ATE7050T1 - METHOD OF REGENERATION OF PICKLING SOLUTIONS. - Google Patents

METHOD OF REGENERATION OF PICKLING SOLUTIONS.

Info

Publication number
ATE7050T1
ATE7050T1 AT81850009T AT81850009T ATE7050T1 AT E7050 T1 ATE7050 T1 AT E7050T1 AT 81850009 T AT81850009 T AT 81850009T AT 81850009 T AT81850009 T AT 81850009T AT E7050 T1 ATE7050 T1 AT E7050T1
Authority
AT
Austria
Prior art keywords
solution
acid
iron
pickling
stage
Prior art date
Application number
AT81850009T
Other languages
German (de)
Inventor
Bo Gustaf Valter Hedenaes
Rune John Valdemar Niklasson
Kerstin Severina Holmkvist
Peter Emanuel Nobel
Original Assignee
Boliden Aktiebolag
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 Boliden Aktiebolag filed Critical Boliden Aktiebolag
Application granted granted Critical
Publication of ATE7050T1 publication Critical patent/ATE7050T1/en

Links

Classifications

    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Television Signal Processing For Recording (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention relates to a method for regenerating by crystallization on cooling picking bath solutions based on sulphuric acid or hydrochloric acid and used for pickling iron, steel and other iron alloys. According to the invention the bath solution is regenerated in a combination of three stages. In a first stage acid is added to the solution in a concentration higher than the acid concentration of said solution, and the content of phosphoric acid is adjusted to be maintained between about 0.01 and 1 mole per litre solution, thereby to approach or to exceed the solubility of difficultly dissolved iron salts corresponding to the acid. In a second stage the solution is cooled, whereby iron salts precipitate. The cooling process is effected so as to reach a temperature at which the contents of iron and acid in the residual solution are suitable to permit said solution to be used again for pickling purposes. In a third stage the precipitated iron salt is removed from the solution, whereafter the regenerated pickling solution is returned for use at the pickling process.
AT81850009T 1980-01-18 1981-01-16 METHOD OF REGENERATION OF PICKLING SOLUTIONS. ATE7050T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8000444 1980-01-18
EP81850009A EP0032886B1 (en) 1980-01-18 1981-01-16 A method of regenerating pickling solutions

Publications (1)

Publication Number Publication Date
ATE7050T1 true ATE7050T1 (en) 1984-04-15

Family

ID=20340024

Family Applications (1)

Application Number Title Priority Date Filing Date
AT81850009T ATE7050T1 (en) 1980-01-18 1981-01-16 METHOD OF REGENERATION OF PICKLING SOLUTIONS.

Country Status (6)

Country Link
EP (1) EP0032886B1 (en)
JP (1) JPS56501886A (en)
AT (1) ATE7050T1 (en)
DE (1) DE3163015D1 (en)
FI (1) FI68668C (en)
WO (1) WO1981002026A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3422284A1 (en) * 1983-08-17 1985-03-07 Georg Fischer AG, Schaffhausen, CH, Niederlassung: Georg Fischer AG, 7700 Singen Connecting member, in particular a connecting rod or shackle

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE452481B (en) * 1985-03-19 1987-11-30 Korrosionsforskning Ab METHOD OF REGULATING BEDBATH AND REGENABLE SOLUTION FOR BETTING IRON AND STEEL FORM
NL9302035A (en) * 1993-11-24 1995-06-16 Piet De Vries Pickling method and a device therefor.
US5591527A (en) * 1994-11-02 1997-01-07 Minnesota Mining And Manufacturing Company Optical security articles and methods for making same
US20020005210A1 (en) * 2000-01-05 2002-01-17 Olsen Douglas R. Regenerating spent pickling liquor
EP1522522B2 (en) * 2003-10-06 2012-03-07 Kerr-McGee Pigments GmbH Method for the processing of iron-contaminated waste sulphuric acid
CN103014737A (en) * 2011-09-22 2013-04-03 河南红日锂能源科技有限公司 Cold-rolled steel pickling waste acid treatment method

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU152603A3 (en) * 1900-01-01
US1279331A (en) * 1918-05-11 1918-09-17 James H Gravell Pickling iron and steel.
US1589610A (en) * 1925-07-08 1926-06-22 American Copperas Company Method of reclaiming spent pickling solutions
DE561514C (en) * 1929-10-22 1932-10-14 Ferdinand Fraensemeier Process for the treatment of sulphurous iron pickling liquors with the extraction of anhydrous iron sulphate
FR723484A (en) * 1931-08-03 1932-04-09 Zahn & Co G M B H Process for the continuous cycle use of sulfuric acid pickling liquors with recovery of free sulfuric acid from the final pickling solutions
US2118802A (en) * 1936-01-30 1938-05-31 Zahn & Co G M B H Method of conserving pickling liquor
US2155854A (en) * 1937-05-26 1939-04-25 American Rolling Mill Co Pickling process
US2559445A (en) * 1946-12-12 1951-07-03 Union Switch & Signal Co Method for removing scale from steel
BE483353A (en) * 1947-06-25
BE518181A (en) * 1952-03-13
DE1124781B (en) * 1958-03-31 1962-03-01 Peter Niedner Dipl Ing Process for the processing of sulphate ferrous liquors
AT247104B (en) * 1963-09-02 1966-05-25 Othmar Ing Ruthner Process for regenerating hydrochloric iron pickles
GB1102463A (en) * 1963-12-13 1968-02-07 Molbros Ltd Improvements in or relating to a process for the treatment of spent acid liquors
DE1621580A1 (en) * 1966-07-14 1971-05-13 Gewerk Keramchemie Process and device for the continuous precipitation of iron from sulfuric acid pickling baths
US3635664A (en) * 1969-08-20 1972-01-18 Daido Chem Eng Corp REGENERATION OF HYDROCHLORIC ACID PICKLING WASTE BY H{11 SO{11 {0 ADDITION, DISTILLATION AND FeSO{11 {0 Precipitation
DE2209954A1 (en) * 1972-03-02 1973-09-06 Helmut Babbel Regenerating spent pickling liquor - with continuous cooling and automatic switching for separation of ferrous sulphate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3422284A1 (en) * 1983-08-17 1985-03-07 Georg Fischer AG, Schaffhausen, CH, Niederlassung: Georg Fischer AG, 7700 Singen Connecting member, in particular a connecting rod or shackle

Also Published As

Publication number Publication date
FI68668B (en) 1985-06-28
JPS56501886A (en) 1981-12-24
EP0032886B1 (en) 1984-04-11
WO1981002026A1 (en) 1981-07-23
FI68668C (en) 1985-10-10
FI812817L (en) 1981-09-10
EP0032886A1 (en) 1981-07-29
DE3163015D1 (en) 1984-05-17

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee