Process for producing porous polymer globules

US6300468A · kind A · utility

Assignee

• Solvay Deutschland GmbH · DE

Inventors

• Karl-Heinz Bretz · Nienburg, DE
• Heinz-Helmer Rasche · Burgdorf, DE
• Helmut Derleth · Nienburg, DE
• Philippe Francois · Court-Saint-Etienne, BE

Key dates

• Filing date: Sep 23, 1999
• Grant date: Oct 9, 2001
• Expiry date: Sep 23, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for producing porous polymer beads in which polymers, preferably polyolefins or polyvinyl chloride, are dissolved in a solvent, preferably halogenated hydrocarbons or alkyl esters, at temperatures close to the boiling point of the solvent. The hot polymer solution is cooled, and the polymer beads formed during the cooling process are separated, washed and dried. The porous polymer beads are useful, for example, as catalyst carriers or as adsorption agents.