Patent ID: 9637570
Date: 2017-05-02
CPC Classifications: B01J,C08F

Claim:
1. A process for producing polymer comprising: a. polymerizing a monomer feed in a slurry polymerization reactor in the presence of a chromium oxide-based catalyst and diluent to produce a polymerization effluent comprising a slurry of polymer solids, unreacted monomer, and diluent; b. continuously discharging at least a portion of said polymerization effluent from the reactor through a discharge valve; c. continuously combining a catalyst poison stream selected from the group consisting of O d. flashing the combination of polymerization effluent and the catalyst poison stream in a first flash tank at a pressure greater than or equal to 0.17 MPa to produce a concentrated polymer effluent and a first gas stream comprising vaporized diluent, unreacted monomer, and catalyst poison; and e. condensing the vaporized diluent and unreacted monomer, and removing the catalyst poison from said condensed diluent and monomer as a gas by venting.