公开(公告)号：US3816383A

公开(公告)日：1974-06-11

申请号：US24932872

申请日：1972-05-01

Applicant: NAT PETRO CHEM

Inventor： STOTKO N

IPC: C08F6/00 ,  B01J8/00 ,  B01J19/18 ,  C08F2/14 ,  C08F6/06 ,  C08F10/00 ,  C08F10/02 ,  C08F110/00 ,  C08F1/88 ,  C08F3/06

CPC classification number: B01J19/1837 ,  B01J8/0055 ,  B01J19/1881 ,  C08F10/00 ,  C08F10/02 ,  C08F2/14

Abstract: Process for the separation of olefin polymers from product slurries removed from a polymerization zone, in which the slurry is passed directly into a cyclone separator, a portion of the underflow from the separator being taken off for recovery of the solid polymer and the overflow therefrom being combined with the residual portion of the underflow and recycled to the polymerization reactor. A pressure differential is maintained between the take-off and recycle points in the polymerization reactor whereby to maintain continual fluid flow through the separator. Recycle of the diluent-rich overflow from the cyclone avoids blockage of the composite recycle stream.