Procedure for the reprocessing of used lubricating oils

US4255252A · kind A · utility

Assignee

• Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler

Inventors

• Helmut Knorre · Seligenstadt, DE
• Manfred Langer · Hanau, DE
• Gerhard Pohl · St. Georgen, DE

Key dates

• Filing date: Mar 22, 1979
• Grant date: Mar 10, 1981
• Expiry date: Mar 22, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10M175/0016
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A method for reprocessing used lubricating oils is disclosed wherein the oil is dried, treated with finely dispersed sodium metal at elevated temperature, the remaining free or organically bound metal is decomposed by means of an active hydrogen containing compounds, followed by distillation of the oil for recovery.