A kind of method of catalyzing propylene epoxidation

A technology of epoxidation and epoxidation reaction, applied in the direction of organic chemistry, etc., can solve the problems such as the catalytic activity stability of catalysts that do not involve the effective utilization rate of hydrogen peroxide, and achieve good effective utilization rate, catalytic oxidation activity and stable activity The effect of improving the property and increasing the diffusion rate

Active Publication Date: 2016-01-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In ZL200710064980.1, it is disclosed that a hollow titanium-silicon molecular sieve with MFI structure is used as a catalyst to carry out propylene epoxidation reaction at a lower temperature of 20-35°C, and a good reaction effect has been achieved (the conversion rate of the oxidant is lower than that of high), but the method target product PO selectivity is the highest only 85.1% (embodiment 2), and wherein does not relate to the catalytic activity stability of hydrogen peroxide effective utilization rate and catalyzer

Method used

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  • A kind of method of catalyzing propylene epoxidation
  • A kind of method of catalyzing propylene epoxidation
  • A kind of method of catalyzing propylene epoxidation

Examples

Experimental program
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Effect test

preparation example 1

[0032] Under normal pressure and 40°C, tetraethyl silicate was added to tetrapropyl ammonium hydroxide aqueous solution, stirred for 2 hours, and then hollow titanium silicon molecular sieve (HTS) was added to continue stirring for 1 hour (HTS, tetraethyl silicate , tetrapropylammonium hydroxide and water mass ratio is 100:50:5:120), after rolling ball granulation, roasting at 550 ℃ for 5 hours, obtain the catalyst of microsphere shape, particle size is 5~20 Micron.

preparation example 2

[0034] Identical to the method of Preparation Example 1, the difference is that the mass ratio of HTS, tetraethyl silicate, tetrapropylammonium hydroxide to water is 100:150:10:250, and the particle diameter obtained after rolling granulation is 50-100 micron microsphere catalyst.

preparation example 3

[0036] Same as the method of Preparation Example 1, the difference is that the mass ratio of HTS, tetraethyl silicate, tetrapropyl ammonium hydroxide and water is 100:400:40:500, and the particle diameter obtained after rolling granulation is 1000-2000 micron microsphere catalyst.

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Abstract

The invention provides a method for catalyzing propylene epoxidation. The method is characterized in that propylene and a catalyst are in contact reaction with a microsphere catalyst on a stationary bed under a propylene epoxidation reaction condition, wherein the microsphere catalyst is obtained by mixing and molding a catalytic activity component and an organosilicon compound hydrolysis product, the catalytic activity component is a hollow titanium silicalite molecular sieve with an MFI structure, and the particle size of the microsphere catalyst is 0.5-5000 microns. The method can be used for improving the selectivity of an objective product in a reaction contact process and meanwhile prolonging the service life of the catalyst.

Description

technical field [0001] The invention relates to a method for catalyzing the epoxidation of propylene, and furthermore, the invention relates to a method for preparing propylene oxide by catalyzing the epoxidation of propylene by using titanium-silicon molecular sieve as a catalytic active component. Background technique [0002] Propylene oxide (PO) is an important basic organic chemical raw material, and its output is second only to polypropylene among propylene derivatives. The biggest use of PO is to produce polyether polyols for further processing to make polyurethane, and it can also be used to produce propylene glycol which is widely used. In addition, propylene oxide can also be used in the production of surfactants, oilfield demulsifiers, etc. [0003] With the wide application of polyurethane materials, etc., the demand for propylene oxide is increasing year by year. At present, there are disadvantages in the process of producing propylene oxide in industry, espec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D301/12C07D303/04
Inventor 史春风林民朱斌慕旭宏汝迎春
Owner CHINA PETROLEUM & CHEM CORP
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