CN101560678B - Method for preparing solution of indium tetrafluo - Google Patents
Method for preparing solution of indium tetrafluo Download PDFInfo
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- CN101560678B CN101560678B CN2009100621966A CN200910062196A CN101560678B CN 101560678 B CN101560678 B CN 101560678B CN 2009100621966 A CN2009100621966 A CN 2009100621966A CN 200910062196 A CN200910062196 A CN 200910062196A CN 101560678 B CN101560678 B CN 101560678B
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- indium
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- tetrafluo
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Abstract
The invention relates to a method for preparing a solution of indium tetrafluo. The method is characterized comprising the following steps that: 1) an anion exchange membrane is used for dividing an electrolytic cell into a cathode chamber and an anode chamber, wherein the electrolyte used in the anode chamber is a solution of fluoboric acid with the mass concentration of between 20 and 40 percent, and the electrolyte used in the cathode chamber is a solution of fluoboric acid with the mass concentration of between 10 and 50 percent; the anode in the anode chamber is made of an indium plate orindium flower, and the cathode in the cathode chamber is made of an indium plate or copper plate; and 2) the anode and the cathode are connected with a DC power supply for electrolysis, the electroly tic temperature is between 20 and 60 DEG C, and under the action of the DC with the voltage of 1.8 to 3V, the anode is subjected to anodic dissolution and enters the anode chamber; and when the concentration of indium ion in the anode chamber reaches between 200 and 250g/L, the electrolysis stops, and the solution of indium tetrafluo is obtained in the anode chamber. The method has the advantages of less equipment investment, simple process, no environmental pollution and high product purity; and the solution of indium tetrafluo, of which the content of indium ion is over 200g/L, can be directly prepared.
Description
Technical field
The invention belongs to and electroplate the specialty chemicals technical field, be specifically related to a kind of preparation method of the indium tetrafluo aqueous solution.
Background technology
Indium is that a kind of silvery white is rich in ductile metal, therefore has the surface of good wear resisting property.The used bearing shell of diesel engine of locomotive has more supporting capacity and fatigue strength, therefore must have good seizure resistance, allowing property of embedding, erosion resistance and ultimate compression strength.For satisfying this requirement, three layers of bearing shell of the most of use of bearing shell now; Surface at steel backing pot metal bearing shell plates lead, indium, tin etc. respectively.In present bearing shell electroplating technology, most of fluoroboric acid that uses is electroplated system.And yet there are no the preparation patent of indium tetrafluo at home.Because the overpotential of indium is very big, adds that decomposition reaction at high temperature takes place fluoroboric acid, be difficult to direct acid-soluble method production by indium metal.Adopt the oxide compound of indium or the acid pasting of carbonate, production cost height, waste indium metal.
Summary of the invention
The object of the present invention is to provide that a kind of cost is low, the preparation method of the solution of indium tetrafluo of non-environmental-pollution.
To achieve these goals, technical scheme of the present invention is: the preparation method of solution of indium tetrafluo, and adopt membrane electrolysis to prepare the indium tetrafluo aqueous solution, it is characterized in that it comprises the steps:
1) adopt anion-exchange membrane that electrolyzer is separated into cathode compartment and anolyte compartment, it is the fluoborate solution (fluoroboric acid accounts for 20-40g in the expression 100g fluoborate solution) of 20-40% that the electrolytic solution of anolyte compartment adopts mass concentration, and it is the fluoborate solution (fluoroboric acid accounts for 10-50g in the expression 100g fluoborate solution) of 10-50% that the electrolytic solution of cathode compartment adopts mass concentration; The anode that is arranged in the anolyte compartment adopts indium plate or the bigger indium flower of specific surface, and the negative electrode that is arranged in cathode compartment adopts indium plate or copper coin;
2) anode, negative electrode and direct supply are connected and carry out electrolysis, and electrolysis temperature is 20-60 ℃, under the direct current effect of 1.8-3V, and anode generation anode dissolution and enter the anolyte compartment; Carry out along with electrolytic, anodic indium metal constantly dissolving enters the anolyte compartment, and indium ion content constantly increases in the anolyte compartment, simultaneously, because the existence of anion-exchange membrane has stoped the separating out at negative electrode of the indium ion in the anolyte compartment, the negative electrode non-metallic ion exists, thereby evolving hydrogen reaction takes place; Its electrode reaction is as follows:
Anode:
In-3e＝In
3+
Negative electrode:
2H
++2e＝H
2↑；
When the indium ion concentration in the anolyte compartment reaches 200-250g/L, stop electrolysis, obtain solution of indium tetrafluo in the anolyte compartment.
Described anion-exchange membrane is a homogeneous-phase anion exchange film, its water ratio 40%-90% (quality), exchange capacity 〉=1.6mol/KG (doing), face resistance≤4.0 Ω .cm
2, transport number 〉=0.97.
The invention has the beneficial effects as follows: the equipment less investment, technology is simple, non-environmental-pollution, product purity height.Can direct production go out to contain the above solution of indium tetrafluo of indium ion 200g/L.
Embodiment
For a better understanding of the present invention, further illustrate content of the present invention, but content of the present invention not only is confined to the following examples below in conjunction with embodiment.
Embodiment 1:
The preparation method of solution of indium tetrafluo adopts membrane electrolysis to prepare the indium tetrafluo aqueous solution, and it comprises the steps:
1) adopt anion-exchange membrane that electrolyzer is separated into two utmost point chambers of negative and positive; The indium metal of getting 1Kg, mass content 99.99% is cast the positive plate of long 0.15m, wide 0.10m, place in the anolyte compartment, add 1L, mass concentration in the anolyte compartment and be 30% fluoborate solution (fluoroboric acid accounts for 30g in the expression 100g fluoborate solution) as electrolytic solution; The copper coin of getting long 0.15m, wide 0.10m places in the cathode compartment as negative plate, adds mass concentration in the cathode compartment and be 30% fluoborate solution (fluoroboric acid accounts for 30g in the expression 100g fluoborate solution) as electrolytic solution;
Described anion-exchange membrane is a homogeneous-phase anion exchange film, its water ratio 60% (quality), exchange capacity 〉=1.6mol/KG (doing), face resistance≤4.0 Ω .cm
2, transport number 〉=0.97;
2) anode, negative electrode and direct supply are connected and carry out electrolysis, and electrolysis temperature is 35 ℃, and the direct current electrolysis that passes to 2V is after 24 hours, and indium ion content reaches 205g/L in the anolyte compartment, stops electrolysis, obtains solution of indium tetrafluo in the anolyte compartment.The products obtained therefrom water white transparency.
Embodiment 2:
The preparation method of solution of indium tetrafluo adopts membrane electrolysis to prepare the indium tetrafluo aqueous solution, and it comprises the steps:
1) adopt anion-exchange membrane that electrolyzer is separated into cathode compartment and anolyte compartment, the electrolytic solution employing mass concentration of anolyte compartment is 20% fluoborate solution (fluoroboric acid accounts for 20g in the expression 100g fluoborate solution), and the electrolytic solution employing mass concentration of cathode compartment is 10% fluoborate solution (fluoroboric acid accounts for 10g in the expression 100g fluoborate solution); The anode that is arranged in the anolyte compartment adopts the indium plate, and the negative electrode that is arranged in cathode compartment adopts copper coin;
Described anion-exchange membrane is a homogeneous-phase anion exchange film, its water ratio 40% (quality), exchange capacity 〉=1.6mol/KG (doing), face resistance≤4.0 Ω .cm
2, transport number 〉=0.97;
2) anode, negative electrode and direct supply are connected and carry out electrolysis, and electrolysis temperature is 20 ℃, under the direct current effect of 1.8V, and anode generation anode dissolution and enter the anolyte compartment; When the indium ion concentration in the anolyte compartment reaches 200g/L, stop electrolysis, obtain solution of indium tetrafluo in the anolyte compartment.
Embodiment 3:
The preparation method of solution of indium tetrafluo adopts membrane electrolysis to prepare the indium tetrafluo aqueous solution, and it comprises the steps:
1) adopt anion-exchange membrane that electrolyzer is separated into cathode compartment and anolyte compartment, the electrolytic solution employing mass concentration of anolyte compartment is 40% fluoborate solution (fluoroboric acid accounts for 40g in the expression 100g fluoborate solution), and the electrolytic solution employing mass concentration of cathode compartment is 50% fluoborate solution (fluoroboric acid accounts for 50g in the expression 100g fluoborate solution); The anode that is arranged in the anolyte compartment adopts the indium flower, and the negative electrode that is arranged in cathode compartment adopts the indium plate;
Described anion-exchange membrane is a homogeneous-phase anion exchange film, its water ratio 90% (quality), exchange capacity 〉=1.6mol/KG (doing), face resistance≤4.0 Ω .cm
2, transport number 〉=0.97;
2) anode, negative electrode and direct supply are connected and carry out electrolysis, and electrolysis temperature is 60 ℃, under the direct current effect of 3V, and anode generation anode dissolution and enter the anolyte compartment; When the indium ion concentration in the anolyte compartment reaches 220g/L, stop electrolysis, obtain solution of indium tetrafluo in the anolyte compartment.
Claims (2)
1. the preparation method of solution of indium tetrafluo is characterized in that it comprises the steps:
1) adopt anion-exchange membrane that electrolyzer is separated into cathode compartment and anolyte compartment, it is the fluoborate solution of 20-40% that the electrolytic solution of anolyte compartment adopts mass concentration, and it is the fluoborate solution of 10-50% that the electrolytic solution of cathode compartment adopts mass concentration; The anode that is arranged in the anolyte compartment adopts indium plate or indium flower, and the negative electrode that is arranged in cathode compartment adopts indium plate or copper coin;
2) anode, negative electrode and direct supply are connected and carry out electrolysis, and electrolysis temperature is 20-60 ℃, under the direct current effect of 1.8-3V, and anode generation anode dissolution and enter the anolyte compartment; When the indium ion concentration in the anolyte compartment reaches 200-250g/L, stop electrolysis, obtain solution of indium tetrafluo in the anolyte compartment.
2. the preparation method of solution of indium tetrafluo according to claim 1, it is characterized in that: described anion-exchange membrane is a homogeneous-phase anion exchange film, its water ratio 40%-90%, exchange capacity 〉=1.6mol/KG, face resistance≤4.0 Ω/cm
2, transport number 〉=0.97.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100621966A CN101560678B (en) | 2009-05-25 | 2009-05-25 | Method for preparing solution of indium tetrafluo |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100621966A CN101560678B (en) | 2009-05-25 | 2009-05-25 | Method for preparing solution of indium tetrafluo |
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| Publication Number | Publication Date |
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| CN101560678A CN101560678A (en) | 2009-10-21 |
| CN101560678B true CN101560678B (en) | 2010-12-01 |
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| CN2009100621966A Expired - Fee Related CN101560678B (en) | 2009-05-25 | 2009-05-25 | Method for preparing solution of indium tetrafluo |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970245A (en) * | 2016-05-09 | 2016-09-28 | 上海应用技术学院 | Device for preparing boron trifluoride gas |
-
2009
- 2009-05-25 CN CN2009100621966A patent/CN101560678B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970245A (en) * | 2016-05-09 | 2016-09-28 | 上海应用技术学院 | Device for preparing boron trifluoride gas |
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| CN101560678A (en) | 2009-10-21 |
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Granted publication date: 20101201 Termination date: 20160525 |