Process for lightening the color of polyol esters

US8524938B2 · kind B2 · utility

Assignee

• OXEA GMBH · DE

Inventors

• Guido D. Frey · Riedstadt, DE
• Thorsten Kreickmann · Oberhausen, DE
• Heinz Strutz · Usingen, DE

Key dates

• Filing date: Oct 6, 2010
• Grant date: Sep 3, 2013
• Expiry date: Sep 17, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/60
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for lightening the color of polyol esters by reacting polyols with linear or branched aliphatic monocarboxylic acids having 3 to 20 carbon atoms, wherein the reaction product is worked up without using adsorbents and comprises a treatment with ozone or ozone-containing gases and an immediately subsequent steam treatment with subsequent drying.