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Method for preparing epoxypropane through direct epoxidation of propylene

A technology of epoxidation and epoxidation reaction, applied in the direction of organic chemistry, etc., can solve the problem of short service life of the catalyst, and achieve the effect of prolonging the service life, no risk of explosion and reducing energy consumption

Pending Publication Date: 2022-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for the direct epoxidation of propylene to prepare propylene oxide in order to overcome the short service life of the catalyst in the existing propylene epoxidation technology

Method used

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  • Method for preparing epoxypropane through direct epoxidation of propylene
  • Method for preparing epoxypropane through direct epoxidation of propylene
  • Method for preparing epoxypropane through direct epoxidation of propylene

Examples

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Effect test

Embodiment 1

[0076] This embodiment is used to illustrate the method for the direct epoxidation of propylene provided by the invention

[0077] In a tubular reactor, relative to a 10ml reactor, 0.20g of Au@TS-1 molecular sieve catalyst (the loading of Au is 1% by weight) and 20g of quartz sand were layered into the reactor, as shown in the attached Figure 5 Shown in (c), wherein, the layer height ratio of the catalyst layer and the quartz sand layer is 1:2, and the catalyst layer and the inert filler layer are each independently 15 layers / cm, and carry out the direct epoxidation reaction of propylene gas phase .

[0078] Among them, raw material gas H 2 , O 2 、C 3 h 6 , Propane enters the mixer and mixes and then enters the preheater, preheats to 160°C and then enters the tubular reactor, the reaction space velocity is 9000ml g cat -1 h -1 , the reaction pressure of the control system is 0.15MPa, at 0.8℃min -1 The speed program was heated up to 200°C, and after the reaction was st...

Embodiment 2

[0080] This embodiment is used to illustrate the method for the direct epoxidation of propylene provided by the invention

[0081] In a tubular reactor, relative to a 10ml reactor, 0.20g of Au@TS-1 molecular sieve catalyst (the loading of Au was 1% by weight) and 18g of quartz sand were layered into the reactor, as shown in the attached Figure 5 As shown in middle (c), wherein, the layer height ratio of the catalyst layer and the quartz sand layer is 1:1.5, and the catalyst layer and the inert filler layer are each independently 10 layers / cm, and the gas phase direct epoxidation reaction of propylene is carried out .

[0082] Among them, raw material gas H 2 , O 2 、C 3 h 6 , Propane enters the mixer and mixes and then enters the preheater, preheats to 130°C and then enters the tubular reactor, the reaction space velocity is 15000ml g cat -1 h -1 , the reaction pressure of the control system is 0.05MPa, at 1.5℃min -1 The speed program was heated up to 170°C, and after ...

Embodiment 3

[0084] This embodiment is used to illustrate the method for the direct epoxidation of propylene provided by the invention

[0085] In a tubular reactor, relative to a 10ml reactor, 0.20g of Au@TS-1 molecular sieve catalyst (the loading of Au is 1% by weight) and 22g of quartz sand were layered into the reactor, as shown in the attached Figure 5 In (c), wherein, the layer height ratio of the catalyst layer and the quartz sand layer is 1:2.5, and the catalyst layer and the inert filler layer are each independently 20 layers / cm, and the gas phase direct epoxidation reaction of propylene is carried out .

[0086] Among them, raw material gas H 2 , O 2 、C 3 h 6, Propane enters the mixer and mixes and then enters the preheater, preheats to 100°C and then enters the tubular reactor, the reaction space velocity is 2000ml g cat -1 h -1 , the reaction pressure of the control system is 0.25MPa, at 1.2℃min -1 The speed program was raised to 120 DEG C, and after the reaction was s...

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Abstract

The invention relates to the field of preparation of epoxypropane, and discloses a method for preparing epoxypropane through direct epoxidation of propylene. The method comprises the following steps: under the condition of propylene epoxidation reaction, carrying out contact reaction on mixed gas of reaction raw material gas and diluent gas and a catalyst to obtain epoxypropane, wherein the reaction raw material gas comprises propylene, oxygen and hydrogen, and the diluent gas is propane. The propylene epoxidation reaction is carried out by taking the propane as the diluent gas, so that the service lifetime of the catalyst is remarkably prolonged, and the reaction selectivity and the propylene conversion rate are also improved.

Description

technical field [0001] The invention relates to the field of propylene oxide preparation, in particular to a method for preparing propylene oxide by direct epoxidation of propylene. Background technique [0002] Propylene oxide, also known as propylene oxide and methyl oxirane, is a very important organic compound raw material and the third largest propylene derivative after polypropylene and acrylonitrile. Propylene oxide is a colorless ether-like liquid with a low boiling point and is flammable. There is chirality, and the industrial product is generally a racemic mixture of two enantiomers. Partially miscible with water, miscible with ethanol and ether. It forms a binary azeotrope with pentane, pentene, cyclopentane, cyclopentene and methylene chloride. [0003] Propylene oxide is mainly used in the production of polyether polyols, propylene glycol and various nonionic surfactants, among which polyether polyols are important raw materials for the production of polyuret...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/04C07D301/06
CPCC07D303/04C07D301/06Y02P20/52
Inventor 赵辰阳杨哲孙冰朱红伟王浩志
Owner CHINA PETROLEUM & CHEM CORP
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