CN104310475A - Method for preparing vanadyl sulfate solution - Google Patents
Method for preparing vanadyl sulfate solution Download PDFInfo
- Publication number
- CN104310475A CN104310475A CN201410472915.2A CN201410472915A CN104310475A CN 104310475 A CN104310475 A CN 104310475A CN 201410472915 A CN201410472915 A CN 201410472915A CN 104310475 A CN104310475 A CN 104310475A
- Authority
- CN
- China
- Prior art keywords
- acid
- reductive agent
- vanadylic sulfate
- sulfate solution
- catechin
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G31/00—Compounds of vanadium
-
- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
The invention relates to the technical field of electrolytes, and concretely relates to a method for preparing a vanadyl sulfate solution. The preparation method uses a reducing agent, and the reducing agent is a purely natural product, has a strong reducing ability, is nontoxic to human bodies, and can solve the problems of large consumption and various pollutions due to residual of reducing agents in the prior art. The preparation method also solves the problems of low concentration, complex process flow and production cost increase caused by high requirements on a device of a vanadyl sulfate solution electrolyte prepared through relevant technologies.
Description
Technical field
The present invention relates to technical field of electrolyte, in particular to a kind of method for the preparation of vanadylic sulfate.
Background technology
All-vanadium flow oxidation reduction cell (all vanadium redox flow battery, VRB) there is long service life, charge and discharge system is flexible, can the discharge and recharge of the big current degree of depth, without the plurality of advantages such as crossed contamination and power loss, be considered to the green energy-storing battery most with application prospect.As the electrolytic solution of all-vanadium flow oxidation reduction cell core, receive and pay close attention to widely.Usually, vanadium cell mainly adopts vanadylic sulfate (VOSO 4) solution as the electrolytic solution of battery, so the preparation method of vanadylic sulfate and quality directly affect the performance of electrolytic solution.
Usually synthesize vanadylic sulfate electrolytic solution by the following technical solutions: method one, V2O5 puts into sulfuric acid heating for dissolving, then cools dilution, add reductive agent reduction, evaporative crystallization after reacting completely, dehydration, obtained VOSO4 light-blue powder.Conventional reductive agent has oxalic acid, acetic acid, tartrate, hydrogen sulfide, sulfurous acid or has the metal-salt of reductibility.Method two, the sulfuric acid mixtures such as electrolysis barium oxide, ammonium vanadate prepare vanadylic sulfate solution, obtain vanadylic sulfate crystal through condensing crystal.
But the technical scheme in above-mentioned correlation technique at least exists following problem: if employing method one, can only utilize limited several reductive agents that V2O5 is reduced into VOSO4 soluble in water, and the concentration of vanadylic sulfate obtained is like this not high.Further, owing to using reductive agent, the impurity introduced by reductive agent not easily removes, and such as, when reductive agent employing oxalic acid, acetic acid, tartrate etc., because this reductive agent reductibility is weak, reagent consumption is large, and excessive material not easily removes; When reductive agent adopts hydrogen sulfide, its reducing property is good, and speed of response is fast, but hydrogen sulfide meltage in water is few, toxicity is large, and contaminate environment also endangers health, when reductive agent adopts sulfurous acid, sulfurous acid is unstable, and solution overflows a large amount of sulfurous gas in reaction process, contaminate environment; When reductive agent employing has the metal-salt of reductibility, then easily introduce metallic impurity, the vanadylic sulfate solution quality that impact is obtained.In addition, the reaction needed of sulfuric acid dissolution V2O5 is carried out under 300 DEG C of high temperature, so just higher to the equipment requirements of reaction.If adopt method two to prepare vanadylic sulfate, then there is the problems such as ammonium radical ion not easily removes, and process time is long, and efficiency is low.
Due to the electrolytic solution starting material that vanadylic sulfate is all-vanadium flow oxidation reduction cell, its preparation technology and preparation method directly have influence on the performance of electrolytic solution, some compositions wherein existed in the electrolytic solution, as vanadic salts, residue reductive agent have larger impact to electrolytical performance, especially affect the activity of electrolytic solution and long-term cyclical stability.Therefore, the industrialization of all-vanadium flow oxidation reduction cell system low cost can obtain the preparation method of vanadylic sulfate, processing condition and new electrolyte formula system, to adapt to all-vanadium flow oxidation reduction cell low cost, highly active user demand in the urgent need to new.
Summary of the invention
The present invention aims to provide a kind of method for the preparation of vanadylic sulfate, a kind of reductive agent is make use of in the preparation method that the present invention adopts, this reductive agent is entirely pure natural product, reducing power is strong, to the effect of human non-toxic's evil, can solve reductive agent consumption in prior art large, and reductive agent remains caused various pollution problems.Further, preparation method provided by the invention can also solve that the vanadylic sulfate concentration of electrolyte that the preparation that exists in correlation technique draws is not high, and technical process is complicated, higher to the requirement of equipment and production cost that is that cause increases problem.
An object of the present invention is to provide a kind of method preparing vanadylic sulfate solution, and the method comprises:
A, diluting concentrated sulfuric acid is become the dilute sulphuric acid of 3-5M, in described dilute sulphuric acid, add Vanadium Pentoxide in FLAKES, and fully stir;
B, add reductive agent, fully stir obtained described vanadylic sulfate solution;
C, filter described vanadylic sulfate solution, by filtrate evaporative crystallization;
D, slough crystal water, obtain vanadylic sulfate powder;
E, vanadylic sulfate powder and sulfuric acid are mixed with vanadylic sulfate solution;
Wherein, described reductive agent be selected from flavanols compounds, tree peony anthocyanins, flavonoid compound, flavonoid drugs, phenolic acid compound, vitamin substances any one or multiple.
Lift in specific embodiment in the present invention, the flavanols compounds of employing can be in training catechin, catechin, l-Epicatechol, afzelechin any one or multiple; The tree peony anthocyanins adopted can be one or more in Cyanidin, delphinidin, pelargonin, peonidin, high mallow element; Flavonoid compound can be scutellarin or baicalin, or the mixture of the two; Flavonols can be Quercetin or rutin, or the mixture of the two; Phenolic acid compound be selected from gallic acid, Protocatechuic Acid, gallic acid any one or multiple; Vitamin substances is selected from vitamins C or derivatives thereof.
Described reductive agent is tea-polyphenol, and wherein the content of catechin is greater than 60% of each composition total amount of tea-polyphenol.
Described reductive agent is vitamins C.
Reductive agent joins in reaction system with the ratio of weightmeasurement ratio 0.1% ~ 20% in stepb.
Embodiment
The object of the present invention is to provide a kind of pure natural, non-harmful reductive agent, this reductive agent be selected from flavanol compound, anthocyanin class, flavonoid, flavonols, phenolic acids, vitamin substances any one or multiple, this reductive agent may be used on preparing in the technique of vanadylic sulfate.
Indication flavanols compounds of the present invention is a kind of natural phant compound, is a subclass of flavonoid substances.Content in apple, grape, red wine, tea, cocoa powder and chocolate is very abundant.Flavanols compounds has carries protogenic molecular structure, therefore has reductibility.The specific embodiment of the invention adopt flavanols compounds can be selected from training catechin, catechin, l-Epicatechol or afzelechin in one or more.
Anthocyanogen is the compounds that cyanidin(e) is combined into glycosidic link with sugar, is to present a red compounds of group in flavonoid, is extensively present in the enchylema of the flower of plant, fruit, stem, leaf and root organ.Tree peony anthocyanins has carries protogenic molecular structure, has reductibility.The anthocyanogen that the embodiment of the present invention is selected can be selected from Cyanidin, delphinidin, pelargonin, peonidin or high mallow element one or more.
Flavonoid compound is that a class is present in natural, to have 2-phenyl chromone structure compound, it plant growth, grow, bloom, in result and antibacterial diseases prevention etc., play an important role.There is cross conjugation system in flavonoid compound molecule, proton can be provided in the reaction, there is reductibility.The flavonoid compound that the specific embodiment of the invention is selected is scutellarin, baicalin or its mixture.
Flavonoid drugs, is also called flavanone kind composition, is the natural product that nature extensively exists, and be many vegeto-animal important main components, common flavonol mainly contains ampelopsin, Quercetin and kaempferol.The flavonoid drugs that the specific embodiment of the invention is selected is Quercetin and rutin or its mixture.
Phenolic acid compound (phenolic acid) refers to the compounds same phenyl ring having several phenolic hydroxyl group.As: coffic acid, chlorogenic acid, gallic acid, gallic acid, Protocatechuic Acid, forulic acid, meson acid etc.There is physiologically active widely, as anti-oxidant, scavenging free radicals, ultra-violet radiation resisting, inhibitory effect and antivirus action, in medicine, agricultural chemicals, cosmetic material and food reductive agent etc., have purposes widely.The phenolic acid compound that the embodiment of the present invention is selected be selected from gallic acid, Protocatechuic Acid or gallic acid one or more.
VITAMIN maintains the required type organic matter of human life activity, is also the important active substances keeping HUMAN HEALTH.The VITAMIN that the embodiment of the present invention is selected can be vitamins C or its derivative, as vitamin C phosphoric ester.
Visible, above material is present in natural animals and plants all widely, is entirely the chemical composition of green non-pollution.These materials all have stronger reductibility because of there is unsaturated link(age) in chemical structural formula.
The method concrete steps preparing vanadylic sulfate provided by the invention are as follows:
A, diluting concentrated sulfuric acid is become the dilute sulphuric acid of 3-5M, in described dilute sulphuric acid, add Vanadium Pentoxide in FLAKES, and fully stir;
B, add reductive agent, fully stir obtained described vanadylic sulfate solution;
C, filter described vanadylic sulfate solution, by filtrate evaporative crystallization;
D, slough crystal water, obtain vanadylic sulfate powder;
E, vanadylic sulfate powder and sulfuric acid are mixed with vanadylic sulfate solution;
In specific embodiment provided by the invention, reductive agent all joins in reaction system with the ratio of weightmeasurement ratio (g/ml) 0.1% ~ 20%, but those skilled in the art completely can according to the reductibility of reductive agent, added in reaction soln with different weightmeasurement ratios, obtained vanadylic sulfate solution.
Prepare in vanadylic sulfate solution methods above-mentioned, the concentration of dilute sulphuric acid is 3.0-5.0M.When the final product that hope obtains is vanadylic sulfate powder, preferred sulfuric acid concentration is 3-4M, otherwise unnecessary acid not easily removes.When obtained vanadylic sulfate solution is directly as the V electrolyte used time, optimum sulfuric acid concentration is 3.5M.
Principal reaction equation is:
1.V2O5+H2SO4＝(VO2)2SO4+H2O
2. (VO2) 2SO4+H2O+2H+ (reductive agent)=2VOSO4+2H2O
The plant and instrument adopted: crystal growing furnace, pH value determinator, whizzer, LAND charge-discharge test instrument.
The raw material adopted: Vanadium Pentoxide in FLAKES, oxalic acid, the vitriol oil, training catechin, catechin, l-Epicatechol, afzelechin, Cyanidin, delphinidin, pelargonin, peonidin, high mallow element, scutellarin, baicalin, Quercetin, rutin, gallic acid, Protocatechuic Acid, gallic acid, vitamins C, ascorbic acid phosphoric acid esters are all purchased from business, purity is analytical pure, and in tea-polyphenol, the content of catechin is greater than 60%.
Embodiment 1:
With 1: the 3 dilution proportion vitriol oil, the sulphuric acid soln of preparation 300mL, when the heat that diluting concentrated sulfuric acid discharges adds 73gV2O5, after abundant stirring, add tea-polyphenol 10g, and be constantly stirred to V2O5 and dissolve completely, cooled and filtered, the blue vanadylic sulfate solution obtained, after tested: pH is 1.0-1.3, vanadium concentration is 2.7mol/L.Filtrate is placed on crystallization on crystal growing furnace (temperature control 80 DEG C) the sand-like crystalline powder of au bleu, is being cooled to room temperature, and with 200ml washing with acetone, after centrifugal, is obtaining vanadylic sulfate crystal, tetravalence content of vanadium 98.6%, yield 96%.
Carry out thing to the vanadylic sulfate powder obtained to detect mutually, draw vanadylic sulfate thing phasor.
The vanadylic sulfate crystal obtained is mixed with the solution of 1.8MVOSO4+3MH2SO4, as electrolyte for vanadium cell, injects positive and negative electrode retort respectively, carry out charge-discharge test.Current density is under 50mAcm-2 entirely fills and entirely puts test condition, and the charging/discharging voltage platform of test battery is steady, and electric discharge mean voltage is at about 1.25V, and loading capacity, close to theoretical discharge capacity, has good chemical property.
Claims (5)
1. prepare a method for vanadylic sulfate solution, it is characterized in that, comprising:
A, diluting concentrated sulfuric acid is become the dilute sulphuric acid of 3-5M, in described dilute sulphuric acid, add Vanadium Pentoxide in FLAKES, and fully stir;
B, add reductive agent, fully stir obtained described vanadylic sulfate solution;
C, filter described vanadylic sulfate solution, by filtrate evaporative crystallization;
D, slough crystal water, obtain vanadylic sulfate powder;
E, vanadylic sulfate powder and sulfuric acid are mixed with vanadylic sulfate solution;
Wherein, described reductive agent be selected from flavanols compounds, tree peony anthocyanins, flavonoid compound, flavonoid drugs, phenolic acid compound, vitamin substances any one or multiple.
2. method according to claim 1, is characterized in that, described flavanols compounds be selected from training catechin, catechin, l-Epicatechol, in afzelechin any one or multiple; Described tree peony anthocyanins be selected from Cyanidin, delphinidin, pelargonin, peonidin, high mallow element any one or multiple; Described flavonoid compound be selected from dried orange peel glycosides, Liquiritigenin any one or multiple; Described flavonols be selected from Quercetin, rutin any one or multiple; Described phenolic acid compound be selected from gallic acid, Protocatechuic Acid, P-hydroxybenzoic acid, vanillic acid, o-methoxybenzoic acid, forulic acid, phenylformic acid, Whitfield's ointment, gallic acid any one or multiple; Described vitamin substances is selected from vitamins C or derivatives thereof.
3. method according to claim 2, is characterized in that, described reductive agent is tea-polyphenol, and wherein, in described tea-polyphenol, the content of catechin is greater than 60%.
4. method according to claim 3, is characterized in that, described reductive agent is vitamins C.
5. the method according to any one of claim 1-4, is characterized in that, described reductive agent adds reaction system according to the ratio of weightmeasurement ratio 0.1%-20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410472915.2A CN104310475A (en) | 2014-09-16 | 2014-09-16 | Method for preparing vanadyl sulfate solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410472915.2A CN104310475A (en) | 2014-09-16 | 2014-09-16 | Method for preparing vanadyl sulfate solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104310475A true CN104310475A (en) | 2015-01-28 |
Family
ID=52365829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410472915.2A Pending CN104310475A (en) | 2014-09-16 | 2014-09-16 | Method for preparing vanadyl sulfate solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104310475A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117673426A (en) * | 2024-01-26 | 2024-03-08 | 液流储能科技有限公司 | Electrolyte preparation method for flow battery |
-
2014
- 2014-09-16 CN CN201410472915.2A patent/CN104310475A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117673426A (en) * | 2024-01-26 | 2024-03-08 | 液流储能科技有限公司 | Electrolyte preparation method for flow battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102198957A (en) | Method for preparing vanadyl sulfate for vanadium ion redox flow battery | |
| CN105061249B (en) | A kind of extracting method of theanine | |
| CN104310474A (en) | Method for preparing vanadyl sulfate solution | |
| CN106565973A (en) | Preparation method of mineral-based fulvic acid | |
| CN102515917B (en) | Method for preparing organic titanium-containing ammonium borate fertilizer with recrystallization technology | |
| CN104310475A (en) | Method for preparing vanadyl sulfate solution | |
| CN102657192B (en) | Biological bactericide chelerythrine suspending agent and preparation method thereof | |
| CN101445567B (en) | Method for extracting platycodon polysaccharides with pressurized hot water | |
| CN105153096A (en) | Method for extracting procyanidins (OPC) from grape seeds | |
| CN1687095A (en) | Technique for producing tannin by using Chinese gall | |
| CN102757373B (en) | Method for preparing high-purity lutein ester from marigold flower particles | |
| CN102617752A (en) | Production process of low molecular weight pectin | |
| CN115466137A (en) | Modified humic acid with low molecular weight and high functionality, and preparation and application thereof | |
| CN110938020B (en) | Preparation process of lauroyl arginine ethyl ester hydrochloride | |
| CN102887848A (en) | Method for preparing lutein crystals from marigold ointment by catalytic saponification | |
| CN107021821A (en) | Micro- fertilizer of a kind of antifreeze multielement slow-release of humic acid capsule structure nutrition and preparation method thereof | |
| CN107333809A (en) | A kind of plant growth promoter and its compound method | |
| CN102428962B (en) | Hybrid rice SXZ seed production conditioning agent and preparation method thereof | |
| CN102422842B (en) | SX rice yield promoter blended from growth hormone and rare earth and preparation method thereof | |
| CN106064975A (en) | Air-purifying nutrient solution for indoor greening plants | |
| CN102559943B (en) | Process method for separating glucose from ionic liquid | |
| CN105254606A (en) | Method for extracting procyanidins from purple corn | |
| CN109232563A (en) | A kind of preparation method of 5- bromo-7-azaindole | |
| CN103468632A (en) | Method for producing flavone from hovenia acerba suspension cells | |
| CN105304898B (en) | Battery cathode lead plaster containing modified lignin and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150128 |