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AssigneeDynamit Nobel Aktiengesellschaft
InventorsWilhelm Gresser, Klaus Schelhase, Heinz Frisch, Klaus Kaschel, Berent Reinecke, Wilhelm H. Trautmann
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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.
A process for the decomposition of explosive nitric acid esters dissolved in wastewaters obtained from the manufacture of explosives and not being biodegradable, which comprises heating the wastewater containing the nitric acid esters dissolved therein, while maintaining the wastewater under pressure and in the liquid phase, to temperatures of between 150.degree. C. and 300.degree. C. to decompose the nitric acid esters without explosion.
A process for the decomposition of explosive nitric acid esters of monohydric and polyhydric alcohols dissolved in a wastewater obtained from the manufacture of explosives, said esters not being biodegradable, which comprises heating wastewater containing the explosive nitric acid esters dissolved therein, while maintaining the wastewater under elevated pressure sufficient to maintain the wastewater in a liquid phase, to temperatures between 150.degree. and 300.degree. C. to effect decomposition of the nitric acid esters under such conditions that no explosion occurs due to the thermal instability of the nitric acid esters.
Dependencies are inferred from the claim text.