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Method for producing chlorate in different grain diameters by three-section continuous low-temperature vacuum evaporative crystallization

A low-temperature vacuum, evaporative crystallization technology, applied in the direction of evaporative separation crystallization, chlorate, chloric acid, etc., can solve the problems such as the inability to accurately obtain the predetermined chlorate solid, and avoid difficult washing, large particle size, and difficult formation. block effect

Active Publication Date: 2018-03-27
四川集康化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a method for producing chlorate with different particle sizes by three-stage continuous low-temperature vacuum evaporation and crystallization, which is used to solve the problem that the existing layered crystallization method described in the background technology cannot accurately obtain predetermined chloric acid salt solids problem

Method used

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  • Method for producing chlorate in different grain diameters by three-section continuous low-temperature vacuum evaporative crystallization
  • Method for producing chlorate in different grain diameters by three-section continuous low-temperature vacuum evaporative crystallization
  • Method for producing chlorate in different grain diameters by three-section continuous low-temperature vacuum evaporative crystallization

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Embodiment 1

[0039] combined with figure 1 Shown, a kind of three-stage continuous low-temperature vacuum evaporation crystallization produces the method for chlorate of different particle sizes, adopts the following steps to make:

[0040] In this embodiment, the following steps were adopted to prepare sodium chlorate-NaClO3 solids with different particle sizes. The following nine steps are specifically adopted. Of course, it is worth noting that the method recorded in this embodiment is applicable to the preparation of all chlorates, and can receive substantially the same technical effect. The error of the diameter is negligible for industrial applications. The following is specifically described with sodium chlorate:

[0041]Step S100: Low-temperature vacuum evaporation continuous crystallization A, the sodium chlorate electrolyte solution with a concentration of 480g / L-620g / L is continuously crystallized at a temperature of 0.81KPa to 0.86KPa and a temperature of 48-52°C to obtain th...

Embodiment 2

[0072] In order to avoid a small part of sodium chlorate whose particle size is too large or too small to be mixed therein, on the basis of Example 1, further in combination with the attached figure 1 The step, in the present embodiment, in described step S300, sodium chlorate solid is carried out between drying and packing and also includes the step that the sodium chlorate solid after drying is filtered, specifically comprises:

[0073] Step S301, putting the dried sodium chlorate solid into a filter shaker for filtration and screening to obtain sodium chlorate with a particle size greater than 0.2 mm and less than 0.3 mm; meanwhile, obtain sodium chlorate with a particle size less than 0.2 mm and greater than 0.3 mm Sodium chlorate; The vibrating sieve mesh in the described filtration shaker is two layers, and the aperture of the upper strata is 0.3 millimeter, and the aperture of the lower floor is 0.2 millimeter;

[0074] Step S302, sending sodium chlorate with a particle...

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Abstract

The invention discloses a method for producing chlorate in different grain diameters by three-section continuous low-temperature vacuum evaporative crystallization, comprising the following steps: performing low-temperature vacuum evaporative continuous crystallization on A, performing continuous crystallization on a chlorate electrolyte with concentration of 480 / L-620g / L at the pressure of 0.81KPa to 0.86 KPa and the temperature of 48-52 DEG C, so as to obtain an evaporated concentrated crystal-slurry mixture X; then performing centrifugal separation, and drying, then packaging chlorate solids by adopting a full-automatic quantitative packaging machine A to obtain a crude chlorate product A with particle size of greater than 0.2mm. the method has the advantages that the particle size of crystals of chlorate is indirectly controlled by controlling the vacuum degree and different temperatures in the evaporation and crystallization process by adopting a manner of continuous low-temperature vacuum evaporation, so as to prepare the expected chlorate product according to requirement, the use value is high, and products and percent of pass better meeting the requirement can be achieved in comparison with existing layered crystallization.

Description

technical field [0001] The present invention relates to the field of preparation methods of chlorate, in particular to a preparation method for obtaining chlorate with expected particle size, specifically, a three-stage continuous low-temperature vacuum evaporation crystallization method for producing chlorate with different particle sizes . Background technique [0002] At present, the high-vacuum low-temperature evaporation and crystallization process is the key process of chlorate production. Under higher vacuum and lower temperature, the chlorate electrolyte enters the vacuum crystallizer from the bottom, and chlorate is produced by low-temperature evaporation and concentration in a vacuum state. crystals, and form different particle size distributions on different layer heights, the bottom large-grained crystals are used as the product discharge; the middle-sized crystals are drawn from the large circulation pipe into the metastable zone as crystal seeds; the mother liq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B11/14B01D9/02
CPCB01D9/0022C01B11/145
Inventor 朱威张轶周礼代波胡敦普
Owner 四川集康化工有限公司
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