Process for storing liquid waste in salt cavities
AssigneeWintershall Aktiengesellschaft
InventorsWalter Lindorfer, Wilhelm Jahn-Held, Lutz J. Gerschler, Berthold Jandel, Friedel Wartenpfuhl
Life of this patent
Estimating the term…
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 boiling point above 85.degree. C., flash point above 65.degree. C., vapor pressure at 60.degree. C. of up to 0.5 kp/cm.sup.2, and 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.
Claims13
A process for storing liquid waste in a salt cavity said process comprising the steps of treating the liquid waste above ground to produce a pumpable mixture with a pH of 7 or more, which has a
- boiling point above 85.degree. C.,
- flash point above 65.degree. C.,
- vapor pressure at 60.degree. C. of up to 0.5 kp/cm.sup.2 and
- viscosity of less than 300 cP
- and which forms no toxic or flammable gases;
- conveying said mixture to the salt cavity;
- allowing the mixture to stand until separation of the mixture into a heavier and a lighter liquid phase occurs;
- separately pumping both phases out of the cavity, and feeding in a further corresponding volume of the pumpable mixture into the cavity.
Dependencies are inferred from the claim text.