Method and device for the simultaneous production of acid and base of high purity

US6444107B2 · kind B2 · utility

Assignee

• SGL Technik GmbH · DE

Inventors

• Georg Hartel · Freiberg, DE
• Christian Bienhüls · Meitingen, DE
• Jurgen Kunzel · Thierhaupten, DE

Key dates

• Filing date: Feb 5, 2001
• Grant date: Sep 3, 2002
• Expiry date: Feb 5, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A20/124
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An electrodialytic method and device for the simultaneous production of acids and bases of high purity and higher concentration operates by splitting corresponding salts in aqueous solution using an electrolysis cell. The electrolysis cell includes a cathode chamber in which an alkali is formed, a salt chamber for supplying a salt to be split, an acid chamber in which the acid is formed, and an anode chamber through which a mineral acid flows as a proton carrier. The anode is a hydrogen-consuming electrode. The method and device are preferably used in the production of hydrochloric acid and sodium hydroxide solution.