene and C.sub.3 -C.sub.12 .alpha.-olefins is disclosed. The process involves feeding monomer, a particlar coordination catalyst and hydrocarbon solvent to a reactor, polymerizing the monomer at a temperature of 100.degree.-320.degree. C. and recovering the polymer. The catalyst is obtained by either (i) combining solutions of titanium tetrahalide/vanadium oxytrihalide and of organoaluminum compound at a temperature of less than 30.degree. C., heating the resulting admixture to a temperature of 150.degree.-300.degree. C. for a period of 5 seconds to 60 minutes and combining the thus heat-treated mixture with a solution of an organoaluminum compound or (ii) combining solutions of titanium tetrahalide and of organoaluminum compound at a temperature of less than 30.degree. C., heating the resultant admixture to a temperature of 150.degree.-300.degree. C. for a period of 5 seconds to 60 minutes, combining the thus heat-treated mixture with vanadium oxytrihalide and then combining the mixture so obtained with a solution of an organoaluminum compound. The catalyst thus obtained is fed to the process, without separation of any compounds of the catalyst.
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E. I. Du Pont de Nemours and Company
Garvin Patrick
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