GB1382540A - Electrolytic treatment of waste water containing cyanide - Google Patents

Electrolytic treatment of waste water containing cyanide

Info

Publication number
GB1382540A
GB1382540A GB3097073A GB3097073A GB1382540A GB 1382540 A GB1382540 A GB 1382540A GB 3097073 A GB3097073 A GB 3097073A GB 3097073 A GB3097073 A GB 3097073A GB 1382540 A GB1382540 A GB 1382540A
Authority
GB
United Kingdom
Prior art keywords
waste water
electrolytic treatment
water containing
ocl
june
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3097073A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stanley Electric Co Ltd
Original Assignee
Stanley Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stanley Electric Co Ltd filed Critical Stanley Electric Co Ltd
Publication of GB1382540A publication Critical patent/GB1382540A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • C02F1/4674—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C02F2101/18—Cyanides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Removal Of Specific Substances (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

1382540 Electrolytic treatment of cyanidecontaining water STANLEY DENKI K K 29 June 1973 [29 June 1972] 30970/73 Heading C7B Waste water containing at least one cyanide e.g. from a cyanogen-zinc complex salt is treated by adding to the waste water having a pH greater than 10 a material which produces OCl<SP>-</SP> ion in solution, such as bleaching powder or NaOCl, electrolyzing it to produce cyanic acid so lowering the pH to less than 9 by the H<SP>+</SP> ions simultaneously produced, whereby a secondary reaction between the CNO<SP>-</SP> and OCl<SP>-</SP> ions occurs to produce N 2 and CO 2 . If the pH of the waste water is less than 10, NaOH, may be added to raise it to more than 10. The cell may comprise graphite electrodes: a central anode with two outer cathodes.
GB3097073A 1972-06-29 1973-06-29 Electrolytic treatment of waste water containing cyanide Expired GB1382540A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47065235A JPS5143308B2 (en) 1972-06-29 1972-06-29

Publications (1)

Publication Number Publication Date
GB1382540A true GB1382540A (en) 1975-02-05

Family

ID=13281034

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3097073A Expired GB1382540A (en) 1972-06-29 1973-06-29 Electrolytic treatment of waste water containing cyanide

Country Status (6)

Country Link
JP (1) JPS5143308B2 (en)
BE (1) BE801642A (en)
CH (1) CH557784A (en)
DE (1) DE2331189A1 (en)
FR (1) FR2202042B1 (en)
GB (1) GB1382540A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2241960A (en) * 1990-03-15 1991-09-18 Xinyu Yang Electrolytic treatment of cyanide-containing liquid waste and treatment of by-product gas
US5288373A (en) * 1990-03-15 1994-02-22 Xinyu Yang Process of removing cyanide from waste water

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5013986A (en) * 1973-06-09 1975-02-13

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2241960A (en) * 1990-03-15 1991-09-18 Xinyu Yang Electrolytic treatment of cyanide-containing liquid waste and treatment of by-product gas
US5288373A (en) * 1990-03-15 1994-02-22 Xinyu Yang Process of removing cyanide from waste water
GB2241960B (en) * 1990-03-15 1994-08-03 Xinyu Yang Decyanation process

Also Published As

Publication number Publication date
CH557784A (en) 1975-01-15
FR2202042A1 (en) 1974-05-03
JPS5143308B2 (en) 1976-11-20
BE801642A (en) 1973-10-15
FR2202042B1 (en) 1976-06-18
JPS4923951A (en) 1974-03-02
DE2331189A1 (en) 1974-01-17

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19930628