Method for the production of trimethylhydroquinone

US6063968A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Frank Hubner · Ober-Ramstadt, DE
• Steffen Krill · Mühltal, DE
• Bernd Drapal · Alzenau, DE
• Hermann Schmitt · Rodenbach, DE
• Klaus Huthmacher · Gelnhausen, DE
• Herbert Tanner

Key dates

• Filing date: May 14, 1997
• Grant date: May 16, 2000
• Expiry date: May 14, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to an improved method for the production of 2,3,5-trimethylhydroquinone by rearranging 4-oxo-isophorone (keto-isophorone, 3,5,5-trimethylcyclohex-2-en[e]-1,4-dione) to a trimethylhydroquinone diester and by its subsequent saponification. ##STR1##