Olefin epoxidized catalyst and preparation method and application thereof

A catalyst and epoxidation technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve low utilization rate, high production cost, and restrictive synthesis methods Large-scale application and other issues, to achieve the effect of high selectivity, easy separation, and mild reaction conditions

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 production cost is high 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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1

[0024] Preparation of mesoporous titanium oxide

[0025] First, butyl titanate and acetylacetone were slowly added to the ethanol (1 / 2 volume) solution containing cetylammonium bromide at the same time, and stirred at room temperature for 1 hour. Recorded as solution 1. Secondly, mix the remaining ethanol solution (1 / 2 volume) with deionized water, then add hydrochloric acid and mix well, adjust the pH of the solution to 2, and record it as solution 2. Third, under the condition of vigorous stirring of solution 1, add solution 2 to solution 1 at a rate of 0.2 ml / min, and continue to stir for 2 hours until a transparent and stable sol is obtained. The molar ratios of the reactants are: n (butyl titanate): n (hexadecyl ammonium bromide): n (ethanol): n (water): n (acetylacetone) = 1:0.02:15:2 : 0.1. After the sample is gelled, it goes through two aging stages. In the first stage, it is aged for 8 hours at a temperature of 20°C. In the second stage, aging at 70...

Example Embodiment

[0030] Example 2

[0031] Preparation of mesoporous titanium oxide

[0032] First, butyl titanate and acetylacetone were slowly added to the ethanol (3 / 4 volume) solution containing cetylammonium bromide at the same time, and stirred at room temperature for 5 hours. Recorded as solution 1. Secondly, mix ethanol (1 / 4 volume) with deionized water, then add an appropriate amount of hydrochloric acid and mix well, adjust the pH of the solution to 6.5, and record it as solution 2. Third, under the condition of vigorous stirring of solution 1, add solution 2 to solution 1 at a rate of 0.6 ml / min, and continue stirring for 6 hours until a transparent and stable sol is obtained. The molar ratios of the reactants are: n (butyl titanate): n (hexadecyl ammonium bromide): n (ethanol): n (water): n (acetylacetone) = 1:0.15:20:8 : 0.8. After the sample gelled, it went through two aging stages, the first stage was aging at 25°C for 20 hours. In the second stage, aging at 80°C for 7 hours. F...

Example Embodiment

[0037] Example 3

[0038] Preparation of mesoporous titanium oxide

[0039] First, butyl titanate and acetylacetone were slowly added to an ethanol (1 / 2 volume) solution containing cetylammonium bromide at the same time, and stirred at room temperature for 3 hours. Recorded as solution 1. Secondly, mix ethanol (1 / 2 volume) with deionized water, then add hydrochloric acid and mix well, adjust the pH of the solution to 4, and record it as solution 2. Third, under the condition of vigorous stirring of solution 1, add solution 2 to solution 1 at a rate of 0.4 ml / min, and continue to stir for 4 hours until a transparent and stable sol is obtained. The molar ratios of the reactants are: n (butyl titanate): n (hexadecyl ammonium bromide): n (ethanol): n (water): n (acetylacetone) = 1:0.02:17:2 : 0.5. After the sample gelled, it went through two aging stages, the first stage was aging at 15°C for 15 hours. In the second stage, aging at 73°C for 6 hours. Finally, the sample is calcine...

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PUM

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Abstract

The invention relates to an olefin epoxidized catalyst. The olefin epoxidized catalyst is prepared from cobalt oxides serving as active ingredients and mesoporous titanium oxide serving as a carrier by an impregnation method, wherein the load of cobalt is between 0.5 and 15 weight percent, and the balance is the mesoporous titanium oxide serving as the carrier. A preparation method comprises the following steps of: adding olefin, the catalyst and a solvent into a stirring kettle; introducing oxygen or air; reacting the mixture with stirring at the reaction temperature for 4 to 8 hours; filtering the mixture, and separating a solid catalyst out; and rectifying liquid to obtain the olefin epoxide. The invention has the advantages that: the catalyst has high reactivity and high selectivity, oxidants are environmental friendly and have low cost, the reaction condition is mild, and the catalyst can be easily separated from products.

Description

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

Claims

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Application Information

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IPC IPC(8): C07D301/06B01J23/75C07D303/04
Inventor 赵亮富崔海涛
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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