Deutsche Gold- Und Silber-scheideanstalt Vormals Roessler

Degussa Aktiengesellschaft

Helmut Junkermann

Horst Kruger

Gerhard Pohl

Rudolf Fahnenstich

Herbert Tanner

Heidrun Bertram

Heinrich Schwab

Volker Hafner

Waste water containing phenol, phenol derivatives or phenol plus formaldehyde is purified by treating the waste water with hydrogen peroxide and either iron, copper or the complex salt sodium iron (III) ethylenediamine tetraacetate.

Process for the detoxification of waste water containing phenol, phenol

Liquid manure is deodorized and harmful gases removed therefrom by introducing formaldehyde and a peroxy compound into the manure one or more times.

Process for deodorizing liquid manure and removing harmful gases

Phenol or phenol-formaldehyde containing waste water is purified with chlorine dioxide by treating the waste water with alkali or alkaline earth metal chlorite in the presence of formaldehyde and the weight ratio of formaldehyde to phenol is between 0.5 to 2:1 and the mole ratio of the sum of phenol + formaldehyde to chlorite is between 1:1.2 to 1:2, whereupon the treated water is decolorized, in a given case in known manner.

Process for the purification of phenol and phenol formaldehyde

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.

Process for detoxification of formaldehyde containing waste waters

Fodder, mixed fodder and silage are preserved with acrylic acid, methacrylic acid or esters or salts of such acids.

Growing community of inventors

Frankfurt-am-Main, Germany

Helmut Junkermann