Patent · US Expired

Process for the decoloration and detoxification of aqueous effluents

US6083398A · kind A · utility

2Cited by

4References

12Claims

0Family size

Assignee

SOLVAY (Société Anonyme) · BE

Inventors

Michael Pittroff · Hannover, DE
Karl Gregor · Bochum, DE
Ludwich Bettens · Wetteren, BE

Key dates

Filing date	Nov 26, 1997
Grant date	Jul 4, 2000
Priority date	—
Expiry date	Nov 26, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S210/917
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

Process for the decoloration and the toxification of highly polluted (COD.gtoreq.1000 mg/l) resistant aqueous effluents by an oxidation treatment of the effluents by hydrogen peroxide, continuously and in a homogeneous phase, at a pH of 2 to 5 in the presence of Fe ions and under irradiation by means of UV radiation. The AvOx/COD ratio by weight is not less than 0.5:1 and the AvOx/concentration of Fe ions ratio by weight is not less than 50:1.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.