Polymer slurry catalyst residue deactivation
AssigneePhillips Petroleum Company
InventorsMax P. McDaniel, John D. Hottovy, Melvin B. Welch
Life of this patent
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Abstract
Catalyst residues of a transition metal compound and an organometalliccompound contained in a polymer slurry are deactivated by contact with anhydrous carbon dioxide. Preferably the contacting is carried out in a transfer line connecting the reaction zone with a zone of sufficiently lower pressure that flashing of diluent occurs in the transfer line to assure mixing of the carbon dioxide and the catalyst residues.
Claims7
A method for deactivating catalyst residues of a transition metal compound and an organometallic compound contained in a polymer product slurry said method comprising (1) contacting said residue-containing slurry with anhydrous CO.sub.2 in a transfer line downstream of the outlet of a polymerization reaction zone and (2) sufficiently reducing pressure on said polymer slurry to flash at least a portion of the liquid in said slurry thereby producing a zone of turbulence in conjunction with said contacting to cause an action of mixing said polymer slurry and anhydrous CO.sub.2.
Dependencies are inferred from the claim text.