JPS55107742A - Separation-recovering method for valuable metal from plating sludge - Google Patents

Separation-recovering method for valuable metal from plating sludge

Info

Publication number
JPS55107742A
JPS55107742A JP1475779A JP1475779A JPS55107742A JP S55107742 A JPS55107742 A JP S55107742A JP 1475779 A JP1475779 A JP 1475779A JP 1475779 A JP1475779 A JP 1475779A JP S55107742 A JPS55107742 A JP S55107742A
Authority
JP
Japan
Prior art keywords
iron
acid
valuable metals
soln
hydroxides
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
JP1475779A
Other languages
Japanese (ja)
Inventor
Tadayoshi Tanaka
Tamotsu Tanaka
Mitsugi Miura
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.)
Miura Engineering International Co Ltd
Original Assignee
Miura Engineering International 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 Miura Engineering International Co Ltd filed Critical Miura Engineering International Co Ltd
Priority to JP1475779A priority Critical patent/JPS55107742A/en
Publication of JPS55107742A publication Critical patent/JPS55107742A/en
Pending 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

Landscapes

  • Manufacture And Refinement Of Metals (AREA)

Abstract

PURPOSE: To enhance the efficiency of recovering iron and Cr by dissolving mixed sludge of hydroxides of a plurality of valuable metals and iron hydroxide in an acid; adjusting the soln. to a specified pH range; and dissolving coprecipitated valuable metals other than iron and Cr hydroxides in an acid.
CONSTITUTION: An acid such as sulfuric acid is added to mixed sludge of hydroxides of valuable metals such as Cr, Cu, Zn and Ni and iron hydroxide to dissolve all of the metals, e.g. at pH=1. At this time, it is required that an oxidizing agent such as NaClO is added during the dissolution to convert divalent iron into trivalent iron. An alkali such as NH3 is added to the soln. to adjust the soln. to a pH value above a Cr hydroxide forming pH range and in a divalent metal hydroxide forming min. pH range, e.g. pH 5.2, thereby precipitating iron and Cr as hydroxides. An acid such as dil. sulfuric acid is then added to the precipitates to adjust the soln., e.g. to pH 3.7 and dissolve other valuable metals coprecipitated with iron and Cr. Thus, iron, Cr and other valuable metals are efficiently separated and recovered.
COPYRIGHT: (C)1980,JPO&Japio
JP1475779A 1979-02-10 1979-02-10 Separation-recovering method for valuable metal from plating sludge Pending JPS55107742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1475779A JPS55107742A (en) 1979-02-10 1979-02-10 Separation-recovering method for valuable metal from plating sludge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1475779A JPS55107742A (en) 1979-02-10 1979-02-10 Separation-recovering method for valuable metal from plating sludge

Publications (1)

Publication Number Publication Date
JPS55107742A true JPS55107742A (en) 1980-08-19

Family

ID=11869953

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1475779A Pending JPS55107742A (en) 1979-02-10 1979-02-10 Separation-recovering method for valuable metal from plating sludge

Country Status (1)

Country Link
JP (1) JPS55107742A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4343706A (en) * 1980-08-04 1982-08-10 Purdue Research Foundation Method of removing heavy metals from industrial waste streams
EP0867409A1 (en) * 1997-02-19 1998-09-30 Fundacion Inasmet Process for the recovery of metals from electrolytic surface treatment sludge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4343706A (en) * 1980-08-04 1982-08-10 Purdue Research Foundation Method of removing heavy metals from industrial waste streams
EP0867409A1 (en) * 1997-02-19 1998-09-30 Fundacion Inasmet Process for the recovery of metals from electrolytic surface treatment sludge

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