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Amorphous tin-silicon material as well as preparation method and application thereof

An amorphous, tin-silicon technology, used in nanotechnology for materials and surface science, carboxylate preparation, chemical instruments and methods, etc., can solve the problems of high production cost and expensive soft template, and achieve catalytic active effect

Active Publication Date: 2022-03-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The soft templating method is easy to operate and produces mesoporous pores with good connectivity, so it has gradually become an important method for preparing hierarchically porous amorphous tin-silicon materials, but the soft templating agent is usually expensive and the production cost is high

Method used

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  • Amorphous tin-silicon material as well as preparation method and application thereof
  • Amorphous tin-silicon material as well as preparation method and application thereof
  • Amorphous tin-silicon material as well as preparation method and application thereof

Examples

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Embodiment approach

[0064] In a specific embodiment, the present invention provides an application of an amorphous tin-silicon material in the preparation of methyl lactate from dihydroxyacetone, and the solvent is methanol.

[0065] The present invention will be further illustrated below by way of examples, but the present invention is not thereby subject to any limitation.

[0066] Unless otherwise specified, the raw materials used in the examples and comparative examples are all chemically pure reagents.

[0067] Tetraethyl orthosilicate was purchased from Hunan Jianchang Petrochemical Co., Ltd., tin tetrachloride pentahydrate was purchased from Beijing Yinuokai Technology Co., Ltd., stannous chloride was purchased from Beijing Yinuokai Technology Co., Ltd. Tin was purchased from Beijing Yinuokai Technology Co., Ltd., and chloropropyltrimethoxysilane was purchased from Beijing Yinuokai Technology Co., Ltd.

[0068] The volume of mesopores with a pore diameter of 8-32nm to the total pore volum...

Embodiment 1

[0074] S1. Mix the three substances according to the molar ratio of tetraethyl orthosilicate: tetrapropylammonium hydroxide: deionized water is 1:0.2:20, and stir at room temperature; Chloride tin and stir for 1h to obtain the first mixture, wherein the molar ratio of tetraethyl orthosilicate to tin tetrachloride pentahydrate is 1:0.02, tetraethyl orthosilicate is SiO 2 In terms of tin tetrachloride pentahydrate as SnO 2 count;

[0075] S2. Place the first mixture obtained in step S1 on a magnetic stirrer with a reaction temperature of 70° C. and heat the alcohol for 6 hours to obtain a second mixture;

[0076] S3. Mix the second mixture obtained in step S2 with the chloropropyltrimethoxysilylating agent and stir at room temperature for 5h, wherein the mole of the chloropropyltrimethoxysilylating agent and the tetraethylorthosilicate added in step S1 The ratio is 0.1:1. The above mixture was placed in an autoclave at a reaction temperature of 90°C under autogenous pressure ...

Embodiment 2-11

[0080] The amorphous tin-silicon material is prepared according to the method of Example 1, and its proportioning, synthesis conditions and material proportioning are as described in Table 1; the physicochemical characterization and activity evaluation results of the amorphous tin-silicon material are shown in Table 2, and those not involved in Table 1 Synthetic conditions refer to Example 1.

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Abstract

The invention relates to an amorphous tin-silicon material and a preparation method and application thereof, the volume of mesopores with the aperture of 8-32 nm of the amorphous tin-silicon material accounts for 75-95% of the total pore volume, the ultraviolet spectrum of the amorphous tin-silicon material has a characteristic peak of framework tin at 250-300 nm, the external specific surface area of the amorphous tin-silicon material is 320-600 m < 2 > / g, and the total pore volume is 1-2 cm < 3 > / g. The amorphous tin-silicon material disclosed by the invention is large in mesopore number, large in external specific surface area and total pore volume and good in catalytic performance.

Description

technical field [0001] The invention relates to an amorphous tin-silicon material and its preparation method and application. Background technique [0002] In recent years, in the industrial production process, heterogeneous catalysts have attracted great attention due to their advantages of reusability and easy separation. In the environmentally friendly conversion reaction of oxygen-containing hydrocarbons, heteroatom molecular sieves have shown incomparable advantages over conventional methods. In 1983, Taramasso and others synthesized TS-1 molecular sieve for the first time, and people successively inserted other heteroatoms (such as Fe, Sn, V, Zr and Ga, etc.) into the molecular sieve topology, and prepared a variety of heteroatom molecular sieves. Sn-containing molecular sieves uniformly insert four-coordinated tin atoms into the molecular sieve framework space structure through isomorphic substitution, which endows it with unique acid catalytic properties and becomes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/08C01B37/06B01J29/04B01J35/10C07C67/00B82Y30/00B82Y40/00C07C69/68
CPCC01B39/08C01B37/065B82Y30/00B82Y40/00B01J29/041C07C67/00C01P2006/17C01P2006/12C01P2006/14C01P2004/04C01P2004/64B01J35/617B01J35/615B01J35/638C07C69/68Y02E60/10
Inventor 朱斌刘聿嘉夏长久林民彭欣欣舒兴田
Owner CHINA PETROLEUM & CHEM CORP