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Preparation method of spherical nano-strontium carbonate

A nano-carbonic acid and spherical technology, applied in the direction of strontium carbonate, calcium carbonate/strontium/barium, nanotechnology, etc., can solve the problems of low-end supply capacity excess, irregular strontium industry, structural imbalance, etc., and achieve uniform and spherical particles Good, narrow particle size range

Inactive Publication Date: 2019-11-15
QINGHAI UNIV FOR NATITIES
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although my country has become a major producer of strontium products, and its annual output accounts for about 50% to 60% of the world's output, due to the irregularity of the strontium industry, the structure is seriously unbalanced, and the low-end supply capacity is excessive and the high-end supply capacity is insufficient.

Method used

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  • Preparation method of spherical nano-strontium carbonate
  • Preparation method of spherical nano-strontium carbonate
  • Preparation method of spherical nano-strontium carbonate

Examples

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preparation example Construction

[0025] The invention provides a method for preparing spherical nano-strontium carbonate, see figure 1 , the preparation method comprises the steps of:

[0026] S10. After high-temperature reduction, celestite is dissolved in water at 50° C. to 100° C. and kept at a constant temperature for 2 to 4 hours, and filtered to remove insoluble impurities to obtain a soluble strontium salt solution. Add a crystal form control agent to the strontium salt solution and continue stirring to obtain Clear first solution.

[0027] Specifically, the crystal form control agent is disodium ethylenediaminetetraacetate (EDTA). The molar ratio of the added amount of the crystal form control agent to the strontium ion in the strontium salt solution is 0.4-1.

[0028] S20. Adding a surfactant to the sodium carbonate solution with a mass fraction of 10% to 25% to prepare a second solution.

[0029] Specifically, the surfactant is selected to be cetyltrimethylammonium bromide (CTMAB). The added amo...

Embodiment 1

[0035] (1), dissolve lapis lazuli in water at 85°C after high-temperature reduction and keep it warm for 2 hours to remove insoluble impurities, and add a crystal form control agent (disodium ethylenediaminetetraacetate) to the strontium salt solution at 85°C ), the molar ratio of the amount of the crystal form control agent to the strontium ion in the strontium salt solution is 0.6, and the stirring is continued and mixed to obtain a clear first solution.

[0036] (2), in the sodium carbonate solution that mass fraction is 15%, add cetyl trimethyl ammonium bromide, the cetyl trimethyl ammonium bromide amount that adds is 0.7% of sodium carbonate quality, prepares and forms second solution.

[0037] (3) The first solution and the second solution are respectively injected into a high gravity reactor to carry out a high gravity reaction to obtain a slurry solution. Wherein, the injection flow rate of the first solution is controlled to be 85L / h, the injection flow rate of the s...

Embodiment 2

[0041] (1), dissolve lapis lazuli in water at 95°C after high-temperature reduction and keep it warm for 3.5 hours to remove insoluble impurities, and add a crystal form control agent (disodium ethylenediaminetetraacetate) to the strontium salt solution at 95°C ), the molar ratio of the addition amount of the crystal form control agent to the strontium ion in the strontium salt solution is 1, and the stirring is continued and uniformly mixed to obtain a clear first solution.

[0042] (2), in the sodium carbonate solution that mass fraction is 25%, add cetyl trimethyl ammonium bromide, the cetyl trimethyl ammonium bromide amount that adds is 1% of the quality of sodium carbonate, prepares and forms second solution.

[0043] (3) The first solution and the second solution are respectively injected into a high gravity reactor to carry out a high gravity reaction to obtain a suspension solution. Wherein, the injection flow rate of the first solution is controlled to be 110 L / h, th...

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Abstract

The invention discloses a preparation method of spherical nano-strontium carbonate. The method includes the steps of: S10. subjecting celestite to high temperature reduction, then dissolving the reduced celestite in water at 50DEG C-100DEG C and maintaining a constant temperature for 2-4h, filtering out insoluble impurities to obtain a soluble strontium salt solution, adding a crystal form controlagent into the strontium salt solution and performing stirring continuously to obtain a clarified first solution; S20. adding a surfactant into a sodium carbonate solution with a mass fraction of 10%-25% to prepare a second solution; S30. injecting a first solution and a second solution respectively into a hypergravity reactor for hypergravity reaction to obtain a slurry solution; and S40. subjecting the slurry solution to solid-liquid separation to obtain a solid product, and washing and drying the solid product to obtain spherical nano-strontium carbonate. The method provided by the invention can prepare spherical nano-strontium carbonate with good spherical effect, uniform particles and narrow particle size range.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a method for preparing spherical nanometer strontium carbonate. 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 supply capacity and insuffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18B82Y40/00
CPCB82Y40/00C01F11/187C01P2002/72C01P2004/03C01P2004/32
Inventor 金建华姜小萍刘明地
Owner QINGHAI UNIV FOR NATITIES
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