公开(公告)号：US3719648A

公开(公告)日：1973-03-06

申请号：US3719648D

申请日：1971-06-23

Applicant: STAMICARBON

Inventor： FRIELINK J

IPC: C08F10/02 ,  C08F2/02 ,  C08F6/12 ,  C08F10/00 ,  C08F3/04 ,  C08F15/04

CPC classification number: C08F10/00 ,  C08F2/38 ,  C08F4/28

Abstract: A process for the recovery of powdery homopolymers or copolymers of ethylene from a polymerization system is disclosed, wherein the corresponding monomers are subjected to polymerization conditions in a reactor and the resulting polymer, together with unconverted monomer, is discharged from the reactor and expanded to a lower pressure. At least part of this mixture is quenched by the addition of a cold gas, which gas is at least one of the polymerization monomers, to a temperature below the melting point of the polymer to solidify the polymer contained in such mixture as the form of a fine powder. Thereafter the powder is separated from the mixture and remaining unconverted monomer is recycled to the reactor. The process involves simpler equipment and reduced utility costs as compared to prior processes.