Preparation method of sodium chlorate

A technology of sodium chlorate and crude sodium chlorate, applied in the direction of electrolysis process, electrolysis components, etc., can solve the problems of unsatisfactory effect of anti-caking substances, insufficient purity, and low purity, so as to shorten the concentration time, improve the purity, The effect of improving performance

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Problems solved by technology

But the sodium chlorate that this method prepares still contains the impurity of other metal ions, and purity is not high enough, and although anti-caking effect can be arranged, performance is general
[0005] The sodium chlorate currently on the market is either easy to agglomerate, or the effect of the anti-caking substances added is not ideal, and the prepared sodium chlorate still contains a certain amount of other metal ions, the purity is not high, and the energy consumption is relatively high.

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  • Preparation method of sodium chlorate

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Embodiment 1

[0029] A kind of preparation method of sodium chlorate of embodiment 1

[0030] The preparation method of described sodium chlorate, comprises the following steps:

[0031] S1 Heat the water to 20°C, add salt to the water and stir until the salt in the water is saturated, then filter the salt water through a filter to obtain pure salt water;

[0032] S2 Add deionized water to the pure brine obtained in step S1 to dilute to obtain diluted brine, the volume ratio of the pure brine to deionized water is 5:1;

[0033] S3 adds the diluted brine obtained in step S2 into an electrolytic cell for electrolysis, with graphite as the anode and iron as the cathode, with a distance of 2 millimeters between the poles, and an electrolysis temperature of 45° C. to obtain a thick sodium chlorate solution;

[0034] S4 adds the ion chelating agent that is formed by sodium tripolyphosphate and sodium pyrophosphate by mass ratio 7:2 in step S3 gained thick sodium chlorate solution solution, leave...

Embodiment 2

[0038] A kind of preparation method of sodium chlorate of embodiment 2

[0039] A preparation method for sodium chlorate, comprising the following steps:

[0040] S1 Heat the water to 30°C, add salt to the water and stir until the salt in the water is saturated, then filter the salt water through a filter to obtain pure salt water;

[0041] S2 Add deionized water to the pure brine obtained in step S1 to dilute to obtain diluted brine, the volume ratio of the pure brine to deionized water is 5:3;

[0042] S3 adds the diluted brine obtained in step S2 into the electrolytic cell for electrolysis, with graphite as the anode, iron as the cathode, the distance between the poles is 3 millimeters, and the electrolysis temperature is 60° C. to obtain a thick sodium chlorate solution;

[0043] S4 adds the ion chelating agent that is formed by sodium tripolyphosphate and sodium pyrophosphate by mass ratio 9:4 in step S3 gained thick sodium chlorate solution solution, leaves standstill a...

Embodiment 3

[0047] A kind of preparation method of sodium chlorate of embodiment 3

[0048] A preparation method for sodium chlorate, comprising the following steps:

[0049] S1 Heat the water to 25°C, add salt to the water and stir until the salt in the water is saturated, then filter the salt water through a filter to obtain pure salt water;

[0050] S2 Add deionized water to the pure brine obtained in step S1 to dilute to obtain diluted brine, the volume ratio of the pure brine to deionized water is 5:2;

[0051] S3 adds the diluted brine obtained in step S2 into an electrolytic cell for electrolysis, with graphite as the anode and iron as the cathode, with a distance of 3 millimeters between the poles and an electrolysis temperature of 50° C. to obtain a thick sodium chlorate solution;

[0052] S4 adds the ion chelating agent that is formed by sodium tripolyphosphate and sodium pyrophosphate by mass ratio 8:3 in step S3 gained thick sodium chlorate solution solution, leaves standstil...

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Abstract

The invention belongs to the field of chemical industry, and particularly relates to a preparation method of sodium chlorate. The preparation method of sodium chlorate comprises the following steps: firstly dissolving sodium chloride into water to obtain a saturated sodium chloride solution, then carrying out filtering, carrying out diluting, and carrying out electrolyzing to obtain a crude sodiumchlorate solution; adding an ionic chelating agent into the crude sodium chlorate solution, carrying out standing, and carrying out centrifuging to obtain a purified sodium chlorate solution A; adding a hydrochloric acid solution, and removing bromine, chlorate radicals and free chlorine in a bromine removal tower to obtain a purified sodium chlorate solution B; adding sodium hydroxide for neutralizing, carrying out concentrating to obtain a concentrated sodium chlorate solution, finally adding an anti-caking agent, and carrying out crystallizing to obtain sodium chlorate. According to the method, the ionic chelating agent is added in the process of preparing sodium chlorate to remove metal ions in the solution, so that purity of the obtained sodium chlorate is higher; the efficient anti-caking agent is added, so that the defect that sodium chlorate is easily caked in a placing process is overcome, and quality of the sodium chlorate is remarkably improved; and ultrasonic concentrationis adopted, so that energy is saved.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a preparation method of sodium chlorate. Background technique [0002] Sodium chlorate is usually white or yellowish equiaxed crystal, and has many uses: it is used as an oxidizing agent for dyeing fine cloth in the printing and dyeing industry, and can also be used as a mordant. It is used as an oxidizing agent in the inorganic industry, and can also be used in the manufacture of sodium chlorite and perchlorate. In the pharmaceutical industry, it is used in the manufacture of pharmaceutical zinc oxide and sodium dithiosuccinate. The pigment industry is used to manufacture high-grade zinc oxide and Hualan. Agriculturally used as a herbicide. In addition, it is also used in papermaking, leather tanning, ore processing, seawater bromine extraction, printing ink, explosives, etc. With the widespread application of chlorine dioxide, the market demand for sodium chlora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/26
CPCC25B1/265
Inventor 何从权
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