METHOD OF PROCESSING AQUEOUS SOLUTIONS CONTAINING HYDROGEN SULFIDE, HYDROGEN CYANIDE AND AMMONIA

Aqueous solutions, which are contaminated by hydrogen sulphide, hydrogen cyanide and ammonia, are adjusted to a pH of about 3 or less directly after their formation to remove the contaminants and are treated in a stripping column with an inert gas. Thereupon, the pH of the solution is increased to a...

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Bibliographische Detailangaben
Hauptverfasser: LEDER NORBERT, BRUNKE WOLFGANG, FISCHER ROLF-DIETER, POLOSZYK KLAUS, SCHNELLER PETER, GERHARDUS ULRICH, MUELLER THOMAS
Format: Patent
Sprache:eng
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Zusammenfassung:Aqueous solutions, which are contaminated by hydrogen sulphide, hydrogen cyanide and ammonia, are adjusted to a pH of about 3 or less directly after their formation to remove the contaminants and are treated in a stripping column with an inert gas. Thereupon, the pH of the solution is increased to about 10 or more and it is treated again in a second stripping column with an inert gas.