AU652179B2 - Insoluble anode for electrolyses in aqueuos solutions - Google Patents
Insoluble anode for electrolyses in aqueuos solutions Download PDFInfo
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- AU652179B2 AU652179B2 AU84896/91A AU8489691A AU652179B2 AU 652179 B2 AU652179 B2 AU 652179B2 AU 84896/91 A AU84896/91 A AU 84896/91A AU 8489691 A AU8489691 A AU 8489691A AU 652179 B2 AU652179 B2 AU 652179B2
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- Australia
- Prior art keywords
- anode
- bimetallic
- framework
- bus bar
- anode according
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 16
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 13
- 239000004020 conductor Substances 0.000 claims description 10
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- YADSGOSSYOOKMP-UHFFFAOYSA-N dioxolead Chemical compound O=[Pb]=O YADSGOSSYOOKMP-UHFFFAOYSA-N 0.000 claims description 5
- 238000005868 electrolysis reaction Methods 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 229910052723 transition metal Inorganic materials 0.000 claims description 5
- 150000003624 transition metals Chemical class 0.000 claims description 5
- 230000003197 catalytic effect Effects 0.000 claims description 4
- 229910052715 tantalum Inorganic materials 0.000 claims description 4
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910001385 heavy metal Inorganic materials 0.000 claims description 3
- 239000010955 niobium Substances 0.000 claims description 3
- 239000007800 oxidant agent Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 235000009917 Crataegus X brevipes Nutrition 0.000 claims 1
- 235000013204 Crataegus X haemacarpa Nutrition 0.000 claims 1
- 235000009685 Crataegus X maligna Nutrition 0.000 claims 1
- 235000009444 Crataegus X rubrocarnea Nutrition 0.000 claims 1
- 235000009486 Crataegus bullatus Nutrition 0.000 claims 1
- 235000017181 Crataegus chrysocarpa Nutrition 0.000 claims 1
- 235000009682 Crataegus limnophila Nutrition 0.000 claims 1
- 235000004423 Crataegus monogyna Nutrition 0.000 claims 1
- 240000000171 Crataegus monogyna Species 0.000 claims 1
- 235000002313 Crataegus paludosa Nutrition 0.000 claims 1
- 235000009840 Crataegus x incaedua Nutrition 0.000 claims 1
- 241001393742 Simian endogenous retrovirus Species 0.000 claims 1
- 210000002837 heart atrium Anatomy 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 description 9
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 8
- 239000011701 zinc Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- 238000005363 electrowinning Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000010405 anode material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical class [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- JODOMBGKVAIYRQ-UHFFFAOYSA-N [Nb].[Ta].[Ti] Chemical compound [Nb].[Ta].[Ti] JODOMBGKVAIYRQ-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910052924 anglesite Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- SXDBWCPKPHAZSM-UHFFFAOYSA-M bromate Chemical class [O-]Br(=O)=O SXDBWCPKPHAZSM-UHFFFAOYSA-M 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 101150089047 cutA gene Proteins 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- ICIWUVCWSCSTAQ-UHFFFAOYSA-N iodic acid Chemical class OI(=O)=O ICIWUVCWSCSTAQ-UHFFFAOYSA-N 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- LLYCMZGLHLKPPU-UHFFFAOYSA-N perbromic acid Chemical class OBr(=O)(=O)=O LLYCMZGLHLKPPU-UHFFFAOYSA-N 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical class OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 1
- KHIWWQKSHDUIBK-UHFFFAOYSA-N periodic acid Chemical class OI(=O)(=O)=O KHIWWQKSHDUIBK-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
Classifications
-
- 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
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)
Description
C V P/0o/oil 28/91 Regulation 3.2(2)
AUSTRALIA
Patents Act 1990
ORIGINAL
COMPLETE SPECIFICATION STANDARD PATENT o 0* o p 0000 0000 V 00 40 0 O 00 0 0 4 00 9009 0000 9 00 00 0 0 00 Application Number: Lodged: Invention Title: INSOLUBLE ANODE IFOR ELECTROLYSES IN AQUEOUS SOLUTIONS a 0 06 Ie The following statement Is a full description of this Invention, including the best method of performing it known to 0~us "INSOLUBLE ANODE FOR ELECTROLYSES IN AQUEOUS SOLUTIONS" The extraction of heavy metaLs from the aqueous solutions of the salts which contain them, by electroLysis (electrowinning), requires the use of insoluble anodes which are good electrical conductors, and simultaneously are endowed with a high enough resistance to the electrolyte used and to the products from the relevant anodic reactions, and, finally, favour the development of oxygen.
For those metals which are more commonly produced 10 by this route: copper, nickel, manganese, zinc, cadmium, and so forth, the present art preferably uses j anodes of bonded Lead (with antimony, silver, calcium, and so forth).
In the usual sulfuric baths used to electrowin the above said metals, the lead anodes get coated with a Sthin Layer of lead sulfate which, by oxidation, is transformed into a layer consisting of Pb dioxide, which protects them from further corrosion and which, o.o by being conductive, uses the development of 02 with a i; o" 20 suitably Low oxygen overvoltage.
In order to electrowin copper and nickel from the solutions of their sulfates, anodes have being used for many years, which consists of Lead containing 6-8% of Sb, and which are consumed very slowly, unless chloride ions are present in the electrolyte. Unfortunately, the anode of Pb/Sb does not prevent Pb from polluting of cathode.
On the contrary, for zinc electrowinning, anodes of Pb with 0.5-1% of Ag are used, which are obtained by 2.
casting or Lamination, and sometimes are provided with grooves to favour oxygen development and other times are provided with circular holes to favour the circulation of the electrolyte. The conduction of electrical current throughout the anode is secured by inserting the copper bar inside the body of the same anode, by melting. The resistance of these anodes to the chemical attack by the electrolyte is undoubtedly good, and the useful operating Life of such electrodes 10 is often longer than 2-3 years.
A negative characteristic consists in that, owing to the presence in the zinc-containing solution, of a *94o Scertain level of manganous ions, adhering scales of MnO2 are foried on the anode, which become thicker and thicker with time.
When these scales get detached, owing to natural processes, they release particles of Pb02 and/or of ar PbS04, which increase the Pb level in the cathodic 6 09 zinc.
0 20 Another common problem displayed by the lead anodes used in the above cited electrolyses, is the Slarge amount of immobilized metal (the weight of an 4 t anode of the cells known from the prior art is always higher than 100 kg), and the costs deriving from the periodic restoration of the anodes. Furthermore, in many facilities, the burden should be taken into consideration, which derives from the periodic removal of the scales (every 2-4 weeks), which is carried out in order to improve the quality of produced zinc, and reduce the cell voltage.
3.
The production of lead by the etectrolytic route is presently in the focus of interest of the big metallurgical industry: the fluoroboric and fLuorosiLicic electroLytes, preferred owing to the higher quality of deposits which can be obtained, cai,;ses serious problems of resistance of the anodic material to arise.
E.R. Cole et at., USP-42 72 340, uses an anode constituted by a titanium sheet electroLyticaLLy coated O 10 with a thin-texture Layer of PbOz, with a particularly compact structure.
0 ,o M. Ginatta, USP-4 098 658, uses anodes made from 113 graphite bars, which get naturally coated with PbOz, 3' and are sheltered by it.
R.D. Prengaman et aL., USP-4 236 978 uses anodes made from a graphite plate wrapped in a net made from a plastics material, which serves as a reinforcement for the deposit of PbOz, and counteracts the brittLeness thereof.
oo 20 All these types of anodes display a poor o o, o electrical conductivity, are rather brittle', and their useful operating life is rather short.
Also the probLems caused by the anodic materials used to produce oxidizer halogenated salts (at present, activated Ti or Pt are used), are not completeLy solved.
In EP Public. No. 328 189 to the same Applicant's name, an electricaL conductor is disclosed, which is suitable, in particuLar, for use as an insoluble anode in electrowinning processes and i -PX I a a 0 a 00 0 00 0 0 0 0 0 0 0 09 0600 0 0 00 electrochemical processe in general, which is characterized in that it is constituted by a bimetallic wire composed by an inner copper core, coated by a thinner, external Layer of a transition metal preferably selected from tantalum, titanium and niobium.
The present invention proposes to use an electrical conductor of the above said EP Public.No. 328189 to the same Applicant's name and, as its main purpose, aims at supplying, with it, an anodic structure which is particularly able to resist to the electrolytes and to the very aggressive products from the anodic reaction, which are found in the electrowinning of the main heavy metals (copper, nickel, zinc, cadmium, lead, and so forth) from the aqueous solutions of their salts.
In particular, the anodic structure of the present invention should also be suitable for being advantageously used for the electrolytic production of 20 a large number of oxidizer halogenated salts (chlorates and perchlorates, bromates and perbromates, iodates and periodates), which require that an anodic material is used, which displays a particularly high resistance to corrosion.
In order to achieve such purposes, the present invention proposes an insoluble anode for the electrolysis of aqueous solutions, h a r d in that z- id n dc eompriz s-a framework which supports a bus bar of copper provided with vertical holes, and a plurality of electrical conductors, constituted by 0 0 0 4 0 00 0 0 0 01 0 0i 00 0 0i 0 1 ,x .4* N 6; ii .i 4.
*0 00 0 0 000 o 0; 0 0 0 00 bimetallic wires consisting of an inner copper core coated by an outer, thinner Layer of a transition metal, with each of said bimetallic wires being given a fork shape, which fork is fastened in a vertical position onto said framework, so that the free ends of each of said fork-shaped elements pass through the above said vertical holes provided in said bus bar.
The transition metals preferably are tantalum titanium niobium (Nb).
In order to better describe the features and advantages of the instant invention, an exemplifying form of practical embodiment thereof which in no way should be construed as being limitative thereof is disclosed in the following, with reference to the figures of the accompanying drawings.
Figure 1 shows a front elevation view of an anode according to the present invention.
Figure 2 shows a schematic perspective view of a detail of the anode according to the present invention.
Figure 3 shows a sectional view made along the section line III-III of figure 1.
Referring to such figures, an anode according to the present invention comprises a copper bar 1 with a rectangular cross-section, which acts as a bus bar a current bearing bar), provided with vertical holes 11 for inserting through, and horizontal screwthreaded holes for fastening onto, said bus bar, the U- shqe4 free ends of 4t- haped elements 2 made from a 4bimetallic conductor CuTa (or CuNb or CuTi), coated with a catalytic layer of Pt and/or PbO 2 Said fork- 0 QO 0'0.0 4 0 P 00 4 0 0 0 *L i t i n~ r~n~, X-1: shaped elements behave as an electrode witl preferential oxygen development, and are positioned on a same plane, so as to form a plurality of longitudinal, co-planar wires.
U -s Aped The bus bar 1 and the f4rk-hpcd elements 2 are
A
all supported by a framework 3, which comprises a pair of uprights made from an insulating plastics material, which performs the function of stiffening the overall structure, so as to make it possible the same anode to 10 be precisely positioned inside the cell.
oo In the accompanying figures, the following are moreover displayed: a structural shape made from a plastic material 4, which constitutes the upper horizontal side of the framework 3, and also performs the function of protecting the copper bar from the acidic mists which ,c can be evolved from the surface of the electrolytic 4 4 bath; a structural shape made from a plastics material 20 which constitutes the lower horizontal side of the framework, inside which the "U"-shaped ends of the U-shaced S--e-pr-k-'h-ap d- elements of bimetallic conductor enter; upper joints 6 and lower joints 7 between the vertical and horizontal sides of the framework; spacers 8 made from a plastics material, slid through, and fastened at determined levels onto, the vertical uprights of the framework, which keep each anode exactly spaced apart from the adjacent cathodes.
In figure 3, the details are shown of the pJ $I U- skaped insertion of the bent ends of the Af rk- shapd- elements of bimetaLLic conductor inside the structural shape and of the fastening, by means of a relevant compression screw, of the free ends of said fork- h:p elements inside the copper bus bar, through the holes 9. A structural shape made from a plastics material is superimposed, as a cover, to the copper bar, in order to protect it against the electrolyte drops which otherways would strike said copper bar during the 0 QQ 10 removal of the cathodes.
o o0 The advantages of the anodic structure according 0 to the present invention can be summarized as follows:
I,
Hiah eLectricalconductivty: *Copper constitutes approximately 90% of the surfacearea of the cross-section of the bimetallic wire; each anode is capable of allowing currents of many Shundreds of amperes to circulate without losses; 0 0 Light-weight: As compared to the corresponding anodes made from Pb, °oo 20 this structure has a weight which is approximateLy 1/10 of the weight thereof. As a consequence, the structure of the electrolysis ceLL is very simplified; Riduced overall dimensions of the metal comoonents of the anode: The distance between opposite-sign electrodes can be reduced to a minimal value; InalterabilitY of the anodic surfaces: Tantalum which coats, with a continuous and compact coat, the metal parts of the anode, is the best f /y'i 8.
solution offered by the present state of the art, for providing corrosion-preventing coats; Ltgssen overvoLtage:' The catalytic layer of Pt and/or Pb02, with which the tantalum anode is coated, secures the development of oxygen at the minimal possible voltage from the technical viewpoint; The structure consisting of vertical, parallel wires, well spaced apart from each other, favours the rising 0 A.
10 of the small bubbles of anodic gas, the free circulation of the electrolyte, and the continuous °o renewal of the solution at cathode/soLution oo interface. The cathodic current density can hence be a .a *o increased up to the maximum levels, as allowed by the concentration of the ions of the metal to be deposited; Owing to the same structure of the anode, the anodic o 9 0 current density results to be 3-4 times as large as the cathodic current density.
20 This situation of high anodic density is favourable when at the anode solid products are formed.
O t. In the case of Zn-containing electrolyte, manganese dioxide, which is formed on the anode of the Scell, is preferentially formed in powder form.
Therefore, the scales which adhere to lead anodes which scales must be frequently removed from said anodes are not formed.
This peculiarity can be applied to the production of electrolytic MnOz for dry batteries, in that MnO2 is obtained in continuous mode by filtering the solution .4 contained inside the caLL, without that the eLectroLysis has to be discontinued in order to remove the anodes coated with MnO2, therefore the manuaL removal of the Latter, and the expensive mitLing thereof~, being both avoided.
00 0 o 00 0 f 00 0 boo.
O 0 *000 9 00 .0 0 0 *000 0 0.4*00 0 0 '0 4 14 to
Claims (5)
1. Insoluble anode for the electrolysis of aqueous solutions, including a framework which supports a bus bar of copper provided with vertical holes, and a plurality of electrical conductors, constituted by bimetallic wires ieluding an bo4 o -f Ae free eds of inner copper core coated by an outer, thinner layer of a transition metal, with each of said bimetallic wires being fastened in a vertical position onto said framework, so that the upper ends of each of said bimetallic wires pass through the above said vertical holes provided in said bus bar.
2. Anode according to claim 1, wherein said transition metal selected from the group containing tantalum, titanium, niobium.
8. Anude according to claim I or 2, wherein said bimetallic wire is coated by a catalytic layer of pla.tinum, or of lead dioxide, or of both of them. 4. Anode according to any one of the preceding claims, wherein said bimetallic wires are located within a common plane, parallel to one another. 00 o Anode according to any one of the preceding claims, wherein said bus bar is also provided with horizontal holes for the passage of compression screws for fastening the bimetallic wires. 0 0 S" 6. Anode according to any one of the preceding claims, wherein said framework includes a pair of uprights connected with a pair of horizontal, upper S4", and lower, structural shapes. 9* 7. Anode according to claim 6, wherein said horizontal structural shapes are provided with holes through which said bimetallic wires pass. **V 1) "i. I. cl 4a1. 11 8. Anode according to any one of the preceding claims, wherein said anode includes spacers fastened in a predetermined position upon said framework, so as to keep said anode spaced apart from the adjacent cathodes inside the cell.
9. Anode according to any one of the preceding claims, wherein said bus bar is provided with a sheltering cover. Anode according to any one of the preceding claims, wherein the bimetallic wires are in the form of a plurality of U-shaped elements.
11. Anode substantially as hereinbefore described with respect to what is shown in the accompanying drawings. DATED this 18th day of August, 1993 B.U.S. ENGITEC SERV!ZI AMBIENTALI S.r.I. I r~s e t 4 I t i t 44 44 C WATERMARK PATENT TRADEMARK ATTORNEYS S THE ATRIUM 290 BURWOOD ROAD HAWTHORN VICTORIA 3122 AUSTRALIA S 4 SI SKP/MCQ:EK AU8489691 .WPC[DOC. 39] 4, 04 0 :U1 o 0o Sr 0 a 0 0~ a; o 04 ao a "INSOLUBLE ANODE FOR ELECTROLYSES IN AQUEOUS SOLUTIONS" Abstract The present invention relates to an insoLubLe anode for the e aqueous solutions electrolytic produ The anode is a bus bar with vertical and shaped elements, inserted and fast elements, made conductor, coated PbO2, acting as a development; by plastics material, lectrowinning of heavy metals from which contain them, and for the ction of oxidizer halogenated salts. constituted by a copper bar acting as as a current-bearing bar), provided horizontal holes through which fork- made from a bimetallic conductor, are ened; by a plurality of fork-shaped from said filamentary bimetallic by a catalytic layer of Pt and/or n electrode with preferential oxygen a framework made from an insulating which is used to support and stiffen the structure, and for the precise anode inside the cell. positioning of the
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU84896/91A AU652179B2 (en) | 1991-10-02 | 1991-10-02 | Insoluble anode for electrolyses in aqueuos solutions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU84896/91A AU652179B2 (en) | 1991-10-02 | 1991-10-02 | Insoluble anode for electrolyses in aqueuos solutions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU8489691A AU8489691A (en) | 1993-04-08 |
| AU652179B2 true AU652179B2 (en) | 1994-08-18 |
Family
ID=3762085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU84896/91A Ceased AU652179B2 (en) | 1991-10-02 | 1991-10-02 | Insoluble anode for electrolyses in aqueuos solutions |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU652179B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4108756A (en) * | 1973-10-30 | 1978-08-22 | Oronzio De Nora Impianti Electtrochimici S.P.A. | Bipolar electrode construction |
| US4767519A (en) * | 1985-03-07 | 1988-08-30 | Oronzio De Nora Impianti Elettrochimici | Monopolar and bipolar electrolyzer and electrodic structures thereof |
| EP0328189A2 (en) * | 1988-02-11 | 1989-08-16 | Engitec S.P.A. | Process for producing an electrical conductor, in particular suitable for use as an insoluble anode in electrowinning processes, and in electrochemical processes in general, and intermediate product thereof. |
-
1991
- 1991-10-02 AU AU84896/91A patent/AU652179B2/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4108756A (en) * | 1973-10-30 | 1978-08-22 | Oronzio De Nora Impianti Electtrochimici S.P.A. | Bipolar electrode construction |
| US4767519A (en) * | 1985-03-07 | 1988-08-30 | Oronzio De Nora Impianti Elettrochimici | Monopolar and bipolar electrolyzer and electrodic structures thereof |
| EP0328189A2 (en) * | 1988-02-11 | 1989-08-16 | Engitec S.P.A. | Process for producing an electrical conductor, in particular suitable for use as an insoluble anode in electrowinning processes, and in electrochemical processes in general, and intermediate product thereof. |
Also Published As
| Publication number | Publication date |
|---|---|
| AU8489691A (en) | 1993-04-08 |
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