Process for separating methanol from the reaction products obtained in the etherification of C.sub.4 through C.sub.7 isoolefins with methanol

US4544776A · kind A · utility

Assignee

• Deutsche Texaco Aktiengesellschaft · DE

Inventors

• Gunther Osterburg · Rheurdt, DE
• Milan Prezelj · Frankfurt am Main, DE

Key dates

• Filing date: Dec 20, 1982
• Grant date: Oct 1, 1985
• Expiry date: Dec 20, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/20
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The reaction product from etherification of C.sub.4 -C.sub.7 isoolefins with methanol in the presence of an acidic catalyst is washed with water in the presence of inert hydrocarbons thereby removing methanol and a part of the tertiary alcohol. The aqueous extract solution bottoms is distilled to separate methanol as overhead. Tertiary alcohols are withdrawn as a side stream from a tray of the distillation column with a high concentration thereof and fed into the washing column.