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Mesoporous titanium-silicon molecular sieve, and preparation method and application thereof

A technology of titanium-silicon molecular sieve and silicon molecular sieve, which is applied in the field of mesoporous nano-titanium-silicon molecular sieve TS-1 and its preparation, can solve the problems of increased catalyst cost, low selectivity, and high energy consumption

Active Publication Date: 2013-10-23
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the gold-loaded titanium-silicon molecular sieve catalyst prepared by the deposition-precipitation method has higher catalytic activity than other catalysts, the catalyst still has certain deactivation problems (Document 1: J.Catal.2012, 287, 178–189)
Recently, there have been reports on the use of ionic liquid-enhanced biomass methods to synthesize supported gold catalysts with high stability, but the catalysts need to be used at 300 degrees, with high energy consumption and low selectivity (<80%); in addition, Ionic liquids are expensive, and the biomass reduction method used cannot selectively deposit gold particles near the active site titanium of the titanium-silicon molecular sieve, which wastes a part of the gold and invisibly increases the cost of the catalyst (Document 2: Ind.Eng.Chem. Res.2011, 50, 9019–9026)

Method used

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  • Mesoporous titanium-silicon molecular sieve, and preparation method and application thereof
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  • Mesoporous titanium-silicon molecular sieve, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0065] Preparation of Mesoporous Nano Ti-Si Molecular Sieve TS-1

[0066] Put 12.2g of tetrapropylammonium hydroxide in a beaker, add 30g of water and 11g of ethyl orthosilicate and stir for 30 minutes to obtain solution A. Take 4.5mL of isopropanol and 0.51g of n-butyl titanate, mix evenly, add to A at a rate of 0.2ml / min and stir for 3 hours to obtain solution B. At the same time, 29g of F127 was dissolved in 20g of water to obtain solution C. Add B dropwise to C at a rate of 0.2ml / min, age at 60°C for 6 hours, and remove alcohol at 90°C for 12 hours to dry gel. Put the dry gel in a small beaker, put it into an autoclave containing 10mL of water, crystallize at 160°C for 18 hours, take it out, wash and dry it, and bake it in an air atmosphere at 550°C for 6 hours.

Embodiment 2

[0068] Preparation of Mesoporous Nano Ti-Si Molecular Sieve TS-1

[0069] Put 12.2g of tetrapropylammonium hydroxide in a beaker, add 30g of water and 11g of ethyl orthosilicate and stir for 30 minutes to obtain solution A. Take 4.5mL of isopropanol and mix with 0.034g of n-butyl titanate evenly, add to A at a rate of 0.01ml / min and stir for 5 hours to obtain solution B. At the same time, 2.9g of P123 was dissolved in 20g of water to obtain solution C. Add B dropwise to C at a rate of 0.01ml / min, age at 60°C for 8 hours, and remove alcohol at 90°C for 16 hours to dry gel. Put the dry gel in a small beaker, put it into an autoclave containing 10mL of water, crystallize at 180 degrees for 48 hours, take it out, wash and dry it, and bake it in an air atmosphere at 550 degrees for 6 hours.

Embodiment 3

[0071] Preparation of Mesoporous Nano Ti-Si Molecular Sieve TS-1

[0072] Put 12.2g of tetrapropylammonium hydroxide in a beaker, add 30g of water and 11g of ethyl orthosilicate and stir for 30 minutes to obtain solution A. Take 4.5mL of isopropanol and 0.17g of n-butyl titanate, mix evenly, add to A at a rate of 0.2ml / min and stir for 5 hours to obtain solution B. At the same time, 2.9g of P123 was dissolved in 20g of water to obtain solution C. Add B dropwise to C at a rate of 0.2ml / min, age at 60°C for 8 hours, and remove alcohol at 90°C for 12 hours to dry gel. Put the dry gel in a small beaker, put it into an autoclave containing 10mL of water, crystallize at 170°C for 18 hours, take it out, wash and dry it, and bake it in an air atmosphere at 550°C for 6 hours.

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Abstract

The invention discloses a mesoporous titanium-silicon molecular sieve, and a preparation method and application thereof. The titanium-silicon molecular sieve is a mesoporous nano titanium-silicon molecular sieve TS-1. The invention also discloses a novel catalyst for preparing an epoxy propane system through direct gas-phase epoxidation of propylene. Metal particles are loaded on the catalyst by taking the mesoporous nano titanium-silicon molecular sieve TS-1 provided by the invention as a supporter.

Description

technical field [0001] The invention relates to a catalyst, in particular to a mesoporous nano-titanium-silicon molecular sieve TS-1, a preparation method thereof and the use of the propylene oxide system in the direct gas-phase epoxidation of propylene. Background technique [0002] Propylene oxide (PO), as the third largest organic chemical product in the production of propylene derivatives after polypropylene and acrylonitrile, is widely used in the preparation of derivatives such as polyurethane and polyester resins. At present, the main methods of producing PO in industry are chlorohydrin method and co-oxidation method. However, the chlorohydrin method does not meet the requirements of today's green environmental protection due to its great corrosion on equipment and the production of a large amount of waste water and chlorine-containing by-products. However, the economics of the co-oxidation method is restricted by a large number of by-products. Recently, the emergin...

Claims

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Application Information

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IPC IPC(8): B01J29/89C07D303/04C07D301/10
Inventor 周兴贵冯翔段学志钱刚
Owner EAST CHINA UNIV OF SCI & TECH
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