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Porous kalsilite and preparation method thereof

A technology for potassium nepheline and palygorskite, which is applied in the field of porous hexagonal potassium nepheline and its preparation, and achieves the effect of enhancing application efficiency and facilitating diffusion

Inactive Publication Date: 2017-06-13
CENT & SOUTHERN CHINA MUNICIPAL ENG DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current methods for preparing kalephine mainly include ion exchange, solid phase transition, sol-gel and hydrothermal method, but the products prepared so far are all products with ultra-micropore structure

Method used

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  • Porous kalsilite and preparation method thereof
  • Porous kalsilite and preparation method thereof
  • Porous kalsilite and preparation method thereof

Examples

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preparation example Construction

[0014] One aspect of the present invention provides a kind of preparation method of hexagonal kalephine, comprising the steps of:

[0015] S1. Take palygorskite and put it into hydrochloric acid for activation for 2-12 hours, then wash with pure water, dry and grind to obtain substance A for later use;

[0016] Preferably, in step S1, 1-2 g of palygorskite is added per 10 ml of water;

[0017] Preferably, in step S1, the particle size of palygorskite selected is not less than 200 mesh;

[0018] Preferably, in step S1, the hydrochloric acid concentration is 6-8 mol / L;

[0019] S2. Add 2 to 3 g of aluminum nitrate per 20 ml of water, stir evenly, and then add potassium hydroxide or a mixture of potassium hydroxide and sodium hydroxide to make OH in the solution - The concentration is 10-12mol / L, and stirred evenly at room temperature to obtain solution B, then take 1-1.5g of substance A into solution B, stir evenly, and obtain substance C for later use;

[0020] Preferably, i...

Embodiment 1

[0027] S1. Take 10 g of palygorskite with a particle size of 200 mesh and put it into 100 mL of hydrochloric acid with a concentration of 6 mol / L to activate for 12 hours, then wash it with deionized water until there is no chloride ion, dry it at 60 ° C, grind it, and obtain the substance A for use;

[0028] S2. Dissolve 2g of aluminum nitrate in 20ml of water, stir evenly, add 5.6g of potassium hydroxide, and stir evenly at room temperature to obtain solution B, then take 1g of substance A and put it into solution B, stir evenly to obtain substance C spare;

[0029] S3. Put the obtained substance C into a hydrothermal reaction kettle, react at 160°C for 72h, cool to room temperature, centrifuge at a speed of 4000 rpm, wash with pure water, and dry at 60°C to obtain porous hexagonal nephrite .

Embodiment 2

[0031] S1. Take 30 g of palygorskite with a particle size of 300 mesh and put it into 150 mL of hydrochloric acid with a concentration of 8 mol / L for activation for 10 hours, then wash it with deionized water until there is no chloride ion, dry it at 60 ° C, grind it, and obtain substance A for use;

[0032] S2. Dissolve 3g of aluminum nitrate in 20mL of water, stir evenly, add 2.8g of potassium hydroxide and 2g of sodium hydroxide, and stir evenly at room temperature to obtain solution B, then take 1.1g of substance A and put it into solution B, Stir evenly to obtain substance C for later use;

[0033] S3. Put the obtained substance C into a hydrothermal reaction kettle, react at 160°C for 12h, cool to room temperature, centrifuge at a speed of 4000 rpm, wash with pure water, and dry at 60°C to obtain porous hexagonal nephrite .

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Abstract

A preparation method of porous kalsilite comprises the following steps: S1, taking palygorskite, placing the palygorskite into hydrochloric acid, activating, then washing, drying, and grinding to obtain a material A; S2, adding 2-3 g of aluminum nitrate to each 20 ml of water, stirring evenly, adding potassium hydroxide or a mixture of potassium hydroxide and sodium hydroxide, making the concentration of OH<-> in the solution be 10-12 mol / L, stirring evenly, to obtain a solution B, then taking 1-1.5 g of the material A and placing into the solution B, and stirring evenly, to obtain a material C for standby application; and S3, placing the obtained material C into a hydrothermal reaction kettle, carrying out a reaction for 3-72 h under a condition of the temperature of 160-220 DEG C, cooling to room temperature, centrifuging, washing and drying to obtain the porous kalsilite. The preparation method has the advantages that the acid-activated palygorskite is used as the raw material, and SiO2 in the palygorskite is effectively utilized as a silicon source, so the application of the palygorskite is widened. At the same time, the kalsilite prepared through the method is porous, thereby being conducive to diffusion of reactants and products.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials, in particular to a porous hexagonal kacryptite and a preparation method thereof. Background technique [0002] Potassium nepheline is a kind of potassium-rich feldspar with a framework structure composed of silicon-aluminum tetrahedrons. It has an ultra-micro-pore structure (about 0.3nm) and a stable structure. The active component potassium ions are in its channels. Therefore, it has the characteristics of high temperature resistance and difficult loss of potassium ions, and is a kind of better solid catalyst. It is often used in the fields of hydrocarbon steam reforming to hydrogen production, ethylbenzene dehydrogenation to styrene and ammonia production, ceramics, automobile exhaust purification, etc. It is a kind of inorganic non-metallic material with great potential. However, the ultramicropores are narrow, which is not conducive to the diffusion of reactants and ...

Claims

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Application Information

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IPC IPC(8): C01B33/26
CPCC01B33/26C01P2002/72C01P2004/03C01P2004/22
Inventor 贺珊珊田熙科陈才高李树苑姜应和刘海燕
Owner CENT & SOUTHERN CHINA MUNICIPAL ENG DESIGN & RES INST
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