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Epoxypropane production method

A technology of propylene oxide and its production method, which is applied in the field of propylene oxide production and can solve the problems of low propylene oxide selectivity and poor catalyst stability, etc.

Inactive Publication Date: 2014-10-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the prior art has the problems of low propylene oxide selectivity and poor catalyst stability, and a new production method of propylene oxide is provided

Method used

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  • Epoxypropane production method

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Under 100 ° C and 0.3MPa, the Moorbi of the isopenenezen and the air is 1: 5 conditions, the oxidation reaction of the isopenenezen and the air is performed to obtain a hydrogen peroxide oxide with a weight concentration of 22%.

[0022] NA 2 CO 3 Wash the hydrogen peroxide oxide liquid with a weight of 5%of the water solution, where the volume ratio of oxide and alkali solution is 4: 1, which removes the acidic substances in it.Then use the deodorized oxidation liquid to remove the NA remaining due to alkali washing + Among them, the volume ratio of oxidation and ionic water is 4: 1.According to the needs of the epoxy reaction, the vacuum reinforcement is performed, and the concentration temperature is 100 ° C to obtain a hydrogen peroxide concentration of 40%of the oxidation solution.It was removed.After treatment, the weight content of the acidic substances in hydrogen peroxide isopenhexide is 50 ppm, H 2 O weight content is 100ppm, NA + The weight content is 50 ppm.

[...

Embodiment 2

[0044] Same as [Example 1], but the weight content of acidic substances is 50 ppm, H 2 O weight content is 100ppm, NA + The weight content is 100ppm.The reaction result is shown in Table 2.

Embodiment 3

[0046] Same as [Example 1], but the weight content of acidic substances is 100 ppm, H 2 O weight content is 50 ppm, NA + The weight content is 50 ppm.The reaction result is shown in Table 2.

[0047] Table 2

[0048]

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Abstract

The invention relates to an epoxypropane production method. The problems of low epoxypropane selectivity and low catalyst stability existing in the prior art are mainly solved. The method comprises the following steps: 1, oxidizing isopropyl benzene by molecular oxygen to obtain a cumene hydroperoxide oxidation solution; 2, controlling the weight percentage concentration of acidic substances in the cumene hydroperoxide oxidation solution not greater than 0.3%, the weight percentage concentration of alkali metal or alkali earth metal ions in the cumene hydroperoxide oxidation solution not greater than 0.2% and the weight percentage concentration of water in the cumene hydroperoxide oxidation solution not greater than 0.5%; 3, reacting the cumene hydroperoxide oxidation solution with propylene under liquid phase conditions under the action of a catalyst to generate epoxypropane and alpha, alpha-dimethylbenzylalcohol; and 4, carrying out a hydrogenolysis reaction on alpha, alpha-dimethylbenzylalcohol by hydrogen in the presence of a catalyst to generate isopropyl benzene, wherein the generated isopropyl benzene is circulated to step a and is used as a raw material for preparing cumene hydroperoxide. The epoxypropane production method well solves the problems, and can be used in the industrial production of epoxypropane preparation.

Description

Technical field [0001] The present invention involves the production method of a propylene oxide. Background technique [0002] Pleopiarine is an important organic chemical intermediate. It is mainly used to produce polyethane polyetherol and propylene glycol for polyurethane. Its output is second only to polypropylene and is the second largest acrylic derivative.At present, the method of industrial production of oxide is mainly chlorolyol and co -oxidation method.Due to a large amount of chlorine -containing water -containing water in the production process, the environmental pollution and equipment corrosion are severely produced; the total oxidation method overcomes the shortcomings and corrosion of chlorol, but the process is long, large investment, many joint products, joint productsThe market affects the production of oxide to a certain extent. [0003] As we all know, the choice of hydrocarbons with porous polynomotical silica oxide has a good catalytic activity and can be...

Claims

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Application Information

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IPC IPC(8): C07D303/04C07D301/19
CPCY02P20/52C07D303/04C07D301/19
Inventor 金国杰高焕新康陈军杨洪云丁琳黄政
Owner CHINA PETROLEUM & CHEM CORP
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