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Solid acid catalyst with high-efficiency ring-opening reaction catalysis performance

A ring-opening reaction and catalyst technology, applied in organic chemistry, alkylene oxide preparation ether, ether preparation, etc., can solve the problems of preparation complexity, etc., and achieve the effects of simple post-processing, less catalyst consumption, and good reusability

Inactive Publication Date: 2014-04-23
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, regardless of S, Fe co-doped [TiNbO 5 ] - Both nanosheets and phosphotungstic acid ionic liquid catalysts have the complexity of preparation

Method used

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  • Solid acid catalyst with high-efficiency ring-opening reaction catalysis performance
  • Solid acid catalyst with high-efficiency ring-opening reaction catalysis performance
  • Solid acid catalyst with high-efficiency ring-opening reaction catalysis performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Solid Acid Catalyst S 2 o 8 2- / TiO 2 Synthesis: 1g commercial TiO 2 (titanium dioxide) was added to 15mL0.5mol / L (NH 4 ) 2 S 2 o 8 After soaking and stirring in the solution for 5 hours, the solution was rotovaped and dried at 60°C. Finally, the catalyst S can be obtained by calcining at 500°C for 5 hours. 2 o 8 2- / TiO 2 , the acid content of the catalyst obtained was 1.8 mmol / g.

[0012] The present invention is described in detail below through examples, and these examples are only for clearly disclosing the present invention, not as a limitation to the present invention.

Embodiment 2

[0014] Ring-opening reaction of styrene oxide with methanol as substrate: In a 25mL round bottom flask, add 0.04gS 2 o 8 2- / TiO 2 , 5 mL methanol. After stirring evenly at room temperature, 0.11 mL of styrene oxide was added dropwise to start the reaction. After reacting for a period of time, a certain amount of reaction solution was taken, and the progress of the ring-opening reaction of styrene oxide was monitored by gas chromatography. The results of the catalytic reactions are shown in Table 1.

Embodiment 3

[0016] Other alcohol is the ring-opening reaction of the styrene oxide of substrate: use respectively ethanol, n-propanol, isopropanol, n-butanol to replace the methyl alcohol in the example 2, as solvent. The experiment of investigating catalytic activity is as embodiment 2, and the result of catalytic reaction is shown in Table 1

[0017] Table 1 Catalyst activity evaluation results

[0018]

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Abstract

The invention discloses a solid acid catalyst. Commercial TiO2 (titanium dioxide) serving as a matrix is immersed by using an ammonium persulfate solution and roasted at a high temperature, so that S2O8<2-> / TiO2 is prepared. The catalyst has a certain acid content, has high-efficiency performance for catalyzing alcoholysis ring-opening reaction styrene oxide at a room temperature; the solid acid catalyst is simple in preparation, and has reusability; a raw material is easily available. The solid acid catalyst belongs to one kind of ring-opening reaction catalysts which is environment-friendly and easy to industrialize.

Description

technical field [0001] The invention belongs to the field of inorganic functional materials, and relates to an acid catalyst for ring-opening reaction. Specifically, it is a solid superacid (S 2 o 8 2- / TiO 2 ) Preparation and application of ring-opening reaction catalyst. Background technique [0002] β-alkoxy alcohols play an important role in fine chemicals and pharmaceutical chemicals, and are usually prepared by ring-opening reactions of epoxy compounds and alcohols under acid or alkali conditions. Some typical Lewis acids (such as BF 3 ·OEt 2 , SnCl 4 , FeCl 3 )with acid (such as H 2 SO 4 , HCl, etc.) can be used for alcoholysis catalysts of epoxy compounds, but these catalytic systems all use disposable catalysts, are difficult to separate and wash, and have problems such as polluting the environment, which greatly limit their practical applications. Therefore, the development and application of high-efficiency, recyclable, green and environmentally frien...

Claims

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Application Information

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IPC IPC(8): B01J27/04C07C43/178C07C41/03
Inventor 陈静杨惠侯文华胡晨晖张丽宏张荣梅伟钢黄前进
Owner NANJING UNIV OF TECH
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