Patent · US Expired

Process for detoxification of formaldehyde containing waste waters

US4104162A · kind A · utility

9Cited by

1References

10Claims

0Family size

Assignee

Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler

Inventors

Helmut Junkermann · Frankfurt, DE
Heinrich Schwab · Frankfurt, DE

Key dates

Filing date	Aug 4, 1975
Grant date	Aug 1, 1978
Priority date	—
Expiry date	Aug 4, 1995

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC02F1/722
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

Formaldehyde containing waste water is detoxified by treating the waste water with hydrogen peroxide in the presence of alkali at an initial temperature of 10.degree.-35.degree. C. In an alternative and preferred form of the invention the waste water is heated to a temperature of at least 50.degree. C and then 10-35% of the hydrogen peroxide equivalent to the formaldehyde is added.

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