FR2396099A1 - Zinc recovery from suspensions of zinc cpds. - by electrodeposition onto aluminium cathodes from sulphuric acid-contg. electrolytes - Google Patents

Zinc recovery from suspensions of zinc cpds. - by electrodeposition onto aluminium cathodes from sulphuric acid-contg. electrolytes

Info

Publication number
FR2396099A1
FR2396099A1 FR7719852A FR7719852A FR2396099A1 FR 2396099 A1 FR2396099 A1 FR 2396099A1 FR 7719852 A FR7719852 A FR 7719852A FR 7719852 A FR7719852 A FR 7719852A FR 2396099 A1 FR2396099 A1 FR 2396099A1
Authority
FR
France
Prior art keywords
cpds
zinc
concn
electrolyte
suspensions
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.)
Granted
Application number
FR7719852A
Other languages
French (fr)
Other versions
FR2396099B1 (en
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.)
Council of Scientific and Industrial Research CSIR
Original Assignee
Council of Scientific and Industrial Research CSIR
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 Council of Scientific and Industrial Research CSIR filed Critical Council of Scientific and Industrial Research CSIR
Priority to FR7719852A priority Critical patent/FR2396099A1/en
Publication of FR2396099A1 publication Critical patent/FR2396099A1/en
Application granted granted Critical
Publication of FR2396099B1 publication Critical patent/FR2396099B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
    • C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

Zn is recovered by electrolysing a suspension of residual Zn cpds., such as froths and galvanising residues, Zn oxides or hydroxides from the chemical industry and from paints. The Zn is deposited on Al cathodes the anodes being made of a Pb-based alloy. The Zn cpds. are added continuously to the slurry to maintain the concn. of metals. The electrolyte is an aq. soln. of H2SO4 with a concn. of 5-25% an delectrolysis is carried out at a current density of 2.5-20 A/dm2 at 25-60 degrees C and with a Zn concn. in the electrolyte of 20-100 g/l. The Zn may be obtd. as a homogeneous sheet from these residues without dissolving the Zn cpds. separately e.g. by converting them into soluble salts. Thus avoiding filtration of these soln. Impurities e.g. Fe remaining in suspension can be opt. removed by decantation, sedimentation or filtering. Continuous operations can be achieved by adding Zn cpds. at predetermined intervals. The deposit has a high purity (99-99.8%). During melting higher efficiencies are achieved than with Zn deposit from alkaline suspensions. The electrolyte may be re-used several times.
FR7719852A 1977-06-28 1977-06-28 Zinc recovery from suspensions of zinc cpds. - by electrodeposition onto aluminium cathodes from sulphuric acid-contg. electrolytes Granted FR2396099A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7719852A FR2396099A1 (en) 1977-06-28 1977-06-28 Zinc recovery from suspensions of zinc cpds. - by electrodeposition onto aluminium cathodes from sulphuric acid-contg. electrolytes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7719852A FR2396099A1 (en) 1977-06-28 1977-06-28 Zinc recovery from suspensions of zinc cpds. - by electrodeposition onto aluminium cathodes from sulphuric acid-contg. electrolytes

Publications (2)

Publication Number Publication Date
FR2396099A1 true FR2396099A1 (en) 1979-01-26
FR2396099B1 FR2396099B1 (en) 1982-12-17

Family

ID=9192686

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7719852A Granted FR2396099A1 (en) 1977-06-28 1977-06-28 Zinc recovery from suspensions of zinc cpds. - by electrodeposition onto aluminium cathodes from sulphuric acid-contg. electrolytes

Country Status (1)

Country Link
FR (1) FR2396099A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2023337A1 (en) * 1968-11-11 1970-08-21 Humphreys & Glasgow Ltd
US3905882A (en) * 1974-09-25 1975-09-16 Harold G Hudson Electrolytic zinc salvaging method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2023337A1 (en) * 1968-11-11 1970-08-21 Humphreys & Glasgow Ltd
US3905882A (en) * 1974-09-25 1975-09-16 Harold G Hudson Electrolytic zinc salvaging method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CA1976 *

Also Published As

Publication number Publication date
FR2396099B1 (en) 1982-12-17

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Legal Events

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