JPS6431987A - Electrolytic refining method for copper - Google Patents

Electrolytic refining method for copper

Info

Publication number
JPS6431987A
JPS6431987A JP62187329A JP18732987A JPS6431987A JP S6431987 A JPS6431987 A JP S6431987A JP 62187329 A JP62187329 A JP 62187329A JP 18732987 A JP18732987 A JP 18732987A JP S6431987 A JPS6431987 A JP S6431987A
Authority
JP
Japan
Prior art keywords
purity
cathode
electrolysis
electrolyte
value
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
JP62187329A
Other languages
Japanese (ja)
Other versions
JPH0653949B2 (en
Inventor
Koichi Tamura
Sadahiko Sanki
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.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable 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 Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP62187329A priority Critical patent/JPH0653949B2/en
Publication of JPS6431987A publication Critical patent/JPS6431987A/en
Publication of JPH0653949B2 publication Critical patent/JPH0653949B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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

PURPOSE:To deposit extremely high-purity electrolytic copper on the cathode, by keeping the pH value of an electrolyte in a specific range and carrying out electrolysis in a specific cathode current density by using an A.C.-D.C. superimposed current at the time of performing electrolysis by using an electrolyte containing copper nitrate and also using crude copper as a consumable anode. CONSTITUTION:High-purity Cu(NO3)2.3H2O is dissolved in pure water so as to be formed into an aqueous solution of 70g/l concentration, and HNO3 is added to the above aqueous solution to prepare a strongly acidic electrolyte for Cu refining in which pH value is regulated to 0.1-1.0, and then, electrolysis is carried out by using a Cu plate of ordinary grade as a consumable anode and also using high-purity Cu as a cathode. At this time, electrolytic refining is carried out by using an A.C.-D.C. superimposed current as an electric current for electrolysis and also regulating cathode current density to <=3.0A/dm<2> while maintaining the pH value of the electrolyte to 0.1-1.0 by always adding small amounts of HNO3. By this method, high-purity Cu of >99.9999% purity can be deposited on the cathode.
JP62187329A 1987-07-27 1987-07-27 Copper electrolytic refining method Expired - Lifetime JPH0653949B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62187329A JPH0653949B2 (en) 1987-07-27 1987-07-27 Copper electrolytic refining method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62187329A JPH0653949B2 (en) 1987-07-27 1987-07-27 Copper electrolytic refining method

Publications (2)

Publication Number Publication Date
JPS6431987A true JPS6431987A (en) 1989-02-02
JPH0653949B2 JPH0653949B2 (en) 1994-07-20

Family

ID=16204095

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62187329A Expired - Lifetime JPH0653949B2 (en) 1987-07-27 1987-07-27 Copper electrolytic refining method

Country Status (1)

Country Link
JP (1) JPH0653949B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102534657A (en) * 2012-02-17 2012-07-04 重庆重冶铜业有限公司 Method for treating waste electrolyte in process of producing cathode copper
CN114293227A (en) * 2021-12-16 2022-04-08 虹华科技股份有限公司 Processing technology of high-purity copper product for aerospace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102534657A (en) * 2012-02-17 2012-07-04 重庆重冶铜业有限公司 Method for treating waste electrolyte in process of producing cathode copper
CN114293227A (en) * 2021-12-16 2022-04-08 虹华科技股份有限公司 Processing technology of high-purity copper product for aerospace

Also Published As

Publication number Publication date
JPH0653949B2 (en) 1994-07-20

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