Polymer mitigation
AssigneeNOVA Chemicals (International) S.A.
InventorsIsam Jaber, Charles Ashton Garret Carter, Eric Clavelle, Andrzej Krzywicki, Ian Ronald Jobe, P. Scott Chisholm, Kamal Elias Serhal, Russell Kirk Archer, Keith Wayne Besenski
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Abstract
Ethylene is selectively oligomerized in a continuously stirred tank reactor (CSTR) that is preferably operated in an isothermal manner using a chromium catalyst. The undesired formation of by-product polyethylene is mitigated by contacting the ethylene with hydrogen prior to adding the ethylene to the reactor and feeding the ethylene and hydrogen via a common feed port.
Claims11
A continuous process for the oligomerization of ethylene in a liquid full, continuously stirred tank reactor, comprising the steps of:
- a) feeding ethylene, hydrogen and an oligomerization catalyst system to said reactor;
- b) oligomerizing said ethylene in the presence of said catalyst system and said hydrogen, characterized in that
- c) said ethylene and said hydrogen are contacted prior to being added to said reactor and are jointly added to said reactor via a common feed tube.
Dependencies are inferred from the claim text.