Spent acid purification process

Contaminants in spent nitric-sulfuric nitration acid can be removed by mixing the spent acid with urea and heating to 75 DEG -150 DEG C. Off-gas from the spent acid/urea reaction is passed through a Group IB, VB, VIB or VIII metal containing catalyst to decompose nitrous oxides and the so-treated of...

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Bibliographische Detailangaben

Hauptverfasser:	MALFER, DENNIS J, STEADMAN, J. FRANCIS, WILSON, JR., R. WOODROW, HANE, J. KEITT, DANIELS, GEORGE A
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS
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