EP0079058A1 - Electrode réticulée pour la récupération d'ions métalliques et méthode pour sa fabrication - Google Patents

Electrode réticulée pour la récupération d'ions métalliques et méthode pour sa fabrication Download PDF

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Publication number
EP0079058A1
EP0079058A1 EP82110180A EP82110180A EP0079058A1 EP 0079058 A1 EP0079058 A1 EP 0079058A1 EP 82110180 A EP82110180 A EP 82110180A EP 82110180 A EP82110180 A EP 82110180A EP 0079058 A1 EP0079058 A1 EP 0079058A1
Authority
EP
European Patent Office
Prior art keywords
cathode
supporting structure
assembly
electrically conductive
electrical current
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
EP82110180A
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German (de)
English (en)
Other versions
EP0079058B1 (fr
Inventor
Gary F. Platek
Geoffrey P. Krug
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.)
Eltech Systems Corp
Original Assignee
Eltech Systems Corp
Diamond Shamrock Corp
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 Eltech Systems Corp, Diamond Shamrock Corp filed Critical Eltech Systems Corp
Priority to AT82110180T priority Critical patent/ATE25114T1/de
Publication of EP0079058A1 publication Critical patent/EP0079058A1/fr
Application granted granted Critical
Publication of EP0079058B1 publication Critical patent/EP0079058B1/fr
Expired legal-status Critical Current

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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
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/02—Electrodes; Connections thereof

Definitions

  • This invention relates to electrolytic cells, and particularly to metal electrowinning. Specifically this invention relates to methods and apparatus for the electrolytic recovery of metals onto reticulate type electrodes from solutions containing ions of the metals.
  • the metal recovery cathode was comprised of a substrate made from an electrically conductive plentiful metal upon which the metal ions in solution were plated. Separation normally entailed melting the electrodeposited metal and the substrate, and subsequently separating the two metals. In some cases it was possible to separate electrodeposit form the substrate by physically cracking the electrodeposited metal from the substrate. Where the substrate metal and the electro- depositing metal were the same, often these problems associated with subsequent separation of cathode substrate and recovered metals was eased. The surface area of these traditional cathodes were often limited in their capability for holding recovered metal.
  • One past proposal for producing an openly porous reticulate form electrode that is both electrically conductive and relatively rigid has been deposition of a metal onto an openly porous polymeric foam or weave or non-woven fabric.
  • a preliminary metal deposition is made onto the polymer by treatment in a chemical bath, and subsequent electroless deposition of a metal such as copper to the polymer.
  • the electroless metal coated polymer now somewhat conductive, is then subjected to electrodeposition of additional quantities of the metal to produce a relatively rigid, substantially conductive electrode structure for use in recovering metal ions from solution.
  • a polymer structure is coated with a metal to make the polymer structure conductive
  • a metal to make the polymer structure conductive
  • this attachment point as well as the conductive metal can be subject to corrosive attack. Electrical communication to the cathode can be weakened by such corrosive action resulting in decreased efficiency of electrolytic metal recovery from solution or an interruption in recovery.
  • the present invention therefore provides a cathode assembly for use in electrolytic recovery of metal ions from solutions containing the ions.
  • the cathode includes an open supporting structure that is electrically conductive and readily fluid permeable. A portion of this structure is intended for immersion in the solution from which metal ions are being recovered and is attached to a connecting portion by which electrical current is transferred between the supporting structure and a source of electrical current.
  • An openly porous, electrically conductive, carbon impregnated polymeric membrane cathode attachably covers at least a portion of at least one surface of the reticulate structure where immersed.
  • the polymeric cathode is in electrical contact with the supporting structure.
  • the polymeric cathode is attached to the supporting using a conductive adhesive or using fasteners such as staples.
  • cathode assemblies are utilized to form anode-cathode pairs contained in an electrolytic metal recovery cell.
  • a plurality of the cathode assemblies are arranged along the length of an electrolytic cell each spanning the width of the electrolytic cell; metal ion containing solution being introduced at one end of the cell, and traversing a cell length by passing successively through the openly porous polymeric cathodes arranged within the cell.
  • the openly porous polymeric cathode of the instant invention provides a relatively low cost cathode assembly having a substantial available surface for electrodeposition of metal ions from the solution.
  • the supporting structure provides a relatively rigid cathode assembly assisting in the maintenance of anode-cathode spacing within the cell, and thereby assisting in maintaining desirably low electrical power consumption in operation of the electrolytic cell.
  • the cathode assemblies of the instant invention are relatively readily assembled by covering at least one face of the reticulate structure with the polymer. Once assembled, their unitized construction allows ready changeout as the openly porous structure becomes plugged with accumulating metal deposits. In one preferred embodiment, a portion of the reticulate structure extending above the normal level of solution within the electrolytic cell remains uncovered by the polymeric material. When pluggage of the polymeric cathode occurs, metal laden solution flowing through the cell overflows the plugged polymeric cathode through the uncovered supporting structure above the normal or usual metal laden solution level within the cell providing a visual indication of cathode pluggage.
  • FIGS. 1 and 2 show perspective and edge views respectively of a cathode assembly 10.
  • the cathode assembly 10 includes an openly fluid permeable supporting structure 12 and a polymeric cathode 14 attached to the structure 12 and in substantial electrically conducting contact with the structure 12.
  • the supporting structure 12 can be of any electrically conductive, relatively rigid material. Electrically conductive metal mesh, a perforated plate, an interwoven wire grid, a grid formed from an electrically conductive plastic such as Caprez polypropylene available from Alloy Polymers or conductive polyvinyl chloride available from Diamond Shamrock may be utilized. Other suitable or conventional materials may be utilized that readily pass electrical current through their structure while permitting ready fluid passage.
  • the supporting structure 12' performs a dual function. Electrical currrent is distributed via the structure to the polymeric cathode 14, and the structure functions to position and support the cathode 14 within an electrolytic cell and to maintain the cathode 14 in a desirable spaced relationship with anodes utilized in the electrolytic cell.
  • the cathode 14 is formed from a conductive polymer. Three polymer forms have been found attractive, foams, fiber weaves and non-woven mats. The polymer utilized should be resistant to corrosive and solvating attack threats posed by whatever metal ion laden solution is to be electrolytically relieved of its metal ion content using the cathode assembly of the instant invention.
  • One preferred form of the conductive polymer is as a foam.
  • Polyurethanes and polyesters have been found to provide effective cathodes although other conductive foams may be satisfactory.
  • the foam should be openly porous, that is, relatively freely passing fluid through its thickness.
  • the openly--porous foam should accommodate over the surface of the cathode assembly a liquid flow through the foam at least equal to the volume rate of solution from which metal ion recovery is desired.
  • Another preferred form of the invention is an openly porous woven mat of fibers of a polymer or non-woven mat of the polymer, the mat passing a liquid flow through the mat over the surface of the cathode assembly at least equal to the volume rate of solution from which metal ion recovery is desired.
  • Particularly polyester fiber weaves have been found desirable, though other electrically conductive polymeric fibers may be utilized.
  • the fiber mat or foam polymeric cathode 14 is made conductive by incorporation of carbon into the polymeric cathode 14. Carbon can be included by incorporation into fabric of the foam or mat during formation or by impregnating the foam or mat subsequent to formation. Techniques for carbon inclusion or impregnation are well known. The following materials have been found suitable for use as a polymeric cathode: #202 Urethane foam available from Richards Parents & Murray Inc.,CC-F-1/8-35PPI-100, CC-F-1/8-35PPI-65, and CC-F-7/32-30PPI-65 foams available from Lewcott Chemicals and Plastics.
  • Conductivity of the polymeric foam or mat cathode should generally be greater than about 10,000 ohms per centimeter, and preferably greater than 5,000 ohms per centimeter with preferably materials averaging 3,000 ohms per centimeter or greater.
  • the cathode 14 can vary in thickness over a considerable range. Typically a foam of 0.05 to 1.0 inches is utilized and preferably between 1/16 to 1/2". Thicker foam cathodes 14 tend to spread anode and cathode within a cell to an extent that considerable voltage inefficiency in operating a metal ion recovery cell can be introduced. Thinner cathodes 14 quickly become loaded with recovered metal, requiring undesirably frequent removal and replacement.
  • Porosity of the foam or mat can vary between about 10 and 100 pores per square inch (PPI). Preferred are materials of about 25 to 40 PPI.
  • the polymeric cathode 14 is affixed to the supporting structure 12 in any suitable or conventional manner producing electrical communication between them.
  • Conductive adhesives such as Crest 2014A and B or Crest 173 A and B, two part epoxys, available from Crest Products Corp. or 52-04-4130 conductive latex available from Chomerics Corp., staples 16 or U bolts are used to hold the structure 12 and polymeric cathode 14 in intimate electrical contact. It is important that electrical current be transferred between the reticulate structure 12 and the cathode over a substantial portion of surface portions of the cathode opposing the structure.
  • one or more flange portions 18 of the supporting structure is oriented upwardly from the cathode assembly and can be used both for mounting of the cathode assembly 10 in an electrolytic cell and for conducting electrical current to the cathode assembly.
  • the flange portions 18 can be fabricated in any suitable or conventional manner such as by forming the flange from the supporting structure and bending the portion into position, or by attachment of separately formed flange portions 18.
  • an electrolyte cell 24 is depicted including a plurality of cathode assemblies 10 and a plurality of anodes 26 arranged in spaced relationship spanning the width of the cell 24.
  • the cathode assemblies 10 generally separate the cell 24 into compartment 28.
  • the cell includes a fluid inlet 30 and outlet 32.
  • Solution containing metal ions to be recovered enters the cell via the fluid inlet and exits via the outlet.
  • the solution passes through each cathode assembly in traversing the cell, and metal ions are thereby brought into intimate contact with the cathode assembly for recovery.
  • the polymeric cathode 14 does not cover the supporting structure to full height, allowing a rising solution level to overflow the cathode 14 through a zone 40 of the supporting structure. Detection of cathode assemblies requiring changeout is thereby facilitated.
  • Anodes, and surfaces of cathodes 14 within the electrolytic cell are desirably separated by between 1/4" and 1/2". Closer spacing is feasible but formation of dendrites upon cathodes 12 closely spaced to anodes can lead to short circuiting. Greater spacing is workable, but can cause unacceptable power inefficiencies. Generally anode cathode spacings in excess of about 5 inches or less than about 1/16" are not desirable.
  • the polymeric cathode 14 may be applied to one or both surfaces of the conductive supporting structure 12, shown at 14 in Figure 2. Selection of one or both surfaces of the structure for coating is in part dependent upon factors such as concentration of metal ions in the solution being treated, flow rate of the solution through the cell, thickness of the cathode 14 being applied, and placement of anodes. Each application is therefore somewhat individualized and should be approached individually.
  • the foam squares were, installed in the Lucite cell, the encasing channels adjacent to the walls and bottom of the cell.
  • Three expanded metal mesh anodes measuring approximately 5 inches by 5 inches and coated with Diamond Shamrock TIR-2000, a mixture of tantalum, titanium, and iridium oxides were arranged alternately with the foam squares in the cell.
  • a spacing of approximately 1/2" was established between the surface of each foam square and an opposing electrode.
  • a current feeder was connected to the aluminum foil strip attached to each foam square whereby the square was made cathodic by connection to a current source.
  • a cathode was fabricated by attaching two 6 inch by 6 inch by 1/4 inch RPM #202 conductive foam squares to both faces of a 6 inch by 6 inch by 8 inch aluminum structural mesh having substantial open area. Attachment was made using staples. A 2 inch wide strip of the aluminum remained exposed.
  • the cathode was installed in the cell between and spaced from by 1/2 inch, 2 mesh anodes of the type utilized in Example I.
  • the cathode and exposed aluminum portion of the anodes were connected to an electrical current source.
  • a reservoir of 15 liters of a 210 parts per million CuSO 4 solution at a pH of about 1.75 was circulated through the cell at a flow rate of 6 gallons per minute per square foot of foam cathode.
  • a cathode assembly was fabricated by placing an 18 inch by 15 inch wide sheet of expanded aluminum foil mesh between two 18 inch x 15 inch x 1/8 inch thick cathodes formed of carbon impregnated Lewcott polyurethane foam. The three-component cathode assembly was secured by bonding the foam to the aluminum with a conductive epoxy resin adhesive. The cathode was placed in an open electrolytic cell between two Diamond Shamrock TIR-2000 metallic anodes with a spacing between anodes and the foam surfaces of approximately 1/2 inch.
  • a wastewater stream containing approximately 150 parts per million CuSo 4 was passed through the electrolytic cell with no recycle for approximately 200 hours at a flow rate of 2 gallons per minute per square foot of exposed cathode area.
  • a direct current of 3 amps per square foot of exposed cathode area was applied to the cell at a constant voltage of 2.8 volts.
  • 300 grams of metallic copper had been removed from the CuSO. 4 solution.

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  • 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)
  • Manufacture And Refinement Of Metals (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Laminated Bodies (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Fuel Cell (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Battery Electrode And Active Subsutance (AREA)
EP82110180A 1981-11-09 1982-11-04 Electrode réticulée pour la récupération d'ions métalliques et méthode pour sa fabrication Expired EP0079058B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82110180T ATE25114T1 (de) 1981-11-09 1982-11-04 Netzartige elektrode fuer die abscheidung von metallionen und verfahren zu deren herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31948081A 1981-11-09 1981-11-09
US319480 1981-11-09

Publications (2)

Publication Number Publication Date
EP0079058A1 true EP0079058A1 (fr) 1983-05-18
EP0079058B1 EP0079058B1 (fr) 1987-01-21

Family

ID=23242411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82110180A Expired EP0079058B1 (fr) 1981-11-09 1982-11-04 Electrode réticulée pour la récupération d'ions métalliques et méthode pour sa fabrication

Country Status (17)

Country Link
EP (1) EP0079058B1 (fr)
JP (1) JPS5887288A (fr)
KR (1) KR840002470A (fr)
AT (1) ATE25114T1 (fr)
AU (1) AU9024082A (fr)
BR (1) BR8206356A (fr)
CA (1) CA1234366A (fr)
DD (1) DD206567A5 (fr)
DE (1) DE3275209D1 (fr)
DK (1) DK496282A (fr)
ES (1) ES523880A0 (fr)
FI (1) FI823819L (fr)
GR (1) GR76777B (fr)
IL (1) IL67181A0 (fr)
NO (1) NO823703L (fr)
PL (1) PL238929A1 (fr)
PT (1) PT75782B (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2556359A1 (fr) * 1983-12-12 1985-06-14 Sayer Bruno Revetement pelable et conducteur en electrometallurgie et procede pour son obtention
FR2557891A1 (fr) * 1984-01-09 1985-07-12 Heroguelle Yves Perfectionnements aux dispositifs de recuperation galvanique de metaux en solutions diluees
EP0151055A2 (fr) * 1984-01-09 1985-08-07 Yves Heroguelle Perfectionnements aux dispositifs de récupération galvanique de métaux en solutions diluées
FR2574817A2 (fr) * 1984-12-13 1986-06-20 Heroguelle Yves Perfectionnements aux dispositifs de recuperation galvanique de metaux en solutions
EP0266312A1 (fr) * 1986-10-27 1988-05-04 Eltech Systems Corporation Electrode reticulée et cellule pour la récuperation de métaux des eaux residuelles
EP0338857A2 (fr) * 1988-04-21 1989-10-25 Mitsuboshi Belting Ltd. Electrode
DE4007127C1 (en) * 1990-03-07 1991-07-25 Deutsche Automobilgesellschaft Mbh, 3000 Hannover, De Electrode for electrolytic treatment of waste water - consists of nonwoven or needle felted non-conducting plastic fibres providing porous structure
WO1995007375A1 (fr) * 1993-09-10 1995-03-16 Ea Technology Ltd. Cellule de recuperation de metaux dans des solutions diluees
FR2727133A1 (fr) * 1994-11-21 1996-05-24 Rhone Poulenc Chimie Procede de recuperation de metaux par voie electrochimique
GB2343192A (en) * 1998-10-27 2000-05-03 Eastman Kodak Co Electrochemical cell for metal recovery
GB2343193A (en) * 1998-10-27 2000-05-03 Eastman Kodak Co Metal recovery using electrochemical cell

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100992716B1 (ko) * 2009-10-13 2010-11-05 석상엽 접촉 비표면적을 증대시킨 유가금속 회수용 전해조
JP6622466B2 (ja) * 2015-02-17 2019-12-18 学校法人近畿大学 多孔質アルミニウム電極を用いる金属イオン含有水溶液中の金属イオンの電気化学的吸蔵除去方法及び装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE878107C (de) * 1951-03-29 1953-06-01 Licentia Gmbh Verfahren zur elektrolytischen Reinigung von Metallen
FR1509002A (fr) * 1966-11-07 1968-01-12 Lorraine Carbone Perfectionnements aux électrodes de piles à combustible
DE2225774A1 (de) * 1971-05-28 1972-11-30 Rhone Poulenc Sa Als elektrisch leitende Elemente verwendbare Materialien
DE2255985A1 (de) * 1972-06-26 1974-01-10 R C E Ricerche Conversione En Kathode fuer brennstoffzellen, auch des typs metall-luft, sowie herstellungsverfahren
DE2363042A1 (de) * 1972-12-22 1974-06-27 Ryozo Iijima Mutterrohling zur herstellung von mutterblechen fuer die verwendung bei der elektrolytkupfererzeugung
US4158612A (en) * 1977-12-27 1979-06-19 The International Nickel Company, Inc. Polymeric mandrel for electroforming and method of electroforming
US4235696A (en) * 1979-07-23 1980-11-25 The International Nickel Co., Inc. Mandrel for nickel rounds with a monolithic surface

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE878107C (de) * 1951-03-29 1953-06-01 Licentia Gmbh Verfahren zur elektrolytischen Reinigung von Metallen
FR1509002A (fr) * 1966-11-07 1968-01-12 Lorraine Carbone Perfectionnements aux électrodes de piles à combustible
DE2225774A1 (de) * 1971-05-28 1972-11-30 Rhone Poulenc Sa Als elektrisch leitende Elemente verwendbare Materialien
DE2255985A1 (de) * 1972-06-26 1974-01-10 R C E Ricerche Conversione En Kathode fuer brennstoffzellen, auch des typs metall-luft, sowie herstellungsverfahren
DE2363042A1 (de) * 1972-12-22 1974-06-27 Ryozo Iijima Mutterrohling zur herstellung von mutterblechen fuer die verwendung bei der elektrolytkupfererzeugung
US4158612A (en) * 1977-12-27 1979-06-19 The International Nickel Company, Inc. Polymeric mandrel for electroforming and method of electroforming
US4235696A (en) * 1979-07-23 1980-11-25 The International Nickel Co., Inc. Mandrel for nickel rounds with a monolithic surface

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 88, no. 16, 17th April 1978, page 475, no. 112528b, Columbus Ohio (USA); & JP - A - 77 127 405 (NIPPON KOBUNSHI KAGAKU K.K.) (26-10-1977) *
CHEMICAL ABSTRACTS, vol. 88, no. 18, 1st May 1978, page 469, no. 128273a, Columbus Ohio (USA); & JP - A - 77 136 803 (STANLEY ELECTRIC CO., LTD.) (15-11-1977) *
CHEMICAL ABSTRACTS, vol. 90, no. 2, January 1979, page 502, no. 14051n, Columbus Ohio (USA); & JP - A - 78 29 126 ((IIJIMA, RYOZO) (18-08-1978) *

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2556359A1 (fr) * 1983-12-12 1985-06-14 Sayer Bruno Revetement pelable et conducteur en electrometallurgie et procede pour son obtention
FR2557891A1 (fr) * 1984-01-09 1985-07-12 Heroguelle Yves Perfectionnements aux dispositifs de recuperation galvanique de metaux en solutions diluees
EP0151055A2 (fr) * 1984-01-09 1985-08-07 Yves Heroguelle Perfectionnements aux dispositifs de récupération galvanique de métaux en solutions diluées
EP0151055A3 (en) * 1984-01-09 1985-08-21 Yves Heroguelle Apparatus for the galvanic recovery of metals from diluted solutions
FR2574817A2 (fr) * 1984-12-13 1986-06-20 Heroguelle Yves Perfectionnements aux dispositifs de recuperation galvanique de metaux en solutions
EP0266312A1 (fr) * 1986-10-27 1988-05-04 Eltech Systems Corporation Electrode reticulée et cellule pour la récuperation de métaux des eaux residuelles
WO1988003182A1 (fr) * 1986-10-27 1988-05-05 Eltech Systems Corporation Electrode reticulee et element d'extraction de metaux a partir d'eaux usees
EP0338857A2 (fr) * 1988-04-21 1989-10-25 Mitsuboshi Belting Ltd. Electrode
EP0338857A3 (fr) * 1988-04-21 1990-04-11 Mitsuboshi Belting Ltd. Electrode
DE4007127C1 (en) * 1990-03-07 1991-07-25 Deutsche Automobilgesellschaft Mbh, 3000 Hannover, De Electrode for electrolytic treatment of waste water - consists of nonwoven or needle felted non-conducting plastic fibres providing porous structure
WO1995007375A1 (fr) * 1993-09-10 1995-03-16 Ea Technology Ltd. Cellule de recuperation de metaux dans des solutions diluees
GB2296720A (en) * 1993-09-10 1996-07-10 Ea Tech Ltd Cell for the recovery of metals from dilute solutions
FR2727133A1 (fr) * 1994-11-21 1996-05-24 Rhone Poulenc Chimie Procede de recuperation de metaux par voie electrochimique
WO1996015988A1 (fr) * 1994-11-21 1996-05-30 Rhone-Poulenc Chimie Procede de recuperation de metaux par voie electrochimique
GB2343192A (en) * 1998-10-27 2000-05-03 Eastman Kodak Co Electrochemical cell for metal recovery
GB2343193A (en) * 1998-10-27 2000-05-03 Eastman Kodak Co Metal recovery using electrochemical cell
US6086733A (en) * 1998-10-27 2000-07-11 Eastman Kodak Company Electrochemical cell for metal recovery
US6149797A (en) * 1998-10-27 2000-11-21 Eastman Kodak Company Method of metal recovery using electrochemical cell
GB2343192B (en) * 1998-10-27 2003-06-04 Eastman Kodak Co Electrochemical cell for metal recovery
GB2343193B (en) * 1998-10-27 2003-06-04 Eastman Kodak Co Method of metal recovery using electrochemical cell

Also Published As

Publication number Publication date
DK496282A (da) 1983-05-10
DE3275209D1 (en) 1987-02-26
PT75782B (en) 1986-01-15
EP0079058B1 (fr) 1987-01-21
AU9024082A (en) 1983-05-19
NO823703L (no) 1983-05-10
ES8405449A1 (es) 1984-06-01
GR76777B (fr) 1984-09-04
BR8206356A (pt) 1983-09-27
FI823819A0 (fi) 1982-11-08
KR840002470A (ko) 1984-07-02
IL67181A0 (en) 1983-03-31
ATE25114T1 (de) 1987-02-15
JPS5887288A (ja) 1983-05-25
ES523880A0 (es) 1984-06-01
CA1234366A (fr) 1988-03-22
FI823819L (fi) 1983-05-10
PT75782A (en) 1982-12-01
DD206567A5 (de) 1984-02-01
PL238929A1 (en) 1983-05-23

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