Patent ID: 9631035
Date: 2017-04-25
CPC Classifications: C08F,C08J,Y02P

Claim:
1. A process for separating polymeric and gaseous components of a reaction mixture obtained by high-pressure polymerization of ethylenically unsaturated monomers in the presence of free-radical polymerization initiators, the process comprising the steps of entering the reaction mixture into a separation vessel; separating the reaction mixture into a gaseous fraction and a liquid fraction; withdrawing the gaseous fraction from the top of the separation vessel and withdrawing the liquid fraction from the bottom of the separation vessel, wherein the separation is carried out at a pressure of from 15 MPa to 50 MPa and a temperature of from 120° C. to 300° C.; the separation vessel has a vertically arranged cylindrical shape with a ratio of length to diameter L/D of from 4 to 10 and is equipped with an inlet pipe for introducing the reaction mixture into the separation vessel; the inlet pipe extends vertically from the top into the separation vessel; and the ratio of the inner diameter of the inlet pipe at its lower end and the inner diameter of the separating vessel in its cylindrical part is in the range of from 0.2 to 0.4.