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Cumyl hydroperoxide and propylene epoxidation method

A technology of cumene hydroperoxide and epoxidation, which is applied in chemical recovery, organic chemistry, etc., can solve the problems of reaction temperature rise and achieve the effect of reducing reaction temperature rise and improving selectivity

Active Publication Date: 2014-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that there is a higher reaction temperature rise in the prior art and the need for a higher molar ratio of propylene to cumene hydroperoxide in order to maintain a higher reaction efficiency, providing a new A method for epoxidation of cumene hydroperoxide and propylene, under the premise of not increasing the total molar ratio of propylene and cumene hydroperoxide, the method can effectively reduce the reaction temperature rise and increase the reaction propylene and propylene in the catalyst bed The molar ratio of cumene hydroperoxide has the characteristics of high selectivity to propylene oxide

Method used

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  • Cumyl hydroperoxide and propylene epoxidation method

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Experimental program
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Effect test

Embodiment 1

[0030] press figure 1 As shown in the technical scheme, the raw material contains a mixture of cumene hydroperoxide with a concentration of 35% by weight, the flow rate is 101166.1 kg / h, the raw material propylene is 10812.7 kg / h, the circulating propylene is 92993.1 kg / h, and the circulation loop of 136648.1 kg / h The oxidation reaction products are mixed, and enter the single-bed adiabatic fixed-bed reactor under the conditions of a reaction temperature of 55°C and a reaction pressure of 3.1MPaG, and mix with Ti / SiO 2 Upon contact with the catalyst, the liquid phase epoxidation reaction generates propylene oxide, dimethylbenzyl alcohol and other by-products. Cumene Hydroperoxide Weight Space Velocity 4.5hr -1 , The molar ratio of total propylene to cumene hydroperoxide is 10.2, the molar ratio of propylene to cumene hydroperoxide at the inlet of the catalyst bed reaches 16.3, and the reactor outlet temperature is 85.8℃. The total conversion rate of benzene was 99.4%, and the m...

Embodiment 2

[0033] Same as [Embodiment 1], only the flow rate of circulating propylene is changed: the circulating propylene flow rate is 61995.4 kg / h, and the others are the same as [Embodiment 1]. Cumene Hydroperoxide Weight Space Velocity 4.5hr -1 , The molar ratio of total propylene to cumene hydroperoxide is 7.1, the molar ratio of propylene to cumene hydroperoxide at the inlet of the catalyst bed reaches 11.2, the reactor outlet temperature is 89.2℃, The total conversion rate of benzene was 99.4%, and the molar selectivity of propylene oxide was 96.0%.

[0034]

Embodiment 3

[0036] Same as [Example 1], only the reactor form is changed: two-bed adiabatic fixed bed reactor, the others are the same as [Example 1]. Cumene Hydroperoxide Weight Space Velocity 4.5hr -1 , The molar ratio of total propylene to cumene hydroperoxide is 10.2, the molar ratio of propylene to cumene hydroperoxide at the inlet of the catalyst bed reaches 16.3, and the reactor outlet temperature is 85.8℃. The total conversion rate of benzene was 99.4%, and the molar selectivity of propylene oxide was 96.2%.

[0037]

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Abstract

The invention relates to a cumyl hydroperoxide and propylene epoxidation method, which mainly solves the problems of high reaction temperature and high molar ratio of propylene and cumyl hydroperoxide to keep high reaction efficiency in the prior art. The method is as below: introducing the materials of cumyl hydroperoxide and liquid phase propylene into a reaction zone, and contacting the materials with a Ti-silica catalyst to conduct an epoxidation reaction under the conditions of epoxidation reaction temperature of 15-160 DEG C, pressure of 1.0-12.0 MPa and molar ratio of propylene and cumyl hydroperoxide of 2-30, so as to generate epoxypropane, wherein part of the epoxidation reaction products containing epoxypropane recycles to a reaction zone entrance. The technical scheme can well solve the above problems, and can be used in industrial production of epoxypropane from epoxidation of cumyl hydroperoxide and the propylene.

Description

Technical field [0001] The invention relates to a method for epoxidizing cumene hydroperoxide and propylene. Background technique [0002] Propylene oxide is an important basic chemical raw material. It is the third largest propylene derivative after polypropylene and acrylonitrile. It is mainly used to produce polyether, propylene glycol, etc. It is also the main raw material for fourth-generation detergent non-ionic surfactants, oil field demulsifiers, and pesticide emulsifiers. Propylene oxide derivatives are widely used in industries such as automobiles, construction, food, tobacco, medicine and cosmetics. Nearly 100 kinds of downstream products have been produced, which are important raw materials for fine chemical products. [0003] The traditional production process of propylene oxide is the chlorohydrin process, which includes three steps: chlorohydrinization of propylene and hypochlorous acid solution, saponification of chloropropanol and lime milk, and product refining...

Claims

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Application Information

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IPC IPC(8): C07D303/04C07D301/19
CPCY02P20/584C07D303/04C07D301/19
Inventor 邵百祥李木金
Owner CHINA PETROLEUM & CHEM CORP
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