CN209612655U - A kind of bipolar membrane device producing hypophosphorous acid - Google Patents
A kind of bipolar membrane device producing hypophosphorous acid Download PDFInfo
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- CN209612655U CN209612655U CN201822221960.7U CN201822221960U CN209612655U CN 209612655 U CN209612655 U CN 209612655U CN 201822221960 U CN201822221960 U CN 201822221960U CN 209612655 U CN209612655 U CN 209612655U
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Abstract
The utility model discloses the production equipments of fine chemicals, and in particular to a kind of bipolar membrane device for producing hypophosphorous acid.The utility model includes membrane stack, wherein being successively made of anode membrane, the sour cavity block of resistance, Bipolar Membrane in each membrane stack, forms three compartments；Anode membrane hinders and is respectively formed sodium dihydrogen phosphate room, acid compartment, alkaline chamber between sour cavity block, Bipolar Membrane；It is placed with Bipolar Membrane between cathode electrode and membrane stack, then is sequentially placed membrane stack, outermost Bipolar Membrane is corresponding with anode electrode again in membrane stack places；Sodium dihydric hypophosphite solution room is connected by circulation with salt box；Acid compartment is connected by circulation with sour case, and has the external discharge acid solution of a branch line；Alkaline chamber is connected by circulation with lye pole liquid cab signal box, and has the external discharge lye of a branch line.The utility model has the advantages that acid or alkali can be continuously discharged, the dedicated Bipolar Membrane for hindering sour cavity block and reducing resistance of resistance to sodium hypophosphite reproducibility is developed；It uses sodium hydroxide for pole liquid, saves pole liquid case.
Description
Technical field
The utility model belongs to fine chemicals production field, is related to a kind of bipolar membrane device for preparing hypophosphorous acid, especially
Being related to a kind of Sodium Hypophosphite is raw material, using the device of bipolar film preparation hypophosphorous acid.
Background technique
Hypophosphorous acid is a kind of fine chemical product that purposes is very extensive, mainly as reducing agent for chemical plating, plating
And organic synthesis industry, also act as catalyst, the reduction (de- diazo) of diazonium salt, the more nitre of Reductive elimination of esterification
The production of halogen, refrigerant and high-purity sodium hypophosphite on based compound aromatic ring.The preparation method of hypophosphorous acid mainly has chemistry
Method, ion-exchange and electroosmose process.Chemical method generally uses yellow phosphorus to react with barium hydroxide, and sulfuric acid removal is added after reaction
Barium, but hypophosphorous acid concentration made from chemical method is not high, is not able to satisfy the requirement of practical application, needs further to be refined.
Ion-exchange Sodium Hypophosphite is raw material, removes sodium using cation exchange resin, but the method amount of resin is big, and need frequency
Numerous regeneration, not only operating procedure complexity can also generate a large amount of high-salt wastewater, cause to seriously affect to environment.Electroosmose process is with secondary
Sodium phosphate is raw material, is separated cathode chamber and anode chamber using anion-exchange membrane and cation-exchange membrane, lead to direct current after
Anode generates oxygen and hypophosphorous acid, generates hydrogen and sodium hydroxide in cathode, the technique during producing hypophosphorous acid without waste water,
Waste residue generates, and still, the water in electrodialytic process on electrode plate can generate oxygen and hydrogen by electrolysis, consumes a large amount of electricity
Can, cause entire process energy consumption higher, electric current conversion ratio is low.
CN 1341779 discloses a kind of method of method for preparing hypophosphorous acid by using electrolytic, and electrodialysis cell is six Room electrodialysis cells, is
The nascent oxygen for preventing anode electrolysis from generating aoxidizes hypophosphite ion, is adding an anode membrane at neighbouring anode, by anode
Room and product chambers separate.Between feed chamber and cathode plus two anode membranes constitute surge chamber, prevent hydroxide ion from entering original
Expect room.Add two cavity blocks to constitute surge chamber in feed chamber and product chambers, prevents hydrogen ion from entering feed chamber and preventing sodium ion
Product chambers are entered, method for preparing hypophosphorous acid by using electrolytic is improved.But since the technique still can not in electrodialytic process
It avoids the water on electrode plate from generating oxygen and hydrogen by electrolysis, consumes a large amount of electric energy, cause entire process energy consumption higher, electric current
Conversion ratio is low.
103318862 A of CN discloses the technique that a kind of five Room electroosmose process prepare hypophosphorous acid, with hypophosphites and inorganic
Acid is raw material, carries out ion exchange using the effect of five Room electrodialysis cell electric fields.Five Room electrodialysis cells are by seven films to constituting
Electrodialysis cell, electric dialyzator is formed with multiple partitions, anion and cation exchange membrane and electrode assembling, with traditional four Room, six Room
Membrane electrolyser is compared, and five Room electroosmose process only move the ion in solution with electric field during electrodialysis is run come gan,
And water not undergoing phase transition, the energy consumption in production process can be reduced.But the method is needed using two kinds of originals of hypophosphites and inorganic acid
Material can also generate inorganic salts byproduct, and the electrodialysis dress of the film pair of five Room seven other than obtaining hypophosphorous acid product after electrolysis
Setting every seven films in assembling process, to a pair of electrodes is just needed, industrialization zoom comparison is difficult.
Patent CN201610217703 discloses a kind of technique that hypophosphorous acid is prepared using bipolar membrane electrodialysis method, the technique
Producing hypophosphorous acid, only Sodium Hypophosphite and deionized water are raw material in the process, without adding acid or other raw materials offer H+, can also
By-product alkali, and water electrolysis will not be made to go out gas, required low energy consumption, and simple production process, process conditions are mild, without secondary pollution.
In addition, there can be multiple groups combo unit to repeat the membrane stack that assembling is formed between a pair of electrodes, industrialization amplification is relatively easily carried out.
But the patent (CN201610217703) is substantially " water treatment technology " published by July, 2013
(Vol.39No.7P81) method of article " the industrial applications research of BPM2 type bipolar membrane device sodium sulphate alkaline " carries out detailed
Change description, and sodium sulphate therein is only changed into sodium hypophosphite.Its disadvantage has three:
1, intermittent transformation approach use or lab process, by theoretical value, concentration arrives sour to discharge after a certain value
Or alkali, it adds water or expects.The disadvantage is that acid base concentration be difficult to accomplish it is online rapidly, accurate detection, can not be discharged stablize it is dense
The acid or alkali of degree；
2, the patent makes inferences simultaneously detailed or description fully according to the process of sodium sulphate Acid-And Base-making By Bipolar Membrane, does not consider
The middle strong reducing property of hypophosphorous acid, and should be using the Bipolar Membrane of the resistance sour cavity block and reducing resistance of dedicated reducing resistance；
What 3, do not consider to use solution as pole liquid during Bipolar Membrane, because selecting different pole liquid can be to preparing yet
The purity of the acid or alkali that come generates great influence, especially industrialized production, and product purity is one of success or failure key.If choosing
It is pole liquid with sodium sulphate, although its sulfate radical can be diffused into hypophosphorous acid to the of less demanding of electrode, causes product purity not
It is qualified；If using hypophosphorous acid for pole liquid, although not influencing the purity of product, oxidation reaction can occur in anode, it can be very big
Destruction hypophosphorous acid；If using sodium hydroxide for pole liquid, although nor affecting on the purity of product, spy can be proposed to positive electrode
Different requirement, ordinary electrode are intolerant to sodium hydroxide.
Patent CN 201810347574.4 has disclosed a kind of bipolar membrane electrodialysis side that hypophosphorous acid is prepared by sodium hypophosphite
Method, the method are as follows: (1) configuration quality score is the sodium hypophosphite aqueous solution of 10wt%~30wt%；(2) by sodium hypophosphite
Aqueous solution is added in material liquid tank, 3wt% metabisulfite solution is added into pole flow container, and be added in equal volume in alkali tank and sour tank
Pure water；(3) open bipolar membrane electrodialysis device, control voltage 10V~25V, control each every indoor reaction temperature be 20
DEG C~40 DEG C, carry out electrodialysis；When no longer being increased by hydrionic content in standard solution of sodium hydroxide Titrable acid room, it is considered as
Reaction end；(4) it takes the hypophosphorous acid solution in sour tank to carry out condensing crystallizing and obtains hypophosphorous acid crystal.And propose pair of wherein membrane stack
Pole film is FBM type Bipolar Membrane (Fuma-Tech Co, Germany), and anion-exchange membrane is AHA type anion-exchange membrane (ASTOM
Co, Japan), cation-exchange membrane is CMB type cation-exchange membrane (ASTOM Co, Japan).
Model of the patent CN 201810347574.4 in addition to defining Bipolar Membrane, anode membrane, cavity block, although FBM type Bipolar Membrane
Performance with preferable common inorganic salt relieving haperacidity alkali, but do not have the property of preferable reducing resistance；AHA type anion exchange
It, can be poor to reducing resistance though film is the resistance acid cavity block of preferable performance.Using the film of this two kinds of models, in actual production simultaneously
It is unable to stable operation.Patent CN 201810347574.4 in addition to these shortcomings, also experimentation, between using
Formula of having a rest preparation, and improper formal production, have lacked the technique and control method of Bian Xuhua, automation.
We are repaired according to above situation for the shortcomings that 201810347574.4 patent of CN201610217703, CN
Change and optimize, avoid its disadvantage, in favor of formal production stable operation.
Utility model content
The main purpose of the utility model is to develop a kind of bipolar membrane device for producing hypophosphorous acid, and used simultaneously resistance to time
The dedicated dedicated positive electrode for hindering sour cavity block, the Bipolar Membrane of reducing resistance, resistance to sodium hydroxide of sodium phosphate reproducibility.
The utility model is achieved by following technical proposals:
A kind of bipolar membrane device producing hypophosphorous acid, including membrane stack, it is characterised in that successively by anode membrane, resistance in each membrane stack
Sour cavity block, Bipolar Membrane composition, form three compartments；Sodium dihydric hypophosphite solution room is formed between anode membrane and the sour cavity block of resistance, it is negative to hinder acid
Acid compartment is formed between film and Bipolar Membrane, and alkaline chamber is formed between Bipolar Membrane and anode membrane；
It is placed with Bipolar Membrane between cathode electrode and membrane stack, then is sequentially placed membrane stack, outermost Bipolar Membrane is again in membrane stack
It is corresponding with anode electrode to place；
Sodium dihydric hypophosphite solution room is connected by circulation with salt box；Acid compartment is connected by circulation with sour case, and is had outside a branch line
Run in acid solution out；Alkaline chamber is connected by circulation with lye pole liquid cab signal box, and has the external discharge lye of a branch line.
A kind of salt box described in the bipolar membrane device of hypophosphorous acid, sour case, lye pole liquid cab signal box are produced preferably, above-mentioned
It is respectively provided with liquidometer.
Preferably, the branch line for the connecting line that acid compartment exports in a kind of above-mentioned bipolar membrane device for producing hypophosphorous acid
On be connected with regulating valve and flowmeter.
Preferably, the branch line for the connecting line that alkaline chamber exports in a kind of above-mentioned bipolar membrane device for producing hypophosphorous acid
On be connected with regulating valve and flowmeter.
Preferably, positive electrode is titanium platinized electrode in a kind of above-mentioned bipolar membrane device for producing hypophosphorous acid, platinum plates thickness
Degree is 0.5-5 microns.
Preferably, being matter in pole room in a kind of above-mentioned bipolar membrane device for producing hypophosphorous acid between electrode and Bipolar Membrane
Measure the sodium hydroxide solution that concentration is 2-4%.
Penalty method in a kind of bipolar membrane device producing hypophosphorous acid of the utility model automates chain control, using even
The mode of continuous supplement pure water, the qualified acid of continuous discharge or alkali carries out continuous production.Specific method is the Bipolar Membrane according to setting
The current density of group device, calculates the acid of film group device or the aggregated capacity of alkali；Further according to the concentration of qualified soda acid, to calculate conjunction
Volume in the unit time of lattice acid or alkali, i.e. flow；According to the discharge outlet flow of the qualified acid of the flow set of calculating or alkali into
Row discharge, while pure water is supplemented in corresponding sour case or alkali case, to reach the steady production of liquid level and concentration.But due to temperature
The a variety of causes such as the infiltration between degree, feed concentration and purity, three compartments can make soda acid aggregated capacity and output soda acid amount
At certain influence and fluctuation, thus need to discharge flow quantity with to do a compensation into pure water flow chain.Specific method is, according to
The soda acid delivery flow of calculated value, stationary phase answer the adjusting graduation position of control valve, and corresponding pure water are arranged, flow-rate ratio is added
The big 5-20% of soda acid flow is discharged.The flow that soda acid is discharged can influence liquid viscosity with fluctuation of concentration to delivery flow
Can follow suit micro fluctuation, further influence the liquid level of sour case or alkali case.Due to adding the flow of pure water to be much larger than the flow of discharge,
Therefore only influence the speed that high water tank rises.When liquid level rises to high liquid level, liquidometer provides signal, commands inlet valve
It turns down to the 20-50% of former setting value, so that liquid level be made to decline, when dropping to the low liquid level of setting, liquidometer provides signal,
Commander's inlet valve is restored to the 100% of setting value.To realize continuously into pure water, continuous outflow and the stable soda acid of concentration
Automatic control.The setting of the automatic control is routine techniques in industry automatic control industry, is not repeated.
The utility model has the advantages that
The utility model after being improved to the prior art, have the advantages that 1, automated using penalty method it is chain
Control, the flow of discharge and the electricity of operation need to only be adjusted by carrying out continuous discharge acid or alkali without on-line checking acid or alkali concentration
The discharge concentration of stream energy stable adjusting acid and alkali；2, it uses sodium hydroxide for pole liquid, saves pole liquid case, allow pole liquid and lye
Case shares, and developing dedicated alkaline-resisting electrode is anode plate.
Detailed description of the invention
The structural schematic diagram of Fig. 1 the utility model
The working principle diagram of Fig. 2 the utility model
Specific embodiment
With reference to the accompanying drawing, the implementation of the utility model is illustrated:
Embodiment 1
Structure shown in 1 with reference to the accompanying drawings, a kind of bipolar membrane device producing hypophosphorous acid, including membrane stack, it is characterised in that each
It is successively made of anode membrane, the sour cavity block of resistance, Bipolar Membrane in membrane stack, forms three compartments；Hypophosphorous acid is formed between anode membrane and the sour cavity block of resistance
Sodium dihydrogen solution room hinders and forms acid compartment between sour cavity block and Bipolar Membrane, forms alkaline chamber between Bipolar Membrane and anode membrane；In cathode electrode
It is placed with Bipolar Membrane between membrane stack, then is sequentially placed membrane stack, outermost Bipolar Membrane is corresponding with anode electrode again in membrane stack places；
Sodium dihydric hypophosphite solution room is connected by circulation with salt box；Acid compartment is connected by circulation with sour case, and has the external discharge acid of a branch line
Liquid；Alkaline chamber is connected by circulation with lye pole liquid cab signal box, and has the external discharge lye of a branch line.
Continuous production is carried out by the way of continuous supplementation pure water, the qualified acid of continuous discharge or alkali in the present embodiment.
Using 10 60 groups of 400*800 Bipolar Membrane group, need to produce 8% concentration hypophosphorous acid per hour is 8t, the hydrogen-oxygen of 4% concentration of output
Change sodium 1.5t, the running current of each film group device is 100A；Sour outlet flow is 7.5t/h, and the discharge outlet flow of alkali is
1.4t/h is discharged, while being 8.5t/h with flow in corresponding sour case, is mended in alkali case with flow for 1.6t/h
Fill pure water.The flow that soda acid is discharged can influence liquid viscosity with fluctuation of concentration to which delivery flow can follow suit micro wave
It is dynamic, further influence the liquid level of sour case or alkali case.Due to adding the flow of pure water much larger than the flow of discharge, therefore only influence water tank
The speed that liquid level rises.When liquid level rises to high liquid level, liquidometer provides signal, and commander's inlet valve is turned down to former setting value
50%, so that liquid level be made to decline, when dropping to stoste position 60% into liquidometer provides signal, and commander's inlet valve is restored to
The 100% of setting value.To realize continuously into the automatic control of pure water, continuous outflow and the stable soda acid of concentration.
In the present embodiment, operation logic is as shown in Fig. 2.
Embodiment 2
On the basis of embodiment 1, wherein salt box, sour case, lye pole liquid cab signal box it will be respectively provided with liquidometer, acid compartment goes out
It is connected with regulating valve and flowmeter on the branch line of the connecting line of mouth, connects on the branch line of the connecting line of alkaline chamber outlet
It is connected to regulating valve and flowmeter, positive electricity extremely titanium platinized electrode, platinum thickness of coating is 0.5-5 microns, and this electrode has alkaline-resisting
Characteristic.
In the present embodiment, acid solution is discharged, the flow of lye can influence liquid viscosity with fluctuation of concentration to arrange
Outflow can follow suit micro fluctuation, further influence the liquid level of sour case or alkali case.Due to adding the flow of pure water much larger than discharge
Flow, therefore only influence high water tank rise speed.When liquid level rises to high liquid level, liquidometer provides signal, commander
Inlet valve is turned down to the 50% of former setting value, so that liquid level be made to decline, when dropping to stoste position 60% into liquidometer provides letter
Number, commander's inlet valve is restored to the 100% of setting value.It is continuously stable into pure water, continuous outflow and concentration to realize
The automatic control of soda acid, being finally reached the utility model can be with the effect of continuous operation.
Embodiment 3
The resistance to dedicated resistance of sodium hypophosphite reproducibility on the basis of embodiment 2, in the bipolar membrane device in the present embodiment
Sour cavity block, selecting the microfiltration membranes of polystyrene is basement membrane；Basement membrane is placed in plasma chamber and carries out plasma-activated, vibration
Frequency 65MC, activation time are 50 minutes；By the basement membrane activated be immersed in propenyl benzene, two propylene benzene, benzoyl peroxide it is molten
Functional group grafting is carried out in liquid, wherein propenyl benzene, two propylene benzene, the mass ratio 50:12 of benzoyl peroxide in the solution:
0.25；Basement membrane after functional group is grafted again is using tin tetrachloride as catalyst, using chlorine propyl ether as chloropropylation under the conditions of 50 DEG C
Reagent carries out chloropropylation, obtains the chloropropyl basement membrane of chloropropylation, the trimethylamine aqueous solution for being finally 12% with mass concentration
It is carried out season ammonification 9 hours under the conditions of 25 DEG C, the sour cavity block of the dedicated resistance of resistance to sodium hypophosphite reproducibility can be obtained.
The Bipolar Membrane of reducing resistance in bipolar membrane device is to use the HDPE film with a thickness of 0.15 millimeter for counterdie, adopts
Surface active is carried out with proton-bombarded mode, then carries out the impregnation dilute reaction of phenylpropyl alcohol, the dilute content of the phenylpropyl alcohol made reaches 1.5g/m2, and
Polymerization reaction is carried out at a high temperature of 142 DEG C, forms basement membrane.With the one side in tetrafluoro plate protection basement membrane, the basement membrane leaching of another side
Bubble carries out sulfonation in 98% sulfuric acid, and reaction temperature is 75 DEG C, and the reaction time is 7 hours, forms sunny side.It is protected again with tetrafluoro plate
Completely reacted anode membrane steeps another side basement membrane in chlorine propyl ether, and reaction temperature is 65 DEG C, and the reaction time is 5 hours, forms yin
Face.It the basement membrane for having formed male and female face, is separated with HDPE net, every 5 are a reaction member, and insertion has the chlorine of tripropyl amine (TPA)
Change the electrolytic cell of sodium solution, the concentration of tripropyl amine (TPA) is 1%, sodium chloride concentration 3%.It is 45 DEG C in temperature to be powered, it is each pair of
The voltage of film is 3 volts.Catalytic Layer has been imported after being powered reaction 3 hours, has formd Bipolar Membrane.
Alkaline-resisting electrode in bipolar membrane device is anode plate, and selecting alkaline-resisting electrode is titanium platinized electrode, platinum thickness of coating
It is 3 microns.Using concentration for 3% sodium hydroxide is pole liquid.
The bipolar membrane device continuous 30 days, yield, energy consumption, concentration, purity were stablized.
Embodiment 4
It is similar to Example 3, continuous metaplasia is carried out by the way of continuous supplementation pure water, continuous discharge healing lattice acid or alkali
It produces.Using 20 60 groups of 400*800 Bipolar Membrane group, need to produce 6% concentration hypophosphorous acid per hour is 25t, 4% concentration of output
Sodium hydroxide 3.5t, the running current of each film group device are 110A；Sour outlet flow is 24t/h, and the discharge outlet flow of alkali is
3t/h is discharged, while being 28t/h with flow in corresponding sour case, and it is pure with flow to be that 4t/h supplement in alkali case
Water.When liquid level rises to high liquid level, liquidometer provides signal, and commander's inlet valve is turned down to the 50% of former setting value, thus
Decline liquid level, provides signal into, liquidometer when dropping to stoste position 60%, commander's inlet valve is restored to setting value
100%.To realize continuously into the automatic control of pure water, continuous outflow and the stable soda acid of concentration.
The sour cavity block of the dedicated resistance of resistance to sodium hypophosphite reproducibility in bipolar membrane device, selecting the microfiltration membranes of polystyrene is base
Film；Basement membrane is placed in plasma chamber and carries out plasma-activated, vibration frequency 70MC, activation time is 40 minutes；It will live
The basement membrane changed is immersed in the solution of propenyl benzene, two propylene benzene, benzoyl peroxide progress functional group grafting, wherein propenyl benzene,
The mass ratio 48:13:0.28 of two propylene benzene, benzoyl peroxide in the solution；Basement membrane after functional group is grafted again is with tetrachloro
Change tin is catalyst, carries out chloropropylation by chloropropylation reagent of chlorine propyl ether under the conditions of 47 DEG C, obtains the chlorine of chloropropylation
Propyl basement membrane is finally carried out season ammonification 10 hours under the conditions of 25 DEG C with the trimethylamine aqueous solution that mass concentration is 11%, can be obtained
To the sour cavity block of the dedicated resistance of resistance to sodium hypophosphite reproducibility.
The Bipolar Membrane of reducing resistance in bipolar membrane device is to use the HDPE film with a thickness of 0.2 millimeter for counterdie, is used
Proton-bombarded mode carries out surface active, then carry out impregnation the dilute reaction of phenylpropyl alcohol, the dilute content of the phenylpropyl alcohol made reach 1.5g/m2, and
Polymerization reaction is carried out at a high temperature of 145 DEG C, forms basement membrane.With the one side in tetrafluoro plate protection basement membrane, the basement membrane of another side impregnates
Sulfonation is carried out in 98% sulfuric acid, reaction temperature is 70 DEG C, and the reaction time is 8 hours, forms sunny side.Again with the protection of tetrafluoro plate
Completely reacted anode membrane steeps another side basement membrane in chlorine propyl ether, and reaction temperature is 70 DEG C, and the reaction time is 6 hours, forms yin
Face.It the basement membrane for having formed male and female face, is separated with HDPE net, every 5 are a reaction member, and insertion has the chlorine of tripropyl amine (TPA)
Change the electrolytic cell of sodium solution, the concentration of tripropyl amine (TPA) is 1%, sodium chloride concentration 3%.It is 45 DEG C in temperature to be powered, it is each pair of
The voltage of film is 3.5 volts.Catalytic Layer has been imported after being powered reaction 4 hours, has formd Bipolar Membrane.
Alkaline-resisting electrode in bipolar membrane device is anode plate, and selecting alkaline-resisting electrode is titanium platinized electrode, platinum thickness of coating
It is 5 microns.Using concentration for 3% sodium hydroxide is pole liquid.
The bipolar membrane device continuous 30 days, yield, energy consumption, concentration, purity were stablized.
Claims (6)
1. a kind of bipolar membrane device for producing hypophosphorous acid, including membrane stack, it is characterised in that successively by anode membrane, resistance acid in each membrane stack
Cavity block, Bipolar Membrane composition, form three compartments；Sodium dihydric hypophosphite solution room is formed between anode membrane and the sour cavity block of resistance, hinders sour cavity block
Acid compartment is formed between Bipolar Membrane, and alkaline chamber is formed between Bipolar Membrane and anode membrane；
Be placed with Bipolar Membrane between cathode electrode and membrane stack, then be sequentially placed membrane stack, in membrane stack outermost Bipolar Membrane again with sun
Pole electrode is corresponding to be placed；
Sodium dihydric hypophosphite solution room is connected by circulation with salt box；Acid compartment is connected by circulation with sour case, and is had and run in outside a branch line
Acid solution out；Alkaline chamber is connected by circulation with lye pole liquid cab signal box, and has the external discharge lye of a branch line.
2. a kind of bipolar membrane device for producing hypophosphorous acid according to claim 1, which is characterized in that the salt box, sour case,
Lye pole liquid cab signal box is respectively provided with liquidometer.
3. a kind of bipolar membrane device for producing hypophosphorous acid according to claim 1, which is characterized in that the connection of acid compartment outlet
Regulating valve and flowmeter are connected on the branch line of pipeline.
4. a kind of bipolar membrane device for producing hypophosphorous acid according to claim 1, which is characterized in that the connection of alkaline chamber outlet
Regulating valve and flowmeter are connected on the branch line of pipeline.
5. a kind of bipolar membrane device for producing hypophosphorous acid according to claim 1, which is characterized in that positive electricity extremely titanium platinum plating
Electrode, platinum thickness of coating are 0.5-5 microns.
6. a kind of bipolar membrane device for producing hypophosphorous acid according to claim 1, which is characterized in that electrode and Bipolar Membrane it
Between pole room in be mass concentration be 2-4% sodium hydroxide solution.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109589793A (en) * | 2018-12-28 | 2019-04-09 | 浙江蓝极膜技术有限公司 | A kind of bipolar membrane device producing hypophosphorous acid |
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| CN109589793A (en) * | 2018-12-28 | 2019-04-09 | 浙江蓝极膜技术有限公司 | A kind of bipolar membrane device producing hypophosphorous acid |
| CN109589793B (en) * | 2018-12-28 | 2024-01-26 | 浙江蓝极膜技术有限公司 | Bipolar membrane device for producing hypophosphorous acid |
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