Patent ID: 6844400

Claim:
A crude polyolefin product catalyst removal and wash system comprising: an upstream settler vessel defining an internal settlement chamber adapted and arranged for receiving a mixture of a crude polyolefin product and an aqueous wash media and allowing said product and said media to separate therein under the influence of gravity; a crude, catalyst containing olefin polymerization product inlet line in fluid communication with the chamber of said upstream settler vessel; a catalyst killing agent inlet conduit in fluid communication with the chamber of said upstream settler vessel; a first make-up water inlet passageway in fluid communication with the chamber of said upstream settler vessel; a downstream settler system including at least one downstream settler vessel defining an internal settlement chamber adapted and arranged for receiving a mixture of a partially washed crude polyolefin product and an aqueous wash media and allowing said product and said media to separate therein under the influence of gravity; an overhead, partially washed polyolefin product line intercommunicating the chamber of said upstream settler vessel with said downstream settler system; a washed crude olefin polymerization product outlet line in fluid communication with said downstream settler system; a second make-up water inlet passageway in fluid communication with said downstream settler system; a first drain line interconnecting the chamber of said upstream settler vessel with an inlet connection to a waste water receiving system; and a second drain line interconnecting said downstream settler system with said inlet connection.