Method of and reactor for producing chlorine dioxide

US4938944A · kind A · utility

Assignee

• Metallgesellschaft AG · DE

Inventors

• Rainer Dworak · Wiesbaden, DE
• Peter Kohl · Neuberg, DE
• Karl Lohrberg · Heusenstamm, DE
• Reinhard Muller · Baden, CH

Key dates

• Filing date: Jun 2, 1989
• Grant date: Jul 3, 1990
• Expiry date: Jun 2, 2009

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/00083
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

For the production of a gaseous mixture contains chlorine dioxide and chlorine, alkali chlorate in an aqueous solution with acid is reacted in a reactor. The reactor comprises a plurality of superimposed reaction levels which are traversed by the solution from top to bottom. In the lower portion of the reactor the solution in which chlorate and acid have been depleted is reboiled in a reboiling chamber by an indirect heating at a temperature in the range from 100.degree. to 110.degree. C. The depleted solution is conducted from the reboiling chamber to a pressure chamber, in which a pressure of at least 1.2 bar is maintained. In the pressure chamber the solution is reboiled at temperatures from 110.degree. to 150.degree. C. and the vapors formed by the reboiling in the pressure chamber are conducted through the reboiling chamber for an indirect heating therein.