Method for producing epoxide by adopting suspended bed reactor

A technology of epoxy and reactor, applied in chemical instruments and methods, chemical/physical processes, organic chemistry, etc., can solve the problem of uneven distribution of reactants and heat, difficulty in catalyst loading, poor mass transfer and heat transfer efficiency, etc. problems, to avoid local overheating of the reaction, good mass and heat transfer effects, and convenient loading and unloading

Pending Publication Date: 2021-04-06
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at problems such as high difficulty in catalyst loading, poor mass and heat transfer efficiency, uneven distribution of reactants and heat leading to catalyst deactivation and catalyst regeneration requiring partial device shutdown in the existing epoxidation production technology, and develops a suspension bed Process for the production of epoxides in a reactor

Method used

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  • Method for producing epoxide by adopting suspended bed reactor
  • Method for producing epoxide by adopting suspended bed reactor
  • Method for producing epoxide by adopting suspended bed reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] like figure 1 As shown, the suspended bed reactor has a cylinder diameter of 55 mm and a height of 100 mm. The premixing section (1) is provided with a baffle, and the distributor is a silicon carbide sintered plate with a porosity of 35% and a pore diameter of 90 μm; the cylinder diameter of the reaction section is 55 mm , height 600mm, catalyst inlet and catalyst outlet are located at 50mm above and below the reaction section respectively, a single set of serpentine heat exchange coils are installed in the reaction section, with a diameter of 6mm and a height of 350mm; the diameter of the separation section is 90mm and a height of 100mm , The filter pore size of the position separation component is 20 μm.

[0032] The microsphere TS-1 catalyst that 210g diameter is about 100 μm is packed into reactor reaction section by vacuum feed pump, and TS-1 content is 85wt% in the catalyzer; Propylene, hydrogen peroxide (50wt%) and methanol solvent enter from the reactor The fe...

Embodiment 2

[0041] Suspended bed reactor is with embodiment 1;

[0042] The microsphere TS-1 catalyst that 210g diameter is left and right sides of 100 μ m is packed into reactor reaction section by feeding pump, and TS-1 content is 85wt% in the catalyzer; 1-butene, hydrogen peroxide (50wt%) and methanol solvent from the The feed port enters, the premixing section enters the reaction section through the distribution plate after mixing, the heat generated by the reaction is removed from the reaction area through the built-in heat exchange component, and the reaction temperature is maintained between 35-45°C; after the reaction, the material enters the separation section and is separated from the catalyst Then it flows out from the discharge port, the catalyst stays in the reaction section, the molar ratio of 1-butene, methanol and hydrogen peroxide (50wt%) is 1:2.9:0.18, and the linear velocity of the material flowing in the reaction section is 0.39m / h. Product and raw material analysis ar...

Embodiment 3

[0046] Suspended bed reactor is with embodiment 1;

[0047] 210g of microsphere TS-1 catalysts with a diameter of about 100 μm are loaded into the reactor reaction section by a vacuum feed pump, and the TS-1 content in the catalyst is 85wt%; 1-butene, hydrogen peroxide (50wt%) and methanol solvent from the reaction The feed port of the pre-mixing section enters the reaction section through the distribution plate after mixing in the pre-mixing section. The heat generated by the reaction is moved out of the reaction zone through the built-in heat exchange component, and the reaction temperature is maintained between 38-45°C; After the catalyst is separated, it flows out from the discharge port, and the catalyst stays in the reaction section. The molar ratio of 1-butene, methanol and hydrogen peroxide (50wt%) is 1:6.3:0.25, and the linear velocity of the material flowing in the reaction section is 0.39m / h. Product and raw material analysis are the same as in Example 1. The resul...

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Abstract

The invention relates to a method for producing epoxide by adopting a suspended bed reactor, and solves the problems of low reaction heat removal efficiency and high catalyst replacement difficulty in an epoxidation reaction process in the prior art. The method comprises the following steps: premixing olefin, a solvent and an oxidizing agent uniformly, enabling the mixture to enter a catalyst bed layer through a distributor, and enabling a catalyst to be suspended to form a catalyst suspension bed layer through material flowing, wherein the temperature of a reaction zone is 25-80 DEG C; enabling a reaction product, a solvent and water to upwards enter a subsequent separation unit to obtain epoxide, wherein the molar ratio of the olefin to the solvent to the hydrogen peroxide is 1: (1-20): (0.2-1), the linear velocity of the reaction material in the reaction section is 0.2-2.0 m/h, and the filling volume of the catalyst in the reaction section is 20-60% of the volume of the reaction section. According to the technical scheme, the epoxidation reaction can be efficiently, continuously and stably carried out.

Description

technical field [0001] The invention relates to a method for producing epoxides by epoxidation of olefins, in particular to a method for producing epoxides using a suspended bed reactor. Background technique [0002] Epoxy compounds are a class of organic synthesis intermediates with a wide range of uses. The epoxidation of alkenes is the most important route to the formation of epoxides. The traditional method of producing epoxides from olefins is the chlorohydrin method. This process is well developed and the product selectivity is high. However, a large amount of chlorine-containing wastewater and waste residues are produced during the production process. At the same time, hypochlorous acid severely corrodes equipment; Epoxide overcomes the shortcomings of large pollution and equipment corrosion in the chlorohydrin method, but it requires high purity of olefin raw materials and lengthy process flow. The process of catalyzing olefin epoxidation to epoxide with hydrogen p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/00B01J8/02C07D303/04C07D301/12C07D301/19
CPCB01J8/025B01J8/0278B01J8/0285B01J8/0292B01J8/0085B01J8/006B01J8/0015B01J8/001C07D303/04C07D301/12C07D301/19
Inventor 臧甲忠宋万仓郭春垒于海斌刘冠锋洪鲁伟李晨费亚南
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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