Concentration and separation of corrosive liquid mixtures

US4014735A · kind A · utility

Assignees

• Hch. Bertrams Aktiengesellschaft · CH
• BAYER HEALTHCARE LLC · DE

Inventors

• Hans Guth · Leverkusen, DE
• Hans-Joachim Kaiser · Bensberg, DE
• Klaus Kleine-Weischede
• Hermann Wieschen
• Hans Kuhnlein · Füllinsdorf, CH

Key dates

• Filing date: Aug 15, 1975
• Grant date: Mar 29, 1977
• Expiry date: Aug 15, 1995

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S159/32
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In the processing of a corrosive liquid mixture, such as 50 to 80% aqueous sulfuric acid, by its passage over one surface of a wall of inert heat resistant material, and heating the other surface of said wall, thereby to evaporate from said corrosive liquid mixture the more volatile component thereof, the improvement which comprises heating said wall by contact with an inert liquid material, and heating said inert liquid material indirectly through heat exchange with a normally solid molten material. Desirably the wall of inert material is a pipe surrounded by a molten metal in a first annular jacket and a molten salt in a second annular jacket.