Process for obtaining monodisperse microspheroidal particles, microspheroidal silica particles of high specific surface, and catalysts supported on these particles

US5232883A · kind A · utility

Assignee

• SOLVAY (Société Anonyme) · BE

Inventors

• Helmut Derleth · Nienburg, DE
• Abel Grosjean · Brussels, BE

Key dates

• Filing date: Mar 9, 1992
• Grant date: Aug 3, 1993
• Expiry date: Mar 9, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F10/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Process for obtaining monodisperse microspheroidal particles, comprising spraying an electrostatically charged gellable liquid material through a spraying orifice and into a chamber, so as to produce macrodrops which break up into microdrops which fall in the chamber and within which gelling is produced after spraying. The microspheroidal particles thus obtained can be collected on a solid surface or preferably in a liquid medium and find application in the manufacture of silica-based microspheroidal particles. These microspheroidal particles can be employed as catalyst supports for alpha-olefin polymerization.