Process for separating components of a reaction mixture obtained by high-pressure polymerization of ethylenically unsaturated monomers

US9631035B2 · kind B2 · utility

Assignee

• Basell Polyolefine GmbH · DE

Inventors

• Georg Groos · Schifferstadt, DE
• Erich Neumann · Braunschweig, DE
• Michael Deuerling · Weilerswist, DE
• Dieter Littmann · Heßheim, DE

Key dates

• Filing date: Dec 3, 2014
• Grant date: Apr 25, 2017
• Expiry date: Dec 3, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present disclosure relates to 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 into in a gaseous fraction and a liquid fraction, 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. in a separation vessel which has a vertically arranged cylindrical shape with a ratio of length to diameter L/D of from 4 to 10 and which is equipped with an inlet pipe which 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.