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Device and method for generating alkylene oxide through reaction of alkylbenzene peroxide and low-carbon olefin

A technology for alkylbenzene peroxides and low-carbon olefins, applied in chemical instruments and methods, organic chemistry, chemical/physical processes, etc. Frequent replacement of catalysts and other issues, to achieve the effect of prolonging catalyst life, uniform distribution of reactant concentration, and prolonging operation cycle

Pending Publication Date: 2020-02-14
SINOPEC ENG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The inventors of the present invention have found in research that there are following defects in the existing device that adopts the reaction of alkylbenzene peroxides and light olefins of adiabatic bed epoxidation technology to generate alkylene oxides: 1. In the epoxidation process, when When the initial concentration of alkylbenzene peroxide is high and the initial activity of the catalyst is high, the reaction temperature will rise, which will easily lead to the accelerated deactivation of the catalyst, thus requiring frequent replacement of the catalyst; 2. When the local concentration of alkylbenzene peroxide is high , easily lead to a decrease in the selectivity of alkylbenzene peroxides and a decrease in product yield

Method used

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  • Device and method for generating alkylene oxide through reaction of alkylbenzene peroxide and low-carbon olefin
  • Device and method for generating alkylene oxide through reaction of alkylbenzene peroxide and low-carbon olefin
  • Device and method for generating alkylene oxide through reaction of alkylbenzene peroxide and low-carbon olefin

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Embodiment 1

[0046] use as figure 1 The shown device for reacting alkylbenzene peroxides with low-carbon olefins to generate alkylene oxides reacts alkylbenzene peroxides with low-carbon olefins to generate alkylene oxides.

[0047] Such as figure 1 As shown, the device includes three reactors in series, which are successively the first epoxidation reactor 1A, the second epoxidation reactor 2B and the third epoxidation reactor 2C, wherein the first epoxidation reactor 1A is a tubular isothermal bed reactor, the second epoxidation reactor 2B and the third epoxidation reactor 2C are adiabatic bed reactors; the first epoxidation reactor 1A is provided with a heat removal medium inlet and outlet pipeline, The discharge pipeline of the first epoxidation reactor 1A directly connects the second epoxidation reactor 2B; the discharge pipeline of the second epoxidation reactor 2B connects the second reaction discharge cooler 4B and then connects the third loop Oxidation reactor 2C, the discharge p...

Embodiment 2

[0053] use as figure 2 The shown device for reacting alkylbenzene peroxides with low-carbon olefins to generate alkylene oxides reacts alkylbenzene peroxides with low-carbon olefins to generate alkylene oxides. Different from Example 1, the three reactors connected in series are the first epoxidation reactor 1A, the second epoxidation reactor 1B, and the third epoxidation reactor 1C, and the three reactors are all tubes. isothermal bed reactor.

[0054] The same reactor operating conditions as in Example 1 were used. The selectivity of the alkylbenzene peroxide in the main reaction is 99.6%, and the conversion rate is 99.5%.

Embodiment 3

[0056] use as image 3 The shown device for reacting alkylbenzene peroxides with low-carbon olefins to generate alkylene oxides reacts alkylbenzene peroxides with low-carbon olefins to generate alkylene oxides. The difference from Example 1 is that the four reactors connected in series are sequentially a tube-and-tube isothermal bed reactor, a tube-and-tube isothermal bed reactor, an adiabatic bed reactor and an adiabatic bed reactor.

[0057] The same reactor operating conditions as in Example 1 were used. The selectivity of the alkylbenzene peroxide in the main reaction is 95%, and the conversion rate is 99.4%.

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Abstract

The invention belongs to the field of alkylene oxide, and discloses a device and a method for generating an alkylene oxide through a reaction of an alkylbenzene peroxide and a low-carbon olefin. The device comprises one or a plurality of reactors connected in series, wherein the reactors comprise an isothermal bed reactor and an optional adiabatic bed reactor, a feeding pipeline containing an alkylbenzene peroxide raw material is divided into one strand or multiple strands of connected reactors, at least one strand is connected to the first reactor, a low-carbon olefin feeding pipeline is connected to the first reactor, the discharge pipeline of the adiabatic bed reactor is connected to a reaction discharge cooler when the adiabatic bed reactor is adopted, and when the isothermal bed reactor is adopted, the isothermal bed reactor is provided with a heat removal medium inlet and outlet pipeline. According to the invention, by using the isothermal bed reactor, the reaction temperature rise is effectively controlled; and by using the multi-point feeding mode, the reactant concentration distribution is uniform, and the generation of hot spots is avoided, so that the performance of thecatalyst is stable, the service life is prolonged, and the reaction selectivity and the product yield are improved.

Description

technical field [0001] The invention belongs to the field of alkylene oxides, and more particularly relates to a device and method for generating alkylene oxides by reacting alkylbenzene peroxides with low-carbon olefins. Background technique [0002] Propylene oxide (PO) is the third largest propylene derivative except polypropylene and acrylonitrile. It is an important basic organic chemical synthesis raw material, mainly used for the production of polyether, propylene glycol, etc. It is also the main raw material of the fourth-generation detergent non-ionic surfactant, oil field demulsifier, pesticide emulsifier, etc. 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 production process of propylene oxide mainly includes chloroalcoholization method, co-oxida...

Claims

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Application Information

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IPC IPC(8): B01J8/04C07D301/19C07D303/04
CPCB01J8/04B01J8/0492C07D301/19C07D303/04
Inventor 杨照徐垚马立国郭晓园张建华
Owner SINOPEC ENG
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