Dynamit Nobel Aktiengesellschaft

Wilhelm Gresser

Gunther Meyer

Gerhard Bier

Wilhelm H Trautmann

Heinz Frisch

Berent Reinecke

Klaus Kaschel

Klaus Schelhase

Siegmund Frick

A process for effecting thermal decomposition of explosive nitric acid esters in wastewater effluents of the explosives industry wherein no additional by-products are produced and wherein the danger of explosions is avoided. In this process, the dissolved esters are exposed to a temperature of between 150.degree. and 300.degree. C. under pressure lying above the boiling pressure of the wastewater. During this step, the nitric acid esters are completely decomposed, and the wastewater treated in this way can then be passed on to further processing and purification. In a preferred embodiment, the hot wastewater exiting from a decomposer unit is exploited for preheating the effluent before it enters the decomposer unit.

Process for the decomposition of explosive nitric acid esters dissolved

Polyvinylchloride inhibited against release of hydrogen chloride at elevated temperature is produced by polymerizing vinyl chloride in a reaction medium having finely divided calcium carbonate dispersed therein.

Polyvinylchloride polymer inhibited against release of hydrogen chloride

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Ludinghausen, Germany

Wilhelm Gresser