Method for producing propylene epoxide by trickle bed reactor

A technology of propylene oxide and reactor, which is applied in the field of propylene oxide production, can solve the problems of high selectivity, inability to meet environmental protection, environmental pollution, etc. at the same time, and achieve high selectivity, high utilization rate of raw materials, and good selectivity Effect

Inactive Publication Date: 2016-02-17
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The above-mentioned published patents have their own deficiencies in terms of process system energy consumption, environmental pollution, material recovery, production efficiency, etc., and cannot meet the needs of environmental protection and high selectivity at the same time.

Method used

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  • Method for producing propylene epoxide by trickle bed reactor

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, under the conditions of 55°C and 0.1 MPa, the raw material propylene flows out from the raw material gas storage tank 5 and enters from the lower end of the trickle bed reactor 2, and the mixed liquid of solvent alcohol and hydrogen peroxide flows out from the mixed liquid storage tank 1, and flows out from the trickle bed reactor 2. The upper end of the bed reactor 2 is passed into, and the inside of the trickle bed reactor 2 is coated with Au / TiO 2 -SiO 2 Catalyst packing, with multi-layer flaps inside, the filler fills the space between the flaps and the inner wall of the trickle bed reactor, propylene and hydrogen peroxide in Au / TiO 2 -SiO 2 Reaction in the catalyst bed, the reaction gas space velocity is 200h -1 , the reaction product is successively subjected to low-temperature condensation in condenser 3 (the temperature of low-temperature condensation is 1° C.), and gas-liquid separator 4 separates to obtain product propylene oxide,...

Embodiment 2

[0027] Such as figure 1 As shown, under the conditions of 35°C and 0.3 MPa, the raw material propylene flows out from the raw material gas storage tank 5, and passes into the lower end of the trickle bed reactor 2, and the mixed solution of solvent alcohol and hydrogen peroxide flows out from the mixed liquid storage 1, and flows out from the trickle The upper end of the bed reactor 2 is passed into, and the inside of the trickle bed reactor 2 is coated with Ag / TiO 2 -SiO 2 Catalyst packing, with multi-layer folded plates inside, the filler fills the space between the folded plates and the inner wall of the trickle bed reactor, propylene and hydrogen peroxide in Ag / TiO 2 -SiO 2 Reaction in the catalyst bed, the reaction gas space velocity is 200h -1 , the reaction product is successively subjected to low-temperature condensation in condenser 3 (the temperature of low-temperature condensation is 5° C.), and gas-liquid separator 4 separates to obtain product propylene oxide, ...

Embodiment 3

[0029] Such as figure 1 As shown, under the conditions of 55°C and 0.01MPa, the raw material propylene flows out from the raw material gas storage tank 5 and enters from the lower end of the trickle bed reactor 2, and the mixed liquid of solvent alcohol and hydrogen peroxide flows out from the mixed liquid storage 1, and flows out from the trickle bed reactor 2. The upper end of the bed reactor 2 is passed into, and the inside of the trickle bed reactor 2 is coated with Ag / TiO 2 -SiO 2 Catalyst packing, with multi-layer flaps inside, the filler fills the space between the flaps and the inner wall of the trickle bed reactor, propylene and hydrogen peroxide in Pd / TiO 2 -SiO 2 Reaction in the catalyst bed, the reaction gas space velocity is 350h -1, the reaction product is successively subjected to low-temperature condensation in condenser 3 (the temperature of low-temperature condensation is 10° C.), and gas-liquid separator 4 separates to obtain product propylene oxide, the ...

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Abstract

The invention discloses a method for producing propylene epoxide by a trickle bed reactor. The method comprises steps as follows: a raw material, namely, propylene, flows out of a raw gas storage tank (5) under the conditions of the temperature ranging from 35 DEG C to 75 DEG C and the pressure ranging from 0 to 0.5 MPa and is introduced from the lower end of the trickle bed reactor (2), a solvent alcohol and hydrogen peroxide mixed liquid flows out of a mixed liquid storage device (1) and is introduced from the upper end of the trickle bed reactor (2), a reaction product is sequentially subjected to low temperature condensation by a condenser (3) and separation by a gas-liquid separator (4), and a product, namely, propylene epoxide, is obtained. With the adoption of the reaction device for propylene epoxidation, the conversion rate of propylene and the selectivity of propylene epoxide can be up to 60% and 99%. When the method is adopted to produce propylene epoxide, the reaction conditions are mild, the product selectivity is high, and pollution is avoided.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a method for producing propylene oxide by using a trickle bed reactor. Background technique [0002] Propylene oxide is an important organic chemical raw material and the third largest propylene derivative after polypropylene and acrylonitrile. It is mainly used in the production of polyether, propylene glycol, propylene glycol ether, etc. It is also an important raw material for the fourth generation of detergent nonionic surfactants, oil field demulsifiers, and pesticide emulsifiers. Propylene oxide derivatives are also widely used in food, tobacco, pesticide and cosmetic industries, and the annual demand is more than 7.5 million tons. [0003] At present, there are two main methods for the industrial production of propylene oxide: the chlorohydrin method and the Halcon co-oxidation method. At present, the propylene oxide produced by these two methods accounts for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/04C07D301/12C07D301/32
CPCY02P20/52C07D303/04C07D301/12C07D301/32
Inventor 菅盘铭傅丽凤孙程超孙运林徐俊
Owner YANGZHOU UNIV
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