Process for the desensitization of water-insoluble peroxycarboxylic acids

US4874556A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Manfred Dankowski · Karlstein, DE
• Willi Hofen · Rodenbach, DE

Key dates

• Filing date: Oct 28, 1988
• Grant date: Oct 17, 1989
• Expiry date: Oct 28, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C407/003
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for desensitization of water insoluble peroxycarboxylic acids with essentially sodium sulfate in the aqueous phase, wherein the desensitized peroxycarboxylic acids is separated from the mother liquor, and the sodium sulfate contained in the mother liquor is isolated by one- or multi-stage crystallization in purified form as the deca (hepta) hydrate and this, directly or after conversion to an aqueous sodium sulfate solution, and/or anhydrous sodium sulfate is returned to the desensitization process. The process is nonpolluting and can be operated safely on the industrial scale. The peroxycarboxylic acids desensitized according to the invention are characterized by lower heavy metal content and high storage stability.