Method and device for decontaminating waters which are loaded with organic halogen compounds (halogenated hydrocarbons)

US7252771B2 · kind B2 · utility

Assignee

• Helmholtz-Zentrum für Umweltforschung GmbH—UFZ · DE

Inventors

• Franz-Dieter Kopinke · Leipzig, DE
• Katrin MacKenzie · Naundorf, DE
• Robert Koehler · Westmont, US
• Holger Weiss · Speyer, DE
• Peter Grathwohl · Lörrach, DE
• Christoph Schueth · Lörrach, DE

Key dates

• Filing date: Jul 12, 2002
• Grant date: Aug 7, 2007
• Expiry date: Jun 25, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/908
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

The invention relates to a process and a device for decontaminating waters, especially groundwaters, which are heavily and complexly polluted with organic halogen compounds (HHC), in which process the contaminated waters are pre-treated in order to convert low-volatility HHC into more readily volatile components, the halogenated hydrocarbons are subsequently transferred from the aqueous phase to the gaseous phase where complete conversion into halogen-free compounds takes place at elevated temperature by means of catalytic reductive dehalogenation.