CN107142490A - A kind of method that magnesium chloride electricity is converted into high-purity magnesium oxide - Google Patents
A kind of method that magnesium chloride electricity is converted into high-purity magnesium oxide Download PDFInfo
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- CN107142490A CN107142490A CN201710324299.XA CN201710324299A CN107142490A CN 107142490 A CN107142490 A CN 107142490A CN 201710324299 A CN201710324299 A CN 201710324299A CN 107142490 A CN107142490 A CN 107142490A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/18—Alkaline earth metal compounds or magnesium compounds
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
- C01F5/06—Magnesia by thermal decomposition of magnesium compounds
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- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
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- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/24—Halogens or compounds thereof
- C25B1/26—Chlorine; Compounds thereof
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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- C01P2006/80—Compositional purity
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Abstract
The invention belongs to electrolysis tech field, and in particular to a kind of method that magnesium chloride electricity is converted into high-purity magnesium oxide.Purpose is using extensive chlorination magnesium resource short route, obtains to low power consuming high-purity magnesium oxide product.By cationic membrane electrolytic tank electrolysis magnesium chloride solution, CO is passed through to cathodic region2Gas, directly generates magnesium carbonate with the reaction of cathodic region electrolyte, is stirred while electrolysis；Cathodic region electrolyte and magnesium carbonate directed flow carry out separation of solid and liquid by filter, and filtrate cycle returns to cathodic region；Dry filtration product and obtain magnesium carbonate or basic magnesium carbonate, high-purity magnesium oxide product is obtained through calcining, while CO2Gas circulation is used；Anode and cathode gas are collected, byproduct hydrogen and chlorine is obtained.The present invention makes magnesium chloride be converted into magnesium carbonate or basic magnesium carbonate using the method for electrolysis, and electrolysis process automaticity is high, and products obtained therefrom purity is high, is conducive to mass producing, improves production efficiency.
Description
Technical field
The invention belongs to electrolysis tech field, and in particular to a kind of method that magnesium chloride electricity is converted into high-purity magnesium oxide.
Background technology
Magnesia is a kind of white powder, odorless, tasteless, water insoluble and ethanol, 2852 DEG C of fusing point, 3600 DEG C of boiling point, warp
1000 DEG C of high temperature above calcinations can be changed into crystal, rise to more than 1500 DEG C then into dead roasting magnesia or sintered magnesia.It is high-purity
Magnesia generally refers to the product that content of magnesia is more than 98%.High-purity magnesium oxide has excellent resistance to acids and bases and electric insulation
Property, good photopermeability, high-termal conductivity, larger thermal coefficient of expansion is widely used as high-temperature heat-resistance material.In addition in electricity
All it is widely used in the fields such as son, electrical equipment, optics, instrument, metallurgy, national defence and Aero-Space.The purposes and valency of magnesia
Value is closely related with its purity.
The total output of magnesia is more than 10,000,000 tons in the world, wherein 27% is to be produced using seawater, bittern as raw material,
10% comes from micro-crystalline precipitate magnesite, and 63% is made by crystallization magnesite.And be raw material in western countries' seawater and bittern
Ratio to be up to 60%.China's salt lake resources are enriched, in the production process of potassium chloride, often produce 1 ton of potassium chloride, will be secondary
Produce 8~10 tons of magnesium chlorides.
Having mass produced the method for high-purity magnesium oxide at present has pyrohydrolytic method, Sulmag methods, vapor phase method, spraying boiling
Method etc..
Pyrohydrolytic method is the magnesium chloride solution spraying after bischofite is dissolved, and a part is first sloughed through 500 DEG C of calcinings
The crystallization water generates MgOMgCl2·H2O, is then converted to basic magnesium chloride (Mg (OH) Cl), when temperature is further increased to over
510 DEG C, Mg (OH) Cl continues to be decomposed into MgO.This method technique is simple, production magnesia purity is higher, but course of reaction
The high temperature HCl gases of middle generation have very strong corrosivity, and, energy consumption high to equipment requirement is big.
Sulmag methods can produce the high pure magnesium chloride that purity is more than 99.5%, and flow is：The magnesite of calcining is through chemistry
After leaching, calcium chloride solution is added, and be passed through CO2, the suspension that generation magnesium chloride solution and calcium carbonate, water-insoluble are constituted.
CO is passed through in isolated clean magnesium chloride solution2And NH3Afterwards, then by a series of processing magnesia is obtained.The cost of this method
It is too high.
The highly-purity magnesite content of MgO of vapor phase method manufacture can reach 99.95%, and the method is using magnesium metal as raw material, in gas phase
React, the good product dispersibility produced, epigranular, can sinter at low temperature with oxygen under state.But magnesium metal cost compared with
Height, gas phase reaction temperature is higher, requirement to equipment is also high, therefore this method cost performance is not high.
Boiling process spray to solve magnesium chloride hexahydrate dehydration condensation problem, the method that steam dissolves bischofite is employed,
The solution of high concentration is put into fluidized bed furnace in high-pressure fog mode, such a device to spray and boiling process is combined is now
More suitable dehydration pyrolysis installation.What the technique was obtained contains undecomposed CaCl2, NaCl and KCl product magnesia, then
By purifying water washing, again separated and dissolved, the MgO/Mg (OH) of product after treatment2Filter cake.Pass through about 1000 DEG C again
It is light-burned, become active magnesia, use hot-forming to be spherical, the temperature of material hot pressing up to 250 DEG C, input 1900~
2000 DEG C of high temperature vertical kilns, carry out dead roasting.Above-mentioned technique can obtain content of MgO more than 99% magnesia.But huge energy consumption, work
Skill is complicated, long flow path.
At present, magnesia is produced using seawater, bittern as raw material, the main method that the country is used has lime (or calcined dolomite in powder)
Method, ammonia process (or ammonium carbonate method) and caustic soda (or soda ash) method.Wherein ammonia process (or ammonium carbonate method) can produce high-purity magnesium oxide product, but
Operating environment is poor, and ammonia recovering process energy consumption is higher, and the cost of production is high.Caustic soda or Method of Soda production magnesia, product quality height,
But cost is also very high.Milk of lime (calcined dolomite in powder) method production high-purity magnesium oxide is sufficient, and the requirement to equipment is than relatively low, by-product
The recovery process of thing calcium chloride is ripe, the huge market demand, but existing process is on the one hand higher to active lime quality requirement,
Another aspect magnesium hydroxide slurry is difficult to separate and washed, and causes CaO, SiO in product2, Fe equal sizes it is higher, magnesia it is pure
Degree is extremely difficult to 98%.
The content of the invention
For problems such as long flow path present in prior art, high energy consumption and cost height, the invention provides a kind of chlorine
Change the method that magnesium electricity is converted into high-purity magnesium oxide, it is therefore an objective to using extensive chlorination magnesium resource short route, obtain height to low power consuming
Pure zirconia magnesium products.By cationic membrane electrolytic tank electrolysis magnesium chloride solution, CO is passed through to cathodic region2Gas, with cathodic region electricity
Solution liquid reaction directly generates magnesium carbonate, is stirred while electrolysis；Cathodic region electrolyte and magnesium carbonate directed flow pass through mistake
Filter device and carry out separation of solid and liquid, filtrate cycle returns to cathodic region；Dry filtration product and obtain magnesium carbonate or basic magnesium carbonate, through forging
Burning obtains high-purity magnesium oxide product, while CO2Gas circulation is used；Collect anode and cathode gas, obtain byproduct hydrogen and
Chlorine.
Realize the technical scheme of the object of the invention, the method that a kind of magnesium chloride electricity of the invention is converted into high-purity magnesium oxide,
Follow the steps below：
Step 1：Magnesium chloride brine is electrolysed, the technological parameter of electrolysis is：100 DEG C of 10 DEG C≤temperature ＜, electrolysis
Voltage >=2.2V；
Described electrolysis is carried out in electrolysis system, and electrolysis system includes cationic membrane electrolytic cell, feeder and filtering
Recycle device；
Described cationic membrane electrolytic cell includes：Cell body 14, cathode chamber 3, anode chamber 4, cation-exchange membrane 5, agitator
6th, dc source 7；
Described feeder includes carbon dioxide air accumulator 1 and gas flowmeter 2；
Described be recovered by filtration includes filter 8, drying box 9, the first dissolving tank 10, the first pump 11, the using device
Two dissolving tanks 12 and the second pump 13；Described electrolysis system has the function of stirring, ventilation, filtering and drying；
Wherein, cell body 14 is internally provided with cation-exchange membrane 5, and 14 points by cell body of cation-exchange membrane 5 is two Room, its
In, be connected with the positive pole of dc source 7 for anode chamber 4, be connected with the negative pole of dc source 7 for cathode chamber 3, in cathode chamber
Agitator 6 is provided with 3, described agitator 6 is stirred by electrode drive；
Filter 8 is provided with the lower section of cathode chamber 3, filter 8 is provided with solid outlet and liquid outlet, filtered
The solid outlet of machine is connected with drying box 9, and the liquid outlet of filter is connected with the second dissolving tank 12, the second dissolving tank 12
Communicated by the second pump 13 with cathode chamber 3；
Opening is set to be connected with the first dissolving tank 10 in the downside of anode chamber 4, the first dissolving tank 10 passes through the first pump 11
Communicated with anode chamber 4；
The bottom of cell body 14 is provided with carbon dioxide air accumulator 1, and carbon dioxide air accumulator 1 is connected with gas flowmeter 2.
In described step 1, the mass concentration of described water lithium chloride solution is arbitrary value；
Step 2：The electrolyte of cathode chamber 3 is passed through high-purity carbon dioxide gas in ion-exchange membrane electrolyzer on the sunny side, makes cationic membrane
Carbonic acid magnesium precipitate is directly generated in electric tank cathode room 3；
In described step 2, high-purity carbon dioxide gas is passed through by the bottom air vent of electric tank cathode room 3.
Step 3：The cathode chamber 3 of cationic membrane electrolytic cell is stirred, the electrolyte of cathode chamber 3 and magnesium carbonate or alkali formula carbon
Sour magnesium directed flow, runs through filter 8 and is filtered, realize quick separation of solid and liquid, obtains magnesium carbonate or alkali formula carbon
Sour magnesium and filtrate, filtrate cycle are back to cathode chamber 3 as the electrolyte of cathode chamber 3；The solution of anode chamber 4 is continuously extracted out, adjusted
Anode chamber 4 is returned to after concentration；Collect anodic gas and obtain byproduct chlorine, collect cathode gas and obtain byproduct hydrogen；
In described step 3, described stirring is mechanical agitation or the coupled stir of machinery and gas, the work of the stirring
Be suppress the bottom precipitation of cell body 14 and promote bubble disperse；
In described step 3, described directed flow is continuous flowing, make magnesium carbonate or basic carbonate magnesium precipitate it is quick from
Electrolytic cell is opened, separation of solid and liquid is realized, to avoid the anti-molten of precipitation.
In described step 3, described filtrate adds water to original content Posterior circle and is back to cathode chamber 3, is used as the electricity of cathode chamber 3
Liquid is solved, the electrolyte of anode chamber 4 is added after extracting out after magnesium chloride adjustment concentration to initial reaction density of magnesium chloride, is back to anode chamber
4, realize recycling for magnesium chloride.
Step 4：Magnesium carbonate or basic magnesium carbonate are dried, carbon dioxide and magnesium oxide product, two are obtained through calcining
Carbonoxide returns to electrolytic process, purity >=99% of magnesium oxide product.
The key reaction that the method that a kind of magnesium chloride electricity of the present invention is converted into high-purity magnesium oxide is related to is as follows：
Anode reaction：2Cl-- 2e=Cl2 (1)
Cathode reaction：2H2O+2e=H2+2OH- (2)
Overall reaction：MgCl2+H2O+CO2=MgCO3↓+H2↑+Cl2↑ (3)
Or 2MgCl2+3H2O+CO2=Mg2(OH)2CO3↓+2H2↑+2Cl2↑
Calcination reaction：MgCO3=MgO+CO2↑
Mg2(OH)2CO3=2MgO+CO2↑+H2O↑
Check in, at 25 DEG C, standard generation potential V1=-1.3583V, V2=-0.8277V, then EAlways=-2.186V, so,
Tank voltage necessarily be greater than 2.186V.
Compared with prior art, advantage of the invention is that：
(1) present invention makes magnesium chloride be converted into magnesium carbonate or basic magnesium carbonate, electrolysis process using the method for electrolysis
Automaticity is high, and products obtained therefrom purity is high, is conducive to mass producing, improves production efficiency；
(2) high-purity magnesium oxide, required calcining heat is made in the magnesium carbonate or basic magnesium carbonate calcining that present invention electrolysis is obtained
Less than the temperature of calcining magnesium hydroxide, be conducive to saving the energy, reduce production cost；
(3) the obtained lithium carbonate product of present invention electrolysis can quickly realize separation of solid and liquid, it is to avoid lithium carbonate it is anti-molten；
(4) carbon dioxide that method of the invention calcining is obtained can return to electrolytic process, realize carbon dioxide
Recycle, it is possible to increase resource utilization, energy-saving and emission-reduction reduce cost.
Brief description of the drawings
Fig. 1 is the structural representation of electrolysis system of the present invention；
1- carbon dioxide air accumulators；2- gas flowmeters；3- cathode chambers；4- anode chambers；5- cation-exchange membranes；6- is stirred
Device；7- dc sources；8- filters；9- drying boxes；The dissolving tanks of 10- first；The pumps of 11- first；The dissolving tanks of 12- second；13-
Two pumps；14- cell bodies.
Embodiment
The magnesium chloride solution used in the embodiment of the present invention puies forward the bischofite aqueous solution after potassium or seawater salt extraction for salt lake
Accessory substance afterwards, the filtrate obtained through filter and remove suspended substances and silt etc..
The electrolysis system that following examples are used is the device of description of the invention accompanying drawing 1, and the electrolysis system includes positive
Ion-exchange membrane electrolyzer, feeder and it is recovered by filtration and utilizes device；
Described cationic membrane electrolytic cell includes：Cell body 14, cathode chamber 3, anode chamber 4, cation-exchange membrane 5, agitator
6th, dc source 7；
Described feeder includes carbon dioxide air accumulator 1 and gas flowmeter 2；
Described be recovered by filtration includes filter 8, drying box 9, the first dissolving tank 10, the first pump 11, the using device
Two dissolving tanks 12 and the second pump 13；Described electrolysis system has the function of stirring, ventilation, filtering and drying；
Wherein, cell body 14 is internally provided with cation-exchange membrane 5, and 14 points by cell body of cation-exchange membrane 5 is two Room, its
In, be connected with the positive pole of dc source 7 for anode chamber 4, be connected with the negative pole of dc source 7 for cathode chamber 3, in cathode chamber
Agitator 6 is provided with 3, described agitator 6 is stirred by electrode drive；
Filter 8 is provided with the lower section of cathode chamber 3, filter 8 is provided with solid outlet and liquid outlet, filtered
The solid outlet of machine is connected with drying box 9, and the liquid outlet of filter is connected with the second dissolving tank 12, the second dissolving tank 12
Communicated by the second pump 13 with cathode chamber 3；
Opening is set to be connected with the first dissolving tank 10 in the downside of anode chamber 4, the first dissolving tank 10 passes through the first pump 11
Communicated with anode chamber 4；
The bottom of cell body 14 is provided with carbon dioxide air accumulator 1, and carbon dioxide air accumulator 1 is connected with gas flowmeter 2.
Embodiment 1
The method that the present embodiment is converted into high-purity magnesium oxide by magnesium chloride electricity, is carried out according to the following steps：
Step 1：Magnesium chloride brine is electrolysed, the technological parameter of electrolysis is：Temperature is 20 DEG C, and the voltage of electrolysis is
3V；
In described step 1, the mass concentration of described magnesium chloride brine is 50g/L；
Step 2：The electrolyte of cathode chamber 3 is passed through high-purity carbon dioxide gas in ion-exchange membrane electrolyzer on the sunny side, and flow is 20m3/
H, makes to directly generate carbonic acid magnesium precipitate in cationic membrane electric tank cathode room 3；
In described step 2, high-purity carbon dioxide gas is passed through by the bottom air vent of electric tank cathode room 3.
Step 3：The cathode chamber 3 of cationic membrane electrolytic cell is stirred, the electrolyte of cathode chamber 3 and magnesium carbonate or alkali formula carbon
Sour magnesium directed flow, runs through filter 8 and is filtered, realize quick separation of solid and liquid, obtains magnesium carbonate or alkali formula carbon
Sour magnesium and filtrate, filtrate cycle are back to cathode chamber 3 as the electrolyte of cathode chamber 3；The solution of anode chamber 4 is continuously extracted out, adjusted
Anode chamber 4 is returned to after concentration；Collect anodic gas and obtain byproduct chlorine, collect cathode gas and obtain byproduct hydrogen；
In described step 3, described stirring is mechanical agitation, and the effect of the stirring is that suppressing the bottom of cell body 14 sinks
Form sediment and promote bubble to disperse；
In described step 3, described directed flow is continuous flowing, make magnesium carbonate or basic carbonate magnesium precipitate it is quick from
Electrolytic cell is opened, separation of solid and liquid is realized, to avoid the anti-molten of precipitation.
In described step 3, described filtrate adds water to 50g/L Posterior circles and is back to cathode chamber 3, is used as the electricity of cathode chamber 3
Liquid is solved, the electrolyte of anode chamber 4 is added after extracting out after magnesium chloride adjustment concentration to initial reaction density of magnesium chloride, is back to anode chamber
4, realize recycling for magnesium chloride.
Step 4：Magnesium carbonate or basic magnesium carbonate are dried, carbon dioxide and magnesium oxide product are obtained through calcining.
Embodiment 2
The method that the present embodiment is converted into high-purity magnesium oxide by magnesium chloride electricity, is carried out according to the following steps：
Step 1：Magnesium chloride brine is electrolysed, the technological parameter of electrolysis is：Temperature is 90 DEG C, and the voltage of electrolysis is
20V；
In described step 1, the mass concentration of described magnesium chloride brine is 500g/L；
Step 2：The electrolyte of cathode chamber 3 is passed through high-purity carbon dioxide gas in ion-exchange membrane electrolyzer on the sunny side, and flow is 90m3/
H, makes to directly generate carbonic acid magnesium precipitate in cationic membrane electric tank cathode room 3；
In described step 2, high-purity carbon dioxide gas is passed through by the bottom air vent of electric tank cathode room 3.
Step 3：The cathode chamber 3 of cationic membrane electrolytic cell is stirred, the electrolyte of cathode chamber 3 and magnesium carbonate or alkali formula carbon
Sour magnesium directed flow, runs through filter 8 and is filtered, realize quick separation of solid and liquid, obtains magnesium carbonate or alkali formula carbon
Sour magnesium and filtrate, filtrate cycle are back to cathode chamber 3 as the electrolyte of cathode chamber 3；The solution of anode chamber 4 is continuously extracted out, adjusted
Anode chamber 4 is returned to after concentration；Collect anodic gas and obtain byproduct chlorine, collect cathode gas and obtain byproduct hydrogen；
In described step 3, described stirring is mechanical agitation, and the effect of the stirring is that suppressing the bottom of cell body 14 sinks
Form sediment and promote bubble to disperse；
In described step 3, described directed flow is continuous flowing, make magnesium carbonate or basic carbonate magnesium precipitate it is quick from
Electrolytic cell is opened, separation of solid and liquid is realized, to avoid the anti-molten of precipitation.
In described step 3, described filtrate adds water to 500g/L and is recycled back to cathode chamber 3, is electrolysed as cathode chamber 3
Liquid, the electrolyte of anode chamber 4 is added after extracting out after magnesium chloride adjustment concentration to initial reaction density of magnesium chloride, is back to anode chamber 4,
Realize recycling for magnesium chloride.
Step 4：Magnesium carbonate or basic magnesium carbonate are dried, carbon dioxide and magnesium oxide product are obtained through calcining.
Claims (6)
1. a kind of method that magnesium chloride electricity is converted into high-purity magnesium oxide, it is characterised in that step includes：
Step 1：Magnesium chloride brine is electrolysed, the technological parameter of electrolysis is：100 DEG C of 10 DEG C≤temperature ＜, the electricity of electrolysis
Pressure >=2.2V；
Described electrolysis is carried out in electrolysis system, and electrolysis system includes cationic membrane electrolytic cell, feeder and is recovered by filtration
Utilize device；Described cationic membrane electrolytic cell includes：Cell body, cathode chamber, anode chamber, cation-exchange membrane, agitator, direct current
Power supply；Described feeder includes carbon dioxide air accumulator and gas flowmeter；Described being recovered by filtration is included using device
Filter, drying box, the first dissolving tank, the first pump, the second dissolving tank and the second pump；Described electrolysis system have stirring,
The function of ventilation, filtering and drying；Wherein, cell body is internally provided with cation-exchange membrane, and cell body is divided into by cation-exchange membrane
Two Room, wherein, be connected with the positive pole of dc source for anode chamber, be connected with the negative pole of dc source for cathode chamber, in the moon
Agitator is provided with pole room, described agitator is stirred by electrode drive；Filtering is provided with below cathode chamber
Device, filter is provided with solid outlet and liquid outlet, and the solid outlet of filter is connected with drying box, filter
Liquid outlet is connected with the second dissolving tank, and the second dissolving tank is communicated by the second pump with cathode chamber；Set on the downside of anode chamber
Put opening with the first dissolving tank to be connected, the first dissolving tank is communicated by the first pump with anode chamber；Cell body bottom is provided with dioxy
Change carbon air accumulator, carbon dioxide air accumulator is connected with gas flowmeter；
Step 2：Cathode chamber electrolyte is passed through high-purity carbon dioxide gas in ion-exchange membrane electrolyzer on the sunny side, makes cationic membrane electrolytic cell
Carbonic acid magnesium precipitate is directly generated in cathode chamber；
Step 3：The cathode chamber of cationic membrane electrolytic cell is stirred, cathode chamber electrolyte and magnesium carbonate or basic magnesium carbonate are determined
To flowing, run through filter and filtered, realize quick separation of solid and liquid, obtain magnesium carbonate or basic magnesium carbonate and filter
Liquid, filtrate cycle is back to cathode chamber as cathode chamber electrolyte；Anode chamber's solution is continuously extracted out, and sun is returned after adjusted concentration
Pole room；Collect anodic gas and obtain byproduct chlorine, collect cathode gas and obtain byproduct hydrogen；
Step 4：Magnesium carbonate or basic magnesium carbonate are dried, carbon dioxide and magnesium oxide product are obtained through calcining.
2. the method that a kind of magnesium chloride electricity according to claim 1 is converted into high-purity magnesium oxide, it is characterised in that step 1
In, the mass concentration of described water lithium chloride solution is arbitrary value.
3. the method that a kind of magnesium chloride electricity according to claim 1 is converted into high-purity magnesium oxide, it is characterised in that step 2
In, high-purity carbon dioxide gas is passed through by electric tank cathode room bottom air vent.
4. the method that a kind of magnesium chloride electricity according to claim 1 is converted into high-purity magnesium oxide, it is characterised in that step 3
In, described stirring is mechanical agitation or the coupled stir of machinery and gas, and the effect of the stirring is to suppress the bottom of cell body 14
Precipitate and promote bubble to disperse in portion.
5. the method that a kind of magnesium chloride electricity according to claim 1 is converted into high-purity magnesium oxide, it is characterised in that step 3
In, described directed flow is continuous flowing, magnesium carbonate or basic carbonate magnesium precipitate is quickly left electrolytic cell, realizes solid-liquid point
From to avoid the anti-molten of precipitation.
6. the method that a kind of magnesium chloride electricity according to claim 1 is converted into high-purity magnesium oxide, it is characterised in that step 3
In, described filtrate adds water to original content Posterior circle and is back to cathode chamber, and as cathode chamber electrolyte, anode chamber's electrolyte is extracted out
Add afterwards after magnesium chloride adjustment concentration to initial reaction density of magnesium chloride, be back to anode chamber, realize recycling for magnesium chloride.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111592024A (en) * | 2020-04-24 | 2020-08-28 | 广西科学院 | Method for preparing submicron solid spherical calcium carbonate from calcium chloride |
| CN111717928A (en) * | 2020-04-24 | 2020-09-29 | 广西科学院 | Method for preparing nano calcium carbonate by in-situ electrochemical precipitation technology |
| CN111962093A (en) * | 2020-07-06 | 2020-11-20 | 中船重工（邯郸）派瑞特种气体有限公司 | Electrolytic fluorine production stirring device and method |
| CN113106498A (en) * | 2021-04-09 | 2021-07-13 | 河北大有镁业有限责任公司 | Device and method for continuously producing magnesium metal |
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| CN111592024A (en) * | 2020-04-24 | 2020-08-28 | 广西科学院 | Method for preparing submicron solid spherical calcium carbonate from calcium chloride |
| CN111717928A (en) * | 2020-04-24 | 2020-09-29 | 广西科学院 | Method for preparing nano calcium carbonate by in-situ electrochemical precipitation technology |
| CN111592024B (en) * | 2020-04-24 | 2022-09-06 | 广西科学院 | Method for preparing submicron solid spherical calcium carbonate from calcium chloride |
| CN111962093A (en) * | 2020-07-06 | 2020-11-20 | 中船重工（邯郸）派瑞特种气体有限公司 | Electrolytic fluorine production stirring device and method |
| CN113106498A (en) * | 2021-04-09 | 2021-07-13 | 河北大有镁业有限责任公司 | Device and method for continuously producing magnesium metal |
| CN113106498B (en) * | 2021-04-09 | 2022-05-27 | 河北大有镁业有限责任公司 | Device and method for continuously producing magnesium metal |
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