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Styrene epoxidizing catalyst as well as preparation method and application thereof

A technology of catalyst and styrene, which is applied in the field of styrene epoxidation catalyst and its preparation and application, can solve the problems of restricting the large-scale application of synthetic methods, high cost, and low utilization rate of H2O2, and achieve easy separation, low environmental cost, Environmentally friendly effect

Inactive Publication Date: 2011-02-16
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the problem that this production method exists is that cost is higher and H 2 o 2 The utilization rate is too low, which restricts the large-scale application of this synthetic method
In addition, others have developed O 2 -H 2 , O 2 -Zn, or O 2 - Synthetic systems such as organic reducing agents. The advantage of this system is that it uses environmentally friendly and cheap oxygen as the oxidizing agent, but the disadvantage is that it must sacrifice the cost of the co-reducing agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of Amino Functionalized Mesoporous Molecular Sieve SBA-15

[0019] First, the preparation of mesoporous silicon SBA-15. Dissolve the three-block copolymer P123 template in water and concentrated hydrochloric acid, add orthosilicate ethyl ester after clarification. The molar ratio of each substance is n (orthosilicate ethyl ester): n (P123): n (HCl): n (H 2 O) is 1:0.017:5.85:162.7. The resulting mixture was stirred at 40° C. for 24 h, and crystallized in an autoclave for 24 h. After filtering, washing and drying, the original molecular sieve powder is obtained. The raw powder was calcined in a muffle furnace at 550°C to obtain mesoporous silicon SBA-15. Secondly, the mesoporous silicon molecular sieve SBA-15 was immersed in the 3-aminopropyltriethoxysilane toluene solution, and refluxed at 60°C for 6 hours, wherein the molecular sieve SBA-15, 3-aminopropyltriethoxysilane and The weight ratio of toluene is 1:5:70. Secondly, after filtration, extract wit...

Embodiment 2

[0025] Preparation of Amino Functionalized Mesoporous Molecular Sieve SBA-15

[0026] First, the mesoporous silicon molecular sieve SBA-15 was prepared. Dissolve the three-block copolymer P123 template in water and concentrated hydrochloric acid, add orthosilicate ethyl ester after clarification. The molar ratio of each substance is n (orthosilicate ethyl ester): n (P123): n (HCl): n (H 2 O) is 1:0.017:5.85:162.7. The resulting mixture was stirred at 40° C. for 24 h, and crystallized in an autoclave for 24 h. After filtering, washing and drying, the original molecular sieve powder is obtained. The raw powder was calcined in a muffle furnace at 550°C to obtain mesoporous silicon SBA-15. Secondly, a certain amount of mesoporous molecular sieve SBA-15 was immersed in the toluene solution of 3-aminopropyltriethoxysilane, and refluxed at 80°C for 12 hours, wherein the molecular sieve SBA-15, 3-aminopropyltriethoxy The weight ratios of silane and toluene are 1:10:120, respectiv...

Embodiment 3

[0032] Preparation of Amino Functionalized Mesoporous Molecular Sieve SBA-15

[0033] First, pure silicon mesoporous molecular sieve SBA-15 was prepared. Dissolve the three-block copolymer P123 template in water and concentrated hydrochloric acid, add orthosilicate ethyl ester after clarification. The molar ratio of each substance is n (orthosilicate ethyl ester): n (P123): n (HCl): n (H 2O) is 1:0.017:5.85:162.7. The resulting mixture was stirred at 40° C. for 24 h, and crystallized in an autoclave for 24 h. After filtering, washing and drying, the original molecular sieve powder is obtained. The raw powder was calcined in a muffle furnace at 550°C to obtain mesoporous silicon SBA-15. Secondly, the mesoporous molecular sieve SBA-15 was immersed in the toluene solution of 3-aminopropyltriethoxysilane, and refluxed at 70°C for 6 hours, wherein the molecular sieve SBA-15, 3-aminopropyltriethoxysilane and The weight ratio of toluene is 1:8:70, respectively. Secondly, after ...

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Abstract

The invention relates to a styrene epoxidizing catalyst which is prepared from Co<2+> as an active component by using an amino functionalized mesoporous molecular sieve SBA-15 to absorb Co<2+> through the ion absorption method, wherein the loading capacity of Co is 0.3-2 wt%, and the rest part is the amino functionalized mesoporous molecular sieve SBA-15. The catalyst is prepared by using an immersion method. The application of the catalyst comprises the following steps of: adding styrene, the catalyst and a solvent into an agitating kettle; introducing oxygen or air, and reacting under agitation and reaction temperature; separating out the solid catalyst, and rectifying the liquid to separate out epoxy phenylethane, the solvent and other side products. The invention has the advantages of good catalyst reaction activity, high selectivity, environmental-friendly and cheap oxidizing agent, mild reaction conditions and easy separation of the catalyst and the products.

Description

technical field [0001] The invention relates to a styrene epoxidation catalyst, a preparation method and application thereof. Background technique [0002] Styrene oxide produced by the epoxidation of styrene is an important intermediate, which can be used as epoxy resin diluent, UV2 diluent and flavor enhancer, and is also used in organic synthesis, pharmaceutical industry and perfume industry. It is an important intermediate with high market price and plays an important role in the national economy. Therefore, it is of great practical significance to carry out the research on the heterogeneous catalytic epoxidation of styrene. [0003] The traditional industrial production method of styrene oxide is the chlorohydrin method, which produces a large amount of waste, causes serious environmental pollution, and has high material consumption and energy consumption. The newly developed hydrogen peroxide method is considered to be a green and environmentally friendly production ...

Claims

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Application Information

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IPC IPC(8): C07D301/06B01J29/035C07D303/04
Inventor 赵亮富崔海涛
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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