DE59103815D1 - METHOD AND DEVICE FOR REGENERATING ALUMINUM ALUMINUM SOLUTIONS CONTAINING ALKALINE. - Google Patents

METHOD AND DEVICE FOR REGENERATING ALUMINUM ALUMINUM SOLUTIONS CONTAINING ALKALINE.

Info

Publication number
DE59103815D1
DE59103815D1 DE59103815T DE59103815T DE59103815D1 DE 59103815 D1 DE59103815 D1 DE 59103815D1 DE 59103815 T DE59103815 T DE 59103815T DE 59103815 T DE59103815 T DE 59103815T DE 59103815 D1 DE59103815 D1 DE 59103815D1
Authority
DE
Germany
Prior art keywords
pickling
aluminum
aluminium
pickling bath
regenerating
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.)
Expired - Fee Related
Application number
DE59103815T
Other languages
German (de)
Inventor
Dieter Brodalla
Roland Fransson
Herbert Breunig
Michael Ferner
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.)
FERNER, MICHAEL, 89423 GUNDELFINGEN, DE
Original Assignee
Gartner & Co J
Josef Gartner and Co
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 Gartner & Co J, Josef Gartner and Co filed Critical Gartner & Co J
Application granted granted Critical
Publication of DE59103815D1 publication Critical patent/DE59103815D1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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

Abstract

In a process for regenerating alkaline solutions for pickling aluminium, in which aluminium hydroxide is recovered, a pickling solution containing alkali hydroxide, aluminate, a complex builder and other additives is transferred from a pickling bath into a reactor section consisting of at least one reactor, where aluminium is precipitated as aluminium hydroxide. The temperature of the pickling bath is higher than that of the reactor section. The process is operated so that the concentration of aluminate, alkali and gluconate and the temperature in the pickling bath, on the one hand, and the temperature drop from the pickling bath to the reactor section, on the other hand, are adjusted so that the pickling solution in the pickling bath is undersaturated or metastably supersaturated in relation to the precipitation of aluminium hydroxide but unstably supersaturated in the reaction section. A device for carrying out the process of the invention is also disclosed.
DE59103815T 1990-03-15 1991-03-15 METHOD AND DEVICE FOR REGENERATING ALUMINUM ALUMINUM SOLUTIONS CONTAINING ALKALINE. Expired - Fee Related DE59103815D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4008379A DE4008379A1 (en) 1990-03-15 1990-03-15 METHOD AND SYSTEM FOR REGENERATING ALUMINUM ALUMINUM SOLUTIONS WITH ALKALINE
PCT/EP1991/000491 WO1991014019A2 (en) 1990-03-15 1991-03-15 Process and device for regenerating alkaline solutions for pickling aluminium

Publications (1)

Publication Number Publication Date
DE59103815D1 true DE59103815D1 (en) 1995-01-19

Family

ID=6402324

Family Applications (2)

Application Number Title Priority Date Filing Date
DE4008379A Granted DE4008379A1 (en) 1990-03-15 1990-03-15 METHOD AND SYSTEM FOR REGENERATING ALUMINUM ALUMINUM SOLUTIONS WITH ALKALINE
DE59103815T Expired - Fee Related DE59103815D1 (en) 1990-03-15 1991-03-15 METHOD AND DEVICE FOR REGENERATING ALUMINUM ALUMINUM SOLUTIONS CONTAINING ALKALINE.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE4008379A Granted DE4008379A1 (en) 1990-03-15 1990-03-15 METHOD AND SYSTEM FOR REGENERATING ALUMINUM ALUMINUM SOLUTIONS WITH ALKALINE

Country Status (5)

Country Link
EP (1) EP0519987B1 (en)
JP (1) JPH05505852A (en)
AT (1) ATE115197T1 (en)
DE (2) DE4008379A1 (en)
WO (1) WO1991014019A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5656489A (en) * 1992-07-22 1997-08-12 E. I. Du Pont De Nemours And Company Method for the remediation of organoleads especially tetraethyllead (TEL) in contaminated natural media
DE102008001577A1 (en) * 2008-05-06 2009-11-12 Wacker Chemie Ag Process for the hydrolysis of solid metal salts with aqueous salt solutions
WO2010060408A2 (en) * 2008-11-03 2010-06-03 Koenig Thomas Pickling method and pickling plant

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE43977C (en) * 1892-01-31 1888-08-03 Dr. K. J. BAYER in Dorf Tentelewa bei St. Petersburg PROCESS FOR PREPARATION OF THONDEHYDRATE AND ALKALINE ALUMINATE
US2975041A (en) * 1956-08-06 1961-03-14 Purex Corp Ltd Method for etching aluminum and aluminum alloy bodies
FR2167243A1 (en) * 1972-01-11 1973-08-24 Maltret Georges Regenerating etch bath - for etching aluminium prior to anodising
US3909405A (en) * 1972-04-07 1975-09-30 Dai Doh Plant Engineering Corp Method for treating alkaline waste streams containing aluminum dissolved therein
DE2433141A1 (en) * 1974-07-10 1976-01-29 Kannegiesser H Kg Heated fabric cylinder - has collar heaters for ring pockets with steel wool to foam the heating fluid
US4136026A (en) * 1977-11-23 1979-01-23 Aluminum Company Of America Caustic solution having controlled dissolved aluminum content
JPS5810895B2 (en) * 1979-07-16 1983-02-28 東京計装株式会社 data acquisition circuit
EP0157190B1 (en) * 1984-03-16 1990-07-18 Prof. Dr. E. Plattner Etching process for aluminium
US4826605A (en) * 1986-11-03 1989-05-02 Caspian International, Inc. Process for depleted chemical milling solutions

Also Published As

Publication number Publication date
EP0519987A1 (en) 1992-12-30
DE4008379C2 (en) 1992-01-16
EP0519987B1 (en) 1994-12-07
WO1991014019A3 (en) 1991-10-31
WO1991014019A2 (en) 1991-09-19
JPH05505852A (en) 1993-08-26
ATE115197T1 (en) 1994-12-15
DE4008379A1 (en) 1991-09-19

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: FERNER, MICHAEL, 89423 GUNDELFINGEN, DE

8339 Ceased/non-payment of the annual fee