Process for removing pure aromatics

US5059306A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans-Joachim Kramer · Dormagen, DE
• Bruno Schulwitz · Cologne, DE
• Werner Horlitz · Dormagen, DE
• Peter M. Lange · Leverkusen, DE
• Alfred Mitschker · Odenthal, DE

Key dates

• Filing date: Jun 21, 1990
• Grant date: Oct 22, 1991
• Expiry date: Jun 21, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C7/14875
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In the removal of pure aromatics from aromatic-containing hydrocarbon mixtures by liquid-phase extraction or extractive distillation using a selective solvent, the specific cost of separation can be reduced at the same yield of aromatics or the yield of aromatics can be increased at the same specific cost of separation if the liquid-phase extraction or the extractive distillation is carried out in the presence of a reactive solid. At the same time, substantially aromatic-free raffinates are obtained.