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Reaction system and method for producing ethylene through catalyst regeneration

A catalyst, ethylene technology, applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low reaction pressure in slurry bed, difficult heat transfer of reaction heat, affecting catalyst activity, etc. Achieve the effect of online regeneration, reducing security risks and stable state

Inactive Publication Date: 2016-08-17
霍尔果斯道科特环能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a reaction system and method for producing ethylene with catalyst regeneration, so as to solve the problem of high-purity acetylene hydrogenation for ethylene production in the traditional method. The problem of low pressure and small production capacity of the state bed reaction and the accumulation of green oil and the problem of affecting the activity of the catalyst

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  • Reaction system and method for producing ethylene through catalyst regeneration
  • Reaction system and method for producing ethylene through catalyst regeneration

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Such as figure 2 As shown, a system for producing ethylene with catalyst regeneration is characterized in that the system includes a hydroalkyne mixing and equalizing unit 5, a hydrogenation reaction unit, a cryogenic separation unit 4, a vacuum filtration unit 7, and a fluidized bed regeneration unit 6 And membrane separation unit 8.

[0057] The hydrogenation reaction unit includes a slurry bed 1, a slurry bed temperature control device 9, and a gas-liquid condensation separation device 3. The slurry bed is provided with a mixed gas inlet 16, a gas product outlet 10, a condensate inlet 11, a slurry Outlet 15 and heat exchange medium inlet and outlet 12, 13, the mixed gas inlet 16 is connected to the mixed gas outlet of the hydrogen acetylene mixing and equalizing unit, the slurry outlet 15 is connected to the vacuum filtration unit 7, and the temperature control device 9 is equipped with a The heat medium inlet and outlet are respectively connected to the slurry bed...

Embodiment 2

[0063] Adopt the system of embodiment 1, the technology of the ethylene making of catalyst regeneration is:

[0064] The catalyst diluent aluminum oxide with a particle size of 100 mesh to 120 mesh and the acetylene hydrogenation catalyst are mixed uniformly at a mass ratio of 3:1 to form a solid phase material, and then added to the slurry bed and mixed with the solvent tetrahydrofuran to form a slurry. Mix 15KPa, 40°C acetylene with 0.44MPa, 25°C hydrogen at a molar ratio of 1:9 through a Venturi mixer to form a mixed gas. The mixed gas enters the slurry through the internal gas distributor of the slurry bed and reacts at 90°C. After the reaction, the gas phase material is subjected to cryogenic separation to obtain the target product ethylene, and the recovered hydrogen is mixed with the raw material hydrogen. The liquid phase material is passed through the rotary drum vacuum filter to obtain solid phase material and liquid phase material. The solid phase material is sent...

Embodiment 3

[0066] Adopt the system of embodiment 1, the technology of the ethylene making of catalyst regeneration is:

[0067] The catalyst diluent perlite particles with a particle size of 100 mesh to 150 mesh and the acetylene hydrogenation catalyst are mixed uniformly at a ratio of 10:1 to form a solid phase material, and then added to the slurry bed and mixed with the solvent N-methyl pyrrolidone to form a slurry. Mix 40KPa, 80°C acetylene with 2.2MPa, 40°C hydrogen at a molar ratio of 1:15 through a Venturi mixer to form a mixed gas. The mixed gas enters the slurry through the internal gas distributor of the slurry bed and reacts at 170°C. After the reaction, the gas phase material is subjected to cryogenic separation to obtain the target product ethylene, and the recovered hydrogen is mixed with the raw material hydrogen. The liquid phase material is passed through a belt vacuum filter to obtain solid phase material and liquid phase material. The solid phase material is sent to ...

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Abstract

The invention relates to a reaction system and method for producing ethylene through catalyst regeneration. The system comprises a hydrogen-ethyne mixing and pressure-equalizing unit, a hydrogenation reaction unit, a cryogenic separation unit, a vacuum filtration unit, a fluidized bed regeneration unit and a membrane separation unit. The method comprises the steps of conducting pressure-equalizing and mixing on ethyne and hydrogen through the hydrogen-ethyne mixing and pressure-equalizing unit; introducing the mixed ethyne and hydrogen into the hydrogenation reaction unit for a reaction; conducting cryogenic separation on a gaseous product obtained after the ethyne-hydrogen reaction through the cryogenic separation unit, so that products ethylene and surplus hydrogen are obtained, and sending the surplus hydrogen into the hydrogen-ethyne mixing and pressure-equalizing unit; guiding slurry in a slurry bed out, and conducing separation through the vacuum filtering unit, so that a solid phase material and a liquid phase material are obtained; treating the solid phase material through the fluidized bed regeneration unit, so that a regenerated catalyst is obtained; treating the liquid phase material through the membrane separation unit, and recycling solvent. The reaction system and method have the advantages of being high in operation flexibility and great in catalyst adaptive capacity.

Description

technical field [0001] The present invention generally relates to a reaction system and method for producing ethylene, in particular to a reaction system and method for producing ethylene with catalyst regeneration. Background technique [0002] Ethylene is a major raw material in the petrochemical industry. The current preparation process is mainly through the cracking of naphtha to produce olefins and coal to olefins. In 2015, the total domestic ethylene production capacity reached about 22 million t / a. In 2020, the domestic ethylene production capacity will further increase to 32.5 million t / a. However, the domestic ethylene consumption is expected to be 48 million tons per year in 2020, and the demand will exceed productivity phenomenon. This poses a serious strategic threat to our country, which is not rich in oil reserves. Therefore, seeking another new source and process to prepare ethylene, which can replace petroleum in the field of industrial production, can larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C5/09C07C11/04B01J38/10
CPCY02P20/584C07C5/09B01J38/10C07C11/04
Inventor 余海鹏史雪君苏二强吴黎阳吴道洪
Owner 霍尔果斯道科特环能科技有限公司
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