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A kind of aluminum-doped phts mesoporous material and its application

A mesoporous material, aluminum doping technology, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems that cannot be used in the synthesis of PHTS materials that require high aluminum content, limit application fields, etc., and achieve easy adjustment of pore size and wide application Prospects, effects of a wide range of doped aluminum amounts

Inactive Publication Date: 2011-12-07
SHANXI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zhu Jianhua et al. (Adv.Funct.Mater.2008, 18, 82-94) reported a method for synthesizing PHTS materials in an acidic environment by means of elemental salts such as aluminum. The materials provided by this method contain only 0.7-3.0% aluminum, which cannot be used for Synthesis of PHTS materials with high aluminum content is required, thus greatly limiting the application fields of this material

Method used

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  • A kind of aluminum-doped phts mesoporous material and its application
  • A kind of aluminum-doped phts mesoporous material and its application
  • A kind of aluminum-doped phts mesoporous material and its application

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Effect test

Embodiment 1

[0017] Dissolve 3.0g of non-ionic surfactant P123 into 100ml of hydrochloric acid solution (0.5M), control the temperature to dissolve at 35°C, then add 6.6g of TEOS, then add 0.10g of aluminum isopropoxide, continue the heat preservation reaction, and add 60mg of toluene and 10 mg trimethylbenzene liquid, continue to react for 22 hours, then transfer to a 100°C hydrothermal synthesis kettle, age for 24 hours, filter, dry at 80°C, and roast at 500°C for 6 hours to obtain a white aluminum-doped PHTS mesoporous material. Measure 20ml of industrial-grade tetrahydrofuran (containing 10% acetic anhydride), add 0.2g of the above-mentioned aluminum-doped PHTS mesoporous material, and react at 40°C for 4 hours. The separation and yield are 30%, the number average molecular weight is 1800, and the molecular weight distribution is 2.0.

Embodiment 2

[0019] Dissolve 2.5g of nonionic surfactant P123 into 100ml of sulfuric acid solution (0.2M), control the temperature to dissolve at 45°C, then add 6.8g of TMOS, then add 0.15g of aluminum isopropoxide, continue the heat preservation reaction, and add 60mg of toluene solution, continued to react for 24 hours, then transferred to a hydrothermal synthesis kettle at 80°C, aged for 24 hours, filtered, dried at 80°C, and calcined at 500°C for 8 hours to obtain a white aluminum-doped PHTS mesoporous material. Measure 20ml of industrial-grade tetrahydrofuran (containing 10% acetic anhydride), add 0.2g of the above-mentioned aluminum-doped PHTS mesoporous material, and react at 40°C for 6 hours. The separation and yield are 35%, the number average molecular weight is 1800, and the molecular weight distribution is 2.1.

Embodiment 3

[0021] Dissolve 2.5g of nonionic surfactant P123 into 100ml of sulfuric acid solution (0.3M), control the temperature to dissolve at 45°C, then add 6.8g of TMOS, then add 0.2g of butylaluminum, continue the heat preservation reaction, add 60mg of toluene solution , continue to react for 24h, then transfer to 80°C hydrothermal synthesis kettle, age for 24h, filter, dry at 80°C, and bake at 500°C for 8h to obtain white aluminum-doped PHTS mesoporous material. Measure 20ml of industrial-grade tetrahydrofuran (containing 10% acetic anhydride), add 0.2g of the above-mentioned aluminum-doped PHTS mesoporous material, and react at 40°C for 6 hours. The separation and yield are 38%, the number average molecular weight is 1790, and the molecular weight distribution is 1.85.

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Abstract

The invention relates to a mesoporous solid acid material, specifically an aluminum-doped PHTS mesoporous material with a hexagonal pore structure, with a specific surface area of ​​400-1200cm2 / g, a pore volume of 0.4-1.1cm3 / g, and a pore diameter of 4-18nm. The present invention directly hydrothermally synthesizes the aluminum-doped PHTS mesoporous material by introducing toluene combined with aluminum element doping. The mesoporous material can be used in the tetrahydrofuran polymerization reaction, the relative molecular weight of the polymerization product is 1500-2200, the molecular weight distribution is 1.7-2.3, and it has the advantages of moderate acidity, high activity and good stability. It can also be used as a catalytic material for catalytic reactions such as cracking, esterification, and alkylation.

Description

technical field [0001] The invention relates to a mesoporous solid acid material, in particular to an aluminum-doped PHTS mesoporous material with a hexagonal pore structure and its application in tetrahydrofuran polymerization. Background technique [0002] According to the recommendations of the International Union of Pure and Applied Chemistry, nanoporous materials can be divided into: microporous materials, which refer to porous materials with a pore diameter less than 2.0nm; macroporous materials, which refer to porous materials with a pore diameter greater than 50.0nm; Between nm is mesoporous material. In 1992, the research team of Mobil Corporation of the United States first reported the synthesis method of M41S series mesoporous molecular sieves MCM-41, MCM-48, and MCM-50; The synthesis method of the SBA family of mesoporous materials with regular pore size distribution, large pore size (up to 30nm) and thicker pore wall (3-9nm), its thermal stability and hydrother...

Claims

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Application Information

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IPC IPC(8): C01B39/02C08G65/20
Inventor 赵永祥贾志奇卢辉生张建平赵敏赵丽丽盖媛媛梁小元郑学
Owner SHANXI UNIV
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