Manufacture of tocopherol

US4191692A · kind A · utility

Assignee

• BASF SE

Inventors

• Paul Grafen · Bad Dürkheim, DE
• Henning Kroesche · Bischofswerda, DE
• Bernhard Schulz · Schwetzingen, DE
• Joachim Paust · Schifferstadt, DE
• Sigberg Pfohl · Speyer, DE

Key dates

• Filing date: Apr 14, 1978
• Grant date: Mar 4, 1980
• Expiry date: Apr 14, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D311/72
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In the manufacture of tocopherol (vitamin E) by reaction of isophytol with trimethylhydroquinone in the presence of zinc chloride and acid in a hydrocarbon solvent one of the starting compounds, isophytol, is pretreated with small amounts of ammonia or an amine. Tocopherol is obtained in higher yield and purity.