Fatty oil ex Helianthus annuus for the production of diperazelaic acid

USRE36549E · kind E · reissue

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Horst Eierdanz · Hilden, DE
• Paul Schulz · Wuppertal, DE
• Beatrix Kottwitz · Erkrath, DE

Key dates

• Filing date: Dec 21, 1994
• Grant date: Feb 1, 2000
• Expiry date: Dec 21, 2014

Classification

• Technology area (CPC —): General

Abstract

The use of a fatty oil ex Helianthus annuus containing 78 to 92% by weight oleic acid and 2 to 10% by weight linoleic acid for the production of .Iadd.azelaic acid or for the production of .Iaddend.diperazelaic acid .Iadd.from the azelaic acid thus produced.Iaddend., with elimination of enrichment steps with respect to the oleic acid content, by fat splitting, distillation, oxidative ozonolysis of the fatty acid mixture obtained, and .Iadd.in the case of production of diperazelaic acid by .Iaddend.reaction of the azelaic acid thus obtained with hydrogen peroxide to form diperazelaic acid. The resulting diperazelaic acid has improved stability in storage and is obtained in high yields and in highly pure form.