GB1044961A - A method of treating and eliminating copper from sulphuric acid-containing and nitric acid-containing effluents derived from pickling processes - Google Patents

A method of treating and eliminating copper from sulphuric acid-containing and nitric acid-containing effluents derived from pickling processes

Info

Publication number
GB1044961A
GB1044961A GB1965663A GB1965663A GB1044961A GB 1044961 A GB1044961 A GB 1044961A GB 1965663 A GB1965663 A GB 1965663A GB 1965663 A GB1965663 A GB 1965663A GB 1044961 A GB1044961 A GB 1044961A
Authority
GB
United Kingdom
Prior art keywords
copper
acid
nitric acid
precipitate
sulphuric acid
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
GB1965663A
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.)
VTW Anlagen UK Ltd
Original Assignee
Water Engineering 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 Water Engineering Ltd filed Critical Water Engineering Ltd
Publication of GB1044961A publication Critical patent/GB1044961A/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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F1/4676—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electroreduction
    • C02F1/4678—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electroreduction of metals
    • 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
    • C02F2101/20—Heavy metals or heavy metal compounds

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Lubricants (AREA)

Abstract

Copper is removed from a sulphuric acid-containing or nitric acid-containing effluent from a pickling plant by precipitating the copper as a hydroxide and/or oxide by addition of sufficient caustic alkali, separating the precipitate from the effluent and the precipitate is then dissolved in sulphuric or nitric acid and the resultant solution electrolyzed to recover metallic copper. Typically water used in rinsing copper sheets from a rolling mill pickled in sulphuric acid is brought to pH 7.8 to 8.1 with caustic soda to precipitate the copper content and the resultant clear water is either run into a drain or used for cooling. The precipitate is dissolved in sulphuric acid mixed with part of the pickling bath, and electrolyzed between a copper cathode and a lead anode with an applied potential of 2.3v at a current density of 12 to 14 amps/dm2 to cathodically deposit copper. The freed sulphuric acid is returned to the pickling bath which is kept at an acid content above 159 e.g. 25% and a copper content below 30 g/l. For rinsing water from brass wire pickled in a nitric acid-chromic acid the pH is raised with caustic soda to 7.9-8.5 to produce a copper-zinc sludge, and the clear water is treated to remove the chromate content either by ion exchange or by deposition as barium chromate before discharge to a drain. The copper-zinc sludge is thickened, dissolved in nitric acid and electrolyzed between a graphite anode and a copper cathode to deposit a mixture of metallic copper and zinc on the cathode.
GB1965663A 1962-05-29 1963-05-17 A method of treating and eliminating copper from sulphuric acid-containing and nitric acid-containing effluents derived from pickling processes Expired GB1044961A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA0040320 1962-05-29

Publications (1)

Publication Number Publication Date
GB1044961A true GB1044961A (en) 1966-10-05

Family

ID=6931901

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1965663A Expired GB1044961A (en) 1962-05-29 1963-05-17 A method of treating and eliminating copper from sulphuric acid-containing and nitric acid-containing effluents derived from pickling processes

Country Status (2)

Country Link
DE (1) DE1459451A1 (en)
GB (1) GB1044961A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1215176A1 (en) * 2000-12-13 2002-06-19 Institute Of Nuclear Energy Research, Taiwan, R.O.C. Method for liquid chromate ion and oxy-metal ions removal and stabilization
CN113072233A (en) * 2021-04-12 2021-07-06 大同氢都驰拓新能源有限公司 Treatment method for treating acid wastewater for graphite purification

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL39131A (en) * 1971-04-23 1975-08-31 Snam Progetti The purification of metal-ion containing aqueous waste liquors
DE2721994A1 (en) * 1977-04-06 1978-10-12 Bbc Brown Boveri & Cie PROCESS FOR PROCESSING AQUATIC RESIDUES FROM METALLIZING STRIPS
NO884048L (en) * 1988-09-12 1990-03-13 Cheminor As ELECTROLYSE OF COPPER IN THIN SOLUTIONS CONTAINING LARGE AMOUNTS OF IRON.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1215176A1 (en) * 2000-12-13 2002-06-19 Institute Of Nuclear Energy Research, Taiwan, R.O.C. Method for liquid chromate ion and oxy-metal ions removal and stabilization
CN113072233A (en) * 2021-04-12 2021-07-06 大同氢都驰拓新能源有限公司 Treatment method for treating acid wastewater for graphite purification

Also Published As

Publication number Publication date
DE1459451A1 (en) 1968-12-19

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