Process for producing dispersions

US6991190B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Wolfgang Lortz · Wächtersbach, DE
• Christoph Batz-Sohn · Hanau, DE
• Bernd Penth · Lebach, DE

Key dates

• Filing date: Feb 4, 2003
• Grant date: Jan 31, 2006
• Expiry date: Feb 4, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S241/14
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A finely divided, stable dispersion of a solid is produced by: spraying at least two streams of a preliminary dispersion, each through a separate nozzle by pumps, onto a collision point in a reactor chamber enclosed by a reactor housing; passing water vapor through an opening into the reactor chamber so that a vaporous atmosphere consisting mainly of water vapor prevails in the reactor chamber; and removing the finely divided dispersion and a) vapor, b) partially condensed vapor consisting mainly of water or c) a combination of a) and b) from the reactor chamber by excess pressure of an incoming water vapor on the gas inlet side; wherein the solid has an average particle size of from 10 nm to 10 μm.