Process for storing liquid waste in salt cavities

US4577999A · kind A · utility

Assignee

• Wintershall Holding GmbH · DE

Inventors

• Walter Lindorfer · Kassel, DE
• Wilhelm Jahn-Held · Staufenberg, DE
• Lutz J. Gerschler · Bad Salzdetfurth, DE
• Berthold Jandel · Hildesheim, DE
• Friedel Wartenpfuhl · Giesen, DE

Key dates

• Filing date: Nov 18, 1983
• Grant date: Mar 25, 1986
• Expiry date: Nov 18, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C02F2103/38
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A liquid waste with a pH of 7 or more, which has been adjusted above ground if necessary, is treated above ground to produce a pumpable mixture, which has a PA0 boiling point above 85.degree. C., PA0 flash point above 65.degree. C., PA0 vapor pressure at 60.degree. C. of up to 0.5 kp/cm.sup.2, and PA0 viscosity of less than 300 cP and which forms no toxic or flammable gases. The mixture is then conveyed to a salt cavity and allowed to stand until phase separation has occurred before the resulting liquid phases are separately drawn off for further treatment or disposal.