FI812817L - FOERFARANDE FOER REGENERERING AV BETBADLOESNINGAR - Google Patents

FOERFARANDE FOER REGENERERING AV BETBADLOESNINGAR

Info

Publication number
FI812817L
FI812817L FI812817A FI812817A FI812817L FI 812817 L FI812817 L FI 812817L FI 812817 A FI812817 A FI 812817A FI 812817 A FI812817 A FI 812817A FI 812817 L FI812817 L FI 812817L
Authority
FI
Finland
Prior art keywords
solution
acid
iron
pickling
stage
Prior art date
Application number
FI812817A
Other languages
Finnish (fi)
Other versions
FI68668B (en
FI68668C (en
Inventor
Bo Gustav Valter Hedenaes
Rune John Valdemar Niklasson
Peter Emanuel Nobel
Kerstin Severina Holmkvist
Original Assignee
Boliden Ab
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 Ab filed Critical Boliden Ab
Publication of FI812817L publication Critical patent/FI812817L/en
Publication of FI68668B publication Critical patent/FI68668B/en
Application granted granted Critical
Publication of FI68668C publication Critical patent/FI68668C/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.
FI812817A 1980-01-18 1981-09-10 ADJUSTMENT OF ADJUSTMENT AVAILABLE FI68668C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE8000444 1980-01-18
SE8000444 1980-01-18
PCT/SE1981/000007 WO1981002026A1 (en) 1980-01-18 1981-01-16 A method of regenerating pickling bath solutions
SE8100007 1981-01-16

Publications (3)

Publication Number Publication Date
FI812817L true FI812817L (en) 1981-09-10
FI68668B FI68668B (en) 1985-06-28
FI68668C FI68668C (en) 1985-10-10

Family

ID=20340024

Family Applications (1)

Application Number Title Priority Date Filing Date
FI812817A FI68668C (en) 1980-01-18 1981-09-10 ADJUSTMENT OF ADJUSTMENT AVAILABLE

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)

Families Citing this family (6)

* 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
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
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
LU32047A1 (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

Also Published As

Publication number Publication date
EP0032886B1 (en) 1984-04-11
EP0032886A1 (en) 1981-07-29
WO1981002026A1 (en) 1981-07-23
FI68668B (en) 1985-06-28
DE3163015D1 (en) 1984-05-17
JPS56501886A (en) 1981-12-24
FI68668C (en) 1985-10-10
ATE7050T1 (en) 1984-04-15

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: BOLIDEN AKTIEBOLAG