Spherical nano strontium carbonate and preparation method thereof

A nano-carbonic acid, spherical technology, applied in calcium carbonate/strontium/barium, nanotechnology, nanotechnology and other directions, can solve problems such as environmental pollution, inability to produce high-quality strontium carbonate, etc., to reduce production costs, good dispersibility, preparation The effect of simple process technology

Inactive Publication Date: 2014-09-03
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon reduction process in the prior art produces industrial-grade strontium carbonate, which cannot produce high-quality strontium carbonate and causes serious environmental pollution

Method used

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  • Spherical nano strontium carbonate and preparation method thereof
  • Spherical nano strontium carbonate and preparation method thereof
  • Spherical nano strontium carbonate and preparation method thereof

Examples

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preparation example Construction

[0033] refer to figure 1 , the preparation method of the spherical nano-strontium carbonate provided in this specific embodiment comprises steps:

[0034] S101. Add a topography agent to the soluble strontium salt solution and stir to dissolve to obtain a first solution; wherein, the molar ratio of the topography agent added to strontium ions in the strontium salt solution is 2:1˜1.5. Wherein, when the morphology agent is added to the soluble strontium salt solution, the mixed solution is heated to 50-80° C., so as to speed up the dissolution time of the mixed solution and prevent the crystallization of strontium hydroxide. Wherein, the profile agent is disodium ethylenediaminetetraacetic acid (EDTA).

[0035] S102, transfer the first solution into the ultrasonic reactor, and pass CO into the ultrasonic reactor 2 Gas until the pH of the solution is 5-9 to obtain the second solution; wherein, CO 2 The gas flow rate is 2-10L / min. Among them, the CO 2 A more preferable range...

Embodiment 1

[0041] 1. Add 600ml of yellow water into a 900ml beaker, heat to 60°C, and stir to dissolve with magnetic force. After the dissolution is complete, add 200g of EDTA, continue to stir and dissolve, and obtain the raw material solution after the dissolution is complete. Among them: the molar ratio of total strontium content in yellow water (strontium sulfide, strontium hydrosulfide and strontium hydroxide) to EDTA is 2:1.

[0042] 2. Pour the obtained raw material solution into the ultrasonic reactor, the ultrasonic frequency is 100KHz, and the ultrasonic temperature is 60°C; carbon dioxide is introduced for carbonization, the flow rate of carbon dioxide is 2L / min, and the pH value of the solution is 6 after carbonization for 20 minutes, stop Carbonization gives a suspension. Wherein, the carbon dioxide gas flow also plays a stirring role during the carbonization, which can better control the morphology of the generated spherical nano-strontium carbonate.

[0043] 3. The suspen...

Embodiment 2

[0047] 1. Add 500ml of yellow water into a 900ml beaker, heat to 80°C, and stir to dissolve with magnetic force. After the dissolution is complete, add 180g of EDTA, continue to stir and dissolve, and obtain the raw material solution after the dissolution is complete. Among them: the molar ratio of the total strontium content in yellow water (strontium sulfide, strontium hydrosulfide and strontium hydroxide) to EDTA is 2:1.5.

[0048] 2. Pour the obtained raw material solution into the ultrasonic reactor, the ultrasonic frequency is 80KHz, and the ultrasonic temperature is 40°C; carbon dioxide is passed through for carbonization, the flow rate of carbon dioxide is 4L / min, and the pH value of the solution is 7 after carbonization for 13 minutes, stop Carbonization gives a suspension. Wherein, the carbon dioxide gas flow also plays a stirring role during the carbonization, which can better control the morphology of the generated spherical nano-strontium carbonate.

[0049] 3. T...

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Abstract

The invention discloses a preparation method of spherical nano strontium carbonate, which comprises the following steps: S101. adding a shape agent into a soluble strontium salt solution, and dissolving by stirring to obtain a first solution, wherein the mole ratio of the shape agent to the strontium ions in the strontium salt solution is 2:(1-1.5); S102. transferring the first solution into the ultrasonic reactor, and introducing CO2 gas in the ultrasonic process until the pH value of the solution is neutral, thereby obtaining a second solution, wherein the flow rate of the introduced CO2 gas is 2-10 L/minute; S103. carrying out solid-liquid separation on the second solution to obtain a solid product; and S104. washing the solid product, and drying to obtain the spherical nano strontium carbonate. The invention also discloses the spherical nano strontium carbonate prepared by the preparation method.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a spherical nanometer strontium carbonate and a preparation method thereof. Background technique [0002] Strontium carbonate is an important chemical raw material. Because of its strong absorption of X-rays and γ-rays and other unique physical and chemical properties, it is widely used in color picture tube glass bulbs, cathode ray tubes, electronic ceramics, magnetic The manufacture of materials, fuels, paints and other industrial supplies involves electronics, chemical industry, military industry, building materials, non-ferrous metals, aerospace, light industry, medicine, food and many other industries. Although my country has become a major producer of strontium products, with an annual output accounting for 50% to 60% of the world's output, due to the irregularity of the strontium industry, the structure is seriously unbalanced, with excess low-end sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18B82Y40/00B82Y30/00
Inventor 杨占寿金建华李波王舒娅祁米香邹兴武尤志刚
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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