Process for the separation of quinoline-insoluble components from coal tar pitch

US4259171A · kind A · utility

Assignee

• Rutgerswerke Aktiengesellschaft · DE

Inventors

• Jurgen Stadelhofer · Dortmund, DE
• Gerd Collin · Duisburg, DE

Key dates

• Filing date: Feb 28, 1979
• Grant date: Mar 31, 1981
• Expiry date: Feb 28, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10C1/18
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Quinoline-insoluble components are separated from coal tar pitch by treating the coal tar pitch which has a softening point of greater than 60.degree. C. (according to the method of Kraemer-Sarnow) with a solvent mixture comprising at least one solvent with paraffinic characteristics and at least one tar solvent, wherein the treatment is carried out at a temperature in the range of 200.degree. to 270.degree. C.