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Method for synthesizing nanometer kaolin by using muscovite powder

A technology of muscovite powder and kaolinite, which is applied in the preparation of alkali metal nitrate, aluminum silicate, silicate, etc., can solve the problems of complicated production process, expensive potassium chloride, dangerous and explosive ammonium nitrate, etc. Achieve high resource utilization, good economic benefits and application prospects, and low cost

Active Publication Date: 2018-01-12
昊青薪材(北京)技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, potassium nitrate in my country is basically produced from potassium chloride, sodium nitrate or ammonium nitrate. The main methods include absorption method, extraction method, ion exchange method and double decomposition method. The main problems are that potassium chloride is expensive and production The process is complicated, and ammonium nitrate is a dangerous and explosive substance, etc.

Method used

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  • Method for synthesizing nanometer kaolin by using muscovite powder
  • Method for synthesizing nanometer kaolin by using muscovite powder
  • Method for synthesizing nanometer kaolin by using muscovite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Accurately take by weighing 6 g of muscovite powder (chemical composition analysis results are shown in Table 1), first the mass concentration of nitric acid is 65 ~ 68wt% nitric acid diluted with distilled water to a concentration of 1.5mol / kg, the mass concentration of muscovite powder and nitric acid solution Ratio 1:50, mixed and stirred evenly, put into a stainless steel reactor with polytetrafluoroethylene lining, hydrothermally reacted at 250°C for 24 hours, immediately took out the reactor and put it in cold water for rapid cooling, and solidified after the kettle was opened. The liquid is separated, and the filtrate is evaporated and crystallized at 110-120°C to obtain the potassium nitrate product. Test for K in Potassium Nitrate 2 The O content is 45.23%, and the purity of potassium nitrate equivalent is greater than 97%. The dissolution rate of potassium oxide measured by ICP was 98%. The filter cake is washed with distilled water until the pH of the filtr...

Embodiment 2

[0030] Accurately take by weighing 6 g of muscovite powder (chemical composition analysis results are shown in Table 1), first the mass concentration of nitric acid is 65 ~ 68wt% nitric acid diluted with distilled water to a concentration of 0.9mol / kg, the mass concentration of muscovite powder and nitric acid solution Ratio 1:25, mixed and stirred evenly, put into a stainless steel reactor with polytetrafluoroethylene liner, hydrothermally reacted at 250°C for 24 hours, immediately took out the reactor and put it in cold water for rapid cooling, and solidified after opening the kettle. The liquid is separated, and the filtrate is evaporated and crystallized at 110-120°C to obtain potassium nitrate to test the K in potassium nitrate 2 The O content is 45.19%, and the purity of potassium nitrate equivalent is greater than 97%. The dissolution rate of potassium oxide measured by ICP was 98%. The filter cake is washed with distilled water until the pH of the filtrate is 9-10, an...

Embodiment 3

[0032] Accurately take by weighing 6 g of muscovite powder (chemical composition analysis results are shown in Table 1), first the mass concentration of nitric acid is 65 ~ 68wt% nitric acid diluted with distilled water to a concentration of 1.2mol / kg, the mass concentration of muscovite powder and nitric acid solution Ratio 1:25, mixed and stirred evenly, put into a stainless steel reactor with polytetrafluoroethylene liner, hydrothermally reacted at 250°C for 24 hours, immediately took out the reactor and put it in cold water for rapid cooling, and solidified after opening the kettle. The liquid is separated, and the filtrate is evaporated and crystallized at 110-120°C to obtain the potassium nitrate product, and the K in the potassium nitrate is tested. 2 The O content is 45.43%, and the purity of potassium nitrate equivalent is greater than 97%. The dissolution rate of potassium oxide measured by ICP was 98%. The filter cake is washed with distilled water until the pH of ...

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Abstract

The invention relates to a method for synthesizing nanometer kaolin by using muscovite powder. The method comprises the following steps of mixing the muscovite powder and a nitrate solution, performing hydrothermal reaction for 12 to 72h at the temperature of 210 to 260 DEG C, filtering, washing, and drying the obtained solid-phase product at the temperature of 100+ / -5 DEG C, so as to obtain the nanometer kaolin, wherein the liquid-phase product, namely the potassium nitrate solution, can be used for producing the potassium nitrate. The method has the advantages that the muscovite powder and the nitrate are used as raw materials to synthesize the nanometer kaolin, the byproduct is potassium nitrate, and the potassium, aluminum and silicon components in the muscovite are fully utilized; thewhole process technology is simple, the modern industrial requirements of high-efficiency, energy-saving and clean production with 100% of utilization rate of resources and zero emission of three wastes can be met, and the industrialized production can be easily realized.

Description

technical field [0001] The invention belongs to the technical field of preparation of fine chemical materials, and in particular relates to a method for preparing nano kaolinite by using muscovite powder. Background technique [0002] Kaolinite is a triclinic crystal system with a space group of a 0 =0.514nm,b 0 = 0.893nm, c 0 =0.737nm, α=91.8°, β=104.7°, γ==90°, theoretical chemical composition (w B %): Al 2 o 3 41.2%, SiO 2 48.0%, H 2 O10.8%. Its structural unit layer is composed of Si-O tetrahedral layer and Al-(O, OH) octahedral layer connected to each other and stacked along the c-axis, and there are many types of kaolinite minerals. Including kaolinite, dikaiite, pearlite, b-axis disordered kaolinite, Halloysite, kaolinite etc. Kaolinite has strong chemical stability, strong covering ability, good rheological properties, and high whiteness, and can be used in the coating industry. At the same time, it can also exhibit special optical effects and certai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/26C01D9/04
Inventor 原江燕马鸿文姚文贵常倩倩
Owner 昊青薪材(北京)技术有限公司
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