Gas-phase polymerization in a bell-shaped reactor

US6441108B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Friedrich Haendeler · Bensberg, DE
• Heiko Herold · Dormagen, DE
• Leslaw Mleczko · Bochum, DE
• Claus Riehle · Odenthal, DE
• Franz-Josef Mersmann · Bensberg, DE
• Jürgen Schneider · Kirchzarten, DE
• Michael Dauben · Neuss, DE

Key dates

• Filing date: Apr 6, 2000
• Grant date: Aug 27, 2002
• Expiry date: Apr 6, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/918
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the continuous discharge of pre-classified polymer particles, particularly rubber particles, from a gas phase polymerization reactor, comprising the steps of classifying the polymer in a classifier, discharging the particles with a sufficient size and conveying the undersized particles back into the gas phase polymerization reactor.