JPS5613095A - Removing method of chromium compound in leather sludge - Google Patents

Removing method of chromium compound in leather sludge

Info

Publication number
JPS5613095A
JPS5613095A JP8694179A JP8694179A JPS5613095A JP S5613095 A JPS5613095 A JP S5613095A JP 8694179 A JP8694179 A JP 8694179A JP 8694179 A JP8694179 A JP 8694179A JP S5613095 A JPS5613095 A JP S5613095A
Authority
JP
Japan
Prior art keywords
aqueous solution
washing
leather sludge
bivalent
separated
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
JP8694179A
Other languages
Japanese (ja)
Inventor
Hirofumi Tanaka
Katsuhiro Suzuki
Yoshibumi Fujimori
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.)
Sumitomo Cement Co Ltd
Original Assignee
Sumitomo Cement 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 Sumitomo Cement Co Ltd filed Critical Sumitomo Cement Co Ltd
Priority to JP8694179A priority Critical patent/JPS5613095A/en
Publication of JPS5613095A publication Critical patent/JPS5613095A/en
Pending legal-status Critical Current

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  • Treatment Of Sludge (AREA)

Abstract

PURPOSE: To perform titled removal at a high removal rate by washing leather sludge with an aqueous solution of sulfuric acid or bivalent (oxy)carboxylic acid or their salts, adding an EDTA reagent if necessary to the washing residue separated, thereby washing and separating the same.
CONSTITUTION: Leather sludge is added with (1) an aqueous solution of a sulfuric acid or its alkaline metal sald, (2) an aqueous solution of a bivalent carboxylic acid or its alkaline metal salt or (3) an aqueous solution of a bivalent oxycarboxylic acid or its alkaline metal salt, and a mixture is washed with stirring. The washing residue thereof is separated. Further, if necessary, an EDTA chelate reagent is added to the washing residue of the above-mentioned (2) or (3) and the mixture is washed and separated, then the tervalent chromium compound in the leather sludge is removed at a high removal rate.
COPYRIGHT: (C)1981,JPO&Japio
JP8694179A 1979-07-11 1979-07-11 Removing method of chromium compound in leather sludge Pending JPS5613095A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8694179A JPS5613095A (en) 1979-07-11 1979-07-11 Removing method of chromium compound in leather sludge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8694179A JPS5613095A (en) 1979-07-11 1979-07-11 Removing method of chromium compound in leather sludge

Publications (1)

Publication Number Publication Date
JPS5613095A true JPS5613095A (en) 1981-02-07

Family

ID=13900886

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8694179A Pending JPS5613095A (en) 1979-07-11 1979-07-11 Removing method of chromium compound in leather sludge

Country Status (1)

Country Link
JP (1) JPS5613095A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998003685A1 (en) * 1996-07-18 1998-01-29 Wojciech Lasek Process for the removal of chromium from leathers and/or leather wastes, both tanned with chromium compounds, and/or different substances containing chromium compounds, in particular wastes of the collageneous origin
WO2003031352A1 (en) * 2001-10-01 2003-04-17 Setsu Anzai Leather waste treatment system
CN112159054A (en) * 2020-10-09 2021-01-01 天津城建大学 Method for removing heavy metal Cd in sludge by EDTA elution centrifugation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS526879A (en) * 1975-07-04 1977-01-19 Aisin Seiki Co Ltd Anti-skid control mechanism

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS526879A (en) * 1975-07-04 1977-01-19 Aisin Seiki Co Ltd Anti-skid control mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998003685A1 (en) * 1996-07-18 1998-01-29 Wojciech Lasek Process for the removal of chromium from leathers and/or leather wastes, both tanned with chromium compounds, and/or different substances containing chromium compounds, in particular wastes of the collageneous origin
WO2003031352A1 (en) * 2001-10-01 2003-04-17 Setsu Anzai Leather waste treatment system
CN112159054A (en) * 2020-10-09 2021-01-01 天津城建大学 Method for removing heavy metal Cd in sludge by EDTA elution centrifugation

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