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Method for synthesizing ordered mesoporous ZSM-5 through in-situ template carbonization

A ZSM-5, mesoporous technology, applied in the field of synthesizing ordered mesoporous ZSM-5, can solve problems such as unfavorable growth of zeolite

Inactive Publication Date: 2017-08-11
ANSHUN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, conventional hydrothermal methods may be unfavorable for zeolite growth on the outer surface of CMK-3, and zeolite precursors may migrate from the outer surface of CMK-3, agglomerating into disordered mesoporous structures or forming large-sized zeolite crystals.

Method used

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  • Method for synthesizing ordered mesoporous ZSM-5 through in-situ template carbonization
  • Method for synthesizing ordered mesoporous ZSM-5 through in-situ template carbonization
  • Method for synthesizing ordered mesoporous ZSM-5 through in-situ template carbonization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 As shown, first, the SBA-15 / P123 complex and the MCF-P123 complex were prepared separately.

[0042] Weigh 4g of P123 and add 16.8mL of 36.5wt% HCl and 104mL of H 2 In the HCl solution prepared by O, stir vigorously until it is completely dissolved, then add 7.36 mL of analytically pure TEOS and mix, first place it in an environment of 40°C for 20h, and then place it in an environment of 100°C for 24h after aging, Filter and dry the residue at room temperature to obtain the SBA-15 / P123 complex; weigh 4g of P123 and add 16.8mL of 36.5wt% HCl and 104mL of H 2 To the HCl solution prepared by O, add 4.3mL of 2,4,6-trimethylbenzene, stir vigorously until it is completely dissolved, then add 7.36mL of analytically pure TEOS, mix, filter, and dry the residue at room temperature to obtain MCF -P123 complex.

[0043] Secondly, the SBA-15 / P123 complex and the MCF-P123 complex were carbonized.

[0044] The carbonization process and technological conditions of SBA-15 / P1...

Embodiment 2

[0048] First, the SBA-15 / P123 complex and the MCF-P123 complex were prepared separately.

[0049] Weigh 4g of P123 and add 16.8mL of 36.5wt% HCl and 104mL of H 2 In the HCl solution prepared by O, stir vigorously until it is completely dissolved, then add 7.36 mL of analytically pure TEOS and mix, first place it in an environment of 40°C for 20h, and then place it in an environment of 100°C for 24h after aging, Filter and dry the residue at room temperature to obtain the SBA-15 / P123 complex; weigh 4g of P123 and add 16.8mL of 36.5wt% HCl and 104mL of H 2 To the HCl solution prepared by O, add 4.3mL of 2,4,6-trimethylbenzene, stir vigorously until it is completely dissolved, then add 7.36mL of analytically pure TEOS, mix, filter, and dry the residue at room temperature to obtain MCF -P123 complex.

[0050] Secondly, the SBA-15 / P123 complex and the MCF-P123 complex were carbonized.

[0051] The carbonization process and technological conditions of SBA-15 / P123 composite and MCF-P123 co...

Embodiment 3

[0055] First, the SBA-15 / P123 complex and the MCF-P123 complex were prepared separately.

[0056] Weigh 3.5g of P123 and add 15mL of 36.5wt% HCl and 100mL of H 2 In the HCl solution prepared by O, stir vigorously until it is completely dissolved, then add 5 mL of analytically pure TEOS and mix, first place it in an environment of 40 ℃ for aging for 20 hours, then place it in an environment of 100 ℃ for aging for 24 hours, then filter , The obtained filter residue is dried at room temperature to obtain the SBA-15 / P123 complex; weigh 3.5g of P123 and add 15mL of 36.5wt% HCl and 100mL of H 2 To the HCl solution prepared by O, add 4 mL of 2,4,6-trimethylbenzene, stir vigorously until it is completely dissolved, then add 5 mL of analytically pure TEOS, mix, filter, and dry the residue at room temperature to obtain MCF-P123 Complex.

[0057] Secondly, the SBA-15 / P123 complex and the MCF-P123 complex were carbonized.

[0058] The carbonization process and technological conditions of SBA-15...

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Abstract

The invention belongs to the technical field of a synthesis method of ZSM-5 molecular sieves, and particularly relates to a method for synthesizing ordered mesoporous ZSM-5 through in-situ template carbonization. The method comprises steps as follows: step one, an SBA-15 / P123 compound and an MCF-P123 compound are prepared; step two, the SBA-15 / P123 compound and the MCF-P123 compound are carbonized respectively; step three, the ordered mesoporous ZSM-5 is synthesized with a steam assisted crystallization method. According to the synthesis method, SBA-15 with a P123 template which is not removed is subjected to in-situ two-step carbonization, namely, sulfuric acid pre-carbonization and argon high-temperature carbonization at 900 DEG C, so that the internal P123 soft template is carbonized into an ordered mesoporous hard template to the greatest extent, after impregnation with a TPAOH solution and steam assisted crystallization, air calcination is performed to remove carbon finally, and two crystalized ordered mesoporous ZSM-5 molecular sieves with different mesopore sizes are obtained.

Description

Technical field [0001] The invention belongs to the technical field of ZSM-5 molecular sieve synthesis methods, and specifically relates to a method for synthesizing ordered mesoporous ZSM-5 by using an in-situ carbonization template. Background technique [0002] Molecular sieves have the function of size and shape sieving, and are widely used in many fields such as catalysis, oil refining, adsorption, separation, etc., and are made into various products such as ion exchangers, volatile organic compound (VOC) adsorbents, and optoelectronic devices , Sensors, drug capsules, skin care products, etc. In the catalytic reaction, methanol to olefins, catalytic cracking, hydrogenation and other reactions with molecular sieve as the main catalyst realize the production of basic organic chemical raw materials from coal or natural gas through methanol, providing an effective way to solve the energy crisis. [0003] The main factors affecting the catalytic performance of the molecular sieve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/40
CPCC01B39/40C01P2002/72C01P2004/03C01P2004/04
Inventor 魏方方张秋云张玉涛
Owner ANSHUN UNIV
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