FREMGANGSMAATE VED FJERNING AV NOX FRA AVGASSER SOM DANNES VED FREMSTILLING AV GJOEDNING

NOx-containing exhaust gases arising in the manufacture of fertilisers by digestion of raw phosphates with nitric acid are removed by adsorption in a scrubbing fluid. For this purpose, the exhaust gases are scrubbed in a scrubbing stage with a circulated ammonium nitrate solution of which the concen...

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Hauptverfasser:	DIEHL, LOTHAR, WUNDER, RAINER, REINHARD, PAUL
Format:	Patent
Sprache:	nor
Schlagworte:	CHEMISTRY FERTILISERS MANUFACTURE THEREOF METALLURGY PERFORMING OPERATIONS PHOSPHATIC FERTILISERS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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creator	DIEHL, LOTHAR WUNDER, RAINER REINHARD, PAUL
description	NOx-containing exhaust gases arising in the manufacture of fertilisers by digestion of raw phosphates with nitric acid are removed by adsorption in a scrubbing fluid. For this purpose, the exhaust gases are scrubbed in a scrubbing stage with a circulated ammonium nitrate solution of which the concentration is held at values from 5 to 30 % by weight and the pH is held at values from 3 to 7 by addition of ammonia and the temperature is at most 40 DEG C. The ammonium nitrate solution laden with NOx is heated to at least 55 DEG C in a regeneration stage, cooled again to the temperature of the scrubbing stage after it has left the regeneration stage, and at least partially recycled to the latter.
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For this purpose, the exhaust gases are scrubbed in a scrubbing stage with a circulated ammonium nitrate solution of which the concentration is held at values from 5 to 30 % by weight and the pH is held at values from 3 to 7 by addition of ammonia and the temperature is at most 40 DEG C. The ammonium nitrate solution laden with NOx is heated to at least 55 DEG C in a regeneration stage, cooled again to the temperature of the scrubbing stage after it has left the regeneration stage, and at least partially recycled to the latter.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record>
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subjects	CHEMISTRY FERTILISERS MANUFACTURE THEREOF METALLURGY PERFORMING OPERATIONS PHOSPHATIC FERTILISERS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
title	FREMGANGSMAATE VED FJERNING AV NOX FRA AVGASSER SOM DANNES VED FREMSTILLING AV GJOEDNING
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