Preparation method of spherical strontium carbonate

A strontium carbonate and spherical technology is applied in the field of preparation of spherical strontium carbonate, which can solve the problems of high cost, inability to achieve large-scale production, and high equipment cost, and achieve the effects of low cost, wide source of production raw materials, and improved yield.

Active Publication Date: 2015-08-26
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The above studies can obtain spherical strontium carbonate through different methods, but most of them use high-purity strontium salt as raw material, resulti

Method used

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  • Preparation method of spherical strontium carbonate
  • Preparation method of spherical strontium carbonate
  • Preparation method of spherical strontium carbonate

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preparation example Construction

[0028] refer to figure 1 , the preparation method according to the spherical strontium carbonate of embodiment 1 of the present invention comprises the steps:

[0029] In step 110, industrial strontium carbonate is calcined to obtain strontium oxide clinker.

[0030] Specifically, 25g of industrial strontium carbonate (the content of strontium carbonate is about 95%) was weighed, placed in a high-temperature calciner and calcined at 1250° C. for 0.5 h to obtain strontium oxide clinker.

[0031] In step 120, the strontium oxide clinker is dissolved in water to obtain strontium hydroxide slurry, and the strontium hydroxide slurry is boiled, filtered, cooled and crystallized to obtain crude strontium hydroxide.

[0032] Specifically, slowly add the strontium oxide clinker obtained in step 110 into water according to the solid-to-liquid mass ratio of 1:10, and stir while adding, and obtain strontium hydroxide slurry after the leaching reaction continues for 30 minutes; The stron...

Embodiment 2

[0043] In the description of Embodiment 2, the similarities with Embodiment 1 will not be repeated here, and only the differences with Embodiment 1 will be described. The difference between embodiment 2 and embodiment 1 is that in step 110, the calcination temperature of industrial strontium carbonate is 1250°C, and the calcination time is 1h to obtain strontium oxide clinker; in step 120, the solid-liquid mass ratio Add water to the strontium oxide clinker under the condition of 1:12, boil it after leaching for 30 minutes, obtain the crude product of strontium hydroxide through hot filtration, cooling and crystallization; in step 130, the crude product of strontium hydroxide is dissolved three times Crystallization obtains strontium hydroxide, and by strontium hydroxide preparation mass concentration is the strontium hydroxide aqueous solution of 4%; In step 140, in the strontium hydroxide aqueous solution, add 27.84g edetate disodium and 19.94g hexahydrate chlorine Strontium...

Embodiment 3

[0046] In the description of Embodiment 3, the similarities with Embodiment 1 will not be repeated here, and only the differences with Embodiment 1 will be described. The difference between embodiment 3 and embodiment 1 is that in step 110, the calcination temperature of industrial strontium carbonate is 1200°C, and the calcination time is 1.5h to obtain strontium oxide clinker; Add water to the strontium oxide clinker at a ratio of 1:15, boil it after leaching for 30 minutes, heat filter, cool and crystallize to obtain the crude product of strontium hydroxide; in step 130, the crude product of strontium hydroxide is dissolved three times- Recrystallization obtains strontium hydroxide, and by strontium hydroxide preparation mass concentration is the strontium hydroxide aqueous solution of 6%; In step 140, in the strontium hydroxide aqueous solution, add 55.40g edetate disodium and 39.68g chloride Strontium is used as a composite morphology agent, so that the amount of strontiu...

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Abstract

The invention discloses a preparation method of spherical strontium carbonate. The preparation method comprises the following steps: A, preparing a strontium hydroxide aqueous solution with a mass percentage of 2-10 percent and adding a composite morphology agent into the strontium hydroxide aqueous solution to form a mixed system; B, adding a carbonizing agent into the mixed system at a temperature of 20-90 DEG C till the pH is 7-7.5 to obtain strontium carbonate slurry; C, performing solid-liquid separation on the strontium carbonate slurry to obtain a filter cake and a filtrate, and washing and drying the filter cake to obtain the spherical strontium carbonate. According to the preparation method of the spherical strontium carbonate, disclosed by the invention, the yield can be greatly improved, the manufacturing cost can be reduced, and meanwhile, an ordinary gas-liquid reactor is used in the preparation process; a product obtained by preparation reaches high-purity indicators, and meanwhile, the micro-topography of the product is in the shape of a sphere of which the average particle size does not exceed 1 micron, so that the performance requirements of the high-purity spherical strontium carbonate used as an electronic component are satisfied.

Description

technical field [0001] The invention belongs to the technical field of inorganic salt synthesis, and in particular relates to a preparation method of spherical strontium carbonate. Background technique [0002] Strontium carbonate is the most important strontium salt product, and it is also an intermediate compound or raw material for preparing other strontium products. It has unique physical and chemical properties, so it is widely used in the production of electronic ceramics, magnetic materials, pyrotechnics, superconducting materials, optical glass, and plasma TVs. In recent years, with the advancement of science and technology, my country's industrial strontium carbonate industry has been greatly developed, and at the same time, the demand for high-purity strontium carbonate products with high added value is also increasing year by year. However, there is still a large gap between my country and developed countries in the deep processing technology of strontium carbona...

Claims

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Application Information

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IPC IPC(8): C01F11/18
Inventor 邹兴武段东平王树轩祁米香李波杨占寿
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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