Process for treating waste water containing chlorinated organic compounds from production of epichlorohydrin

US5393428A · kind A · utility

Assignee

• Solvay Deutschland GmbH · DE

Inventors

• Wolfgang Dilla · Rheinberg, DE
• Helmut Dillenburg · Rheinberg, DE
• Erich Ploenissen · Rheinberg, DE
• Michael Sell · Peine, DE

Key dates

• Filing date: Sep 2, 1993
• Grant date: Feb 28, 1995
• Expiry date: Sep 2, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/909
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A process for treating waste water containing chlorinated organic substances, particularly waste water from production of epichlorohydrin which contains more than 10 mg of adsorbable organic halogen compounds (AOX) per liter, comprising charging the waste water at a pH of 10 to 14 (measured at room temperature) into a reactor and maintaining a temperature of at least 75.degree.C., a pressure of at least 1 bar (abs.), and a residence time of at least 0.5 hours in said reactor, thereby partially dechlorinating and/or dehydrochlorinating chlorinated organic compounds contained in the waste water, and thereafter subjecting the waste water to further dechlorination and/or dehydrochlorination treatment in the presence of a hydrogen-containing gas, a hydrogen-releasing compound and/or a catalytically active material; and optionally subjecting the waste water to a biological treatment with the use of microorganisms; and apparatus for carrying out the foregoing process.