CN109972163A - A kind of preparation method of sodium chlorate - Google Patents
A kind of preparation method of sodium chlorate Download PDFInfo
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- CN109972163A CN109972163A CN201910045094.7A CN201910045094A CN109972163A CN 109972163 A CN109972163 A CN 109972163A CN 201910045094 A CN201910045094 A CN 201910045094A CN 109972163 A CN109972163 A CN 109972163A
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- 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
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- C25B1/24—Halogens or compounds thereof
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Abstract
The invention belongs to chemical fields, and in particular to a kind of preparation method of sodium chlorate.The preparation method of sodium chlorate provided by the invention obtains saturated sodium chloride solution the following steps are included: first that sodium chloride is soluble in water, then filter, dilute after be electrolysed, obtain thick sodium chlorate solution；Standing is centrifuged to obtain purifying sodium chlorate solution A after ion chelating agent is added into the thick sodium chlorate solution；Then hydrochloric acid solution is added except bromine and chlorate anions, free chlorine is removed in bromine tower, must purify sodium chlorate solution B；Then be added after sodium hydroxide neutralizes and be concentrated to give concentration sodium chlorate solution, be eventually adding anti-caking agent, crystallization to get.The present invention joined ion chelating agent during preparing sodium chlorate, eliminate the metal ion in solution, keep the sodium chlorate purity obtained higher and joined efficient anti-caking agent, avoid the deficiency that sodium chlorate is easy agglomeration in placement process, it significantly improves the quality of sodium chlorate, using ultrasonic concentration, has saved the energy.
Description
Technical field
The invention belongs to chemical fields, and in particular to a kind of preparation method of sodium chlorate.
Background technique
Sodium chlorate is usually equiaxed crystal white or yellowish, and there are many purposes: printing and dyeing industry is used as the oxygen of the first cloth of dye essence
Agent can also make mordant.Inorganic industrial is used as oxidant, it can also be used to manufacture sodium chlorite and perchlorate.Medical industry
For manufacturing medicinal zinc oxide, disulfide group sodium succinate.Pigment industry is for manufacturing high grade zinc oxide and Hua Lan.Agriculturally it is used as
Herbicide.In addition, being also used to papermaking, tanning, ore treatment, seawater mention bromine and manufacture printing ink, explosive etc..With titanium dioxide
The extensive use of chlorine, the market of sodium chlorate needs also will be increasing.However, sodium chlorate crystal store for a long time and extrusion process in
The problem of there is easy to moisture absorption and agglomerations, the danger for bringing very big inconvenience to using, and thering is broken block to explode, and usually
The sodium chlorate purity of preparation is not high, contains more impurity.
Chinese patent application CN108560014A discloses a kind of preparation method of sodium chlorate, prepares chloric acid using electrolysis method
Sodium, the electrolysis method include brine section, electrowinning process and crystallizing and drying process, and the crystallizing and drying process includes crystallization, divides
From and it is dry, the crystallization refers to the sodium chlorate that sodium chlorate solution's dehydration that electrolysis obtains is made to solid, during the dehydration process
Addition has anti-caking substance；The anti-caking substance includes following components and mass ratio: 3~17 parts of silica 1, dodecyl
1~3 part of benzene sulfonic acid sodium salt, 1~3 part of lauryl sodium sulfate, 5~8 parts of stearic acid.The present invention is based on silica and stearic acid
Body is added two kinds of surfactants of neopelex and lauryl sodium sulfate and is prepared, and surfactant reduces
The surface tension and solid-liquid contact angle of solution, compounds with silica, stearic acid, further improves preventing blocking effect.But
It is that the invention is not handled the ionic impurity wherein contained in the preparation process of sodium chlorate, resulting sodium chlorate purity is not
Height, although added with anti-caking substance, preventing blocking effect is still not ideal enough.
108588746 A of Chinese patent application CN discloses a kind of method that Nacl prepares sodium chlorate, including following step
It is rapid: (1) Nacl and water to be mixed to prepare industrial brine, industrial brine is done into filtration, purification processing, by industrial brine after processing
It is put into electrolytic cell and carries out electrolysis acquisition sodium chlorate solution, then carry out vacuum and low temperature continuous evaporation and obtain Sodium Chlorate crystallization and chlorine
The mixture of acquisition is carried out the separation of Sodium Chlorate crystallization and chloric acid mother liquid of sodium, during the separation process by the mixture of sour mother liquid of sodium
Anti-caking substance is added, the chloric acid mother liquid of sodium isolated is sent into treatment trough, sulfate radical is handled, wadding is added after processing
Solidifying agent is stood, and carries out dehydration separation after standing.The present invention is regulated and controled by the ratio of calcium chloride and barium chloride, realizes chloric acid
Yield in unit time is high in the production electrolytic process of sodium, and the chlorate that the power consumption of specific yield is reduced, while being prepared has good
Good preventing blocking effect.But the sodium chlorate of this method preparation, still containing the impurity of other metal ions, purity is not high enough, and
Although and can have preventing blocking effect, performance is general.
Currently there are sodium chlorate otherwise be easy agglomeration or be added agglomeration resistance substance effect it is undesirable, and
And sodium chlorate obtained still contains other a certain amount of metal ions, purity is not high, consumes energy more.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of preparation methods of sodium chlorate.The present invention exists
It joined ion chelating agent in the preparation process of sodium chlorate, eliminate the metal ion in solution, make the sodium chlorate purity obtained
It is higher and joined efficient anti-caking agent, the deficiency that sodium chlorate is easy agglomeration during preventing is avoided, is significantly improved
The quality of sodium chlorate, and be concentrated using low temperature ultrasonic, save the energy.
The technical solution of the present invention is as follows:
A kind of preparation method of sodium chlorate, which comprises the following steps:
S1 heats water to 20-30 DEG C, and salt is added into water and stirs, until the salt in water reaches saturation, then
By salt water through strainer filtering, clear brine is obtained；
Deionized water dilution is added into clear brine obtained by step S1 by S2, obtains dilution salt water；
Dilution salt water obtained by step S2 is added in electrolytic cell and is electrolysed by S3, obtains thick sodium chlorate solution；
Ion chelating agent is added into thick sodium chlorate solution obtained by step S3 in S4,1300-1500r/ after standing 6-9 hours
Min is centrifuged 11-17min, must purify sodium chlorate solution A；
Hydrochloric acid solution is added into purifying sodium chlorate solution A obtained by step S4 in S5, and is heated to 115-120 DEG C, is removing bromine
Bromine and chlorate anions, free chlorine are removed in tower, sodium chlorate solution B must be purified；
S6 is added sodium hydroxide into purifying sodium chlorate solution B obtained by step S5 and neutralizes, and solution is then carried out ultrasonic steaming
Hair concentration, must be concentrated sodium chlorate solution；
S7 is transferred to salt dissolving tank after concentration sodium chlorate solution obtained by step S6 is washed with water, and anti-caking agent is added after desalination,
It is crystallized in vacuum crystallizer after mixing evenly to get sodium chlorate, the mass body of the anti-caking agent and concentration sodium chlorate solution
Product is than being 0.05-0.1:7.
Further, the volume ratio of clear brine and deionized water described in the step S2 is 5:1-3.
Further, electrolytic condition described in the step S3 are as follows: anode is made with graphite, cathode, interpolar distance 2-3 are made with iron
Millimeter, electrolysis temperature are 45-60 DEG C.
Further, ion chelating agent described in the step S4 is by sodium tripolyphosphate and sodium pyrophosphate 7-9:2- in mass ratio
4 compositions.
Further, the ion chelating agent is made of sodium tripolyphosphate and sodium pyrophosphate 8:3 in mass ratio.
Further, the volume ratio of purifying sodium chlorate solution A and hydrochloric acid solution described in the step S5 is 3:1-2, described
Hydrochloric acid solution is the aqueous hydrochloric acid solution that mass percent is 2%.
Further, temperature is 20-40 DEG C, supersonic frequency 120-150w when the step S6 ultrasound is concentrated by evaporation, institute
It is 650-750g/L that sodium chlorate solution's concentration, which must be concentrated,.
Further, anti-caking agent described in the step S7 is by sodium stearyl sulfate, sodium metnylene bis-naphthalene sulfonate and ten
Eight sodium carbonate salts 3-5:2-4:1-3 in mass ratio composition.
Further, the anti-caking agent is by sodium stearyl sulfate, sodium metnylene bis-naphthalene sulfonate and 18 sodium carbonate
Salt 4:3:1.5 in mass ratio composition.
Compared with prior art, the invention has the following advantages that
(1) present invention joined the ion chelating of sodium tripolyphosphate and sodium pyrophosphate composition in the preparation process of sodium chlorate
Agent, the combination of the two improve the performance of ion chelating, effectively reduce the influence of the foreign ion in sodium chlorate, improve chlorine
The purity of sour sodium.
(2) present invention joined in the preparation process of sodium chlorate sodium stearyl sulfate, sodium metnylene bis-naphthalene sulfonate and
The anti-caking agent of 18 sodium carbonate salts composition, the use in conjunction of three significantly improve the performance of each additive, effectively reduce
The caking phenomenon of sodium chlorate.
(3) present invention shortens concentration time, reduces concentration energy consumption using ultrasonic treatment in concentration process, guarantees
The quality of sodium chlorate.
Specific embodiment
The following describes the present invention further through the description of specific embodiments, but it is to limit of the invention that this, which is not,
System, those skilled in the art's basic thought according to the present invention can make various modifications or improvements, but without departing from this
The basic thought of invention, is all within the scope of the present invention.
A kind of preparation method of the sodium chlorate of embodiment 1
The preparation method of the sodium chlorate, comprising the following steps:
S1 heats water to 20 DEG C, and salt is added into water and stirs, until the salt in water reaches saturation, then by salt
Water obtains clear brine through strainer filtering；
Deionized water dilution is added into clear brine obtained by step S1 by S2, obtains dilution salt water, the clear brine and goes
The volume ratio of ionized water is 5:1；
Dilution salt water obtained by step S2 is added in electrolytic cell and is electrolysed by S3, makees anode with graphite, makees cathode, interpolar with iron
2 millimeters of distance, electrolysis temperature is 45 DEG C, obtains thick sodium chlorate solution；
S4 is added into thick sodium chlorate solution's solution obtained by step S3 by sodium tripolyphosphate and sodium pyrophosphate 7:2 in mass ratio
The ion chelating agent of composition, 1500r/min is centrifuged 11min after standing 6 hours, must purify sodium chlorate solution A；
2% aqueous hydrochloric acid solution, the purifying sodium chlorate solution are added into purifying sodium chlorate solution A obtained by step S4 by S5
The volume ratio of A and hydrochloric acid solution is 3:1, and is heated to 115 DEG C, removes bromine and chlorate anions, free chlorine in except bromine tower, obtains pure
Change sodium chlorate solution B；
S6 is added sodium hydroxide into purifying sodium chlorate solution B obtained by step S5 and neutralizes, then by solution at 20 DEG C in
120w ultrasound is concentrated by evaporation, and obtains the concentration sodium chlorate solution that concentration is 650g/L；
S7 is transferred to salt dissolving tank after concentration sodium chlorate solution obtained by step S6 is washed with water, be added after desalination by octadecyl
Sodium sulphate, sodium metnylene bis-naphthalene sulfonate and 18 sodium carbonate salts 3:2:1 in mass ratio composition anti-caking agent, after mixing evenly in
It is crystallized in vacuum crystallizer to get sodium chlorate, the anti-caking agent and the mass volume ratio that sodium chlorate solution is concentrated are 0.05:7.
A kind of preparation method of the sodium chlorate of embodiment 2
A kind of preparation method of sodium chlorate, comprising the following steps:
S1 heats water to 30 DEG C, and salt is added into water and stirs, until the salt in water reaches saturation, then by salt
Water obtains clear brine through strainer filtering；
Deionized water dilution is added into clear brine obtained by step S1 by S2, obtains dilution salt water, the clear brine and goes
The volume ratio of ionized water is 5:3；
Dilution salt water obtained by step S2 is added in electrolytic cell and is electrolysed by S3, makees anode with graphite, makees cathode, interpolar with iron
3 millimeters of distance, electrolysis temperature is 60 DEG C, obtains thick sodium chlorate solution；
S4 is added into thick sodium chlorate solution's solution obtained by step S3 by sodium tripolyphosphate and sodium pyrophosphate 9:4 in mass ratio
The ion chelating agent of composition, 1300r/min is centrifuged 17min after standing 9 hours, must purify sodium chlorate solution A；
2% aqueous hydrochloric acid solution, the purifying sodium chlorate solution are added into purifying sodium chlorate solution A obtained by step S4 by S5
The volume ratio of A and hydrochloric acid solution is 3:2, and is heated to 120 DEG C, removes bromine and chlorate anions, free chlorine in except bromine tower, obtains pure
Change sodium chlorate solution B；
S6 is added sodium hydroxide into purifying sodium chlorate solution B obtained by step S5 and neutralizes, then by solution at 40 DEG C in
150w ultrasound is concentrated by evaporation, and obtains the concentration sodium chlorate solution that concentration is 750g/L；
S7 is transferred to salt dissolving tank after concentration sodium chlorate solution obtained by step S6 is washed with water, be added after desalination by octadecyl
Sodium sulphate, sodium metnylene bis-naphthalene sulfonate and 18 sodium carbonate salts 5:4:3 in mass ratio composition anti-caking agent, after mixing evenly in
It is crystallized in vacuum crystallizer to get sodium chlorate, the anti-caking agent and the mass volume ratio that sodium chlorate solution is concentrated are 0.1:7.
A kind of preparation method of the sodium chlorate of embodiment 3
A kind of preparation method of sodium chlorate, comprising the following steps:
S1 heats water to 25 DEG C, and salt is added into water and stirs, until the salt in water reaches saturation, then by salt
Water obtains clear brine through strainer filtering；
Deionized water dilution is added into clear brine obtained by step S1 by S2, obtains dilution salt water, the clear brine and goes
The volume ratio of ionized water is 5:2；
Dilution salt water obtained by step S2 is added in electrolytic cell and is electrolysed by S3, makees anode with graphite, makees cathode, interpolar with iron
3 millimeters of distance, electrolysis temperature is 50 DEG C, obtains thick sodium chlorate solution；
S4 is added into thick sodium chlorate solution's solution obtained by step S3 by sodium tripolyphosphate and sodium pyrophosphate 8:3 in mass ratio
The ion chelating agent of composition, 1400r/min is centrifuged 15min after standing 8 hours, must purify sodium chlorate solution A；
2% aqueous hydrochloric acid solution, the purifying sodium chlorate solution are added into purifying sodium chlorate solution A obtained by step S4 by S5
The volume ratio of A and hydrochloric acid solution is 3:1, and is heated to 118 DEG C, removes bromine and chlorate anions, free chlorine in except bromine tower, obtains pure
Change sodium chlorate solution B；
S6 is added sodium hydroxide into purifying sodium chlorate solution B obtained by step S5 and neutralizes, then by solution at 32 DEG C in
130w ultrasound is concentrated by evaporation, and obtains the concentration sodium chlorate solution that concentration is 700g/L；
S7 is transferred to salt dissolving tank after concentration sodium chlorate solution obtained by step S6 is washed with water, be added after desalination by octadecyl
The anti-caking agent of sodium sulphate, sodium metnylene bis-naphthalene sulfonate and 18 sodium carbonate salts 4:3:1.5 in mass ratio composition, after mixing evenly
It is crystallized in vacuum crystallizer to get sodium chlorate, the anti-caking agent and the mass volume ratio that sodium chlorate solution is concentrated are 0.06:
7。
A kind of preparation method of the sodium chlorate of embodiment 4
A kind of preparation method of sodium chlorate, comprising the following steps:
S1 heats water to 25 DEG C, and salt is added into water and stirs, until the salt in water reaches saturation, then by salt
Water obtains clear brine through strainer filtering；
Deionized water dilution is added into clear brine obtained by step S1 by S2, obtains dilution salt water, the clear brine and goes
The volume ratio of ionized water is 5:3；
Dilution salt water obtained by step S2 is added in electrolytic cell and is electrolysed by S3, makees anode with graphite, makees cathode, interpolar with iron
2 millimeters of distance, electrolysis temperature is 50 DEG C, obtains thick sodium chlorate solution；
S4 is added into thick sodium chlorate solution's solution obtained by step S3 by sodium tripolyphosphate and sodium pyrophosphate 7:3 in mass ratio
The ion chelating agent of composition, 1400r/min is centrifuged 16min after standing 7 hours, must purify sodium chlorate solution A；
2% aqueous hydrochloric acid solution, the purifying sodium chlorate solution are added into purifying sodium chlorate solution A obtained by step S4 by S5
The volume ratio of A and hydrochloric acid solution is 3:2, and is heated to 117 DEG C, removes bromine and chlorate anions, free chlorine in except bromine tower, obtains pure
Change sodium chlorate solution B；
S6 is added sodium hydroxide into purifying sodium chlorate solution B obtained by step S5 and neutralizes, then by solution at 25 DEG C in
140w ultrasound is concentrated by evaporation, and obtains the concentration sodium chlorate solution that concentration is 700g/L；
S7 is transferred to salt dissolving tank after concentration sodium chlorate solution obtained by step S6 is washed with water, be added after desalination by octadecyl
Sodium sulphate, sodium metnylene bis-naphthalene sulfonate and 18 sodium carbonate salts 4:2:3 in mass ratio composition anti-caking agent, after mixing evenly in
It is crystallized in vacuum crystallizer to get sodium chlorate, the anti-caking agent and the mass volume ratio that sodium chlorate solution is concentrated are 0.8:7.
A kind of preparation method of the sodium chlorate of comparative example 1
The preparation method of the sodium chlorate is similar to Example 3, the difference with embodiment 3 be described in the step S4 from
Sub- chelating agent is sodium tripolyphosphate, is free of sodium pyrophosphate.
A kind of preparation method of the sodium chlorate of comparative example 2
The preparation method of the sodium chlorate is similar to Example 3, the difference with embodiment 3 be described in the step S4 from
Sub- chelating agent is sodium pyrophosphate, is free of sodium tripolyphosphate.
A kind of preparation method of the sodium chlorate of comparative example 3
The preparation method of the sodium chlorate is similar to Example 3, and the difference with embodiment 3 is to evaporate in the step S6
The method of concentration is to be evaporated using cold boiler.
A kind of preparation method of the sodium chlorate of comparative example 4
The preparation method of the sodium chlorate is similar to Example 3, and the difference with embodiment 3 is to resist described in the step S7
Agglomeration agent is sodium stearyl sulfate, is free of sodium metnylene bis-naphthalene sulfonate and 18 sodium carbonate salts.
A kind of preparation method of the sodium chlorate of comparative example 5
The preparation method of the sodium chlorate is similar to Example 3, and the difference with embodiment 3 is to resist described in the step S7
Agglomeration agent is sodium metnylene bis-naphthalene sulfonate, is free of sodium stearyl sulfate, 18 sodium carbonate salts.
A kind of preparation method of the sodium chlorate of comparative example 6
The preparation method of the sodium chlorate is similar to Example 3, and the difference with embodiment 3 is to resist described in the step S7
Agglomeration agent is 18 sodium carbonate salts, is free of sodium stearyl sulfate, sodium metnylene bis-naphthalene sulfonate.
1 sodium chlorate intermediate ion test experience of test example
1, experimental material: chloric acid made from embodiment 1, embodiment 2, embodiment 3, embodiment 4, comparative example 1 and comparative example 2
Sodium.
2, experimental method: by chlorine made from embodiment 1, embodiment 2, embodiment 3, embodiment 4, comparative example 1 and comparative example 2
Sour sodium detects the calcium ion and magnesium ion wherein contained using Element detection instrument.
3, experimental result: experimental result is as shown in table 1.
1 ion detection result of table
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Comparative example 1 | Comparative example 2 |
| Calcium ion concentration | 0.04% | 0.03% | 0.02% | 0.04% | 0.09% | 0.1% |
| Magnesium ion concentration | 0.001% | 0.001% | 0.0007% | 0.0009% | 0.02% | 0.03% |
As can be seen from Table 1, embodiment 1, embodiment 2, embodiment 3, the calcium ion in embodiment 4 and magnesium ion
Ion concentration of the concentration than each comparative example is low, and the calcium ion of embodiment 3 and the concentration of magnesium ion only have 0.02% He
0.0007%, it is far below professional standard.
Experiment is concentrated in 2 sodium chlorate solution of experimental example
1, experimental material: embodiment 3 and the resulting purifying sodium chlorate solution B of comparative example 3.
2, experimental method: equivalent embodiment 3 and the resulting purifying sodium chlorate solution B of comparative example 3 are taken respectively, by embodiment 3
Purifying sodium chlorate solution B be concentrated with low temperature ultrasonic method, the purifying sodium chlorate solution B of comparative example 3 is concentrated with cold boiler, point
Not Ji Suan solution be condensed into time of 700g/L.
3, experimental result: experimental result is as shown in table 2.
2 concentration time result of table
| Project | Embodiment 3 | Comparative example 3 |
| Concentration time | 20min | 32min |
As can be seen from Table 2, when isometric purifying sodium chlorate solution B is concentrated, low temperature used in embodiment 3 is super
The method for acoustic concentration time used is 20min, hence it is evident that less than the 32min of comparative example 3.
3 sodium chlorate blocking test of test example
1, experimental material: embodiment 1, embodiment 2, embodiment 3, embodiment 4, comparative example 4, comparative example 5 and comparative example 6 are made
The sodium chlorate obtained.
2, equivalent embodiment 1, embodiment 2, embodiment 3, embodiment 4, comparative example 4, comparative example 5 and right experimental method: are taken
Sodium chlorate made from ratio 6 is placed in the environment that air humidity is 80%, and record agglomeration forms the time.
3, experimental result: experimental result is as shown in table 3.
3 sodium chlorate clotting time of table
As can be seen from Table 3, embodiment 1, embodiment 2, embodiment 3, time used in agglomeration used in embodiment 4
Time than each comparative example agglomeration is long, and the time used in the agglomeration of embodiment 3 needs 14min, and anti-caking performance is obvious
It improves.
In summary test result can be seen that the preparation method that uses of the present invention is more rapidly energy saving, contained impurity from
Sub- content is lower, and anti-caking performance is more preferable, and the properties of the sodium chlorate of the preparation of embodiment 3 are best, best for the present invention
Embodiment.
Claims (9)
1. a kind of preparation method of sodium chlorate, which comprises the following steps:
S1 heats water to 20-30 DEG C, and salt is added into water and stirs, until the salt in water reaches saturation, then by salt
Water obtains clear brine through strainer filtering；
Deionized water dilution is added into clear brine obtained by step S1 by S2, obtains dilution salt water；
Dilution salt water obtained by step S2 is added in electrolytic cell and is electrolysed by S3, obtains thick sodium chlorate solution；
Ion chelating agent is added into thick sodium chlorate solution obtained by step S3 in S4, after standing 6-9 hours 1300-1500r/min from
Heart 11-17min must purify sodium chlorate solution A；
Hydrochloric acid solution is added into purifying sodium chlorate solution A obtained by step S4 in S5, and is heated to 115-120 DEG C, in except bromine tower
By bromine and chlorate anions, free chlorine removal, sodium chlorate solution B must be purified；
S6 is added sodium hydroxide into purifying sodium chlorate solution B obtained by step S5 and neutralizes, and it is dense that solution is then carried out ultrasound evaporation
Contracting, must be concentrated sodium chlorate solution；
S7 is transferred to salt dissolving tank after concentration sodium chlorate solution obtained by step S6 is washed with water, and anti-caking agent is added after desalination, stirs
It is crystallized in vacuum crystallizer after uniformly to get sodium chlorate, the mass volume ratio of the anti-caking agent and concentration sodium chlorate solution
For 0.05-0.1:7.
2. the preparation method of sodium chlorate according to claim 1, which is characterized in that clear brine described in the step S2 and
The volume ratio of deionized water is 5:1-3.
3. the preparation method of sodium chlorate according to claim 1, which is characterized in that electrolytic condition described in the step S3
Are as follows: anode is made with graphite, cathode is made with iron, 2-3 millimeters of interpolar distance, electrolysis temperature is 45-60 DEG C.
4. the preparation method of sodium chlorate according to claim 1, which is characterized in that ion chelating agent described in the step S4
It is made of sodium tripolyphosphate and sodium pyrophosphate 7-9:2-4 in mass ratio.
5. the preparation method of sodium chlorate according to claim 4, which is characterized in that the ion chelating agent is by tripolyphosphate
Sodium and sodium pyrophosphate 8:3 in mass ratio composition.
6. the preparation method of sodium chlorate according to claim 1, which is characterized in that purify sodium chlorate described in the step S5
Solution A and the volume ratio of hydrochloric acid solution are 3:1-2, and the hydrochloric acid solution is the aqueous hydrochloric acid solution that mass percent is 2%.
7. the preparation method of sodium chlorate according to claim 1, which is characterized in that when the step S6 ultrasound is concentrated by evaporation
Temperature is 20-40 DEG C, supersonic frequency 120-150w, and it is 650-750g/L that sodium chlorate solution's concentration, which is concentrated, in gained.
8. the preparation method of sodium chlorate according to claim 1, which is characterized in that anti-caking agent described in the step S7 by
Sodium stearyl sulfate, sodium metnylene bis-naphthalene sulfonate and 18 sodium carbonate salts 3-5:2-4:1-3 in mass ratio composition.
9. the preparation method of sodium chlorate according to claim 8, which is characterized in that the anti-caking agent is by octadecyl sulphur
Sour sodium, sodium metnylene bis-naphthalene sulfonate and 18 sodium carbonate salts 4:3:1.5 in mass ratio composition.
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| CN115142076A (en) * | 2022-07-28 | 2022-10-04 | 浙江红狮环保股份有限公司 | Technology for preparing sodium chlorate from aluminum ash |
| CN115142076B (en) * | 2022-07-28 | 2024-02-20 | 浙江红狮环保股份有限公司 | Technology for preparing sodium chlorate from aluminum ash |
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