DE1621577A1 - Process for the selective removal of zinc ions from strongly hydrochloric iron pickles - Google Patents
Process for the selective removal of zinc ions from strongly hydrochloric iron picklesInfo
- Publication number
- DE1621577A1 DE1621577A1 DE19661621577 DE1621577A DE1621577A1 DE 1621577 A1 DE1621577 A1 DE 1621577A1 DE 19661621577 DE19661621577 DE 19661621577 DE 1621577 A DE1621577 A DE 1621577A DE 1621577 A1 DE1621577 A1 DE 1621577A1
- Authority
- DE
- Germany
- Prior art keywords
- iron
- zinc ions
- zinc
- pickles
- selective removal
- 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
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J41/00—Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
- B01J41/20—Anion exchangers for chromatographic processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/01—Chlorine; Hydrogen chloride
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
- C01G9/003—Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Analytical Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
Verfahren zur selektiven Entfernung von Zinkionen aus stark salzsauren Eisenbeizen Die seiektive Abscheidung von Zink aus stark salzsauren Eisenbeizen mit Gehalten z.B. von Salzsäure bis 20 ß sowie Eisengehalten bis 20 g Fe /1 ist infolge der unbeschränkten Löslichkeit von Zinkchlorid in derartigen Beizlösungen sowie in Anbetracht der Stellung des Zinks in der elektrochemischen Spannungsreihe der Elemente gegenüber Eisen bisher nicht möglich.Process for the selective removal of zinc ions from strongly hydrochloric acids Iron pickling The selective separation of zinc from strongly hydrochloric iron pickling with contents e.g. of hydrochloric acid up to 20 ß and iron contents up to 20 g Fe / 1 due to the unlimited solubility of zinc chloride in such pickling solutions as well as considering the position of the zinc in the electrochemical series of the elements compared to iron not yet possible.
Üblicherweise ist die Aufgabenstellung für die Lösung derartiger Probleme allgemein derart gelagert, daß wie im Trennungsgang der Elemente das Zink nach den anderen Metallionen abgetrennt wird oder mit anderen Metallen zusammen niedergeschlagen wird wie z. B. auch beim elektrochemischen Plattieren, mit Messing aus cyankalischer Lösung in der Galvanotechnik.Usually the task is to solve such problems generally stored in such a way that, as in the separation of the elements, the zinc after the separated from other metal ions or precipitated together with other metals is like B. also in electrochemical plating, with brass from cyankalic Solution in electroplating.
Eine völlig andere Aufgabenstellung ergibt sich für- die Aufbereitung von in der Technik üblichen Beizbadlösungen mit den vorerwähnten Konzentrationen an Eisen im Bereich bis 120 g Fe il bzw. mit Gehalten an Salzsäure bis zu 20 %, wie sie z. B. in Verzinkereien anfallen. In derartigen Lösungen liegt meist eine bestimmte Menge an Zinkionen vor, die vom Entzinken von feuerverzinkten Gegenstanden in den betreffenden Beizbädern herrührt.A completely different task arises for the preparation of pickling bath solutions customary in technology with the aforementioned concentrations of iron in the range up to 120 g Fe il or with a content of hydrochloric acid up to 20%, how they z. B. occur in galvanizing plants. In such solutions there is usually one certain amount of zinc ions that are produced by the dezincification of hot-dip galvanized objects originates in the pickling baths concerned.
Die Aufbereitung der vorgenannten Beizbäder mit dem Ziel einer Wiedergewinnung
von Salzsäure bzw. einer Abscheidung von Fe203 spielt sich bekanntlloh in einem
hohen Temperaturbereich ab, in dem die hydrolytische Spaltung des Eisenchlorids
zu Fe2O3 und Salzsäure erfolgt. Zinkchlorid wird dabei im Gegensatz zu Eisenchlorid
nicht hydrolytisch zersetzt, sondern dampft bei + 73o OC unzersetzt ab. Da nach
erfolgter
Kondensation das Zinkohlorid praktisch wieder sich in der regenerierten Salzsäurelösung
auflöst, ist eine Ausscheidung des Zinks auf diese Weise nicht möglich. Gleichzeitig
besteht die
Die aufgegriffene Aufgabenstellung erfordert somit die Auffindung. neuer Wege Tür die Trennung von Zink und Eisen mit Umkehrung der bekannten Verhältnisse und selektiver Entfernung von Zinkionen aus salzsauren Beizlösungen, bevor diese dem hydrolytischen Regenerierungsprozeß unterworfen-- werden.The task at hand thus requires the discovery. new ways door the separation of zinc and iron with reversal of the known relationships and selective removal of zinc ions from hydrochloric acid pickling solutions before these subjected to the hydrolytic regeneration process.
Es wurde gefunden, daß eine selektive Entfernung von Zinkionen aus Eisenbeizen mit Gehalten bis zu 20 20'HCl sowie bis zu 120 g Fe /1 durch Verwendung anionenaktiver Ionenaustauscher möglich wird-0 Die Methode spricht auf alle in der Beiztechnik üblichen salzsauren Beizlösungen mit unterschiedlichen Zinkgehalten einwandfrei an.It has been found that there is selective removal of zinc ions from Iron pickling with contents of up to 20 20'HCl and up to 120 g Fe / 1 through use anion-active ion exchanger becomes possible-0 The method speaks to everyone in the Pickling technology common hydrochloric acid pickling solutions with different zinc contents flawlessly.
Die Möglichkeit einer selektiven, Trennung von Zinkionen in Gegenwart von Eisenionen in einem Konzent rat i onsbere i ch an Salzsäure bis zu 150 g /1 ist völlig überraschend, da bisher gemäß dem Stand der Technik sowohl gänzlich andere Konzentrationsverhältnis-se an freier Säure als Voraussetzung für die Aktivität von Austauscherharzen generell angenommen wird und insbesondere eine Trennung von Eisen und Zink bisher unter diesen Bedingungen für unmöglich gehalten wird. Die selektive Entfernung der Zinkionen mittels anionenaktiver Ionenaustæuscher kann beim erfindungsgemäßen Verfahren in üblichen Ionenaustauscheranlagen vorgenommen werden.The possibility of a selective, separation of zinc ions in the presence of iron ions in a concentration range of hydrochloric acid up to 150 g / l is completely surprising, since so far both completely different according to the prior art Concentration ratios of free acid as a prerequisite for activity of exchange resins is generally accepted and in particular a separation of Iron and zinc had previously been considered impossible under these conditions. the selective removal of zinc ions by means of anion-active ion exchangers carried out in the process according to the invention in conventional ion exchange systems will.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG0045793 | 1966-01-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1621577A1 true DE1621577A1 (en) | 1971-07-08 |
Family
ID=7127838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19661621577 Pending DE1621577A1 (en) | 1966-01-22 | 1966-01-22 | Process for the selective removal of zinc ions from strongly hydrochloric iron pickles |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1621577A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2307880A1 (en) * | 1975-04-18 | 1976-11-12 | Penarroya Miniere Metallurg | Separating iron chloride from zinc chloride - esp. in the treatment of pickling solns. in the electroplating industry |
WO1981000728A1 (en) * | 1979-09-13 | 1981-03-19 | L Rennerfelt | Purification process for spent pickling baths |
EP0141313A1 (en) * | 1983-10-21 | 1985-05-15 | Norsk Hydro Chemtech GmbH | Process for the regeneration of hydrochloric acid-based pickles containing iron and zinc |
US5051186A (en) * | 1989-02-06 | 1991-09-24 | Prior Engineering Ag | Method of processing acidic Fe-containing solutions |
DE4204892A1 (en) * | 1992-02-19 | 1993-08-26 | Wiegel Verwaltung Gmbh & Co | Iron and zinc salts sepn. from acid etching soln. - by using organic extn. agent to remove zinc salt and sulphate ion producing agent to convert salt into insol. zinc sulphate, for pure prods. |
EP0575699A2 (en) * | 1992-06-10 | 1993-12-29 | Heraeus Elektrochemie Gmbh | Process and apparatus for regenerating metal ions and sulfuric acid containing aqueous solutions and use thereof |
EP0722001A1 (en) * | 1995-01-12 | 1996-07-17 | Bammens Groep B.V. | A method of selectively removing zinc from acid effluents |
WO1996027556A1 (en) * | 1995-03-03 | 1996-09-12 | Kemira Kemi Aktiebolag | Purification of metal containing solutions |
-
1966
- 1966-01-22 DE DE19661621577 patent/DE1621577A1/en active Pending
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2307880A1 (en) * | 1975-04-18 | 1976-11-12 | Penarroya Miniere Metallurg | Separating iron chloride from zinc chloride - esp. in the treatment of pickling solns. in the electroplating industry |
WO1981000728A1 (en) * | 1979-09-13 | 1981-03-19 | L Rennerfelt | Purification process for spent pickling baths |
EP0141313A1 (en) * | 1983-10-21 | 1985-05-15 | Norsk Hydro Chemtech GmbH | Process for the regeneration of hydrochloric acid-based pickles containing iron and zinc |
US5051186A (en) * | 1989-02-06 | 1991-09-24 | Prior Engineering Ag | Method of processing acidic Fe-containing solutions |
AT398986B (en) * | 1989-02-06 | 1995-02-27 | Prior Eng Ag | METHOD FOR THE PROCESSING OF ACIDS, FE-CONTAINING SOLUTIONS, IN PARTICULAR WASTE STICKING SOLUTIONS |
DE4204892A1 (en) * | 1992-02-19 | 1993-08-26 | Wiegel Verwaltung Gmbh & Co | Iron and zinc salts sepn. from acid etching soln. - by using organic extn. agent to remove zinc salt and sulphate ion producing agent to convert salt into insol. zinc sulphate, for pure prods. |
EP0575699A3 (en) * | 1992-06-10 | 1994-06-01 | Heraeus Elektrochemie | Process and apparatus for regenerating metal ions and sulfuric acid containing aqueous solutions and use thereof |
EP0575699A2 (en) * | 1992-06-10 | 1993-12-29 | Heraeus Elektrochemie Gmbh | Process and apparatus for regenerating metal ions and sulfuric acid containing aqueous solutions and use thereof |
EP0722001A1 (en) * | 1995-01-12 | 1996-07-17 | Bammens Groep B.V. | A method of selectively removing zinc from acid effluents |
NL9500065A (en) * | 1995-01-12 | 1996-08-01 | Bammens Groep B V | Method for selectively removing zinc from acidic waste streams. |
US6132621A (en) * | 1995-01-12 | 2000-10-17 | Bammens Groep B.V. | Method of selectively removing zinc from acid effluents |
WO1996027556A1 (en) * | 1995-03-03 | 1996-09-12 | Kemira Kemi Aktiebolag | Purification of metal containing solutions |
US5968229A (en) * | 1995-03-03 | 1999-10-19 | Kemira Kemi Ab | Purification of metal containing solutions |
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