JPS5757900A - Method for recycling waste chromium plating solution - Google Patents

Method for recycling waste chromium plating solution

Info

Publication number
JPS5757900A
JPS5757900A JP13208780A JP13208780A JPS5757900A JP S5757900 A JPS5757900 A JP S5757900A JP 13208780 A JP13208780 A JP 13208780A JP 13208780 A JP13208780 A JP 13208780A JP S5757900 A JPS5757900 A JP S5757900A
Authority
JP
Japan
Prior art keywords
soln
stage
waste
alkali
plating
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
JP13208780A
Other languages
Japanese (ja)
Inventor
Tadayoshi Tanaka
Seiji Omagari
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.)
KITAOOSAKA SEISOU KK
Original Assignee
KITAOOSAKA SEISOU KK
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 KITAOOSAKA SEISOU KK filed Critical KITAOOSAKA SEISOU KK
Priority to JP13208780A priority Critical patent/JPS5757900A/en
Publication of JPS5757900A publication Critical patent/JPS5757900A/en
Pending legal-status Critical Current

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  • Removal Of Specific Substances (AREA)

Abstract

PURPOSE: To recycle waste chrominum plating solns. as a plating soln. by adding a caustic alkali soln. to the waste chromium plating soln. in the 1st stage to settle and remove Cr, Fe ions, electrolyzing the filtrate thereof in the 2nd stage and causing the aq. alkali chromate soln. obtained in the cathode chamber to react with the waste plating soln. in the 3rd stage.
CONSTITUTION: A caustic alkali soln. is added to a waste chromium plating soln. in the 1st stage to turn chromic acid ions to alkali dichromate, whereby Cr, Fe ions are settled and filtered out as chromium hydroxide and ferric hydroxide. In the 2nd stage, the filtrate is electrolyzed until the soln. attains about 10pH in an electrolytic cell having a diaphragm plate, whereby a chromic acid of high purity is obtained in the anode chamber and an alkali chromate soln. in the cathode chamber. In the 3rd stage, said alkali chromate soln. is caused to react with the waste plating soln. to again convert it to an alkali dichromate soln., whereby the impure metals in the waste soln. are settled and removed in the same manner as in the 1st stage and the filtrate is used as a regenerated plating soln.
COPYRIGHT: (C)1982,JPO&Japio
JP13208780A 1980-09-22 1980-09-22 Method for recycling waste chromium plating solution Pending JPS5757900A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13208780A JPS5757900A (en) 1980-09-22 1980-09-22 Method for recycling waste chromium plating solution

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13208780A JPS5757900A (en) 1980-09-22 1980-09-22 Method for recycling waste chromium plating solution

Publications (1)

Publication Number Publication Date
JPS5757900A true JPS5757900A (en) 1982-04-07

Family

ID=15073186

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13208780A Pending JPS5757900A (en) 1980-09-22 1980-09-22 Method for recycling waste chromium plating solution

Country Status (1)

Country Link
JP (1) JPS5757900A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000005438A1 (en) * 1998-07-21 2000-02-03 Fernz Timber Protection Limited Electrochemical conversion of transition metal cations to anions at a higher oxidation state
WO2002036839A1 (en) * 2000-10-30 2002-05-10 Benedict Pisicescu Method and installation of metal retrieving from used chroming solutions

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000005438A1 (en) * 1998-07-21 2000-02-03 Fernz Timber Protection Limited Electrochemical conversion of transition metal cations to anions at a higher oxidation state
WO2002036839A1 (en) * 2000-10-30 2002-05-10 Benedict Pisicescu Method and installation of metal retrieving from used chroming solutions

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