PROCESS FOR WORKING UP AQUEOUS SOLUTIONS CONTAINING HYDROGEN SULFIDE,HYDROGEN CYANIDE AND AMMONIA

PROCESS FOR WORKING UP 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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ULRICH GERHARDUS, ROLF-DIETER FISCHER, THOMAS MULLER, WOLFGANG BRUNKE, PETER SCHNELLER, KLAUS POLOSZYK, NORBERT LEDER
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
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.