A kind of mordenite with diatomite morphology and its preparation method

A pore structure, mordenite technology, applied in the direction of mordenite crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., can solve the problems of slow diffusion of adsorbate, high cost, insignificant adsorption speed, etc., and achieve potential environmental hazards. The effect of low cost and energy consumption, efficient adsorption capacity

Active Publication Date: 2017-01-25
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the template used in the preparation of the above-mentioned mesoporous / microporous mordenite is not only difficult to prepare, but also expensive
In addition, the mesopore size is small, and the adsorbate diffuses slowly on its surface, resulting in an insignificant increase in the adsorption rate.
Based on the above problems, large-scale industrial application of mesoporous / microporous mordenite is relatively difficult, and its preparation method is difficult to popularize and apply

Method used

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  • A kind of mordenite with diatomite morphology and its preparation method
  • A kind of mordenite with diatomite morphology and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0026] 1. Add 1g of Jilin diatomaceous earth (the main diatom species of which is diatoms) to 5mL of furfuryl alcohol; heat to 95°C after thorough stirring and keep for 2 hours; place the obtained product under nitrogen atmosphere, The temperature was raised to 550° C., calcined for 2 hours, cooled and ground to obtain a ground solid.

[0027] 2. Add 1 g of the ground solid obtained above into 20 mL of 0.15 mol / L sodium hydroxide aqueous solution. After thorough stirring, the temperature was raised to 50°C and kept for 4 hours, then the obtained mixed solution was placed in a hydrothermal device, and the temperature was raised to 190°C and kept for 16 hours to obtain a suspension.

[0028] 3. Centrifuge the above suspension, and heat the obtained solid particles to 450° C. under air condition for 3 hours to obtain the hierarchical pore structure mordenite with diatomite morphology of this embodiment.

[0029] The above-mentioned hierarchical pore structure mordenite with diat...

Embodiment 2

[0032] Add 1g of Jilin diatomaceous earth (the main diatom species of which is diatoms) to 10mL of furfuryl alcohol; heat to 180°C after thorough stirring and keep for 1 hour; place the obtained product under an argon atmosphere and heat up Calcined at 700° C. for 4 hours, cooled and ground the obtained solid to obtain the ground solid. Add 1 g of the ground solid to 10 mL of 0.30 mol / L sodium hydroxide aqueous solution. After thorough stirring, the temperature was raised to 90°C and kept for 6 hours, then the obtained mixed solution was placed in a hydrothermal device, and the temperature was raised to 150°C and kept for 24 hours to obtain a suspension. The obtained suspension was subjected to centrifugation, and the obtained solid particles were heated to 600° C. under air condition and kept for 5 hours to obtain the hierarchical pore structure mordenite with diatomaceous earth morphology of this embodiment.

[0033] As an implementation application, the ability of this hie...

Embodiment 3

[0035]Add 1g of Jilin diatomaceous earth (the main diatom species of which is diatoms) to 8mL furfuryl alcohol; heat to 150°C after thorough stirring and keep for 1.5 hours; place the obtained product under a helium atmosphere and heat up Calcined at 600° C. for 3 hours, cooled and ground the obtained solid to obtain the ground solid. Add 1 g of the ground solid to 15 mL of 0.20 mol / L sodium hydroxide aqueous solution. After thorough stirring, the temperature was raised to 90°C and kept for 6 hours, then the obtained mixed solution was placed in a hydrothermal device, and the temperature was raised to 170°C and kept for 20 hours to obtain a suspension. The obtained suspension was subjected to centrifugation, and the obtained solid particles were heated to 500° C. under air condition and kept for 4 hours, so that the hierarchical pore structure mordenite with diatomite morphology of this embodiment was obtained.

[0036] As an implementation application, the ability to adsorb ...

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Abstract

The present invention discloses mordenite having diatomite morphology and a multi-level pore channel structure, and a preparation method thereof. According to the present invention, cheap diatomite having an unique macroporous structure is adopted as a zeolite preparation template and a silicon / aluminum source, and during the preparation process, a diatomite-porous carbon intermediate is prepared, and then porous carbon is adopted as a template and diatomite is adopted as a silicon source and an aluminum source to prepare the porous mordenite having the diatomite morphology and the large / micro pores. According to the present invention, the obtained mordenite has the diatomite morphology and further has the high macroporosity so as to provide the multi-level pore channel structure, such that the efficient adsorption is provided; and compared with the mordenite processes through other template methods, the method of the present invention has characteristics of simple process and low potential environment hazard.

Description

[0001] Technical field: [0002] The invention belongs to the field of mordenite preparation, and in particular relates to a multi-level pore structure mordenite with diatomite morphology and a preparation method thereof. [0003] Background technique: [0004] Zeolite has the characteristics of rich pore structure, large specific surface area, high microporosity, high thermal stability, and environmental friendliness, so it is widely used in industrial fields such as adsorption, catalysis, and loading (Yang Shidong, 2004). Mordenite is characterized by its unique microporous structure (pore diameter ~0.66nm), large specific surface area (≥160m 2 / g) and high silicon-aluminum ratio (usually >8, Gao Haozhong, 1990) are widely used in catalysis and adsorption and separation of organic matter, especially the purification treatment of organic pollutants (Wang Huanying et al., 2012). Due to the problems of poor structural uniformity and high impurity content of natural mordenite...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/26
Inventor 刘冬袁鹏袁巍巍刘红梅邓亮亮杜培鑫何宏平
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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