A method for hydrogenation upgrading of inferior catalytic gasoline

A technology for hydrogenation, upgrading and catalytic gasoline, which is applied in the fields of hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc. It can solve the problems of lower octane number, high content of olefins and sulfur in modified gasoline, and reduce the content of diolefins , high aromatization rate, and the effect of extending the operating cycle

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

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Problems solved by technology

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

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  • A method for hydrogenation upgrading of inferior catalytic gasoline
  • A method for hydrogenation upgrading of inferior catalytic gasoline
  • A method for hydrogenation upgrading of inferior catalytic gasoline

Examples

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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 enters the fractionation tower to be cut into three components of light, medium and heavy gasoline. The temperature is 85°C, the tower bottom temperature is 210°C, the medium gasoline fraction accounts for 40% of the raw material, and the heavy gasoline fraction accounts for 20% of the raw material. Medium gasoline is first mixed with hydrogen and enters the first hydrodesulfurization reactor. At a hydrogen partial pressure of 2.2MPa, a reaction temperature of 220°C, and a volumetric space velocity of 2.5h -1 1. Under the reaction conditions of hydrogen oil volume ratio 250:1, use B catalyst to carry out hydrodesulfurization, and t...

Embodiment 2

[0050] The raw material oil that embodiment 2 uses is identical with comparative example 2. 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 10:1 volume ratio of hydrogen to oil, use A catalyst for pretreatment, and then enter the fractionation tower to cut into three components of light, medium and heavy gasoline. The temperature is 75°C, the tower bottom temperature is 202°C, the medium gasoline fraction accounts for 50% of the raw material, and the heavy gasoline fraction accounts for 20% of the raw material. Medium gasoline is first mixed with hydrogen and enters the first hydrodesulfurization reactor. At a hydrogen partial pressure of 2.2MPa, a reaction temperature of 230°C, and a volume space velocity of 3.13h -1 1. Under the reaction conditions of hydrogen oil volume ratio of 300:1, catalyst B is used to carry out hydrodesulfurization, and th...

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, catalyst A is used for pretreatment, and then enters the fractionation tower to be cut into three components of light, medium and heavy gasoline. The temperature is 73°C, the tower bottom temperature is 203°C, the medium gasoline fraction accounts for 47% of the raw material, and the heavy gasoline fraction accounts for 21% of the raw material. Medium gasoline is first mixed with hydrogen and enters the first hydrodesulfurization reactor. At a hydrogen partial pressure of 2.2MPa, a reaction temperature of 240°C, and a volumetric space velocity of 3.0h -1 1. Under the reaction conditions of hydrogen oil volume ratio of 300:1, catalyst B is used to carry out hydrode...

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Abstract

The invention discloses a method for hydro-upgrading inferior catalytic gasoline. The method comprises the following steps: (1) mixing catalytic gasoline and hydrogen and feeding the mixture into a pre-hydrogenating reactor; (2) feeding a product of the step (1) into a fractionating tower and dividing the product into a light gasoline component, a medium gasoline component and a heavy gasoline component; (3) taking the light gasoline component discharged from the top of the fractionating tower as an upgraded gasoline blending component, mixing the medium gasoline component discharged from a side line and the hydrogen, feeding the mixture into a first hydrogen desulfurization reactor, reacting and then returning the product to the fractionating tower; (4) mixing the heavy gasoline component discharged from the bottom of the fractionating tower and the hydrogen, 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 on the top, 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): C10G67/00
CPCC10G67/00
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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