CN105161746A - Method for preparing vanadium battery electrolyte from acid vanadium-enriched liquid - Google Patents
Method for preparing vanadium battery electrolyte from acid vanadium-enriched liquid Download PDFInfo
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- CN105161746A CN105161746A CN201510564743.6A CN201510564743A CN105161746A CN 105161746 A CN105161746 A CN 105161746A CN 201510564743 A CN201510564743 A CN 201510564743A CN 105161746 A CN105161746 A CN 105161746A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/002—Inorganic electrolyte
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- 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention belongs to the field of batteries, and in particular to a method for preparing vanadium battery electrolyte from acid vanadium-enriched liquid. The method for preparing the vanadium battery electrolyte from the acid vanadium-enriched liquid after oxygen-enriched roasting comprises the following steps: performing acid leaching on vanadium slag, extracting and removing impurities, acidizing and reducing; by taking advantage of the characteristic that acid phosphorus extracting agent has high selectivity on +4 valence vanadium and low extracting rate on +5 valence vanadium in acid conditions, impurities having obvious influences on the property of the vanadium electrolyte are removed by extraction, and then the vanadium electrolyte is reduced to directly prepare the vanadium electrolyte used for the vanadium batteries. The method is short in production process, less in steps, environment-friendly and energy-saving; sewage is not produced in the production process, so that the washing water can be recycled; and the prepared battery is high in efficiency, the coulombic efficiency is greater than or equal to 90%, and the energy efficiency is greater than or equal to 70%.
Description
Technical field
The invention belongs to field of batteries, be specifically related to a kind of method utilizing rich acidic vanadium leachate directly to prepare electrolyte of vanadium redox battery.
Background technology
Vanadium cell is a kind of Novel pollution-free chemical energy storage power supply, is flow battery, does not have solid-state reaction, the change of the structure of matter does not occur, and low price, therefore develop vanadium cell and can alleviate energy shortage situation.Vanadium cell is flow battery, and the quality of electrolyte directly determines the energy storage capacity of battery, finds the suitable method preparing electrolyte of vanadium redox battery very important to vanadium cell exploitation.
At present, what the method preparing electrolyte was comparatively commonly used is by the V of solid
2o
5dissolve in sulfuric acid, then be prepared into electrolyte of vanadium redox battery through electrolysis or reduction.But solid V
2o
5solvability is not very strong, when using it to prepare electrolyte, need carry out purifying, the process such as activation.Leaching, washing, precipitation need be passed through from solution containing vanadium to electrolyte, wash again, dry, calcine, the step such as purification, period has large amount of sewage and produces, and the loss amount of vanadium is large, and production procedure is oversize.Use vanadic sulfate directly to dissolve and prepare electrolyte, the price of vanadic sulfate is too high, is not suitable for vanadium cell and uses on a large scale.Also solid V can be utilized
2o
5after adding sulfuric acid, Direct Electrolysis prepares electrolyte, but the method is to V
2o
5utilance is low, and energy consumption is high, seldom uses in the application of reality.
Such as: application number is " 201310037756.9 ", denomination of invention is " a kind of method preparing high-purity vanadium battery electrolyte based on extraction-back extraction system ", disclose a kind of method preparing high-purity vanadium battery electrolyte based on Cui Qu – back extraction system: to contain vanadium leachate for raw material, use the extraction of organic phosphoric acid kind of extractants; Extraction gained organic phase uses sulfuric acid back extraction again; Back extraction gained sulfuric acid phase directly obtains electrolyte of vanadium redox battery through gaseous reducing agent reduction.Electrolyte of vanadium redox battery prepared by this invention employs phosphorus-contained extractant and sulfuric acid strippant is raw material, and the sulfuric acid phase obtained also needs through gas reduction process, and technique is more complicated, has certain injury to environment and human body.
Application number is " 201410265348.3 ", denomination of invention is " a kind of preparation method of efficient vanadic sulfate electrolyte ", disclose a kind of by steps such as extraction vanadic sulfate solution, inorganic reduction vanadic sulfate solution, mixed extractant preparation, vanadic sulfate reextraction, organic reducing vanadic sulfate anti-stripping agent, vanadic sulfate electrolyte precursor concentrate, prepare a kind of highly purified vanadic sulfate electrolyte.Complex process, oxygen acid oxygen alum price is high, process costs is increased, is not suitable for the large-scale production of vanadium cell.
Summary of the invention
It is few that technical problem to be solved by this invention is to provide a kind of production procedure, without vanadium loss, and the preparation method of the electrolyte for vanadium cell that battery efficiency is high.
Rich acidic vanadium liquid of the present invention prepares the method for electrolyte of vanadium redox battery, comprises the following steps:
A, acidleach vanadium slag: vanadium slag is used dilute sulfuric acid acidleach, obtain the vanadium leachate of vanadium concentration >=1mol/L;
B, abstraction impurity removal: by volume, get extractant: diluent=1:3 ~ 5, dilution extractant; Then saponification agent is utilized to carry out saponification, first stage saponification degree 10 ~ 30% to the extractant after dilution, the vanadium immersion liquid that extraction a step obtains; Second stage saponification degree 30 ~ 50%, then extract, until impurity content < 10ppm in vanadium immersion liquid;
C, acidifying reduction: get the liquid phase after b step extraction, add the concentrated sulfuric acid while stirring, obtain rich acidic vanadium liquid; Pass into reducing gas to reduce, until V in solution
5+all change into V
4+.
Rich acidic vanadium liquid described above prepares the method for electrolyte of vanadium redox battery, in a step by through oxygen-enriched air roasting and levigate vanadium slag through screening after, Vanadium in Vanadium Residue content is selected to be 10% ~ 20%, granularity < 120 object powder dilute sulfuric acid leaches, obtain leachate, then add the washings of each washing vanadium slag, secondary leaching is carried out to vanadium slag, so repeatedly, until vanadium concentration >=1mol/L in leachate.
Rich acidic vanadium liquid described above prepares the method for electrolyte of vanadium redox battery, and the extractant in b step after dilution is divided into equivalent six parts, and extraction point is carried out for six times; Extract three times after first stage saponification, carry out 10 ~ 20min at every turn, effectively can remove impurity violent, iron, the aluminium element of more than 80%; Extract three times after second stage saponification, carry out 10 ~ 20min at every turn, after having reacted, impurity element in vanadium solution can be made, such as the total content < 10ppm of manganese, iron, aluminium, calcium, magnesium etc.The present invention utilizes the extractant after to dilution to carry out saponification, make full use of right+4 valency vanadium of acid phosphorus extractant under acid condition and there is high selectivity and the not high characteristic of right+5 valency vanadium extraction yields, the vanadium of maximum is retained while abstraction impurity removal matter ion, thus reach the object of purification vanadium, meanwhile, respectively taked to rich vanadium liquid two stages, utilize the extractant of different saponification value, be divided into six extractions, remove the impurity element in rich vanadium liquid.The present invention is according to the total content of impurity manganese, aluminium, calcium, magnesium, iron, determine the consumption of extractant, wherein the addition of extractant is determined according to the valence state of impurities concentration and kind and impurity in solution, monovalence impurity adds the extractant of identical amount, divalence adds the extractant of 2 times, the like, finally add and be exactly the amount of the extractant that needs add.
Further, as preferred technical scheme, rich acidic vanadium liquid described above prepares the method for electrolyte of vanadium redox battery, is preferably by volume, gets extractant: diluent=1:4 in b step, dilution extractant.Adding diluent dilution extractant in the present invention is to reduce extractant proportion and viscosity, is conducive to two-phase flow and is separated.
Described rich acidic vanadium liquid described above prepares the method for electrolyte of vanadium redox battery, and wherein extractant is at least one in di (isooctyl) phosphate (P204), di-2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (P507), Cyanex272, Cyanex301, Cyanex302; Described diluent is 260
#solvent naphtha is also sulfonated kerosene; In order to not bring other impurity into, described saponification agent is ammoniacal liquor.
Further, as preferred technical scheme, extractant described above is di (isooctyl) phosphate.
In the present invention, in step c, concentrated sulfuric acid addition is determined according to required acidity and sulfate concentration, and the addition of sulfuric acid prepares according to the V electrolyte of variable concentrations, do not have unified requirement.
Rich acidic vanadium liquid described above prepares the method for electrolyte of vanadium redox battery, and in order to not bring other impurity into, wherein in step c, reducibility gas is SO
2, H
2, H
2one in S, is preferably as SO
2.
Rich acidic vanadium liquid described above prepares the method for electrolyte of vanadium redox battery, wherein the dilute sulfuric acid of acidleach vanadium slag to be pH value be 1.5 ~ 3.5 sulfuric acid; The concentrated sulfuric acid refers to the sulfuric acid of normal concentration > 70%, the concentrated sulfuric acid of prioritizing selection sulfuric acid concentration 70 ~ 90% of the present invention.
Extract each time in abstraction impurity removal process of the present invention, vanadium can lose 0.4 ~ 1.5g, needs to consider when calculating V electrolyte concentration.But in order to economize on resources, avoid waste, after preparing V electrolyte, later stage can strip the vanadium being extracted out in removal of impurities, and because impurity is also suggested simultaneously, vanadium now can not be used further in V electrolyte, but can be used for preparing iron and steel vanadium product, therefore vanadium does not almost lose.
Rich acidic vanadium liquid of the present invention prepares the method for electrolyte of vanadium redox battery, has following beneficial effect:
1. production procedure is short, few: acid solution containing vanadium be directly prepared into electrolyte and existingly utilize solid V
2o
5prepare electrolyte method, production procedure is short, and step is few, and cost is low.V
2o
5prepare electrolyte flow process to be generally: vanadium slag roasting abrasive dust, vanadium leaching, precipitation, washing, calcination, V
2o
5purification, V
2o
5acid-soluble, reduction, and by the step that solution containing vanadium prepares electrolyte be: the leaching of vanadium slag roasting abrasive dust, vanadium, purification, acid adjustment degree, reduction.
2. environmental protection and energy saving: do not produce sewage in production process, washings can be recycled, and namely in Leaching Vanadium process, the washings of washing vanadium slag can continue for vanadium extraction, recycle.
3. lose without vanadium: washings can continue for vanadium extraction, can avoid because washing the vanadium lost, the vanadium simultaneously entering extraction oil phase can propose with back extraction, though also can be suggested with its metal impurities entered simultaneously while proposing, can not be used further in V electrolyte, but it may be used for preparing iron and steel vanadium product, therefore loses without vanadium.
4. battery efficiency is high: carry out charge-discharge test, its coulombic efficiency >=90%, energy efficiency >=70% with vanadium cell prepared by the rich vanadium liquid of the present invention.
Embodiment
Rich acidic vanadium liquid of the present invention prepares the method for electrolyte of vanadium redox battery, comprises the following steps:
A, acidleach vanadium slag: vanadium slag is used dilute sulfuric acid acidleach, obtain the vanadium leachate of vanadium concentration >=1mol/L;
B, abstraction impurity removal: by volume, get extractant: diluent=1:3 ~ 5, dilution extractant; Then saponification agent is utilized to carry out saponification, first stage saponification degree 10 ~ 30% to the extractant after dilution, the vanadium immersion liquid that extraction a step obtains; Second stage saponification degree 30 ~ 50%, then extract, until impurity content < 10ppm in vanadium immersion liquid;
C, acidifying reduction: get the liquid phase after b step extraction, add the concentrated sulfuric acid while stirring, obtain rich acidic vanadium liquid; Pass into reducing gas to reduce, until V in solution
5+all change into V
4+.
Rich acidic vanadium liquid described above prepares the method for electrolyte of vanadium redox battery, in a step by through oxygen-enriched air roasting and levigate vanadium slag through screening after, Vanadium in Vanadium Residue content is selected to be 10% ~ 20%, granularity < 120 object powder dilute sulfuric acid leaches, obtain leachate, then add the washings of each washing vanadium slag, secondary leaching is carried out to vanadium slag, so repeatedly, until vanadium concentration >=1mol/L in leachate.
Rich acidic vanadium liquid described above prepares the method for electrolyte of vanadium redox battery, and the extractant in b step after dilution is divided into equivalent six parts, and extraction point is carried out for six times; Extract three times after first stage saponification, carry out 10 ~ 20min at every turn, effectively can remove impurity violent, iron, the aluminium element of more than 80%; Extract three times after second stage saponification, carry out 10 ~ 20min at every turn, after having reacted, impurity element in vanadium solution can be made, such as suddenly, the total content < 10ppm of iron, aluminium, calcium, magnesium etc.The present invention utilizes the extractant after to dilution to carry out saponification, make full use of right+4 valency vanadium of acid phosphorus extractant under acid condition and there is high selectivity and the not high characteristic of right+5 valency vanadium extraction yields, the vanadium of maximum is retained while abstraction impurity removal matter ion, thus reach the object of purification vanadium, meanwhile, respectively taked to rich vanadium liquid two stages, utilize the extractant of different saponification value, be divided into six extractions, remove the impurity element in rich vanadium liquid.The present invention is according to the total content of impurity manganese, aluminium, calcium, magnesium, iron, determine the consumption of extractant, wherein the addition of extractant is determined according to the valence state of impurities concentration and kind and impurity in solution, monovalence impurity adds the extractant of identical amount, divalence adds the extractant of 2 times, the like, finally add and be exactly the amount of the extractant that needs add.
The present invention generates ammonium salt after carrying out saponification to extractant, and metal ion such as vanadium, manganese, iron, calcium etc. in the part replaced by ammonium root during extraction and aqueous phase react, thus reach the object removing foreign ion.
Further, as preferred technical scheme, rich acidic vanadium liquid described above prepares the method for electrolyte of vanadium redox battery, is preferably by volume, gets extractant: diluent=1:4 in b step, dilution extractant.Adding diluent dilution extractant in the present invention is to reduce extractant proportion and viscosity, is conducive to two-phase flow and is separated.
Described rich acidic vanadium liquid described above prepares the method for electrolyte of vanadium redox battery, and wherein extractant is at least one in di (isooctyl) phosphate (P204), di-2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (P507), Cyanex272, Cyanex301, Cyanex302; Described diluent is 260
#solvent naphtha; In order to not bring other impurity into, described saponification agent is ammoniacal liquor.Wherein, the main component of Cyanex272 of the present invention is two (2,4,4-tri-methyl-amyl) phosphinic acids, Cyanex302 main component be two (2,4,4-tri-methyl-amyl) hypophosphorous acid, the main component of Cyanex301 is two (2,4,4-tri-methyl-amyl) dithiophosphinic acid.
Further, as preferred technical scheme, extractant described above is di (isooctyl) phosphate.
In the present invention, in step c, concentrated sulfuric acid addition is determined according to required acidity and sulfate concentration, and the addition of sulfuric acid prepares according to the V electrolyte of variable concentrations, do not have unified requirement.
Rich acidic vanadium liquid described above prepares the method for electrolyte of vanadium redox battery, and in order to not bring other impurity into, wherein in step c, reducibility gas is SO
2, H
2, H
2one in S, is preferably as SO
2.
When the said saponification degree 10 ~ 30% of the present invention refers to and extracts with acid phosphorus extractant, the pH value of system can because the metal ion in extraction phase be replaced, the H on P204
+enter extraction liquid phase, the pH value of system is changed, therefore it is constant to add alkali maintenance pH value, general 1gP204 is fully saponified needs 0.1088g ammoniacal liquor, therefore saponification degree 10 ~ 30% here refers to the grams of the ammoniacal liquor needed for saponification 1gP204, select different saponification degree to be pH value in order to regulate whole system, because extractant under different pH is different to the extracting power of foreign metal ion and speed, be also to suppress P204 to the extraction of vanadium ion simultaneously.
Rich acidic vanadium liquid described above prepares the method for electrolyte of vanadium redox battery, wherein the dilute sulfuric acid of acidleach vanadium slag to be pH value be 1.5 ~ 3.5 sulfuric acid; The concentrated sulfuric acid refers to the sulfuric acid of normal concentration > 70%, and the present invention selects the concentrated sulfuric acid of sulfuric acid concentration 70 ~ 90%.
Extract each time in abstraction impurity removal process of the present invention, vanadium can lose 0.4 ~ 1.5g, needs to consider when calculating V electrolyte concentration.But in order to economize on resources, avoid waste, after preparing V electrolyte, later stage can strip the vanadium being extracted out in removal of impurities, and because impurity is also suggested simultaneously, vanadium now can not be used further in V electrolyte, but can be used for preparing iron and steel vanadium product, therefore vanadium does not almost lose.
Below in conjunction with embodiment, the specific embodiment of the present invention is further described, does not therefore limit the present invention among described scope of embodiments.
Embodiment 1
1, rich acidic vanadium liquid is utilized to prepare electrolyte of vanadium redox battery
A, acidleach vanadium slag: by oxygen-enriched air roasting and levigate vanadium slag sieve, get the powder of below < 120 order, use dilute sulfuric acid acidleach, the pickle liquor obtained after getting acidleach adds that vanadium slag washings carry out secondary leaching to vanadium slag; Repeat this step, until vanadium concentration is 53g/L in leachate, get this leachate 200mL;
B, abstraction impurity removal: by volume, get extractant: diluent=1:4, gets the extractant 20mL after dilution; Then utilize ammoniacal liquor to carry out saponification to the extractant after dilution, the first stage gets the extractant that saponification degree is 15%, the vanadium immersion liquid 15min that extraction a step obtains, and after static 10min, separatory, gets liquid phase; By the same way, then extracting twice; Second stage get saponification degree be 35% extractant according to the method for first stage, three times are extracted again to vanadium solution, get liquid phase;
C, acidifying reduction: get the liquid phase after b step extraction, add the 100mL concentrated sulfuric acid while stirring, obtain rich acidic vanadium liquid; SO is passed into after solution cooling
2reduce, until V in solution
5+all change into V
4+.
2, electrolyte of vanadium redox battery electrochemical property test
Loaded in vanadium cell by the electrolyte of vanadium redox battery of above-mentioned preparation and carry out charge and discharge cycles 100 times, its coulombic efficiency is 94.5%, and energy efficiency is 72.3%.
Embodiment 2
1, rich acidic vanadium liquid is utilized to prepare electrolyte of vanadium redox battery
A, acidleach vanadium slag: by oxygen-enriched air roasting and levigate vanadium slag sieve, get the powder of below < 120 order, use dilute sulfuric acid acidleach, the pickle liquor obtained after getting acidleach adds that vanadium slag washings carry out secondary leaching to vanadium slag; Repeat this step, until vanadium concentration is 80g/L in leachate, get this leachate 200mL;
B, abstraction impurity removal: by volume, get extractant: diluent=1:4, gets the extractant 30mL after dilution; Then utilize ammoniacal liquor to carry out saponification to the extractant after dilution, the first stage gets the extractant that saponification degree is 20%, the vanadium immersion liquid 15min that extraction a step obtains, and after static 10min, separatory, gets liquid phase; By the same way, then extracting twice; Second stage get saponification degree be 40% extractant according to the method for first stage, three times are extracted again to vanadium solution, get liquid phase;
C, acidifying reduction: get the liquid phase after b step extraction, add the 120mL concentrated sulfuric acid while stirring, obtain rich acidic vanadium liquid; SO is passed into after solution cooling
2reduce, until V in solution
5+all change into V
4+.
2, electrolyte of vanadium redox battery electrochemical property test
Loaded in vanadium cell by the electrolyte of vanadium redox battery of above-mentioned preparation and carry out charge and discharge cycles 100 times, its coulombic efficiency is 92.5%, and energy efficiency is 70.9%.
Embodiment 3
1, rich acidic vanadium liquid is utilized to prepare electrolyte of vanadium redox battery
A, acidleach vanadium slag: by oxygen-enriched air roasting and levigate vanadium slag sieve, get the powder of below < 120 order, use dilute sulfuric acid acidleach, the pickle liquor obtained after getting acidleach adds that vanadium slag washings carry out secondary leaching to vanadium slag; Repeat this step, until vanadium concentration is 106g/L in leachate, get this leachate 200mL;
B, abstraction impurity removal: by volume, get extractant: diluent=1:4, gets the extractant 40mL after dilution; Then utilize ammoniacal liquor to carry out saponification to the extractant after dilution, the first stage gets the extractant that saponification degree is 25%, the vanadium immersion liquid 15min that extraction a step obtains, and after static 10min, separatory, gets liquid phase; By the same way, then extracting twice; Second stage get saponification degree be 45% extractant according to the method for first stage, three times are extracted again to vanadium solution, get liquid phase;
C, acidifying reduction: get the liquid phase after b step extraction, add the 140mL concentrated sulfuric acid while stirring, obtain rich acidic vanadium liquid; SO is passed into after solution cooling
2reduce, until V in solution
5+all change into V
4+.
2, electrolyte of vanadium redox battery electrochemical property test
Loaded in vanadium cell by the electrolyte of vanadium redox battery of above-mentioned preparation and carry out charge and discharge cycles 100 times, its coulombic efficiency is 96.1%, and energy efficiency is 71.6%.
Claims (9)
1. rich acidic vanadium liquid prepares the method for electrolyte of vanadium redox battery, it is characterized in that: comprise the following steps:
A, acidleach vanadium slag: vanadium slag is used dilute sulfuric acid acidleach, obtain the vanadium leachate of vanadium concentration >=1mol/L;
B, abstraction impurity removal: by volume, get extractant: diluent=1:3 ~ 5, dilution extractant; Then saponification agent is utilized to carry out saponification, first stage saponification degree 10 ~ 30% to the extractant after dilution, the vanadium immersion liquid that extraction a step obtains; Second stage saponification degree 30 ~ 50%, then extract, until impurity content < 10ppm in vanadium immersion liquid;
C, acidifying reduction: get the liquid phase after b step extraction, add the concentrated sulfuric acid while stirring, obtain rich acidic vanadium liquid; Pass into reducing gas to reduce, until V in solution
5+all change into V
4+.
2. rich acidic vanadium liquid prepares the method for electrolyte of vanadium redox battery according to claim 1, it is characterized in that: vanadium slag < 120 order in a step, wherein content of vanadium is 10 ~ 20%.
3. according to claim 1 or 2, rich acidic vanadium liquid prepares the method for electrolyte of vanadium redox battery, it is characterized in that: to the acidleach of vanadium slag dilute sulfuric acid, the pickle liquor obtained after getting acidleach adds that vanadium slag washings carry out more than secondary and secondary to vanadium slag and leach, until vanadium concentration >=1mol/L in vanadium leachate.
4. rich acidic vanadium liquid prepares the method for electrolyte of vanadium redox battery according to claim 1, it is characterized in that: the extractant in b step after dilution is divided into equivalent six parts, coextraction six times; Extract three times after first stage saponification, extract three times after second stage saponification, carry out 10 ~ 20min at every turn.
5. rich acidic vanadium liquid prepares the method for electrolyte of vanadium redox battery according to claim 1, it is characterized in that: in b step by volume, gets extractant: diluent=1:4, dilution extractant.
6. according to any one of Claims 1 to 4, rich acidic vanadium liquid prepares the method for electrolyte of vanadium redox battery, it is characterized in that: extractant is at least one in di (isooctyl) phosphate, di-2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester, Cyanex272, Cyanex301, Cyanex302; Described diluent is 260
#solvent naphtha; Described saponification agent is ammoniacal liquor.
7. rich acidic vanadium liquid prepares the method for electrolyte of vanadium redox battery according to claim 5, it is characterized in that: extractant is di (isooctyl) phosphate.
8. rich acidic vanadium liquid prepares the method for electrolyte of vanadium redox battery according to claim 1, it is characterized in that: in step c, reducibility gas is SO
2, H
2, H
2one in S.
9. rich acidic vanadium liquid prepares the method for electrolyte of vanadium redox battery according to claim 1, it is characterized in that: dilute sulfuric acid refers to that pH value is the sulfuric acid of 1.5 ~ 3.5; The concentrated sulfuric acid refers to the sulfuric acid of normal concentration > 70%, the concentrated sulfuric acid of preferred sulfuric acid concentration 70 ~ 90%.
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Cited By (5)
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| CN105895947A (en) * | 2016-04-25 | 2016-08-24 | 陈友根 | Preparation method for vanadium battery electrolyte |
| CN106410250A (en) * | 2016-11-11 | 2017-02-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for recycling ineffective electrolyte of vanadium redox battery |
| CN109065906A (en) * | 2018-09-27 | 2018-12-21 | 成都先进金属材料产业技术研究院有限公司 | The regeneration method of failure electrolyte of vanadium redox battery |
| CN111342102A (en) * | 2020-04-03 | 2020-06-26 | 武汉科技大学 | Preparation method of vanadium battery electrolyte based on vanadium compound |
| CN114156515A (en) * | 2021-11-06 | 2022-03-08 | 江西钒业科技有限公司 | Preparation method of vanadyl sulfate electrolyte prepared from vanadium slag |
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| CN104342567A (en) * | 2014-11-05 | 2015-02-11 | 攀枝花兴辰钒钛有限公司 | Method for extracting vanadium from high-calcium vanadium containing material |
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