FR2252422A1 - - Google Patents

Info

Publication number
FR2252422A1
FR2252422A1 FR7438583A FR7438583A FR2252422A1 FR 2252422 A1 FR2252422 A1 FR 2252422A1 FR 7438583 A FR7438583 A FR 7438583A FR 7438583 A FR7438583 A FR 7438583A FR 2252422 A1 FR2252422 A1 FR 2252422A1
Authority
FR
France
Prior art keywords
solution
value
litre
iron
cathode
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
FR7438583A
Other languages
French (fr)
Other versions
FR2252422B1 (en
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.)
Licencia Talalmanyokat Ertekesito Vallalat
Original Assignee
Licencia Talalmanyokat Ertekesito Vallalat
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 Licencia Talalmanyokat Ertekesito Vallalat filed Critical Licencia Talalmanyokat Ertekesito Vallalat
Publication of FR2252422A1 publication Critical patent/FR2252422A1/fr
Application granted granted Critical
Publication of FR2252422B1 publication Critical patent/FR2252422B1/fr
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
    • B01D61/44—Ion-selective electrodialysis
    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/36—Regeneration of waste pickling liquors
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
    • C25C1/06—Electrolytic production, recovery or refining of metals by electrolysis of solutions or iron group metals, refractory metals or manganese
    • 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

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Water Supply & Treatment (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Urology & Nephrology (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

Iron is extracted by cathodic deposition from final pickling solutions which per litre contain at most 100 g of sulphuric acid and at least 25 g of iron ions. The sulphate ions are removed electrodialytically. Salts are added to the final pickling solution to set an ammonium, magnesium or alkali metal sulphate concentration of 0.5-1.0 mol/litre. The final pickling solution is fed into the cathode compartment of an electrolytical appliance composed of cells - which contain anode and cathode compartments separated by diaphragms - and is allowed to flow through said cathode compartments, while the iron content of the solution is depleted to a value of 7-15 g Fe<++>/litre. Then the solution is passed into the anode compartment of the appliance and is moved therethrough in a direction identical to that of the flow maintained in the cathode compartment. The current density based on the area of the diaphragm is held at a value of 15-22 A/dm<2>, and the operating temperature of the electrolysis is held at a value of 70-90 DEG C.
FR7438583A 1973-11-27 1974-11-25 Expired FR2252422B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HUKE000935 HU169344B (en) 1973-11-27 1973-11-27 Method for electrochemical cycle-processing pickle end-solutions containing sulfuric acid

Publications (2)

Publication Number Publication Date
FR2252422A1 true FR2252422A1 (en) 1975-06-20
FR2252422B1 FR2252422B1 (en) 1980-08-01

Family

ID=10997755

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7438583A Expired FR2252422B1 (en) 1973-11-27 1974-11-25

Country Status (13)

Country Link
AT (1) AT332192B (en)
BE (1) BE822639A (en)
CH (1) CH610014A5 (en)
DE (2) DE2456058C2 (en)
DK (1) DK145682C (en)
FR (1) FR2252422B1 (en)
HU (1) HU169344B (en)
IT (1) IT1024914B (en)
LU (1) LU71306A1 (en)
NL (1) NL177424C (en)
NO (1) NO136303C (en)
SE (1) SE413196B (en)
YU (1) YU39931B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0087166A1 (en) * 1982-02-24 1983-08-31 Keramchemie Gesellschaft mit beschränkter Haftung Process for the electrolytic regeneration of spent sulfuric acid pickling solutions

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4740281A (en) * 1986-10-14 1988-04-26 Allied Corporation Recovery of acids from materials comprising acid and salt
DE19850525A1 (en) * 1998-11-03 2000-05-04 Eilenburger Elektrolyse & Umwelttechnik Gmbh Regeneration of sulfuric acid-iron(III) sulfate pickling solution, used especially for special steels, involves perdisulfuric acid production in a spent solution electrolysis cell
DE19850524C2 (en) * 1998-11-03 2002-04-04 Eilenburger Elektrolyse & Umwelttechnik Gmbh Nitrate-free recycling pickling process for stainless steels

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE481309A (en) * 1947-03-25

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0087166A1 (en) * 1982-02-24 1983-08-31 Keramchemie Gesellschaft mit beschränkter Haftung Process for the electrolytic regeneration of spent sulfuric acid pickling solutions

Also Published As

Publication number Publication date
NL177424C (en) 1985-09-16
YU39931B (en) 1985-06-30
CH610014A5 (en) 1979-03-30
SE413196B (en) 1980-04-28
DK145682C (en) 1983-08-08
YU314174A (en) 1982-10-31
IT1024914B (en) 1978-07-20
NO136303C (en) 1977-08-17
DE2456058A1 (en) 1975-05-28
NL177424B (en) 1985-04-16
SE7414719L (en) 1975-05-28
DK612074A (en) 1975-08-18
FR2252422B1 (en) 1980-08-01
BE822639A (en) 1975-05-27
HU169344B (en) 1976-11-27
NO136303B (en) 1977-05-09
NO744247L (en) 1975-06-23
DK145682B (en) 1983-01-24
ATA950174A (en) 1975-12-15
NL7415391A (en) 1975-05-29
AT332192B (en) 1976-09-10
LU71306A1 (en) 1975-05-28
DE2456058C2 (en) 1984-09-27
DE7439469U (en) 1976-04-29

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Legal Events

Date Code Title Description
ST Notification of lapse