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Ordered mesopore ZSM-5 molecular sieve and preparation method thereof

A ZSM-5, ordered mesoporous technology, applied in the direction of crystalline aluminosilicate zeolite, borocarbane silicone crystalline aluminosilicate zeolite, etc., can solve the problems of poor catalytic effect and selectivity of molecular sieves, and achieve excellent catalytic performance performance, high performance, conversion-increasing performance

Inactive Publication Date: 2013-05-15
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ZSM-5 contains MCM-41, and what is obtained is actually a mixed molecular sieve of ZSM-5 and MCM-41. The catalytic effect and selectivity of molecular sieves are far inferior to pure ZSM-5.

Method used

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  • Ordered mesopore ZSM-5 molecular sieve and preparation method thereof
  • Ordered mesopore ZSM-5 molecular sieve and preparation method thereof
  • Ordered mesopore ZSM-5 molecular sieve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Add 0.8000g cetyltrimethylammonium bromide (0.0022mol), 2.8ml 0.2mol / L sodium hydroxide solution, and 384ml water into a three-necked flask, mechanically stir at 80°C for 1.5h, then add 4ml Tetraethyl orthosilicate (0.02mol), continue to stir for 2 hours, and stand at 80°C for 20 hours. After the reaction, filter and wash repeatedly with deionized water to remove impurity ions adsorbed on the surface, and put Oven dry.

[0027] (2) Put the dried solid above into a mortar and grind it into powder, add it into a three-necked flask, then add 2.6600g (0.01mol) of tetrapropylammonium bromide, 0.0735g of aluminum isopropoxide (0.36mmol), 100ml of water, after ultrasonication for 0.5h, reflux at 90°C for 20h.

[0028] (3) Put the above solution into a stainless steel reaction kettle, put it in a 130°C oven, and crystallize for 7 days. Washing, filtering, drying, and calcination at 550° C. for 5 hours to obtain a ZSM-5 molecular sieve with ordered mesopores.

[0029] The...

Embodiment 2

[0031] (1) Add 0.8000g cetyltrimethylammonium bromide (0.0022mol), 2.8ml 0.2mol / L sodium hydroxide solution, and 384ml water into a three-necked flask, mechanically stir at 80°C for 1.5h, then add 4ml (0.02mol) tetraethyl orthosilicate, continue to stir for 2 hours, and stand at 80°C for 20 hours. After the reaction, filter and wash repeatedly with deionized water to remove impurity ions adsorbed on the surface, and put it in the Oven dry.

[0032](2) Put the dried solid above into a mortar and grind it into powder, add it into a three-necked flask, then add 2.6600g (0.01mol) tetrapropylammonium bromide, 0.0363g aluminum isopropoxide (0.18mmol), 100ml of water, after ultrasonication for 0.5h, reflux at 90°C for 20h.

[0033] (3) Put the above solution into a stainless steel reaction kettle, put it in a 140°C oven, and crystallize for 7 days. After washing, filtering, drying, and calcination at 550°C for 5 hours, a ZSM-5 molecular sieve with ordered mesopores was obtained.

Embodiment 3

[0035] (1) Add 0.8000g cetyltrimethylammonium bromide, 2.8ml 0.2mol / L sodium hydroxide solution, 384ml water into a three-necked flask, mechanically stir at 60°C for 1.5h, then add 4ml (0.02mol) Tetraethyl orthosilicate, continue to stir for 2 hours, and stand at 60°C for 20 hours. After the reaction, filter and wash repeatedly with deionized water to remove impurity ions adsorbed on the surface, and dry in an oven at 80°C.

[0036] (2) Put the above-mentioned dry solid into a powder in a mortar, add it to a three-necked flask, and then add 2.6600g (0.01mol) tetrapropylammonium bromide, 0.0192g aluminum isopropoxide (0.09mmol), 100ml Water, after ultrasonication for 0.5h, was condensed and refluxed at 90°C for 20h.

[0037] (3) Put the above solution into a stainless steel reaction kettle, put it in a 150°C oven, and crystallize for 7 days. After washing, filtering, drying, and calcination at 550°C for 5 hours, a ZSM-5 molecular sieve with ordered mesopores was obtained.

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Abstract

The invention discloses a preparation method of an ordered mesopore ZSM-5 molecular sieve. The preparation method comprises the following steps of: firstly preparing an ordered mesopore silicon oxide molecular sieve serving as a silicon source through an organic template method; and then transforming the ordered mesopore silicon oxide molecular sieve into the ordered mesopore ZSM-5 molecular sieve in situ by adopting a hydrothermal method. The ordered mesopore ZSM-5 molecular sieve disclosed by the invention is provided with ordered micropores with pore diameter being 0.2-2 nanometers and ordered mesopores with pore diameter being 2-50 nanometers and has wide application prospect in the fields of petrochemical industry, petroleum processing, coal chemical industry, and the like.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic non-metallic materials and catalysts, and in particular relates to a preparation method of ZSM-5 molecular sieve with ordered mesopores. Background technique [0002] Energy plays a vital role in the economic development of a country. As a traditional energy source, petroleum resources play an important role in human survival and social and economic development. However, with the increasingly heavy and inferior quality of crude oil, catalytic cracking and hydrocracking of heavy oil and light oil are important processes for deep processing of heavy oil to prepare light oil. Therefore, we put forward higher requirements on the conversion efficiency of the catalyst. Microporous zeolite materials are widely used in petroleum refining and petrochemical fields due to their regularly arranged micropore channels and highly crystalline walls as well as a large number of uniformly distributed activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/40
Inventor 郭亚平郭亚军陈婷褚联峰
Owner SHANGHAI NORMAL UNIVERSITY
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