Process for waste liquid-free processing of chlorosilane distillation residues with hydrochloric acid

US5246682A · kind A · utility

Assignee

• Huls Aktiengesellschaft · DE

Inventors

• Klaus Ruff · Troisdorf, DE
• Bernhard Falk · Rheinfelden (Baden), DE

Key dates

• Filing date: Aug 11, 1992
• Grant date: Sep 21, 1993
• Expiry date: Aug 11, 2012

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A62D2101/22
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for waste liquid-free processing of residues of chlorosilane distillations, wherein the residue is allowed to react with liquid hydrochloric acid accompanied by the release of hydrogen chloride, the resulting reaction mixture is allowed to coagulate, the solid phase is separated and dried and heat-treated, and the liquid phase and the condensed gaseous constituents are recycled into the process.