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1. WO1991000248 - PROCESS FOR REDUCING THE CYANIDE CONTENT OF A SOLUTION

Publication Number WO/1991/000248
Publication Date 10.01.1991
International Application No. PCT/AU1990/000289
International Filing Date 05.07.1990
IPC
C02F 1/20 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
20by degassing, i.e. liberation of dissolved gases
C02F 1/58 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
58by removing specified dissolved compounds
C02F 1/76 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
72by oxidation
76with halogens or compounds of halogens
C02F 9/00 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
9Multistep treatment of water, waste water or sewage
CPC
C02F 1/20
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
20by degassing, i.e. liberation of dissolved gases
C02F 1/58
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
58by removing specified dissolved compounds
C02F 1/586
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
58by removing specified dissolved compounds
586by removing ammoniacal nitrogen
C02F 1/76
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
72by oxidation
76with halogens or compounds of halogens
C02F 2101/16
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
2101Nature of the contaminant
10Inorganic compounds
16Nitrogen compounds, e.g. ammonia
C02F 2101/18
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
2101Nature of the contaminant
10Inorganic compounds
16Nitrogen compounds, e.g. ammonia
18Cyanides
Applicants
  • MINPROC TECHNOLOGY PTY. LIMITED [AU/AU]; 364 Albert Street East Melbourne, VIC 3002, AU (AllExceptUS)
  • COSTELLO, Michael, Charles [AU/AU]; AU (UsOnly)
  • ROGERS, Douglas, Gordon [AU/AU]; AU (UsOnly)
  • GUERNEY, Philip, John [AU/AU]; AU (UsOnly)
Inventors
  • COSTELLO, Michael, Charles; AU
  • ROGERS, Douglas, Gordon; AU
  • GUERNEY, Philip, John; AU
Agents
  • OBERIN, Colin, James; Oberins 66 Croydon Road Croydon, VIC 3136, AU
Priority Data
PJ 509705.07.1989AU
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR REDUCING THE CYANIDE CONTENT OF A SOLUTION
(FR) PROCEDE DE REDUCTION DE LA TENEUR EN CYANURE D'UNE SOLUTION
Abstract
(EN)
A process for treatment of waste aqueous process streams from industrial processes containing both cyanide ions and dissolved ammonia to reduce the cyanide content, comprising the consecutive steps: (a) adding a halogenating agent to the solution while maintaining the pH of the solution at greater than 7; (b) removing ammonia from the solution by aeration; (c) acidifying the solution to a pH of less than 7; (d) substantially neutralising the solution; and (e) removing the ammonia from the solution by aeration.
(FR)
Le procédé décrit, qui sert à traiter des courants aqueux de traitement d'eaux résiduaires, provenant de processus industriels et contenant à la fois des ions cyanure et de l'ammoniaque dissoute afin d'en réduire la teneur en cyanure, consiste: (a) à ajouter un agent d'halogénation dans la solution, tout en maintenant le pH de la solution au-dessus de 7; (b) à extraire ensuite l'ammoniaque de la solution par aérage; (c) à acidifier ensuite la solution jusqu'à un pH inférieur à 7; (d) à neutraliser la solution; et enfin (e) à extraire l'ammoniaque de la solution par aérage.
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