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JPS57188691A - Recovering method for gold from waste liquid of stripping of gold plating - Google Patents

Recovering method for gold from waste liquid of stripping of gold plating

Info

Publication number
JPS57188691A
JPS57188691A JP7161081A JP7161081A JPS57188691A JP S57188691 A JPS57188691 A JP S57188691A JP 7161081 A JP7161081 A JP 7161081A JP 7161081 A JP7161081 A JP 7161081A JP S57188691 A JPS57188691 A JP S57188691A
Authority
JP
Japan
Prior art keywords
liquid
gold
stripping
waste liquid
current efficiency
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.)
Pending
Application number
JP7161081A
Other languages
Japanese (ja)
Inventor
Masao Konno
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7161081A priority Critical patent/JPS57188691A/en
Publication of JPS57188691A publication Critical patent/JPS57188691A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/46—Regeneration of etching compositions
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • ing And Chemical Polishing (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

PURPOSE: To recover gold easily with good current efficiency in the stage of recovering the gold in waste liquid of stripping of gold plating which is alkaline and contains free CN ions by electrolysis by adding H2O2 beforehand to said liquid and heating the liquid then controlling its pH.
CONSTITUTION: ≥0.1wt% H2O2 is added to the waste liquid of stripping of gold plating which contains free CN- in an alkaline bath and contains ≥1 component of any of Cu, Ni, Fe in 10ppm liquid concns. and the liquid is heated for ≥5min at 30W90°C. Further, this liquid is neutralized with an acidic chemical such as phosphoric acid to control its pH to 1.5W6.5, after which it is electrolyzed. Here, if the heat treatment temp. is below the lower limit, the reaction is slow, and is in excess of the upper limit, the rate of evaporation is too high and these are undesirable. The free CN- is decomposed by H2O2 and the excess H2O2 is decomposed in the presence of a catalyst such as copper of Ni by the subsequent heating, whereby the decrease in current efficiency is prevented and further the decrease in the current efficiency owing to alkalinity is prevented by the neutralization.
COPYRIGHT: (C)1982,JPO&Japio
JP7161081A 1981-05-13 1981-05-13 Recovering method for gold from waste liquid of stripping of gold plating Pending JPS57188691A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7161081A JPS57188691A (en) 1981-05-13 1981-05-13 Recovering method for gold from waste liquid of stripping of gold plating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7161081A JPS57188691A (en) 1981-05-13 1981-05-13 Recovering method for gold from waste liquid of stripping of gold plating

Publications (1)

Publication Number Publication Date
JPS57188691A true JPS57188691A (en) 1982-11-19

Family

ID=13465586

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7161081A Pending JPS57188691A (en) 1981-05-13 1981-05-13 Recovering method for gold from waste liquid of stripping of gold plating

Country Status (1)

Country Link
JP (1) JPS57188691A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006176814A (en) * 2004-12-21 2006-07-06 Asahi Pretec Corp METHOD FOR COLLECTING Au FROM CYANOGEN-CONTAINING AQUEOUS SOLUTION AND APPARATUS THEREFOR
JP2007002310A (en) * 2005-06-24 2007-01-11 Asahi Pretec Corp Method for collecting gold and apparatus therefor
KR100999893B1 (en) 2008-03-10 2010-12-09 아사히 프리텍 가부시키가이샤 METHOD FOR RECOVERING Au
CN108374090A (en) * 2018-03-28 2018-08-07 广东致卓环保科技有限公司 A kind of gold refinement method applied to the gold-plated waste liquid of sulfurous acid system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006176814A (en) * 2004-12-21 2006-07-06 Asahi Pretec Corp METHOD FOR COLLECTING Au FROM CYANOGEN-CONTAINING AQUEOUS SOLUTION AND APPARATUS THEREFOR
JP2007002310A (en) * 2005-06-24 2007-01-11 Asahi Pretec Corp Method for collecting gold and apparatus therefor
JP4699105B2 (en) * 2005-06-24 2011-06-08 アサヒプリテック株式会社 Gold recovery method and apparatus
KR100999893B1 (en) 2008-03-10 2010-12-09 아사히 프리텍 가부시키가이샤 METHOD FOR RECOVERING Au
CN108374090A (en) * 2018-03-28 2018-08-07 广东致卓环保科技有限公司 A kind of gold refinement method applied to the gold-plated waste liquid of sulfurous acid system
CN108374090B (en) * 2018-03-28 2019-07-12 广东致卓环保科技有限公司 A kind of gold refinement method applied to the gold-plated waste liquid of sulfurous acid system

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