Reaction system and method for preparing ethylene through hydrogenation of acetylene

A technology of acetylene hydrogenation and reaction system, which is applied in the fields of hydrogenation to hydrocarbons, chemical recovery, organic chemistry, etc. It can solve the problems of low reaction pressure in slurry bed, difficulty in heat transfer of reaction heat, affecting catalyst activity, etc., and achieves stable state, Reduce safety hazards and increase operational flexibility

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 purpose of the present invention is to provide a reaction system and method for hydrogenation of acetylene to ethylene, so as to solve the problem of high-purity acetylene hydrogenation to ethylene 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 preparing ethylene through hydrogenation of acetylene
  • Reaction system and method for preparing ethylene through hydrogenation of acetylene

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Such as figure 2 As shown, a system for high-purity acetylene hydrogenation to ethylene is characterized in that the system includes a hydrogenation mixing unit 5, a hydrogenation reaction unit, a cryogenic separation unit 4, a vacuum filtration unit 7, and a rotating bed regeneration unit 6 and vacuum low pressure distillation 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 be...

Embodiment 2

[0063] Adopt the system of embodiment 1, the technology of high-purity acetylene hydrogenation ethylene is:

[0064] The catalyst diluent aluminum oxide with a particle size of 100 mesh to 150 mesh and the acetylene hydrogenation catalyst are mixed uniformly at a mass ratio of 2:1 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 20KPa, 40°C acetylene with 0.44MPa, 5°C hydrogen at a molar ratio of 1:6 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 the rotary drum vacuum filter to obtain solid phase material and liquid phase material. The solid phase material is...

Embodiment 3

[0066] Adopt the system of embodiment 1, the technology of high-purity acetylene hydrogenation ethylene 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, 10°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 preparing ethylene through hydrogenation of acetylene. The system comprises a hydrogen and acetylene mixing and pressure equalizing unit, a hydrogenation reaction unit, a cryogenic separation unit, a vacuum filtering unit, a revolving bed regeneration unit and a vacuum low-pressure distillation unit. The method comprises the steps that acetylene and hydrogen are mixed in a pressure equalizing mode through the hydrogen and acetylene mixing and pressure equalizing unit; mixed acetylene and hydrogen are introduced into the hydrogenation reaction unit for a reaction; a gas-phase product generated in the hydrogen and acetylene reaction is subjected to cryogenic separation through the cryogenic separation unit, the product ethylene and excessive hydrogen are obtained, and excessive hydrogen is fed into the hydrogen and acetylene mixing and pressure equalizing unit; slurry in a slurry reactor is led out and separated through the vacuum filtering unit, and a solid phase material and a liquid phase material are obtained; the solid phase material is treated through the revolving bed regeneration unit, and a generation catalyst is obtained; the liquid phase material is treated through the vacuum low-pressure distillation unit for solvent recycling. The reaction system and method for preparing ethylene through hydrogenation of acetylene have the advantages that operation flexibility is high, and the adaptability to the catalyst is high.

Description

technical field [0001] The present invention generally relates to a reaction system and method for producing ethylene, and in particular to a reaction system and method for producing ethylene by hydrogenation of acetylene. 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, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C5/09C07C11/04
CPCY02P20/584C07C5/09C07C11/04
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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