Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1995-06-07
1999-04-06
Bell, Mark L.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502103, 502115, 502116, 502133, 502158, 502126, 502125, 526128, 5261249, 5261253, B01J 3100, B01J 3700, C08F 402, C08F 460
Patent
active
058918175
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 new generation titanium catalyst in combination with an electron donor described by the formula: ##STR1## wherein R.sub.1 is an alkyl group containing a primary carbon atom attached to the silicon 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; R.sub.1 and R.sub.4 are the same or different. R.sub.1 and R.sub.4 are preferably chosen from the group consisting of n-propyl, n-butyl and methyl; most preferably n-propyl and n-butyl with R.sub.1 and R.sub.4 being the same or, alternatively, most preferably, R.sub.1 is methyl and R.sub.4 is C.sub.3 or higher. The system has a catalyst efficiency of over 30 kg/g-cat.multidot.h as the Si/Ti mole ratio varies from 4-20 in the system. The system easily achieves efficiencies over 30 kg/g-cat.multidot.h. The system also exhibits good control over the xylene solubles of the polymer products.
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Rauscher David John
Shamshoum Edwar S.
Bell Mark L.
Cheairs M. Norwood
Fina Technology, Inc.
Pasterczyk J.
Wheelington Jimmy D.
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