Freeze regeneration of glycol solutions loaded with water

US4081257A · kind A · utility

Assignee

• Linde GmbH · DE

Inventors

• Eberhard Lassmann · Pullach, DE
• Heinz Karwat · Pullach, DE

Key dates

• Filing date: Mar 30, 1976
• Grant date: Mar 28, 1978
• Expiry date: Mar 30, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C31/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Aqueous glycol solutions, used for example, in the de-icing of heat exchange surfaces used in defogging systems, are regenerated by freeze crystallization, the ice being separated with relatively little loss of glycol.