Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1988-12-02
1990-05-22
Garvin, Patrick P.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502108, 502125, 526124, C08F 464
Patent
active
049277979
ABSTRACT:
The present invention provides a catalyst system that exhibits unprecedented catalyst efficiencies and control of desired properties in the polymer product. The catalyst system includes a Toho-type, new generation titanium catalyst in combination with an electron donor described by the formula: ##STR1## wherein R.sub.1 is a bulky, basic alkyl or cycloalkyl group containing at least one secondary or tertiary carbon atom; R.sub.2 and R.sub.3 are alkyl or aryl groups; and R.sub.4 is an alkyl group with a primary carbon atom attached to the silicon atom. The system has a catalyst efficiency of at least about 30 kg/g-cat.2h as the Al/Si mole ratio varies from 20-200 in the system. The system easily achieves efficiencies over 60 kg/g-cat.2h. The system also exhibits good control over the xylene solubles, melt flow and molecular weight distribution of the polymer product.
REFERENCES:
patent: 3135809 (1964-06-01), Bosmajian
patent: 4816433 (1989-03-01), Terano et al.
patent: 4839321 (1989-06-01), Murai
Abokhair John K.
Fina Technology, Inc.
Garvin Patrick P.
Watt Stuart L.
Wheelington Jimmy D.
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