VERFAHREN ZUR AUFARBEITUNG SCHWEFELWASSERSTOFF, CYANWASSERSTOFF UND AMMONIAK ENTHALTENDER WAESSRIGER LOESUNGEN

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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Main Authors LEDER, NORBERT., 4200 OBERHAUSEN, DE, BRUNKE, WOLFGANG., 4250 BOTTROP, DE, MUELLER, THOMAS., 4220 DINSLAKEN, DE, FISCHER, ROLF-DIETER, POLOSZYK, KLAUS., 4270 DORSTEN, DE, GERHARDUS, ULRICH, SCHNELLER, PETER. DR., 4200 OBERHAUSEN, DE
Format Patent
LanguageGerman
Published 25.06.1992
Subjects
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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Summary: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.
Bibliography:Application Number: DE19904041569