High-pressure polymerization process of ethylenically unsaturated monomers in a polymerization reactor

US12110349B2 · kind B2 · utility

Assignee

• Basell Polyolefine GmbH · DE

Inventors

• Dieter Littmann · Heßheim, DE
• Andre-Armand Finette · Cologne, DE
• Christoph Wolf · Pulheim, DE
• Michael Deuerling · Weilerswist, DE
• Juergen Mohrbutter · Bornheim, DE
• Danir Khayrullin · Zeven, DE
• Giulia Mei · Ferrara, IT
• Erich Neumann · Braunschweig, DE

Key dates

• Filing date: Dec 16, 2019
• Grant date: Oct 8, 2024
• Expiry date: Sep 17, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2400/04
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for polymerizing ethylene in a high-pressure polymerization system having a continuously operated polymerization reactor and a reactor blow down system having an emergency valve, a reactor blow down vessel containing an aqueous medium and a reactor blow down dump vessel, wherein the process includes the steps of monitoring the polymerization system for a disturbance, opening the emergency valve when a disturbance occurs to allow the content of the polymerization system to expand into the reactor blow down vessel, contacting the content of the polymerization system in the reactor blow down vessel with the aqueous medium to obtain an aqueous polymer slurry, separating the polymer slurry and gaseous components, and transferring the polymer slurry to the reactor blow down dump vessel.