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Synthesis method of mesoporous zeolite

A mesoporous zeolite and zeolite technology, applied in the field of synthetic mesoporous zeolite, can solve the problems of uneven mesoporous distribution, wide pore size distribution range, and large destructive crystal structure, and achieve excellent performance and narrow pore size distribution range.

Active Publication Date: 2017-01-04
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, zeolite crystals can also produce some mesoporous pores through post-treatment methods such as acid treatment or alkali treatment, but the mesoporous zeolite prepared by the post-treatment method is more destructive to the crystal structure and has a wider range of pore sizes.
[0004] The mesoporous zeolite prepared in the prior art has a large mesoporous diameter, a wide range of pore size distribution, and uneven mesoporous pores. For example, the mesoporous size of a zeolite prepared with carbon sol and polymer sol as a structural template is about 7-25 Å. Nano, the mesopore size of the zeolite prepared with carbon nanotubes or carbon nanofibers as a structural template is about 12-40 nanometers, and the mesopore size of the zeolite obtained by the alkali post-treatment method is about 5-35 nanometers (Y.Tao et al. al., Chem. Rev. 2006, 106, 896-910)

Method used

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  • Synthesis method of mesoporous zeolite

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Experimental program
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Effect test

Embodiment 1

[0033] Weigh 25 mg of SWCNHs and add it into ethanol for ultrasonic dispersion. In another reaction vessel was added 16mg NaOH, 4mL H 2 O and 1.2mL TPAOH, stirred by magnetic force, poured the dispersed SWCNHs into the reaction solution, stirred continuously to volatilize the ethanol until the ethanol was completely volatilized, then added 1.117mL TEOS. Stir at room temperature, age for 10 h, then transfer the reaction mixture into a polytetrafluoroethylene-lined hydrothermal reactor, and perform hydrothermal synthesis reaction at 150° C. for 5 days. After the completion of the synthesis reaction, centrifugation, washing, drying, and finally calcination at 600 ° C to remove SWCNHs to obtain Silicate-1 zeolite containing mesoporous.

Embodiment 2

[0035] Weigh 100mg of SWCNHs into ethanol and ultrasonically disperse. In another reaction vessel was added 4 mL of H 2 O and 1.2mL TPAOH, magnetically stirred, poured the dispersed SWCNHs into the reaction solution, and kept stirring to volatilize the ethanol until the ethanol was completely volatilized, then added 1.117mL TEOS. Stir at room temperature, age for 10 h, transfer the reaction mixture into a polytetrafluoroethylene-lined reactor, and perform hydrothermal synthesis at 180° C. for 2 days. After the synthesis reaction is finished, it is centrifuged, washed, dried, and finally calcined at 600° C. to remove SWCNHs to obtain Silicate-1 zeolite containing mesoporous pores.

Embodiment 3

[0037] Weigh 50mg of SWCNHs into ethanol and ultrasonically disperse. In another reaction vessel was added 4 mL of H 2O and 1.2mL TPAOH, magnetically stirred, poured the dispersed SWCNHs into the reaction solution, and stirred continuously to volatilize the ethanol until the ethanol was completely volatilized, then added 1.117mL TEOS. Stir at room temperature, age for 10 h, transfer the reaction mixture into a polytetrafluoroethylene-lined hydrothermal reactor, and perform a hydrothermal synthesis reaction at 180° C. for 2 days. After the synthesis reaction is finished, it is centrifuged, washed, dried, and finally calcined at 600° C. to remove SWCNHs to obtain Silicate-1 zeolite containing mesoporous pores.

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Abstract

The invention relates to a method for synthesizing mesoporous zeolite by using single-walled carbon nanohorn as a structural template. The mesoporous zeolite can be applied to a petrochemical industry, a fine chemical industry and other chemical industries as a catalyst, an adsorbent, a chemically active substance (such as metal particles) carrier, a liquid-phase or gas-phase separating material and the like, and can also be applied to waste gas treatment, wastewater treatment and other environmental engineering.

Description

technical field [0001] The invention relates to a method for synthesizing mesoporous zeolite by using single-wall carbon nanohorn as a structural template. The material can be used as catalyst, adsorbent, carrier of chemically active substances (such as metal particles), liquid phase or gas phase separation material, etc. in chemical industries such as petrochemical industry and fine chemical industry, and can also be used in environmental engineering such as waste gas and wastewater treatment. Materials, chemicals, and environmental protection. Background technique [0002] Zeolite crystals are widely used in engineering fields such as ion exchange, adsorption, separation, sensors, and catalysis due to their large number of micropores, high specific surface area, good chemical and thermal stability, and mechanical strength. However, due to the small pore size of zeolite crystals, the mass transfer rate of substances is greatly restricted in macromolecular reactions, and ca...

Claims

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Application Information

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IPC IPC(8): C01B39/40C01B31/02
CPCC01B39/40C01P2002/01C01P2006/16C01P2006/17
Inventor 陶有胜高建平王承辉
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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