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Method for preparing epoxypropane by epoxidation of propene

A technology of propylene oxide and epoxidation, which is applied in chemical instruments and methods, organic chemistry, molecular sieve catalysts, etc., can solve the problems of complicated operation and large energy consumption for separation, so as to simplify the reaction system, increase the concentration of propylene, and improve production. The effect of efficiency

Active Publication Date: 2008-10-08
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the preparation of propylene oxide in the prior art is due to the introduction of a large amount of solvent, the operation is complicated, and the problem of high energy consumption for separation provides a new method for preparing propylene oxide by epoxidation of propylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 400 g of propylene, 50.0 g of SiO to a 2 L stainless steel reactor 2 / TiO 2 Titanium-silicon molecular sieve TS-1 catalyst with a molar ratio of 50, the reaction pressure is 2.5MPa, heated to 50°C, and then 300 grams of 30% by weight H 2 o 2 , under stirring, reacted for 5 hours, and the reaction results are shown in Table 1.

Embodiment 2

[0016] Add 400 g of propylene, 15.0 g of SiO to a 2 L stainless steel reactor 2 / TiO 2 Titanium-silicon molecular sieve TS-1 catalyst with a molar ratio of 50, the reaction pressure is 2.6MPa, heated to 50°C, and then 22.5 grams of 40% by weight H 2 o 2 , under stirring, reacted for 10 hours, and the reaction results are shown in Table 1.

Embodiment 3

[0018] Add 400 g of propylene, 12 g of SiO to a 2 L stainless steel reactor 2 / TiO 2 Titanium-silicon molecular sieve TS-1 catalyst with a molar ratio of 50, the reaction pressure is 2.8MPa, heated to 40°C, and then 60 grams of 30% by weight H 2 o 2 , under stirring, reacted for 20 hours, and the reaction results are shown in Table 1.

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Abstract

The invention relates to a method to prepare propylene oxide through the epoxidation of propylene, mainly solving the problems of complex operation and large energy consumption during the separation process in prior art which introduces a large amount of solvent during the preparation of propylene oxide. The method takes peroxide and propylene as material and ti-si molecular sieveTS-1 as catalyzer, and the materials contact with the catalyzer to produce propylene oxide; wherein the mol ration of propylene to peroxide is 1-162:1; the weight ratio of peroxide to catalyzer is 0.2-200:1; the temperature for the reaction is 10-100 DEG C, the absolute pressure is 1.0-3.0MPa and the reaction lasts for 0.1-48h. The technical proposal of the method solves above problems and is applicable to the industrial production of preparing propylene oxide through the epoxidation of propylene.

Description

technical field [0001] The invention relates to a method for preparing propylene oxide by epoxidation of propylene. Background technique [0002] Propylene oxide is an important basic chemical raw material. It is the third largest organic chemical raw material in the output of propylene derivatives after polypropylene and acrylonitrile. Chlorohydrin method and co-oxidation method are the main methods of industrial production of propylene oxide. [0003] The chlorohydrin method uses propylene and chlorine odor raw materials, the process is relatively short, the process is mature, the operating load is flexible, the product selectivity is good, the production is relatively safe, the requirement for the purity of raw material propylene is not high, and the investment is small. At present, the domestic production of propylene oxide All companies use this method. [0004] The co-oxidation method uses isobutane or ethylbenzene as raw material, overcomes the disadvantages of pollu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D301/12C07D303/04B01J29/89
CPCY02P20/52
Inventor 丁琳高焕新陈璐金国杰杨洪云
Owner CHINA PETROLEUM & CHEM CORP
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