CN105947985A - Chlorine dioxide preparation method capable of recycling sodium acid sulfate - Google Patents
Chlorine dioxide preparation method capable of recycling sodium acid sulfate Download PDFInfo
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- CN105947985A CN105947985A CN201610284174.4A CN201610284174A CN105947985A CN 105947985 A CN105947985 A CN 105947985A CN 201610284174 A CN201610284174 A CN 201610284174A CN 105947985 A CN105947985 A CN 105947985A
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- sodium
- sulfate
- chlorine dioxide
- sodium acid
- acid sulfate
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B11/00—Oxides or oxyacids of halogens; Salts thereof
- C01B11/02—Oxides of chlorine
- C01B11/022—Chlorine dioxide (ClO2)
- C01B11/023—Preparation from chlorites or chlorates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/02—Preparation of sulfates from alkali metal salts and sulfuric acid or bisulfates; Preparation of bisulfates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/18—Dehydration
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The present invention discloses a chlorine dioxide preparation method capable of recycling sodium acid sulfate. According to the method, firstly, a sodium chlorate solution is filtered to be injected into a generator together with concentrated sulfuric acid to form a reaction mother liquor. Secondly, a mixed reducing agent composed of methanol and hydrogen peroxide is added, and then chlorine dioxide gas and a small amount of chlorine are generated after reaction. Thirdly, the chlorine dioxide gas is cooled and then is absorbed by the low-temperature chilled water to obtain a chlorine dioxide aqueous solution. During the continuous generation of chlorine dioxide, sodium acid sulfate crystals are generated at the same time as a by-product. After that, the sodium acid sulfate crystals are fed into an aqueous solution in a sodium sulfate converter reactor. The low-pressure steam is introduced to heat an obtained product and then the obtained product is stirred continuously. After the replacement reaction of sodium acid sulfate, a neutral sodium sulfate slurry is dehydrated through a sodium sulfate filtering machine. An obtained thickened suspension liquid is washed by the sodium sulfate filtering machine to obtain neutral sodium sulfate crystals finally. According to the technical scheme of the invention, the problem in the prior art that sodium acid sulfate, generated during the preparation of chlorine dioxide, is difficult to process and easily causes the secondary pollution can be solved. Meanwhile, the purpose of turning waste into wealth is realized. Moreover, the comprehensive utilization of resources is realized.
Description
Technical field
The present invention relates to chlorine dioxide production field, the chlorine dioxide of a kind of recyclable sodium acid sulfate
Preparation method.
Technical background
Chlorine dioxide is a kind of strong oxidizer, and stable chlorine dioxide is considered effect by World Health Organization (WHO)
The best antibacterial and the disinfection sanitizer of function admirable, be also good papermaking bleach.From 19th-century
The '30s rises, and starts industrialized production, has about 1000 chlorine dioxide raw at present in North America and Europe
Produce factory.The preparation method of chlorine dioxide is broadly divided into two big classes: electrolysis and chemical method.Electrolysis be by
The sodium chlorate that saline solution electrolysis obtains is direct and hydrochloric acid reaction generation chlorine dioxide in device.The seventies with
Successively to develop the new side being electrolyte electrolytic synthesis chlorine dioxide with sodium chloride, sodium chlorate and sodium chlorite
Method, this method equipment investment is big, and complex process does not the most obtain spread.Chemical method is divided into again
Sodium chlorate reducing process and sodium chlorite reducing process.Sodium chlorate reducing process includes 12 kinds of methods such as R1 to R12.
The preparation method of chlorine dioxide is broadly divided into two big classes: electrolysis and chemical method.Electrolysis is to eat
The sodium chlorate that saline electrolysis obtains is direct and hydrochloric acid reaction generation chlorine dioxide in device.Since the seventies
External successively develop with sodium chloride, sodium chlorate and sodium chlorite for electrolyte electrolytic synthesis chlorine dioxide new
Method, this method equipment investment is big, and complex process is not the most promoted.Chemical method is divided into again: chlorine
Acid sodium reduction and sodium chlorite reducing process.Sodium chlorate reducing process includes 12 kinds of methods such as R1 to R12.
Wherein, R8 method since industrialization in 1985, the most current the most widely used chlorine dioxide production
Method.The methanol method that U.S. A Bulaite/Wilson's company improves is referred to as R8 method, be a kind of use sodium chlorate,
Sulphuric acid and the method for methanol production chlorine dioxide.At titanium vessels under strong acid, certain temperature, vacuum condition
Middle reduction sodium chlorate produces chlorine dioxide with high purity continuously, and chlorine dioxide uses freezing water after cooling
Absorb, obtain that there is finite concentration ClO 2 solution.Reaction system acidity is generally at 8.0N-8.2N, knot
Reaction system is really continuously generated sodium acid sulfate (also referred to as sesquialter sodium sulfate).
Patent publication No. be US4325934 technical scheme described in make the solid phase from chlorine dioxide production
By-product sodium acid sulfate contacts with methanol aqueous solution to generate solid phase sodium sulfate.Water and acid used by this technology
The weight ratio of sodium sulfate is 0.6:1-0.8:1, and methanol is 0.3:1-0.8:1 with the weight ratio of sodium acid sulfate.
This technique gas from acid solution is back to use chlorine dioxide generator after washing excessive methanol.This is accomplished by as gas
Wash operation both expensive expense.Patent publication No. be CA1118184 technical scheme described in make solid phase by-product
Thing contacts with warm water, by multistage dialysis-washing operation, sodium acid sulfate effectively changes into neutral sulphates
Sodium.But finding to be frequently occluded, often produce 1 ton of chlorine dioxide, generator evaporating loads about increases 3-4 ton water.
Owing to sodium acid sulfate is highly acid, corrosivity is strong, and using value is low, it is difficult to effectively applied
Field.To excavate its application potential, it is necessary to be translated into neutral sulphates sodium.It is easiest to the side realized
Method is exactly acid-base neutralization, but using at present chlorine dioxide to substitute chlorine has been irreversible trend, so with
Needing the sodium acid sulfate neutralized to get more and more, result makes sodium hydroxide and chlorine imbalance in chlor-alkali plant.
Sodium hydroxide concentration increases, and the consumption of chlorine reduces, and result is that production cost increases.Additionally, due to it is sour
The acid of formula sodium sulfate is neutralized, it is necessary to chlorine dioxide generator continuous supplementation sulphuric acid with keep needed for acid
Degree, also makes production cost increase further.For sulfate pulping enterprise, this sodium acid sulfate is in principle
Alkali collection workshop can be delivered to recycle, but in actual application, often occur that vaporizer is tied
The phenomenons such as dirt, black liquor spray gun spray nozzle clogging；And for soda pulping process enterprise, sodium acid sulfate is the most any
Recycle and be worth.Therefore a lot of enterprises select directly to drain, and this not only pollutes environment, and wastes chemistry
Product resource.Therefore carry out chlorine dioxide side-product sodium acid sulfate research on utilization, accomplish comprehensive utilization of resources,
Reduce production cost, it has also become industry is known together.
Summary of the invention
The technical problem to be solved is to provide the chlorine dioxide system of a kind of recyclable sodium acid sulfate
Preparation Method, to improve the utilization rate of sodium chlorate, reduces chlorine content in ClO 2 solution, improves chemistry anti-
The stability answered, and reach comprehensive utilization of resources, the purpose of reduction chlorine dioxide production cost.
The technical scheme is that
A kind of chlorine dioxide preparation method of recyclable sodium acid sulfate, operating procedure is as follows:
With the dense sulfur that weight concentration is 93% after the most first the sodium chlorate solution that weight concentration is 519g/L being filtered
Formation reaction mother liquor in generator is injected in acid together, controls the acidity of mother solution, temperature and chloric acid in reactor
Na concn keeps after a period of stabilisation, adds the mixing reducing agent being made up of methanol and hydrogen peroxide, wherein
The weight percent that methanol and hydrogen peroxide add is: methanol 61.4～69.1%: hydrogen peroxide 30.9～
38.6%, reaction produces chlorine dioxide and a small amount of chlorine, and side-product sodium acid sulfate is the most simultaneously
At generator intercrystalline.
2. chlorine dioxide absorbs with freezing water after cooling, obtains aqueous solution of chlorine dioxide.
3. part is occurred by the side-product sodium acid sulfate crystallization of step 1 by filtered over sodium sulfate machine charging pump
Device liquid (sulfate crystal is contained in the inside) is delivered to filtered over sodium sulfate machine and sodium acid sulfate crystallization is filtered out,
Now obtain crystallizes for sodium acid sulfate.
4. sodium acid sulfate crystallization is sent in sodium sulfate conversion reactor aqueous solution, be passed through low-pressure steam heating
And be stirred continuously, controlling sodium sulfate density of suspending liquid and acidity, generation metathesis reaction is obtained by sodium acid sulfate
To the neutral sulphates sodium crystal that mass dryness fraction is 94%～96%.
5. mass dryness fraction is the neutral sulphates sodium crystal of 94%, enters exsiccator through fluidized bed dryer feeding mouth.Logical
The condensed water that the air of fluidized bed exsiccator is added heat pipe exit by fluid bed preheats, and temperature reaches
Enter back into fluid bed after 60 DEG C～90 DEG C to be dried, obtain sodium sulfate.
Neutral sulphates sodium slurry after described metathesis reaction is dehydrated by filtered over sodium sulfate machine, filtered over sodium sulfate
Owner to be made up of cyclone hydraulic separators and vacuum filter two parts.
The sodium sulfate purity that described method produces reaches more than 95%.
After described method is applied in chlorine dioxide preparation system, sulphuric acid, the consumption of sodium chlorate reduce respectively
17-24% and 23～35%.
Sodium bisulfate use double decomposition and filter vacuum filter and fluid bed short distance dry technology, can
Obtain industrial Matrii Sulfas Exsiccatus, deliver to alkali collection workshop and use or the most for sale.The present invention had both solved two
In chlorine monoxid preparation, sodium bisulfate is difficult, be easily generated the problem of secondary pollution, can turn waste into wealth again,
Achieve the comprehensive utilization of resource, have a good application prospect.
Advantage and the advance of the present invention mainly have:
1. the double decomposition characteristic the washing and filtering that utilize bisulphate sodium solution realize sodium sulfate neutralization, Quan Liu
Cheng Wuxu adds any chemistry.
2. the sodium sulfate of output can directly substitute outsourcing Natrii Sulfas for alkali collection furnace room, thus avoids awns
Vaporizer is affected by nitre solution pumping evaporation section.
Detailed description of the invention
The inventive method after first the sodium chlorate solution that weight concentration is 519g/L being filtered with weight concentration is
The concentrated sulphuric acid of 93% injects formation reaction mother liquor in generator together, controls the acidity of mother solution, temperature in reactor
Degree and density of sodium chlorate keep after a period of stabilisation, add the mixing being made up of methanol and hydrogen peroxide also
Former dose.Reaction produces chlorine dioxide and a small amount of chlorine, and chlorine dioxide uses freezing after cooling
Water absorbs, and obtains aqueous solution of chlorine dioxide.While chlorine dioxide constantly generates, side-product acid sulfur
Acid sodium is the most constantly at generator intercrystalline, by filtered over sodium sulfate machine charging pump by part generator liquid
(sodium sulfate crystal is contained in the inside) is delivered to filtered over sodium sulfate machine and is filtered out by sodium sulfate crystal, now obtains
For sodium acid sulfate.This sodium acid sulfate is sent in sodium sulfate conversion reactor aqueous solution, is passed through low pressure
Steam heats and is stirred continuously, and controls sodium sulfate density of suspending liquid and acidity, and sodium acid sulfate will occur subdivision
Solve reaction.During work, by the sodium sulfate slurry in reactor by cyclone hydraulic separators feeding import, with at a high speed
Rate enters the internal cavity of cyclone hydraulic separators, owing to crystalline density is relatively big, through gravitational settling and by small-bore
Crystal outlet is discharged；After suspension after enrichment is washed by filtered over sodium sulfate machine washing, the neutral sulphates sodium obtained
Crystal is discharged from discharging opening, and remaining mother solution is carried some microlites secretly and discharged from mother solution discharging opening, and is back to
Reactor.Mass dryness fraction is the neutral sulphates sodium crystal of 90～93%, enters through fluidized bed dryer feeding mouth and is dried
Device.The condensed water that the air being passed through fluidized bed dryer is added heat pipe exit by fluid bed preheats, temperature
Enter back into fluid bed after reaching about 60～90 DEG C, it is achieved recycling of heat, reduce condensed water simultaneously
Temperature, improves the utilization rate of heat.The structure of snakelike heating coil and quantity in appropriate design fluidising chamber, with
Ensure that sodium sulfate can be dried completely, realize again Natrii Sulfas moderate temperature at discharging, in order to directly pack, it is to avoid
The use of sodium sulfate cooling device.Through the well-designed squamous fin having auxiliary to be dried inside fluid bed, can be by
In fluid bed, the Force decomposition of air distribution plate hot blast is upwards with one component forward, not only improves and fills
Divide and realize fluidisation, the material being dried can be made simultaneously to be discharged rapidly towards discharging opening, reduce solid accumulation, improve
Drying efficiency.
Below in conjunction with embodiment, the present invention is described in further detail.Should be understood that these embodiments are simply
In order to demonstrate the invention, rather than limit the scope of the present invention by any way.
Embodiment 1
A kind of chlorine dioxide preparation method of recyclable sodium acid sulfate, operating procedure is as follows:
With the dense sulfur that weight concentration is 93% after the most first the sodium chlorate solution that weight concentration is 519g/L being filtered
Formation reaction mother liquor in generator is injected in acid together, controls the acidity of mother solution, temperature and chloric acid in reactor
Na concn keeps after a period of stabilisation, adds the mixing reducing agent being made up of methanol and hydrogen peroxide, wherein
The weight percent that methanol and hydrogen peroxide add is: methanol 61.4: hydrogen peroxide 38.6%.Reaction is produced
Raw chlorine dioxide and a small amount of chlorine, side-product sodium acid sulfate is the most constantly tied in generator simultaneously
Brilliant.
2. chlorine dioxide absorbs with freezing water after cooling, obtains aqueous solution of chlorine dioxide.
3. side-product sodium acid sulfate crystallizes (inner for part generator liquid by filtered over sodium sulfate machine charging pump
Sulfate crystal is contained in face) deliver to filtered over sodium sulfate machine by sodium acid sulfate crystallization filter out, now obtain
For sodium acid sulfate crystallize.
4. sodium acid sulfate crystallization is sent in sodium sulfate conversion reactor aqueous solution, be passed through low-pressure steam heating
And be stirred continuously, controlling sodium sulfate density of suspending liquid and acidity, generation metathesis reaction is obtained by sodium acid sulfate
The neutral sulphates sodium crystal arrived.During work, by the sodium sulfate slurry in reactor by cyclone hydraulic separators feeding
Import, enters the internal cavity of cyclone hydraulic separators with two-forty, owing to crystalline density is relatively big, through gravitational settling also
Discharged by the outlet of small-bore crystal；After suspension after enrichment is washed by filtered over sodium sulfate machine washing, obtain
Neutral sulphates sodium crystal from discharging opening discharge, remaining mother solution carry secretly some microlites from mother solution discharging opening arrange
Go out, and be back to reactor.
5. mass dryness fraction is the neutral sulphates sodium crystal of 94%, enters exsiccator through fluidized bed dryer feeding mouth.Logical
The condensed water that the air of fluidized bed exsiccator is added heat pipe exit by fluid bed preheats, and temperature reaches
Enter back into fluid bed after about 60 DEG C to be dried, obtain sodium sulfate.
After the method is applied in chlorine dioxide preparation system, it is effectively increased the conversion ratio of sodium chlorate, sulphuric acid,
The consumption of sodium chlorate reduces by 17% and 23% respectively, and the Matrii Sulfas Exsiccatus purity of production reaches 95.7%.
Embodiment 2
A kind of chlorine dioxide preparation method of recyclable sodium acid sulfate, operating procedure is as follows:
With the dense sulfur that weight concentration is 93% after the most first the sodium chlorate solution that weight concentration is 519g/L being filtered
Formation reaction mother liquor in generator is injected in acid together, controls the acidity of mother solution, temperature and chloric acid in reactor
Na concn keeps after a period of stabilisation, adds the mixing reducing agent being made up of methanol and hydrogen peroxide, wherein
The weight percent that methanol and hydrogen peroxide add is: methanol 65.9%: hydrogen peroxide 34.1%.Reaction is produced
Raw chlorine dioxide and a small amount of chlorine, side-product sodium acid sulfate is the most constantly tied in generator simultaneously
Brilliant.
2. chlorine dioxide absorbs with freezing water after cooling, obtains aqueous solution of chlorine dioxide.
3. side-product sodium acid sulfate crystallizes (inner for part generator liquid by filtered over sodium sulfate machine charging pump
Sulfate crystal is contained in face) deliver to filtered over sodium sulfate machine by sodium acid sulfate crystallization filter out, now obtain
For sodium acid sulfate crystallize.
4. sodium acid sulfate crystallization is sent in sodium sulfate conversion reactor aqueous solution, be passed through low-pressure steam heating
And be stirred continuously, controlling sodium sulfate density of suspending liquid and acidity, generation metathesis reaction is obtained by sodium acid sulfate
The neutral sulphates sodium crystal arrived.During work, by the sodium sulfate slurry in reactor by cyclone hydraulic separators feeding
Import, enters the internal cavity of cyclone hydraulic separators with two-forty, owing to crystalline density is relatively big, through gravitational settling also
Discharged by the outlet of small-bore crystal；After suspension after enrichment is washed by filtered over sodium sulfate machine washing, obtain
Neutral sulphates sodium crystal from discharging opening discharge, remaining mother solution carry secretly some microlites from mother solution discharging opening arrange
Go out, and be back to reactor.
5. mass dryness fraction is the neutral sulphates sodium crystal of 94%, enters exsiccator through fluidized bed dryer feeding mouth.Logical
The air of fluidized bed exsiccator is added the condensed water in heat pipe exit by fluid bed to carry out preheating temperature and reaches 80
Enter back into fluid bed after about DEG C to be dried, obtain sodium sulfate.
After this method is applied in chlorine dioxide preparation system, it is effectively increased the conversion ratio of sodium chlorate, sulphuric acid,
The consumption of sodium chlorate reduces by 20% and 29% respectively, and the Matrii Sulfas Exsiccatus purity of production reaches 96.8%.
Embodiment 3
A kind of chlorine dioxide preparation method of recyclable sodium acid sulfate, operating procedure is as follows:
With the dense sulfur that weight concentration is 93% after the most first the sodium chlorate solution that weight concentration is 519g/L being filtered
Formation reaction mother liquor in generator is injected in acid together, controls the acidity of mother solution, temperature and chloric acid in reactor
Na concn keeps after a period of stabilisation, adds the mixing reducing agent being made up of methanol and hydrogen peroxide, wherein
The weight percent that methanol and hydrogen peroxide add is: methanol 69.1%: hydrogen peroxide 30.9%.Reaction
Producing chlorine dioxide and a small amount of chlorine, side-product sodium acid sulfate is the most constantly tied in generator simultaneously
Brilliant.
2. chlorine dioxide absorbs with freezing water after cooling, obtains aqueous solution of chlorine dioxide.
3. side-product sodium acid sulfate crystallizes (inner for part generator liquid by filtered over sodium sulfate machine charging pump
Sulfate crystal is contained in face) deliver to filtered over sodium sulfate machine by sodium acid sulfate crystallization filter out, now obtain
For sodium acid sulfate crystallize.
4. sodium acid sulfate is sent in sodium sulfate conversion reactor aqueous solution, be passed through low-pressure steam and heat not
Disconnected stirring, controls sodium sulfate density of suspending liquid and acidity, and sodium acid sulfate will occur metathesis reaction.Work
Time, by the sodium sulfate slurry in reactor by cyclone hydraulic separators feeding import, enter spinning liquid with two-forty and divide
From the internal cavity of device, owing to crystalline density is relatively big, discharge through gravitational settling and by the outlet of small-bore crystal；
After suspension after enrichment is washed by filtered over sodium sulfate machine washing, the neutral sulphates sodium crystal obtained is arranged from discharging opening
Going out, remaining mother solution is carried some microlites secretly and is discharged from mother solution discharging opening, and is back to reactor.
5. mass dryness fraction is the neutral sulphates sodium crystal of 96%, enters exsiccator through fluidized bed dryer feeding mouth.Logical
The condensed water that the air of fluidized bed exsiccator is added heat pipe exit by fluid bed preheats, and temperature reaches
Enter back into fluid bed after about 90 DEG C to be dried, obtain sodium sulfate.
After this method is applied in chlorine dioxide preparation system, it is effectively increased the conversion ratio of sodium chlorate, sulphuric acid,
The consumption of sodium chlorate reduces by 24% and 35% respectively, and the Matrii Sulfas Exsiccatus purity of production reaches 97.9%.
Claims (3)
1. the chlorine dioxide preparation method of a recyclable sodium acid sulfate, it is characterised in that: operation step
Rapid as follows:
1) with the dense sulfur that weight concentration is 93% after first the sodium chlorate solution that weight concentration is 519g/L being filtered
Formation reaction mother liquor in generator is injected in acid together, controls the acidity of mother solution, temperature and chloric acid in reactor
Na concn keeps after a period of stabilisation, adds the mixing reducing agent being made up of methanol and hydrogen peroxide, wherein
The weight percent that methanol and hydrogen peroxide add is: methanol 61.4～69.1%: hydrogen peroxide 30.9～
38.6%, reaction produces chlorine dioxide and a small amount of chlorine, and side-product sodium acid sulfate is the most simultaneously
At generator intercrystalline；
2) chlorine dioxide absorbs with freezing water after cooling, obtains aqueous solution of chlorine dioxide；
3) part is occurred by the side-product sodium acid sulfate crystallization of step 1 by filtered over sodium sulfate machine charging pump
Device liquid, the inside contains sulfate crystal, delivers to filtered over sodium sulfate machine and sodium acid sulfate crystallization is filtered out,
Now obtain crystallizes for sodium acid sulfate；
4) sodium acid sulfate crystallization is sent in sodium sulfate conversion reactor aqueous solution, be passed through low-pressure steam and add
Heat is also stirred continuously, and controls sodium sulfate density of suspending liquid and acidity, and sodium acid sulfate will occur metathesis reaction
The mass dryness fraction obtained is the neutral sulphates sodium crystal of 94%～96%；
5) mass dryness fraction is the neutral sulphates sodium crystal of 94%, enters exsiccator through fluidized bed dryer feeding mouth；
The condensed water that the air being passed through fluidized bed dryer is added heat pipe exit by fluid bed preheats, and temperature reaches
Enter back into fluid bed after 60 DEG C～90 DEG C to be dried, obtain sodium sulfate.
The chlorine dioxide preparation method of a kind of recyclable sodium acid sulfate the most as claimed in claim 1, it is special
Levy and be: the sodium sulfate purity that method produces reaches more than 95%.
The chlorine dioxide preparation method of a kind of recyclable sodium acid sulfate the most as claimed in claim 1, it is special
Levy and be: apply the chlorine dioxide preparation method of described recyclable sodium acid sulfate, sulphuric acid, the disappearing of sodium chlorate
Consumption reduces by 17～24% and 23～35% respectively.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112479324A (en) * | 2019-09-12 | 2021-03-12 | 杭州友智环保科技有限公司 | Chlorine dioxide generator for sewage treatment |
| CN115367709A (en) * | 2021-10-09 | 2022-11-22 | 四川锦美绿源环保科技有限公司 | Waste acid-free sodium chlorite production process and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112479324A (en) * | 2019-09-12 | 2021-03-12 | 杭州友智环保科技有限公司 | Chlorine dioxide generator for sewage treatment |
| CN115367709A (en) * | 2021-10-09 | 2022-11-22 | 四川锦美绿源环保科技有限公司 | Waste acid-free sodium chlorite production process and application thereof |
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| CN105947985B (en) | 2018-08-21 |
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