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A method for hydrogenation and upgrading of low-quality gasoline

A technology of hydrogenation reforming and low-quality gasoline, which is applied in the fields of hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc. It can solve the problems of high olefin and sulfur content and lower octane number of modified gasoline, and achieve the content of diolefins Reduce, reduce mercaptan content, increase the effect of cutting ratio

Active Publication Date: 2018-10-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The main purpose of the present invention is to provide a method for hydrogenation upgrading of low-quality gasoline, so as to overcome the defects in the prior art that the octane number decreases more during the gasoline upgrading process and the olefin and sulfur content of the modified gasoline are higher

Method used

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  • A method for hydrogenation and upgrading of low-quality gasoline
  • A method for hydrogenation and upgrading of low-quality gasoline
  • A method for hydrogenation and upgrading of low-quality gasoline

Examples

Experimental program
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Embodiment 1

[0048] The raw material oil that embodiment 1 uses is identical with comparative example 1. Catalyzed gasoline is first heated at a hydrogen partial pressure of 2.2Mpa, a reaction temperature of 110°C, and a volumetric space velocity of 3.0h -1 , Under the condition of hydrogen oil volume ratio of 10:1, catalyst A is used for pretreatment, and then mixed with hydrogen and then enters the first hydrodesulfurization reactor. -1 , Under the reaction conditions of 250:1 volume ratio of hydrogen to oil, use B catalyst to carry out hydrodesulfurization, and then enter the fractionation tower to cut into two components of light and heavy gasoline. 83°C, tower bottom temperature 207°C, heavy gasoline fraction accounts for 60% of the raw material. Heavy gasoline is first mixed with hydrogen and enters the hydroreforming reactor at a hydrogen partial pressure of 2.0MPa, a reaction temperature of 370°C, and a volumetric space velocity of 1.22h -1 , Under the reaction conditions of 250:...

Embodiment 2

[0050] The raw material oil that embodiment 2 uses is identical with comparative example 1. Catalyzed gasoline is first heated at a hydrogen partial pressure of 2.2Mpa, a reaction temperature of 120°C, and a volumetric space velocity of 3.0h -1 , Under the condition of hydrogen oil volume ratio of 10:1, use catalyst A for pretreatment, then mix with hydrogen and enter the first hydrodesulfurization reactor. -1 , Under the reaction conditions of hydrogen oil volume ratio 300:1, use B catalyst to carry out hydrodesulfurization, and then enter the fractionation tower to cut into two components of light and heavy gasoline. 74°C, tower bottom temperature 201°C, heavy gasoline fraction accounts for 70% of the raw material. Heavy gasoline is first mixed with hydrogen and enters the hydroreforming reactor at a hydrogen partial pressure of 2.0MPa, a reaction temperature of 380°C, and a volumetric space velocity of 1.5h -1 , Under the reaction conditions of 300:1 volume ratio of hydro...

Embodiment 3

[0052] The raw material oil used in embodiment 3 is shown in the catalytic gasoline 2 listed in table 1. Catalyzed gasoline is first heated at a hydrogen partial pressure of 2.2Mpa, a reaction temperature of 120°C, and a volumetric space velocity of 3.0h -1 , Under the condition of hydrogen oil volume ratio of 10:1, use catalyst A for pretreatment, then mix with hydrogen and enter the first hydrodesulfurization reactor. -1 , Under the reaction conditions of hydrogen oil volume ratio 300:1, use B catalyst to carry out hydrodesulfurization, and then enter the fractionation tower to cut into two components of light and heavy gasoline. 74°C, tower bottom temperature 205°C, heavy gasoline fraction accounts for 65% of the raw material. Heavy gasoline is first mixed with hydrogen and enters the hydroreforming reactor at a hydrogen partial pressure of 2.0MPa, a reaction temperature of 380°C, and a volumetric space velocity of 1.5h -1 , Under the reaction conditions of 300:1 volume r...

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Abstract

The invention discloses a method for hydro-upgrading inferior gasoline. The method comprises the following steps: (1) mixing catalytic gasoline and hydrogen, feeding the mixture into a pre-hydrogenating reactor and reacting; (2) mixing a pre-hydrogenated product and hydrogen, feeding the mixture into a first hydrogen desulfurization reactor and reacting; (3) feeding the product of the step (2) into a fractionating tower, and dividing the product into a light gasoline component and a heavy gasoline component; (4) taking the light gasoline component discharged from the top of the fractionating tower gas an upgraded gasoline blending component, mixing the heavy gasoline component discharged from the bottom of the tower and hydrogen, then feeding the mixture into a hydro-upgrading reactor and reacting; (5) feeding the product of the step (4) into a second hydrogen desulfurization reactor and reacting; and (6) after the product of the step (5) is cooled down, feeding the product into a product separator and carrying out gas-liquid separation, recycling the hydrogen discharged from the top of the product separator, feeding a liquid phase at the bottom into a stabilizer to remove sulfurous gas, and mixing the liquid phase with light gasoline to obtain the upgraded gasoline product. According to the method, while the content of olefin and the content of sulphur are greatly reduced, loss of octane value in hydro-upgrading of the catalytic gasoline is reduced.

Description

technical field [0001] The invention relates to a method for hydrogenation upgrading of inferior catalytic cracking gasoline, which is used for reducing the content of sulfur and olefins in the catalytic gasoline and reducing the loss of octane number. Background technique [0002] In recent years, smog has occurred frequently in my country, and 70% of the cities in the country have substandard air quality. Vehicle exhaust emissions are one of the important sources of smog in large and medium-sized cities. The upgrading of gasoline quality has become an important measure to reduce vehicle exhaust emissions. More than 70% of motor gasoline in my country is FCC gasoline, which has the characteristics of high sulfur and olefin content. Therefore, the key to upgrading gasoline quality is to reduce the sulfur and olefin content in catalytic gasoline; The main contributor, the use of conventional hydrodesulfurization and olefin reduction technology will greatly lose the octane numb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/1037C10G2300/104C10G2300/1044C10G2300/20C10G2300/202C10G2300/70C10G2400/02
Inventor 钟海军吕忠武兰玲鞠雅娜李阳姜增琨葛少辉赵秦峰张学军李天舒袁晓亮刘坤红康宏敏侯远东王书芹
Owner PETROCHINA CO LTD
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