Sphere-like superfine barium nitrate, preparation method and application thereof

A technology of barium nitrate and spherical shape, applied in the direction of calcium/strontium/barium nitrate, explosives, etc., to achieve the effect of solving technical bottlenecks

Pending Publication Date: 2020-12-25
SHANXI BEIHUA GUANLYU CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is no mature ultra...

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  • Sphere-like superfine barium nitrate, preparation method and application thereof
  • Sphere-like superfine barium nitrate, preparation method and application thereof
  • Sphere-like superfine barium nitrate, preparation method and application thereof

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[0023] The invention provides a preparation method of spherical ultrafine barium nitrate, comprising the following steps:

[0024] Under the condition of stirring, the saturated aqueous solution of barium nitrate is added dropwise into the anti-solvent for recrystallization to obtain the spherical ultrafine barium nitrate; the temperature of the saturated aqueous solution of barium nitrate is higher than the temperature of the anti-solvent.

[0025] In the present invention, unless otherwise specified, each component in the preparation method is a commercially available product well known to those skilled in the art.

[0026] In the present invention, under the condition of stirring, the saturated aqueous solution of barium nitrate is added dropwise into the anti-solvent, and the recrystallization is carried out to obtain the spherical ultrafine barium nitrate.

[0027] In the present invention, the preparation method of the saturated aqueous solution of barium nitrate is as f...

Embodiment 1

[0049] 30g of barium nitrate and 150g of water were mixed, and the temperature was raised to 60°C at a rate of 2.0°C / min at a stirring rate of 280rpm to obtain a saturated aqueous solution of barium nitrate;

[0050] Cool down to 0-10°C with 150g of ethanol at a rate of 5°C / min;

[0051] Under the condition that the ethanol is stirred at a rate of 480rpm, the dropping rate is controlled at 6.0g / min, and the saturated aqueous solution of barium nitrate is added dropwise to the ethanol. Under the condition of ℃, the filter cake obtained by filtering is dried, and then the dried product is passed through a 200-mesh sieve, and the under-sieve is the spherical superfine barium nitrate.

Embodiment 2

[0053] 25.65g of barium nitrate and 150g of water were mixed, and the temperature was raised to 50°C at a rate of 1.5°C / min at a stirring rate of 260rpm to obtain a saturated aqueous solution of barium nitrate;

[0054] Cool down to 0-10°C with 150g of ethanol at a rate of 4°C / min;

[0055] Under the condition that the ethanol is stirred at a rate of 460rpm, the dropping rate is controlled at 5.8g / min, and the saturated aqueous solution of barium nitrate is added dropwise to the ethanol. Under the condition of ℃, the filter cake obtained by filtering is dried, and then the dried product is passed through a 200-mesh sieve, and the under-sieve is the spherical superfine barium nitrate.

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Abstract

The invention belongs to the technical field of recrystallization, and particularly relates to sphere-like superfine barium nitrate, a preparation method and application thereof. The invention provides a preparation method of sphere-like superfine barium nitrate, and the method comprises the following steps: under a stirring condition, dropwisely adding a barium nitrate saturated aqueous solutioninto an anti-solvent, and performing recrystallizing to obtain the sphere-like superfine barium nitrate; wherein the temperature of the barium nitrate saturated aqueous solution is higher than that ofthe anti-solvent. The sphere-like superfine barium nitrate obtained by the preparation method provided by the invention has the characteristics that the long axis and the short axis of the crystal form are close to 1 and the median particle size is small, and the technical bottleneck of superfine barium nitrate powder at present is solved. Test results of the embodiment show that the sphere-likesuperfine barium nitrate crystal form obtained by the method provided by the invention has a long-short axis ratio of 1.01-1.04 and a high degree of sphericity; the median particle size is 15.437-17.523microm, and the particle size of the product is small; and the purity is 99.2-99.3%, and the purity is high.

Description

technical field [0001] The invention belongs to the technical field of recrystallization, and in particular relates to a quasi-spherical ultrafine barium nitrate and a preparation method and application thereof. Background technique [0002] After the material is ultrafine, its optical, electrical, magnetic, mechanical, thermodynamic, surface and interface properties will undergo unique changes, and it has a broader application prospect. Ultra-fine barium nitrate powder was obtained by sieving barium nitrate powder, and the obtained ultra-fine barium nitrate was tested and found that the combustion performance of ultra-fine barium nitrate in pyrotechnics, pyrotechnics, smoke screen and combustion, etc. The smoke-forming performance has been greatly improved. [0003] Due to the fast crystallization speed of barium nitrate, it is easy to cause the particle size of the powder product to be coarse. The current barium nitrate powder has a wide particle size distribution and var...

Claims

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Application Information

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IPC IPC(8): C06B31/02C01F11/36
CPCC01F11/36C01P2004/32C01P2004/61C01P2006/80C06B31/02
Inventor 侯会生刘波王庆华申石磊郑红武王坤卫涌樊李瑞王卫星
Owner SHANXI BEIHUA GUANLYU CHEM IND
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