Patent · US Expired

Process for the detoxification of aqueous solutions containing cyanohydrins and/or nitriles

US5204008A · kind A · utility

4Cited by

5References

9Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Manfred Diehl · Frankfurt am Main, DE
Joachim Fischer · Rodgau, DE
Hubert Wolf · Hammersbach, DE

Key dates

Filing date	Mar 26, 1992
Grant date	Apr 20, 1993
Priority date	—
Expiry date	Mar 26, 2012

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S210/904
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A process is disclosed for the detoxication of aqueous solutions which contain cyanohydrins, in particular glycol nitrile, and/or nitriles and in addition contain decomposition catalyst for peroxide compounds, in particular manganese compounds, by perhydrolysis of the cyano compounds at temperatures of from 5.degree. to 80.degree. C. and pH values of from 8 to 12 by means of one or more peroxide compounds which are alkali metal percarbonates and perborates of alkali metals and alkaline earth metals and alkaline earth metal peroxides. The peroxide compounds are added as such to the solution to be detoxified or formed in situ in the solution to be detoxified. Sodium percarbonate is preferably used.

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