EP0156721A1 - Verfahren zur Herstellung von feinen und ultrafeinen Zinkpulvern durch Elektrolyse in basischem Medium - Google Patents

Verfahren zur Herstellung von feinen und ultrafeinen Zinkpulvern durch Elektrolyse in basischem Medium Download PDF

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Publication number
EP0156721A1
EP0156721A1 EP85400470A EP85400470A EP0156721A1 EP 0156721 A1 EP0156721 A1 EP 0156721A1 EP 85400470 A EP85400470 A EP 85400470A EP 85400470 A EP85400470 A EP 85400470A EP 0156721 A1 EP0156721 A1 EP 0156721A1
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EP
European Patent Office
Prior art keywords
zinc
electrolysis
powders
fine
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
EP85400470A
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English (en)
French (fr)
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EP0156721B1 (de
Inventor
Jean-Michel Castillo
Christian Jankowski
Serge Ferlay
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.)
Promotion Des Procedes Hydro-Metallurgiques SA Ste
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Promotion Des Procedes Hydro-Metallurgiques SA Ste
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Publication of EP0156721A1 publication Critical patent/EP0156721A1/de
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C5/00—Electrolytic production, recovery or refining of metal powders or porous metal masses
    • C25C5/02—Electrolytic production, recovery or refining of metal powders or porous metal masses from solutions

Definitions

  • the present invention relates to a process for the production of fine and ultrafine zinc powders by electrolysis in basic medium.
  • the zinc powders currently marketed are obtained thermally, by fusion, and vaporization under vacuum of zinc liroots. They provide a fairly wide range of production, from coarse zinc powder to fine and ultra-fine zinc dust.
  • the powders obtained by alkaline electrolysis must be ground to approach the particle size standards of the powders obtained by thermal means.
  • the size of the grains obtained essentially depends on the speed ratio of these two processes. If the nucleation rate is higher than the growth rate of the crystal, the deposit will be fine and vice versa. The crystals will grow quickly and will therefore be coarse, if the metal-ions arriving at the solid-liquid interface are numerous. On the other hand, the nucleation centers will be abundant and the crystals will grow slowly and will therefore be fine, if the metal ions arriving at the solid l liquid interface are rare.
  • electrolysis involves relationships between the current, the electrolyte and the electrodes.
  • the study of the cathode has always been seen from the angle of corrosion and it focused on the search for a material resistant to corrosion.
  • the mechanical resistance and the appearance of this film is variable according to the metal constituting the cathode and according to the appearance of the surface of this cathode.
  • this process for the production of fine and ultrafine zinc powders by electrolysis in basic medium is characterized in that a cathode coated with a film of varnish or silicone obtained from an aerosol.
  • the bath can be agitated, during electrolysis, by irradiating it by means of ultra sounds preferably having an emission frequency of 40 kHz.
  • the initial concentration of zinc in the bath is preferably limited to around 30 g / l.
  • the process according to the invention makes it possible to obtain, by alkaline electrolysis, fine and ultra fine powders and this directly, without requiring additional grinding.
  • the varnish or silicone used must have chemical resistance to attack by caustic solutions.
  • varnish or silicone must be as regular as possible, which supposes an appropriate solvent dosage. Indeed, a too viscous varnish, during its projection, forms granules which solidify without spreading out and thereby recreate, by attenuating it, a heterogeneity of surface. Likewise, a varnishing with a brush leads to poor results. It therefore appears essential that the solvent is sufficiently dosed to allow spreading by gravity flow of the varnish or of the silicone. This condition being fulfilled, the surface can be considered very regular.
  • cathodes thus treated must be free of dust and traces of fatty substances, or of any other element, preventing a close link between metal and varnish.
  • the process according to the invention can possibly be improved by playing on the control of other parameters, namely the zinc electrolysis concentration and the agitation of the bath.
  • the solid lines of FIG. 2 show the influence of the initial zinc concentration Ci (between 10 and 45 g / 1), indicated on the ordinate, on the d50 and the d90 of the powder obtained, in the absence of any agitation of the bath, the particle size D in microns of the powder being plotted on the ordinate.
  • the electrolysis is controlled by the diffusion of the metal ions in the NERNST layer and the nucleation rate is higher than the growth rate of the crystals, and conversely in the strongly decreasing part.
  • the methods usually used reside in the pressure injection of the electrolyte in well chosen places or in a mechanical agitation.
  • the varnishing of the el p ctrode, according to the invention obviously introduces a loss of faradyque efficiency by adding an additional ohmic resistance to the cell. This loss is in fact very low (1 to 2%) of the order of the total uncertainty on the measurements, and it is obvious that the efficiency brought to the particle size control is without common measure with this reduction in yield. Furthermore, the very regular nature of the deposit (no warts or pimples creating short circuits) that the varnishing induced, makes it possible to reduce the anode-cathode distance and to largely compensate for this resistance.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
EP85400470A 1984-03-16 1985-03-12 Verfahren zur Herstellung von feinen und ultrafeinen Zinkpulvern durch Elektrolyse in basischem Medium Expired EP0156721B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8404091 1984-03-16
FR8404091A FR2561265B1 (fr) 1984-03-16 1984-03-16 Procede de production de poudres fines et ultrafines de zinc par electrolyse en milieu basique

Publications (2)

Publication Number Publication Date
EP0156721A1 true EP0156721A1 (de) 1985-10-02
EP0156721B1 EP0156721B1 (de) 1987-09-16

Family

ID=9302114

Family Applications (1)

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EP85400470A Expired EP0156721B1 (de) 1984-03-16 1985-03-12 Verfahren zur Herstellung von feinen und ultrafeinen Zinkpulvern durch Elektrolyse in basischem Medium

Country Status (8)

Country Link
US (1) US4676877A (de)
EP (1) EP0156721B1 (de)
JP (1) JPS61501998A (de)
AU (1) AU572638B2 (de)
BR (1) BR8506051A (de)
DE (1) DE3560640D1 (de)
FR (1) FR2561265B1 (de)
WO (1) WO1985004195A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0575709A1 (de) * 1992-06-25 1993-12-29 Schott Glaswerke Verfahren zur elektrolytischen Herstellung feinkörniger, einphasiger, metallischer Legierungspulver
WO1995033871A1 (fr) * 1994-06-03 1995-12-14 Universite Libre De Bruxelles Dispositif pour la production de poudres ultrafines

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1041757C (zh) * 1991-08-02 1999-01-20 北京矿冶研究总院 一种浸出电解法从含锌物料中生产锌粉的方法
DE19840842A1 (de) * 1998-09-07 2000-03-09 Henkel Kgaa Elektrochemische Herstellung amorpher oder kristalliner Metalloxide mit Teilchengrößen im Nanometerbereich
US6569311B2 (en) 2001-02-02 2003-05-27 Clariant Finance (Bvi) Limited Continuous electrochemical process for preparation of zinc powder
CA2347308A1 (en) * 2001-02-02 2002-08-02 Clariant Finance (Bvi) Limited Electrochemical process for preparation of zinc powder
TW557596B (en) * 2002-06-03 2003-10-11 Ming Chi Inst Of Technology The method of preparing the solid-state polymer Zn-air battery
US7470351B2 (en) * 2002-09-12 2008-12-30 Teck Cominco Metals Ltd. Discrete particle electrolyzer cathode and method of making same
US7166203B2 (en) * 2002-09-12 2007-01-23 Teck Cominco Metals Ltd. Controlled concentration electrolysis system
US7273537B2 (en) * 2002-09-12 2007-09-25 Teck Cominco Metals, Ltd. Method of production of metal particles through electrolysis
US20040140222A1 (en) * 2002-09-12 2004-07-22 Smedley Stuart I. Method for operating a metal particle electrolyzer
US6811625B2 (en) * 2002-10-17 2004-11-02 General Motors Corporation Method for processing of continuously cast aluminum sheet
CN101942678B (zh) * 2010-09-19 2012-02-15 西南科技大学 一种高纯活性锌粉的制备方法
DE102011106564A1 (de) * 2011-07-05 2013-01-10 Mahle International Gmbh Verfahren zur Herstellung einer Zylinderlauffläche sowie Zylinderlaufbuchse
EP4183902A1 (de) 2016-09-23 2023-05-24 Zinc8 Energy Solutions Inc. Vorrichtung, systeme und verfahren zur hocheffizienten metallpartikelregeneration
RU2663918C1 (ru) * 2017-09-01 2018-08-13 Публичное акционерное общество "Челябинский цинковый завод" Способ получения цинкового порошка из цинксодержащих отходов
RU2743567C1 (ru) * 2020-02-03 2021-02-19 Негосударственное частное образовательное учреждение высшего образования "Технический университет УГМК" Способ получения цинкового порошка из цинксодержащих отходов

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3208920A (en) * 1962-08-09 1965-09-28 Gen Electric Process for electrolytically depositing metallic material

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
US1397008A (en) * 1918-09-16 1921-11-15 Mcgall Albert Method of preparing finely-divided metals
US1846697A (en) * 1929-09-18 1932-02-23 Copper Deoxidation Corp Method of making brittle cathodes
US2285762A (en) * 1938-02-04 1942-06-09 Phelps Dodge Corp Electrodeposition of copper powder
NL302152A (de) * 1963-01-05
US3326783A (en) * 1963-08-21 1967-06-20 Tennessee Corp Process for the production of electrolytic zinc powder
GB1057625A (en) * 1963-11-25 1967-02-01 Ici Ltd Electro deposition process
JPS5018358A (de) * 1973-06-11 1975-02-26
AU502514B2 (en) * 1975-07-21 1979-07-26 Compagnie Generale Oielectricite Sa Zinc regenerating method. and device
FR2372906A2 (fr) * 1976-12-03 1978-06-30 Comp Generale Electricite Procede et dispositif de regeneration de zinc
JPS5618358A (en) * 1979-07-20 1981-02-21 Jeol Ltd Field mover for electron microscope
JPS57192283A (en) * 1981-05-21 1982-11-26 Saito Yuri Manufactre of ultrafine metal particle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3208920A (en) * 1962-08-09 1965-09-28 Gen Electric Process for electrolytically depositing metallic material

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 84, no. 20, mai 1976, page 491, no. 142603g, Columbus, Ohio, US; & JP-A-50 018 358 (SANWA GOSEI KOGYO K.K.) 26-02-1975 *
CHEMICAL ABSTRACTS, vol. 98, no. 18, mai 1983, page 523, no. 51794m, Columbus, Ohio, US; & JP-A-57 192 283 (T. SAITO & G. MIZOTA) 26-11-1982 *
N. IBL: "Advances in Electrochemistry and Electrochemical Engineering", vol. 2, 1962, pages 53-54,65, P. Delahay & C.W. Tobias Interscience Publishers, New York, US; *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0575709A1 (de) * 1992-06-25 1993-12-29 Schott Glaswerke Verfahren zur elektrolytischen Herstellung feinkörniger, einphasiger, metallischer Legierungspulver
WO1995033871A1 (fr) * 1994-06-03 1995-12-14 Universite Libre De Bruxelles Dispositif pour la production de poudres ultrafines

Also Published As

Publication number Publication date
US4676877A (en) 1987-06-30
AU572638B2 (en) 1988-05-12
FR2561265A1 (fr) 1985-09-20
WO1985004195A1 (fr) 1985-09-26
AU4064685A (en) 1985-10-11
EP0156721B1 (de) 1987-09-16
BR8506051A (pt) 1986-03-25
FR2561265B1 (fr) 1986-09-26
JPS61501998A (ja) 1986-09-11
DE3560640D1 (en) 1987-10-22

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