Process for the recovery of tributyl phosphate from spent hydraulic oils

US5608099A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans-G unter Fr ohlen · Leverkusen, DE
• Hans-Dieter Block · Cologne, DE
• Wolfgang Ohlendorf · Leverkusen, DE
• Hans-Heinrich Moretto · Cologne, DE
• Peter C. Schmidt · Leverkusen, DE

Key dates

• Filing date: Nov 1, 1995
• Grant date: Mar 4, 1997
• Expiry date: Nov 1, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/11
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the recovery by distillation of tributyl phosphate (TBPO) from spent hydraulic oils, which are employed particularly in aircraft used for civilian air traffic.