Solvay Deutschland Gmbh

Deutsche Solvay-werke Gmbh

Horst Linke

Gerald Jakobson

Helmut Dillenburg

Wolfgang Dilla

Erich Ploenissen

Hans-Georg Krebber

Detlef Orzol

Werner Siemanowsky

Michael Klumpe

The present invention relates to a process for decreasing the content of organic-chemical substances in waste water by chemical oxidation, preferably in the presence of chlorine, and optionally additional alkaline thermal treatment of the waste water, in which the waste water, which has a COD content (chemical oxygen demand) and is alkaline or is rendered alkaline, is introduced into at least one reactor and is treated at a temperature of more than 15.degree. C. with a chlorine-containing and/or chlorine-releasing chemical substance, the introduction of chlorine taking place in a quantity of more than 1 g chlorine/g COD (relative to the chlorine content of the chlorine-containing and/or chlorine-releasing chemical substance), and a molar ratio of OH.sup.- to chlorine of more than 1.5 and a pH value of the waste water of .gtoreq.5 being maintained or set, and the resulting chlorine-treated, hypochlorite-containing waste water is subjected to a reaction time of more than 0.25 hours, with the organic compounds being at least partially oxidized, and subsequently the waste water is treated further and/or is discharged or drained from the reactor.

Process for treating waste water

A process for preparation of polyglycerol is provided, comprising the steps of (a) reacting glycerol or diglycerol with hydrogen chloride at between about 340.degree. K. and about 410.degree. K. to yield a mixture that comprises an .alpha.-monochlorohydrin of glycerol or an .alpha.-monochlorohydrin of diglycerol, (b) mixing the .alpha.-monochlorohydrins and an alkali metal glycerolate or an alkali metal diglycerolate at a temperature of between about 320.degree. K. and 410.degree. K. to yield a mixture of alkali metal chloride and glycerol and/or diglycerol and polyglyerol, (c) separating the alkali metal chloride from the glycerols and (d) separating the polyglycerol from glycerol and/or diglycerol.

Process for the preparation of polyglycerols

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Rheinberg, Germany

Horst Linke