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

US9908954B2 · kind B2 · utility

Assignee

• Basell Polyolefine GmbH · DE

Inventors

• Dieter Littmann · Heßheim, DE
• Jürgen Peter Mohrbutter · Bornheim, DE
• Giulia Mei · Ferrara, IT
• Andre-Armand Finette · Cologne, DE
• Sven Wolfram · Euskirchen, DE
• Michael Deuerling · Weilerswist, DE
• Danir Khayrullin · Zeven, DE
• Georg Groos · Schifferstadt, DE
• Christoph Wolf · Pulheim, DE

Key dates

• Filing date: Aug 10, 2017
• Grant date: Mar 6, 2018
• Expiry date: Aug 10, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2323/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present technology relates to a process for polymerizing or copolymerizing ethylenically unsaturated monomers in the presence of free-radical polymerization initiators, wherein the polymerization is carried out in a continuously operated tubular reactor at temperatures from 100° C. to 350° C. and pressures from 180 MPa to 340 MPa, with a specific reactor surface area Asp of 2 m2/(t/h) to 5.5 m2/(t/h), and the tubular reactor has a specific ratio RDsp of 0.0050 MPa−1 to 0.0069 MPa−1 and an inner surface which has a surface roughness Ra of 2 μm or less.