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US 7,402,636 B1Granted
Method and apparatus for decreasing polymer deposition
AssigneeExxonMobil Chemical Patents Inc.
InventorsTimothy D. Shaffer, Michael F. McDonald, David Y. Chung, Robert N. Webb, Deborah J. Davis, Pamela J. Wright
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Abstract
The disclosure provides a slurry polymerization system and method to decrease polymer deposition on reactor surfaces using an oxygenate such as alcohol (16) supplied to the polymerization medium (32) separate from the catalyst feed (34).
Claims38
A method to decrease polymer deposition on reactor surfaces in a slurry polymerization system, comprising:
- supplying a monomer feed and a catalyst feed to form a polymerization medium in the reactor;
- concurrently supplying an alcohol to the polymerization medium in a feed separate from the catalyst feed.
A slurry polymerization system, comprising:
- a reactor adapted to polymerize a polymerization medium comprising a halogenated hydrocarbon diluent, one or more monomer(s) and a catalyst comprising one or more Lewis acid(s) and one or more initiator(s);
- a line adapted to supply catalyst to the reactor;
- a line adapted to supply monomer to the reactor separately from the catalyst line;
- and
- a line adapted to add alcohol to the reactor separately from the catalyst line, the alcohol addition line feeding into the monomer supply line.
2 more elements
Dependencies are inferred from the claim text.