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Preparation method of anhydrous lithium tetraborate

A technology of anhydrous lithium tetraborate and boron compounds, applied in borates, chemical instruments and methods, inorganic chemistry, etc., to achieve the effects of low energy consumption, convenient large-scale industrial implementation, and simple operation

Inactive Publication Date: 2018-11-30
SHANGHAI CHINA LITHIUM INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] There is no report on the preparation of anhydrous lithium tetraborate by solid phase reaction in the prior art

Method used

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  • Preparation method of anhydrous lithium tetraborate
  • Preparation method of anhydrous lithium tetraborate
  • Preparation method of anhydrous lithium tetraborate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The fine powder lithium carbonate used in this embodiment has a content of 99.9%; boric acid is analytically pure and has a content of 99.9%.

[0026] (1) Add 7407g of 99.9% lithium carbonate to the 1000L stainless steel double cone mixer;

[0027] (2) Add 25000g of analytical pure boric acid to the stainless steel double cone mixer;

[0028] (3) Close the valves of the double cone, open the double cone speed regulator to start mixing the raw materials, control the rotation speed to 50 revolutions / min, and the mixing time to 120 minutes. After mixing, place the mixture evenly in 10 stainless steel plates. , That is, put 3240g of mixture in each stainless steel pan;

[0029] (4) Put 10 stainless steel pans in a high temperature oven, and control the heating rate of the oven to 10°C / min. When the temperature reaches 200°C, stop the temperature rise and maintain 200°C for 4 hours, then 10°C / min After 3 hours after heating to maintain 500℃, close the oven and cool to room temperat...

Embodiment 2

[0036] The micropowder lithium hydroxide monohydrate used in this example is 99.5%; boric acid is analytically pure, with a content of 99.5%.

[0037] (1) Add 42.17kg of 99.5% micropowder monohydrate lithium hydroxide into the 1000L stainless steel double cone mixer;

[0038] (2) Add 130kg of analytical pure boric acid to the stainless steel double cone mixer;

[0039] (3) Close the valves of the double cone, open the double cone governor to start mixing the raw materials, control the rotation speed to 30 revolutions / min, and the mixing time to 150 minutes. After mixing, place the mixture evenly in 20 stainless steel plates. , That is, 8.6085kg of mixed material is placed in each stainless steel pan;

[0040] (4) Put 8 stainless steel pans in a high-temperature oven, and control the heating rate of the oven to 5°C / min. When the temperature reaches 250°C, stop the temperature rise, and maintain 250°C for 3h, and then use 5°C / min. Min heating up to 500℃, stop heating, after maintaining...

Embodiment 3

[0046] The raw materials used in this example are 99.9% finely powdered lithium carbonate and analytically pure boron oxide with a content of 99.5%.

[0047] (1) Add 370.37kg of 99.9% lithium carbonate to the 1000L stainless steel double cone mixer;

[0048] (2) Add 710kg of analytically pure boron oxide to the stainless steel double cone mixer;

[0049] (3) Close the valves of the double cone, open the double cone speed regulator to start mixing the raw materials, control the rotation speed to 20 revolutions / min, and the mixing time to 200 min. After mixing, place the mixture in batches and evenly in the stainless steel plate. , Put 12kg of mixture in each stainless steel pan;

[0050] (4) Put 8 stainless steel pans in a high-temperature oven, and control the heating rate of the oven to be 3℃ / min. When the temperature reaches 240℃, stop the heating, and maintain 240℃ for 3h, then 3℃ / min. Min heating up to 500℃, stop heating, maintain 500℃ for 4h, turn off the oven, and cool to room ...

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Abstract

The invention discloses a preparation method of anhydrous lithium tetraborate. The preparation method comprises the following steps: mixing at least one lithium-containing compound and at least one boron-containing compound according to a reaction ratio to obtain a mixture of lithium and boron; carrying out solid-phase reaction to obtain the anhydrous lithium tetraborate, wherein the lithium-containing compound contains an oxygen element and the boron-containing compound contains an oxygen element. According to the preparation method disclosed by the invention, the anhydrous lithium tetraborate is prepared by adopting solid-phase reaction, so that a solid-state lithium source and a solid-state boron source are used as raw materials; in a preparation process, liquid-phase raw materials areavoided; the preparation method is simple to operate, has relatively low energy consumption and is convenient for industrial large-scale implementation.

Description

Technical field [0001] The invention relates to the field of preparation of anhydrous lithium tetraborate, in particular to a solid-phase synthesis method of anhydrous lithium tetraborate. Background technique [0002] As an important inorganic material, anhydrous lithium tetraborate is mainly used as a co-solvent in X-ray fluorescence analysis. It is widely used in cement plants and steel plants for analysis; as a component of glaze and grease in the enamel industry; Metal smelting, enamel manufacturing, etc. At present, anhydrous lithium tetraborate is usually produced by the process of reacting and then drying boric acid and lithium hydroxide solution, which has a long production cycle and high energy consumption. [0003] Ji Donghai describes a method for preparing high-purity and high-density lithium tetraborate in his patent (patent number CN102838125A). In this process, lithium hydroxide is first dissolved in boiling water and filtered to remove impurities to obtain recryst...

Claims

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Application Information

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IPC IPC(8): C01B35/12
CPCC01B35/121
Inventor 魏述彬
Owner SHANGHAI CHINA LITHIUM INDAL
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