CN1073634C - Membrane powersupplyless electrolysis process - Google Patents
Membrane powersupplyless electrolysis process Download PDFInfo
- Publication number
- CN1073634C CN1073634C CN94100937A CN94100937A CN1073634C CN 1073634 C CN1073634 C CN 1073634C CN 94100937 A CN94100937 A CN 94100937A CN 94100937 A CN94100937 A CN 94100937A CN 1073634 C CN1073634 C CN 1073634C
- Authority
- CN
- China
- Prior art keywords
- corrosion
- utmost point
- barrier film
- extracted
- copper
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title claims abstract description 15
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 10
- 239000012528 membrane Substances 0.000 title abstract description 8
- 238000005260 corrosion Methods 0.000 claims abstract description 28
- 230000007797 corrosion Effects 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 229910052802 copper Inorganic materials 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 19
- 239000004744 fabric Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 21
- 230000004888 barrier function Effects 0.000 claims description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 230000008021 deposition Effects 0.000 claims description 16
- 239000000243 solution Substances 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 3
- 239000011790 ferrous sulphate Substances 0.000 claims description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 3
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 3
- 229920002292 Nylon 6 Polymers 0.000 claims description 2
- 150000001408 amides Chemical class 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000000835 fiber Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 150000002739 metals Chemical class 0.000 abstract description 3
- 239000004952 Polyamide Substances 0.000 abstract description 2
- 238000005342 ion exchange Methods 0.000 abstract description 2
- 229920002647 polyamide Polymers 0.000 abstract description 2
- 229910052709 silver Inorganic materials 0.000 abstract description 2
- 229910052797 bismuth Inorganic materials 0.000 abstract 1
- 238000000151 deposition Methods 0.000 description 17
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 10
- 239000011701 zinc Substances 0.000 description 9
- 229910052725 zinc Inorganic materials 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
- 229910052793 cadmium Inorganic materials 0.000 description 3
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009854 hydrometallurgy Methods 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004070 electrodeposition Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 2
- 229960001763 zinc sulfate Drugs 0.000 description 2
- 229910000368 zinc sulfate Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003011 anion exchange membrane Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005363 electrowinning Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005649 metathesis reaction Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000013354 porous framework Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000009938 salting Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229960001866 silicon dioxide Drugs 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Electrolytic Production Of Metals (AREA)
Abstract
本发明是一种隔膜无电源电解法，用聚酰胺纤维制成的高密度布作为原电池中的隔膜，过程在电解槽中进行。在待提取金属液及腐蚀液之间用这个隔膜隔开，并设计了双腐蚀极结构，接通腐蚀极及沉积极，电解自动进行。用该材料作为原电池中的隔膜，离子交换量大，电流密度高，耐腐蚀，价格低，能实现工业化生产。腐蚀液不循环不净化，产品质量高而成本低。可用于提取溶液中的金属如：Cu、Ag、Bi等，具有很好的推广应用前景。
The invention is a membrane electrolysis method without power supply. The high-density cloth made of polyamide fiber is used as the membrane in the original battery, and the process is carried out in the electrolytic cell. This diaphragm is used to separate the metal liquid to be extracted and the corrosion liquid, and a double corrosion pole structure is designed, the corrosion pole and the sink pole are connected, and the electrolysis is carried out automatically. Using the material as a separator in a primary battery has large ion exchange capacity, high current density, corrosion resistance and low price, and can realize industrialized production. The corrosive liquid is not circulated and not purified, the product quality is high and the cost is low. It can be used to extract metals in solution such as: Cu, Ag, Bi, etc., and has a good prospect for popularization and application.
Description
The invention belongs to wet method and extract field of metallurgy, specifically a kind of barrier film non-transformer electrolytic process.
Be extensive use of in the known hydrometallurgical technology that power supply electrodeposition method, its principle are arranged is to utilize in the direct current decomposing solution metallic salt to obtain metal.As electro deposited copper from copper-bath, electrowinning zinc etc. from solution of zinc sulfate.The disadvantage one of these class methods is to consume a large amount of electric energy, the 2nd, and solution needs deep purifying.In order to address the above problem, once proposed multiple solution, the non-transformer electrolysis is exactly one of them, and this method has been used the most ancient galvanic principles, utilize the electrodeposition potential difference of two kinds of metals, use the active metal,, constitute galvanic cell as copper, gold and silver, mercury etc. as the metal with the activity difference such as iron, aluminium, zinc, the corrosion utmost point, corrosive fluid and the deposition utmost point, be extracted between the liquid and separate with a barrier film, make the activity difference metal since metathesis be deposited on deposition and extremely go up, thereby obtain extracting.Known Daniell cell is exactly an exemplary, and zincode in this battery (the corrosion utmost point) is corroded, and is extracted copper in the liquid and is deposited on deposition and extremely goes up.Obviously utilize this battery can from copper-containing solution, extract copper in principle, but nobody use the Daniell cell principle to carry copper from ancient times to the present.Tracing it to its cause one is that the zinc price is expensive, the 2nd, and current density does not reach industrial needs.Certainly above-mentioned zinc available iron is replaced, but the result who replaces is that extraction rate is very low, also can't be applied industrial, to such an extent as to the iron powder replacement method that still proposes the use ancients so far in the hydrometallurgy of copper, in the hydrometallurgy of zinc, use zinc replacement copper removal, cadmium or the like.Though these methods are simple, because the direct effect of metal powder, selectivity is relatively poor, and the gained metal-powder is impure.The copper sponge that obtains as the iron powder replacement method only is 70-90%, and the Spongy Cadmium that obtains in the zinc dust precipitation technology, copper ashes contain cadmium 40%, cupric about 30%, and be Powdered.Have the people once to use anion-exchange membrane, reverse osmosis membrane as the barrier film in the electrolytic process at these problems, though current density can reach preliminary service requirements, this class film mechanical property is relatively poor, can only do slabbing.Make the cell construction complexity, this class film manufacturing process is complicated in addition, the cost height, acid-proof alkaline is poor, for example mentions anti-seepage membrane and just belong to this class film with the biochemical reaction hard board of titanium dioxide and silicon-dioxide in the patent application prospectus of number of patent application 91109442.3.This class film only obtains some application at aspects such as sea water desaltination, sewage disposals at present, and concentrating of a large amount of salts also depends on evaporation concentration in metallurgical, the chemical industry, ion-exchange membrane, the reverse osmosis membrane of seeking some superior performances are the targets that metallurgical boundary endeavours to study always, because the progress of membrane technique will promote the technical progress of hydrometallurgy.
It is low to the objective of the invention is to seek a kind of resistance, and loading capacity is big, can reach enough current densities, and corrosion-resistant, the diaphragm material that price is low makes non-transformer electrolytic process technical applicationization.
Technical scheme of the present invention is:
Barrier film non-transformer electrolytic process, form by liquid to be extracted, the deposition utmost point, corrosive fluid, the corrosion utmost point and the barrier film that is added between them, process is carried out in electrolyzer, connect the deposition utmost point and the corrosion utmost point, electrolysis is carried out automatically, said barrier film is the high-density cloth that tynex is made, and the two corrosion of corrosion utmost point employing electrode structures promptly deposit each surface of the utmost point and two corrosion pole-faces formation galvanic cells.Polymeric amide high-density cloth is done complete, be enclosed within on the framework that corrosion resistant material makes, make diaphram tank.Extract electrolytic copper when being used for copper-containing solution, barrier film is the polyamide 66 cloth, or polyamide 6, liquid composition to be extracted is Cu＞1g/l, and other metal is not limit, and deposits very copper coin, stainless steel plate or titanium plate, corrosive fluid is the acidic aqueous solution of ferrous sulfate, and very iron plate is corroded in PH＜5.
Below in conjunction with accompanying drawing and embodiment shown in the drawings content of the present invention is described further, but the content of invention is not limited to shown in the accompanying drawing.
Fig. 1 is the electrolyzer front view.
Fig. 2 is the vertical view of electrolyzer.
1 is electrolyzer, and 2 are the deposition utmost point, and 3 is barrier film, and 4 is etched plate, and 5 is the barrier film framework, and 6 is corrosive fluid, and 7 is liquid to be extracted, and 8 is lead.
The high density cloth made from Fypro is as the barrier film in the galvanic cell. Process is in electrolysis Carry out in the groove, the solution and the corrosive liquid that add metal to be extracted in electrolytic cell (can be and make corruption The salting liquid of the metal of the erosion utmost point), separate with barrier film between two kinds of solution, at molten metal to be extracted In insert the deposition utmost point (the plate system of available graphite cake, corrosion resistant plate, titanium plate and metal to be extracted Become, in corrosive liquid, insert the corrosion utmost point (the real plate in the active metals such as available iron, zinc, aluminium is made). To corrode the utmost point and deposit the utmost point and connect with lead, electrolysis is carried out automatically. Metal ion to be extracted is continuous The deposition extremely the deposition, when depositing to certain thickness with it from extremely taking off, obtain gold to be extracted Belong to plate. In order to make current density as far as possible big, the present invention proposes two corrosion electrode structures, namely every The one deposition utmost point and two corrosion pole-faces consist of a galvanic cell.
The mechanism of action of density film in electrolytic process made from Fypro is: wait to carry The acid meeting of getting in the liquid is diffused in the corrosive liquid automatically on a small quantity, makes corrosive liquid keep necessary acidity, Prevent from corroding utmost point passivation, and the metal ion that produces of corrosion can penetrate film and enters liquid to be extracted, Because process is in a kind of DIFFUSION CONTROLLED, metal ion to be extracted is extremely located in deposition during electrolysis In poised state, overpotential is littler, and Trace elements is separated out less, and tank voltage is with metal to be extracted Concentration reduce, reduced greatly impurity element because concentration difference polarizes separates out. Significantly Improved the quality of product, and corrosive liquid need not circulation and purify, simplified technology, reduce Cost.
Construction and the installation of polyamide density film in electrolytic cell is among the present invention: with this barrier film Make diaphragm case, be enclosed within on the barrier film framework that anti-corrosion material makes and make diaphram tank, will corrode the utmost point Insert diaphram tank, in this diaphram tank, inject corrosive liquid again, at last diaphram tank is put into to be extracted In the liquid. Insert the deposition utmost point in liquid to be extracted, connect the corrosion utmost point and the deposition utmost point, electrolysis is advanced automatically OK.
The fibre diaphragm that uses the present invention to propose reaches with existing amberplex, reverse osmosis membrane Other film is compared, and have following advantage: 1) ion exchange capacity is big, current density height, corrosion resistant Erosion, price is low, can realize suitability for industrialized production; 2) corrosive liquid need not circulation and purifies, and simplifies Technology, reduced cost; 3) design two corrosion utmost points, improved current density and product matter Amount.
Embodiment 1,
Electrolyzer as shown in drawings, barrier film is a polyamide 66 fiber high-density cloth, it is done complete, is enclosed within on the porous framework that plastics make, and makes diaphram tank.Liquid composition to be extracted is Cu30g/l, Fe25g/l, Al20g/l, other metal trace, PH=0.5.Corrosive fluid is the acidic aqueous solution PH=2.5 of ferrous sulfate.Deposit very copper coin (stainless steel plate, titanium plate also can), corrode very iron plate.Current density is 20-68A/m2.Copper coin (product) cupric 99.93% that obtains on depositing extremely, the iron loss amount is 1.3g/gCu.
Claims (3)
1, a kind of barrier film non-transformer electrolytic process, form by liquid to be extracted, the deposition utmost point, corrosive fluid, the corrosion utmost point and the barrier film that is added between them, process is carried out in electrolyzer, connect the deposition utmost point and the corrosion utmost point, electrolysis is carried out automatically, it is characterized in that said barrier film is the high-density cloth that tynex is made, the two corrosion of corrosion utmost point employing electrode structures promptly deposit each surface of the utmost point and two corrosion pole-faces formation galvanic cells.
2, by the described electrolytic process of claim 1, it is characterized in that polymeric amide high-density cloth is done complete, be enclosed within on the framework that corrosion resistant material makes, make diaphram tank.
3, by claim 1,2 described electrolytic process, be used for copper-containing solution and extract electrolytic copper, it is characterized in that barrier film is the polyamide 66 cloth, or polyamide 6, liquid composition to be extracted is Cu＞1g/l, other metal is not limit, deposit very copper coin, stainless copper coin or titanium plate, corrosive fluid is the acidic aqueous solution of ferrous sulfate, and very iron plate is corroded in PH＜5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94100937A CN1073634C (en) | 1994-02-01 | 1994-02-01 | Membrane powersupplyless electrolysis process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94100937A CN1073634C (en) | 1994-02-01 | 1994-02-01 | Membrane powersupplyless electrolysis process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1106473A CN1106473A (en) | 1995-08-09 |
| CN1073634C true CN1073634C (en) | 2001-10-24 |
Family
ID=5029939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94100937A Expired - Fee Related CN1073634C (en) | 1994-02-01 | 1994-02-01 | Membrane powersupplyless electrolysis process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1073634C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917112B (en) * | 2017-04-21 | 2019-04-19 | 中南大学 | A kind of zinc-ammonia-ammonium salt solution system replaces the method for depositing sponge copper powder |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072728A (en) * | 1991-11-23 | 1993-06-02 | 大冶有色金属公司铜录山铜铁矿 | Electrode potential electrolytic method |
| CN1157856A (en) * | 1996-10-14 | 1997-08-27 | 北京矿冶研究总院 | Leaching extraction electrodeposition method for treating copper oxide ore |
-
1994
- 1994-02-01 CN CN94100937A patent/CN1073634C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072728A (en) * | 1991-11-23 | 1993-06-02 | 大冶有色金属公司铜录山铜铁矿 | Electrode potential electrolytic method |
| CN1157856A (en) * | 1996-10-14 | 1997-08-27 | 北京矿冶研究总院 | Leaching extraction electrodeposition method for treating copper oxide ore |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1106473A (en) | 1995-08-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2005275032B2 (en) | Apparatus for producing metal powder by electrowinning | |
| CN102482124B (en) | Removal of metals from water | |
| AU2008323857B2 (en) | Double contact bar insulator assembly for electrowinning of a metal and methods of use thereof | |
| RU2004102511A (en) | ELECTROLYSIS CELL FOR COMPLETING THE CONCENTRATION OF METAL IONS IN ELECTRODEPOSITION METHODS | |
| TW557332B (en) | Method and device for regulating the metal ion concentration in an electrolyte fluid | |
| CN101798131A (en) | High-efficiency electroplating wastewater treatment and resource utilization device | |
| CN102321908A (en) | Recycling and regenerating process method and metal copper recovery system of acid chloride etching solution | |
| CN202272954U (en) | System for acid chloride etching liquid cycle regeneration and metallic copper recycling | |
| CN108474124A (en) | For the filter-pressing device of the electrodeposit metals from solution, the amberplex by forming multiple anolyte chambers and catholyte chamber is formed by resolution element and constitutes, and the part that is automatically separated of electrode and metallic product is connected in series with | |
| CN111926349A (en) | A composite anode for hydrometallurgy and its preparation method and application | |
| CN101235521A (en) | A kind of energy-saving anode for non-ferrous metal electrowinning | |
| EP2653590A2 (en) | Electro-recovery of gold and silver from leaching solutions by means of simultaneous cathodic and anodic deposition | |
| CN101165215B (en) | Method and apparatus for obtaining metal powder, metal plate or metal cathode from any metal-containing material | |
| CN1073634C (en) | Membrane powersupplyless electrolysis process | |
| CN104152947A (en) | Suspended electrolyzing device for separating and recovering metals in waste circuit board | |
| US4006072A (en) | Device for eliminating impure ions in chromium plating bath | |
| CN102433581A (en) | Preparation method of novel anode material for non-ferrous metal electrodeposition | |
| JPS59143072A (en) | Method and device for regenerating copper-containing etchingsolution | |
| CN1090893A (en) | The activated cathode and the manufacture method thereof that are used for chlor-alkali electrolytic cells | |
| CN213142198U (en) | Preplating tank for acidic etching waste liquid electrolysis regeneration process | |
| US6309531B1 (en) | Process for extracting copper or iron | |
| Gana et al. | The development and applications of the anode-support system in electrochemical processes | |
| CN208545165U (en) | Intelligent circulation water treatment facilities electrode special | |
| JPH06507207A (en) | Electrolytic desilvering method | |
| CN106315772B (en) | A kind of nitrogen-doped lead dioxide electrode and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |