CN109536993A - A kind of method of electrodeposit metals zinc in eutectic solvent - Google Patents

A kind of method of electrodeposit metals zinc in eutectic solvent Download PDF

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CN109536993A
CN109536993A CN201910065065.7A CN201910065065A CN109536993A CN 109536993 A CN109536993 A CN 109536993A CN 201910065065 A CN201910065065 A CN 201910065065A CN 109536993 A CN109536993 A CN 109536993A
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eutectic solvent
carbamide
zinc
deposition
electro
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石忠宁
刘爱民
王兆文
高炳亮
胡宪伟
刘风国
陶文举
杨酉坚
于江玉
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Northeastern University China
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Northeastern University China
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    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25CPROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00Electrolytic production, recovery or refining of metals by electrolysis of solutions
    • C25C1/16Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

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  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

The invention belongs to a kind of methods of electrodeposit metals zinc in metallurgical technology field more particularly to eutectic solvent.Include the following steps: S1, under an inert atmosphere, carbamide and glyoxaline ion liquid are mixed, form carbamide-imidazoles eutectic solvent, the molar ratio of the carbamide and glyoxaline ion liquid is 1.9~2.1:1;S2, Zinc oxide powder is added in the carbamide-imidazoles eutectic solvent, stirs to get mixing liquid;S3, it inserts electrodes into the mixing liquid, carries out electrodeposition process, wherein the time of electro-deposition is 2~6h;Electrode is taken out after S4, electro-deposition, the electrolyte of cleaning electrode surface adhesion obtains metallic zinc in electrode surface after drying.Using zinc oxide as electrolysis raw material in this method, electrodeposition process anode generates oxygen, and carbamide-imidazoles eutectic solvent electrochemical window is wider, and insensitive to water and air, electrolyte can be recycled.

Description

A kind of method of electrodeposit metals zinc in eutectic solvent
Technical field
The invention belongs to a kind of methods of electrodeposit metals zinc in metallurgical technology field more particularly to eutectic solvent.
Background technique
Zinc is the fourth-largest non-ferrous metal that yield is only second to aluminium, copper and lead.One is plated on the surface of steel and steel construction piece Layer zinc, surface can generate layer protecting film at normal temperature, have excellent corrosion resistance, therefore it is zinc-plated be widely used in automobile, The industries such as building, ship, light industry.
Zinc hydrometallurgy process, including leaching, Purification of zinc sulfate solution, zinc electrolysis three big steps of deposition are mainly used at present, Wherein electrodepositing zinc is also easy to produce hydrogen embrittlement in acid system, and current efficiency is relatively low.
There are many document report about electrodeposit metals zinc in ion liquid system, because ionic liquid has certain uniquenesses Physicochemical properties, such as it is non-corrosive, hydrogen-free be precipitated, thermal stability is good, electrochemical window mouth width, fusing point are low and good conductivity Deng.Early in 1997, Printer and Hussey just reported the lewis acidity AlCl at 40 DEG C3- 1- methyl -3- ethyl miaow (AlCl in oxazolinium ion liquid3- MeEtimCl, molar ratio 60:40) electrodepositing zinc on Copper substrate, however AlCl3Base ionic liquid It is easy to absorb water in air, contains metallic aluminium in the product that electro-deposition obtains.1999, Lin and Sun discovery were in Louis Acid ZnCl2- 1- ethyl -3- methylimidazolium chloride (ZnCl2- EMIC, molar ratio 50:50) electro-deposition can be in ionic liquid Pure metallic zinc is obtained, the ionic liquid is also sensitive to water and air.In decades later, ZnCl2- EMIC ionic liquid It is used for the zinc-containing alloys such as electro-deposition Cu-Zn alloy, Cd-Zn alloy, Zn-Co alloy and Zn-Te alloy.
In addition, some researches show that ZnCl2- N- butyl-N- crassitude cdicynanmide, ZnCl2- 1- butyl -1- methylpyrrole Alkane difluoromethane sulfimide, ZnCl2Tetramethyl ammonium chloride-propene carbonate, ZnCl2Urea and ZnCl2Choline chloride (ChCl)-ethylene glycol plasma liquid can also be used for electrodepositing zinc and its alloy.But electrodeposit metals in above-mentioned ionic liquid The raw material that zinc uses is zinc chloride, also extremely harmful to human health with hygroscopicity.
Summary of the invention
(1) technical problems to be solved
For existing technical problem, the present invention provides a kind of method of electrodeposit metals zinc in eutectic solvent, Using zinc oxide as raw material in this method, zinc oxide itself is nontoxic, stablizes in surrounding air, and the cost ratio of zinc oxide The cost of zinc chloride is more economical.
(2) technical solution
The present invention provides a kind of method of electrodeposit metals zinc in eutectic solvent, includes the following steps:
S1, under an inert atmosphere mixes carbamide and glyoxaline ion liquid, and it is molten to form carbamide-imidazoles eutectic The molar ratio of agent, the carbamide and glyoxaline ion liquid is 1.9~2.1:1;
S2, Zinc oxide powder is added in the carbamide-imidazoles eutectic solvent, stirs to get mixing liquid;
S3, it inserts electrodes into the mixing liquid, carries out electrodeposition process, wherein the time of electro-deposition is 2~6h;
Electrode is taken out after S4, electro-deposition, the electrolyte of cleaning electrode surface adhesion obtains metal in electrode surface after drying Zinc.
Further, in the step S2, molar concentration of the Zinc oxide powder in mixing liquid be 0.25~ 0.49mol/L。
Further, the temperature of electro-deposition is 80~150 DEG C in the step S3.
Further, the constant potential of electro-deposition is -1.1~-1.4V vs.Ag, constant current density in the step S3 For 15~30mA/cm2
Further, in the step S2, Zinc oxide powder is added in carbamide-imidazoles eutectic solvent, stirring 12 ~for 24 hours.
Further, in the step S1, the molar ratio of carbamide and glyoxaline ion liquid is 2:1.
Further, in the step S1, the cation of glyoxaline ion liquid is 1- alkyl -3- methylimidazole, wherein Alkyl is one of ethyl, butyl, hexyl and octyl;Anion is one of fluorine, chlorine, bromine and tetrafluoro boric acid.
Further, in the step S3, electrode includes working electrode, reference electrode and auxiliary electrode;
The working electrode is one of copper, tungsten, nickel, titanium, molybdenum and stainless steel;
The reference electrode is Ag/AgCl;
The auxiliary electrode is one of tungsten, nickel, titanium, molybdenum or stainless steel.
Further, the step S2~S4 is carried out under inert atmosphere or air atmosphere.
(3) beneficial effect
The beneficial effects of the present invention are:
1, the raw material that uses is zinc oxide in the present invention, and electrode is inert metal, thus the anodic product of electrodeposition process For oxygen, cathode product is metallic zinc, and smelting process does not have the generation of exhaust gas, waste water and waste residue, the clean nothing of whole process green Pollution.
2, using urea-disubstituted imidazole eutectic solvent as electrolyte in the present invention, wherein the price of urea is relatively inexpensive, The eutectic solvent for reducing production cost, and being formed is not easy to react water and air, thus can under air atmosphere into The electro-deposition of row metal zinc.
3, disubstituted imidazole class ionic liquid electrochemical window used in the present invention is wider (about 3V), can be to avoid acidity The generation of electrodepositing zinc occurs in solution liberation of hydrogen side reaction and Hydrogen Brittleness Phenomena, thus the current efficiency of electrodeposition process is higher, Support electrolyte can recycle.
Detailed description of the invention
Fig. 1 is the XRD spectrum for the metallic zinc that electro-deposition obtains in the embodiment of the present invention 1;
Fig. 2 is the SEM spectrum for the metallic zinc that electro-deposition obtains in the embodiment of the present invention 1;
Fig. 3 is the EDS map for the metallic zinc that electro-deposition obtains in the embodiment of the present invention 1.
Specific embodiment
In order to preferably explain the present invention, in order to understand, with reference to the accompanying drawing, by specific embodiment, to this hair It is bright to be described in detail.
Embodiment 1
S1, at room temperature, by carbamide and 1- butyl -3- methylimidazolium chloride ionic liquid, 2:1 is mixed in molar ratio, control 100 DEG C of temperature processed, colourless as clear as crystal carbamide -1- butyl -3- methylimidazolium chloride eutectic solvent is formed after agitated.
S2, zinc oxide solid powder is added to carbamide -1- butyl -3- methylimidazolium chloride eutectic solvent, stirring 12h is dissolved completely in zinc oxide solid powder in carbamide -1- butyl -3- methylimidazolium chloride eutectic solvent.At this point, Molar concentration of the zinc oxide in carbamide -1- butyl -3- methylimidazolium chloride eutectic solvent is 0.49mol/L.
S3, will be using copper as working electrode, Ag/AgCl is reference electrode, and titanium is that the electrode of auxiliary electrode is inserted and contains zinc oxide Carbamide -1- butyl -3- methylimidazolium chloride eutectic solvent in, control the carbamide -1- butyl -3- first containing zinc oxide The temperature of base imidazolitm chloride eutectic solvent is 100 DEG C, and electro-deposition 2h is carried out under the conditions of constant potential -1.1V (vs.Ag).
Electrode is taken out after S4, electro-deposition, with a small amount of electrolyte of acetone and distilled water cleaning electrode surface adhesion, after dry Metallic zinc is obtained on copper surface.
The preparation of carbamide -1- butyl -3- methylimidazolium chloride eutectic solvent is being full of argon gas in the step S1 It is carried out in glove box, wherein the content of oxygen and water is lower than 0.1ppm, and the step S2~S4 is carried out under atmospheric environment.
As shown in Figure 1, 2, 3, respectively XRD, SEM and EDS map of metallic zinc obtained in the present embodiment.
Embodiment 2
S1, at room temperature, by carbamide and 1- ethyl-3-methylimidazole tetrafluoroborate, 1.9:1 is mixed in molar ratio, control 80 DEG C of temperature processed, colourless as clear as crystal carbamide -1- ethyl-3-methylimidazole tetrafluoroborate eutectic is formed after agitated Solvent.
S2, carbamide -1- ethyl-3-methylimidazole tetrafluoroborate eutectic solvent is added in zinc oxide solid powder, Stirring for 24 hours, makes zinc oxide solid powder be dissolved completely in carbamide -1- ethyl-3-methylimidazole tetrafluoroborate eutectic molten In agent.At this point, molar concentration of the zinc oxide in carbamide -1- butyl -3- methyl imidazolium tetrafluoroborate eutectic solvent is 0.25mol/L。
S3, will be using stainless steel as working electrode, Ag/AgCl is reference electrode, and tungsten is that the electrode of auxiliary electrode is inserted containing aerobic In the carbamide -1- butyl -3- methyl imidazolium tetrafluoroborate eutectic solvent for changing zinc, the carbamide-containing zinc oxide is controlled The temperature of 1- butyl -3- methyl imidazolium tetrafluoroborate eutectic solvent is 80 DEG C, in constant potential -1.4V (vs.Ag) condition Lower progress electro-deposition 6h.
Electrode is taken out after S4, electro-deposition, with a small amount of electrolyte of acetone and distilled water cleaning electrode surface adhesion, after dry Metallic zinc is obtained in stainless steel surface.
Step S1~the S4 is carried out in the glove box full of argon gas, and wherein the content of oxygen and water is lower than 0.1ppm。
Embodiment 3
S1, at room temperature, by carbamide and 1- propyl -3- methylimidazole bromide, 2:1 is mixed in molar ratio, controls temperature 120 DEG C, colourless as clear as crystal carbamide -1- propyl -3- methylimidazole bromide eutectic solvent is formed after agitated.
S2, zinc oxide solid powder is added to carbamide -1- propyl -3- methylimidazole bromide eutectic solvent, stirring 16h is dissolved completely in zinc oxide solid powder in carbamide -1- propyl -3- methylimidazole bromide eutectic solvent.At this point, Molar concentration of the zinc oxide in carbamide -1- propyl -3- methylimidazole bromide eutectic solvent is 0.45mol/L.
S3, will be using nickel as working electrode, Ag/AgCl is reference electrode, and stainless steel is that the electrode of auxiliary electrode is inserted containing aerobic In the carbamide -1- propyl -3- methylimidazole bromide eutectic solvent for changing zinc, the carbamide -1- propyl-containing zinc oxide is controlled The temperature of 3- methylimidazole bromide eutectic solvent is 120 DEG C, carries out electro-deposition under the conditions of constant potential -1.2V (vs.Ag) 6h。
Electrode is taken out after S4, electro-deposition, with a small amount of electrolyte of acetone and distilled water cleaning electrode surface adhesion, after dry Metallic zinc is obtained in nickel surface.
The preparation of carbamide -1- propyl -3- methylimidazole bromide eutectic solvent is being full of argon gas in the step S1 It is carried out in glove box, wherein the content of oxygen and water is lower than 0.1ppm, and the step S2~S4 is carried out under atmospheric environment.
Embodiment 4
S1, at room temperature, by carbamide and 1- hexyl -3- methylimidazole bromide, 2.1:1 is mixed in molar ratio, controls temperature 130 DEG C, colourless as clear as crystal carbamide -1- hexyl -3- methylimidazole bromide eutectic solvent is formed after agitated.
S2, zinc oxide solid powder is added to carbamide -1- hexyl -3- methylimidazole bromide eutectic solvent, stirring 20h is dissolved completely in zinc oxide solid powder in carbamide -1- hexyl -3- methylimidazole bromide eutectic solvent.At this point, Molar concentration of the zinc oxide in carbamide -1- hexyl -3- methylimidazole bromide eutectic solvent is 0.33mol/L.
S3, will be using tungsten as working electrode, Ag/AgCl is reference electrode, and nickel is that the electrode of auxiliary electrode is inserted and contains zinc oxide Carbamide -1- hexyl -3- methylimidazole bromide eutectic solvent in, control the carbamide -1- hexyl -3- first containing zinc oxide The temperature of base imidazoles bromide eutectic solvent is 100 DEG C, in constant current density 15mA/cm2Under the conditions of carry out electro-deposition 4h.
Electrode is taken out after S4, electro-deposition, with a small amount of electrolyte of acetone and distilled water cleaning electrode surface adhesion, after dry Metallic zinc is obtained on tungsten surface.
Step S1~the S4 is carried out in the glove box full of argon gas, and wherein the content of oxygen and water is lower than 0.1ppm。
Embodiment 5
S1, at room temperature, by carbamide and 1- octyl -3- methylimidazole villiaumite, 2:1 is mixed in molar ratio, controls temperature 150 DEG C, colourless as clear as crystal carbamide -1- octyl -3- methylimidazole villiaumite eutectic solvent is formed after agitated.
S2, zinc oxide solid powder is added to carbamide -1- octyl -3- methylimidazole villiaumite eutectic solvent, stirring 22h is dissolved completely in zinc oxide solid powder in carbamide -1- octyl -3- methylimidazole villiaumite eutectic solvent.At this point, Molar concentration of the zinc oxide in carbamide -1- octyl -3- methylimidazole villiaumite eutectic solvent is 0.41mol/L.
S3, will be using titanium as working electrode, Ag/AgCl is reference electrode, and molybdenum is that the electrode of auxiliary electrode is inserted and contains zinc oxide Carbamide -1- octyl -3- methylimidazole villiaumite eutectic solvent in, control the carbamide -1- octyl -3- first containing zinc oxide The temperature of base imidazoles villiaumite eutectic solvent is 150 DEG C, in constant current density 30mA/cm2Under the conditions of carry out electro-deposition 3h.
Electrode is taken out after S4, electro-deposition, with a small amount of electrolyte of acetone and distilled water cleaning electrode surface adhesion, after dry Metallic zinc is obtained on titanium surface.
The preparation of carbamide -1- octyl -3- methylimidazole villiaumite eutectic solvent is being full of argon gas in the step S1 It is carried out in glove box, wherein the content of oxygen and water is lower than 0.1ppm, and the step S2~S4 is carried out under atmospheric environment.
In above-described embodiment 1~5, carbamide-imidazoles eutectic solvent after electro-deposition be can be recycled.Electricity is heavy Anodic product during product is oxygen, and cathode product is metallic zinc, and smelting process does not have the generation of exhaust gas, waste water and waste residue, Whole process green is clean pollution-free.
The technical principle of the invention is described above in combination with a specific embodiment, these descriptions are intended merely to explain of the invention Principle shall not be construed in any way as a limitation of the scope of protection of the invention.Based on explaining herein, those skilled in the art It can associate with other specific embodiments of the invention without creative labor, these modes fall within this hair Within bright protection scope.

Claims (7)

1. a kind of method of electrodeposit metals zinc in eutectic solvent, which comprises the steps of:
S1, under an inert atmosphere mixes carbamide and glyoxaline ion liquid, forms carbamide-imidazoles eutectic solvent, institute The molar ratio for stating carbamide and glyoxaline ion liquid is 1.9~2.1:1;
S2, Zinc oxide powder is added in the carbamide-imidazoles eutectic solvent, stirs to get mixing liquid;
S3, it inserts electrodes into the mixing liquid, carries out electrodeposition process, wherein the time of electro-deposition is 2~6h;
Electrode is taken out after S4, electro-deposition, the electrolyte of cleaning electrode surface adhesion obtains metallic zinc in electrode surface after drying.
2. the method for electrodeposit metals zinc in eutectic solvent according to claim 1, which is characterized in that the step S2 In, molar concentration of the Zinc oxide powder in mixing liquid is 0.25~0.49mol/L.
3. the method for electrodeposit metals zinc in eutectic solvent according to claim 1, which is characterized in that the step S3 The temperature of middle electro-deposition is 80~150 DEG C.
4. the method for electrodeposit metals zinc in eutectic solvent according to claim 1, which is characterized in that the step S3 The constant potential of middle electro-deposition is -1.1~-1.4V vs.Ag, and constant current density is 15~30mA/cm2
5. the method for electrodeposit metals zinc in eutectic solvent according to claim 1, which is characterized in that the step S2 In, Zinc oxide powder is added in carbamide-imidazoles eutectic solvent, stirring 12~for 24 hours.
6. the method for electrodeposit metals zinc in eutectic solvent according to claim 1, which is characterized in that the step S1 In, the molar ratio of carbamide and glyoxaline ion liquid is 2:1.
7. the method for electrodeposit metals zinc in eutectic solvent according to claim 1, which is characterized in that the step S1 In, the cation of glyoxaline ion liquid is 1- alkyl -3- methylimidazole, wherein alkyl is ethyl, butyl, hexyl and octyl One of;Anion is one of fluorine, chlorine, bromine and tetrafluoro boric acid.
CN201910065065.7A 2019-01-23 2019-01-23 A kind of method of electrodeposit metals zinc in eutectic solvent Pending CN109536993A (en)

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CN111826691A (en) * 2020-08-21 2020-10-27 东北大学 Method for preparing zinc-tantalum alloy by using solvated ionic liquid
CN113088856A (en) * 2021-03-31 2021-07-09 江西科技师范大学 Deep eutectic solvent hot galvanizing additive and preparation method and application thereof
CN113881977A (en) * 2021-11-12 2022-01-04 东北大学 Method for preparing zinc-titanium alloy at low temperature by taking titanium oxycarbide as anode

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111826691A (en) * 2020-08-21 2020-10-27 东北大学 Method for preparing zinc-tantalum alloy by using solvated ionic liquid
CN111826691B (en) * 2020-08-21 2021-09-21 东北大学 Method for preparing zinc-tantalum alloy by using solvated ionic liquid
CN113088856A (en) * 2021-03-31 2021-07-09 江西科技师范大学 Deep eutectic solvent hot galvanizing additive and preparation method and application thereof
CN113088856B (en) * 2021-03-31 2022-12-23 江西科技师范大学 Deep eutectic solvent hot galvanizing additive and preparation method and application thereof
CN113881977A (en) * 2021-11-12 2022-01-04 东北大学 Method for preparing zinc-titanium alloy at low temperature by taking titanium oxycarbide as anode

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Application publication date: 20190329