Process for the working up of salvage oil

US4797198A · kind A · utility

Assignee

• Krupp Koppers GmbH · DE

Inventors

• Rolf Wetzel · Heiligenhaus, DE
• Hubert Coenen · Essen, DE
• Winfried Kreuch · Werden, DE

Key dates

• Filing date: Jan 27, 1987
• Grant date: Jan 10, 1989
• Expiry date: Jan 27, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10M175/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process is disclosed for the working up of salvage oil, in which the salvage oil is subjected to an extraction under supercritical conditions. The halogen compounds contained in the produced extract are removed by catalytic hydrogenation. The extraction residue is eliminated by deposition or thermal treatment (gasification). In the case of a thermal treatment of the extraction residue, other residues can be simultaneously converted, so that the process is performed without yield of environmentally burdensome residues or by-products. Ethane in particular and/or propane is employed as solvent for the supercritical extraction.