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One-dimensional tubular zeolite with large pore size and preparation method thereof

A large-aperture, tubular technology, applied in the field of large-aperture one-dimensional tubular zeolite and its preparation, can solve the problems of increased adsorption sites and capacity, large space in the tube, and large inner diameter, and achieve multiple contact sites and contact spaces. The effect of reaction rate and mild reaction conditions

Inactive Publication Date: 2016-05-04
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to different surfactants, the pore size of the prepared zeolite is not the same, it is difficult to achieve a uniform shape, and the preparation conditions are harsh, time-consuming, high cost, and easily cause secondary pollution
[0004] One-dimensional tubular zeolite has increased exposure of active sites, large inner diameter, and large space in the tube, thereby increasing the adsorption sites and capacity, which plays a very effective role in adsorption and purification, and the tubular shape has not been reported.

Method used

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  • One-dimensional tubular zeolite with large pore size and preparation method thereof
  • One-dimensional tubular zeolite with large pore size and preparation method thereof
  • One-dimensional tubular zeolite with large pore size and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1) Preparation of purified halloysite: Add 50g of HNT to 1000mL of distilled water, then add 2g of sodium hexametaphosphate as a dispersant, adjust the pH value between 8-9, then ultrasonically disperse for 10 minutes and then stir in a water bath at 60°C for 12 Hours, a HNT suspension was obtained. The suspension was left to stand for 24 hours, the lower solid was discarded, the upper suspension was centrifuged at a speed of 2000 r / min, and the separated solid was placed in an oven and dried at 70°C for 24 hours to obtain purified HNT.

[0028] 2) Preparation of large-pore one-dimensional tubular zeolite: under normal temperature and pressure conditions, grind 1.5g of purified halloysite to a particle size of ≤200 mesh, add 58.5mL of 2wt% sodium hydroxide solution, stir for 20min, and transfer to polytetrafluoroethylene In a hydrothermal tank, conduct a hydrothermal reaction at 100°C for 24 hours. After cooling to room temperature, wash the product repeatedly with dist...

Embodiment 2

[0033] 1) Preparation of purified halloysite: Add 50g of HNT to 1500mL of distilled water, then add 3g of sodium hexametaphosphate as a dispersant, adjust the pH value between 8-9, then ultrasonically disperse for 10 minutes and then stir in a water bath at 60°C for 12 Hours, a HNT suspension was obtained. The suspension was left to stand for 24 hours, the lower solid was discarded, the upper suspension was centrifuged at a speed of 2000 r / min, and the separated solid was placed in an oven and dried at 70°C for 24 hours to obtain purified HNT.

[0034] 2) Preparation of large-pore one-dimensional tubular zeolite: under normal temperature and pressure conditions, grind 1.5g of purified halloysite to a particle size of ≤200 mesh, add it to 60mL of 2wt% sodium hydroxide solution, stir for 20min, and then transfer it to polytetrafluoroethylene water In a hot tank, hydrothermally react at 100°C for 24 hours, after cooling to room temperature, wash the product repeatedly with distil...

Embodiment 3

[0036] 1) Preparation of purified halloysite: Add 50g of HNT to 1500mL of distilled water, then add 3g of sodium hexametaphosphate as a dispersant, adjust the pH value between 8-9, then ultrasonically disperse for 10 minutes and then stir in a water bath at 60°C for 12 Hours, a HNT suspension was obtained. The suspension was left to stand for 24 hours, the lower solid was discarded, the upper suspension was centrifuged at 2000r / min, and the separated solid was placed in an oven and dried at 110°C for 12 hours to obtain purified HNT.

[0037] 2) Preparation of large-pore one-dimensional tubular zeolite: under normal temperature and pressure conditions, grind 1.5g of purified halloysite to a particle size of ≤200 mesh, add 58.5mL of 2wt% sodium hydroxide solution, stir for 20min, and transfer to polytetrafluoroethylene In a hydrothermal tank, conduct a hydrothermal reaction at 110°C for 24 hours. After cooling to room temperature, wash the product repeatedly with distilled water...

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Abstract

The invention relates to large-aperture one-dimensional tubular zeolite and a preparation method thereof. The large-aperture one-dimensional tubular zeolite has a nanometer one-dimensional hollow tube structure, the internal diameter of the large-aperture one-dimensional tubular zeolite is 70-90nm, the tube wall thickness is 15-22nm, and the tube length is 0.65-1 micron. The preparation method of the large-aperture one-dimensional tubular zeolite comprises the following steps: 1) preparing purified halloysite; and 2) preparing the large-aperture one-dimensional tubular zeolite: under the conditions of normal temperature and normal pressure, grinding the purified halloysite until the particle size is less than or equal to 200mesh, adding the ground purified halloysite into a sodium hydroxide solution, uniformly mixing, putting in a hydrothermal reaction kettle, carrying out hydrothermal reaction for 20-24h under the condition with the temperature to be 100-110 DEG C, and then carrying out post-processing to obtain the large-aperture one-dimensional tubular zeolite. The method is simple in step, mild in reaction condition, short in production period, simple in procedure, low in cost and little in secondary pollution and is suitable for scale production.

Description

technical field [0001] The invention relates to the field of inorganic non-metallic materials, in particular to a large-aperture one-dimensional tubular zeolite and a preparation method thereof. Background technique [0002] At present, the problem of excessive fluoride in drinking water has seriously affected the normal life of residents in many parts of the world. More than 20 developed or developing countries have endemic diseases related to fluorine due to excessive fluoride. The World Health Organization (WHO) has given a guideline value for the concentration of fluoride ions in drinking water, and many countries and regions treat drinking water according to this guideline value. For the treatment of fluoride in water, zeolite materials can provide unique chemical reactivity and adsorption selectivity due to their unique reactive sites, and can be used as very effective adsorbents. Zeolite is a porous crystalline solid whose basic structure is TO 4 (T=Al / Si) unit stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/02
CPCC01B39/02C01P2002/72C01P2004/04C01P2004/133
Inventor 田芷涵杨超田熙科周朝昕罗东岳王龙艳陈林枫
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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