Method of producing dry thioctic acid

US5981767A · kind A · utility

Assignee

• Asta Medica Aktiengesellschaft · DE

Inventors

• Herbert Tanner
• Karlheinz Drauz · Alzenau, DE
• Gerhard Sator · Dieburg, DE
• Horst Bethge · Hanau, DE
• Roland Moller · Herbrechtingen, DE
• Frank Hubner · Ober-Ramstadt, DE
• Thomas Tacke · Friedrichsdorf, DE
• Claus Rehren · Aschaffenburg, DE

Key dates

• Filing date: Jun 23, 1998
• Grant date: Nov 9, 1999
• Expiry date: Jun 23, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/54
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The present invention is relative to a method of producing dry thioctic acid in which a raw material in which concentrated thioctic acid is present is treated with liquid or supercritical CO.sub.2, thus yielding thioctic acid with low residual solvent contents in a simple industrial method.