Method for inferior gasoline modification

A low-quality gasoline and gasoline technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve problems such as large octane loss, achieve small octane loss, reduce olefin content, and avoid dry point indicators The effect of exceeding the standard

Active Publication Date: 2012-08-15
PETROCHINA CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

The patented hydrofinishing uses traditional hydrofinishing catalysts, resulting in a large loss of octane number

Method used

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  • Method for inferior gasoline modification
  • Method for inferior gasoline modification

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Embodiment 1

[0028] The raw material oil that embodiment 1 uses is identical with comparative example. Catalytic gasoline is pretreated under the conditions of hydrogen partial pressure of 2.2Mpa and temperature of 160°C, and then enters the fractionating tower to be cut into three components of light, medium and heavy gasoline. The fraction of medium gasoline accounts for 40% of the raw material, and the fraction of heavy gasoline accounts for 15%. Medium gasoline is firstly mixed with hydrogen into the hydro-upgrading reactor, under the reaction conditions of hydrogen partial pressure of 2.0MPa and reaction temperature of 380°C, the hydro-upgrading is carried out, and then mixed with heavy gasoline into the hydrodesulfurization reactor under the hydrogen partial pressure Supplementary refining is carried out under the conditions of 1.8MPa and 258°C. The supplementary refined product is stabilized by the stabilizing tower and mixed with light gasoline to obtain a clean gasoline product. ...

Embodiment 2

[0030] The raw material oil that embodiment 2 uses is identical with comparative example. Catalytic gasoline is pretreated under the conditions of hydrogen partial pressure of 2.2Mpa and temperature of 160°C, and then enters the fractionating tower to be cut into three components of light, medium and heavy gasoline. Medium gasoline fraction accounts for 50% of the raw material, and heavy gasoline fraction accounts for the raw material. 15%. Medium gasoline is firstly mixed with hydrogen into the hydro-upgrading reactor, under the reaction conditions of hydrogen partial pressure of 2.0MPa and reaction temperature of 380°C, the hydro-upgrading is carried out, and then mixed with heavy gasoline into the hydrodesulfurization reactor under the hydrogen partial pressure Supplementary refining is carried out under the conditions of 1.8MPa and 272°C. The supplementary refined product is stabilized by the stabilizing tower and mixed with light gasoline to obtain a clean gasoline produ...

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Abstract

The invention relates to a method for inferior gasoline modification; gasoline raw materials and hydrogen are mixed, and the mixture is allowed to enter a prehydrogenation reactor for dialkene removal; the prehydrogenation products are allowed to enter a fractionating tower so as to cut the gasoline into light, medium, and heavy components; light gasoline from the tower top is directly used as a clean gasoline blending component; the medium gasoline component from the lower section of the fractionating tower is allowed to enter a hydrogenation modification reactor firstly for reactions such as aromatization, isomerization, and the like, then to mix with heavy gasoline from the bottom of the fractionating tower and to enter a hydrodesulfurization reactor; materials from the hydrodesulfurization reactor is cooled, and is allowed to enter a product separation device for gas-liquid separation; hydrogen from the gas-liquid separation device is treated by desulphurization and then recycled; liquid products enter a product stabilization tower to remove light hydrocarbon and hydrogen sulfide generated during the reaction, and then are mixed with the light gasoline to obtain the modified gasoline products; the method of the invention can greatly reduce sulfur and alkene contents in gasoline, and can reduce octane number loss due to the modification process.

Description

technical field [0001] The invention relates to a method for upgrading low-quality gasoline, in particular to a method for hydrogenating and upgrading secondary processed gasoline such as catalytic cracking gasoline. Background technique [0002] In recent years, in order to protect the environment, countries around the world have put forward stricter restrictions on the composition of engine fuel in order to reduce the emission of harmful substances. Beijing implemented the Beijing local standard DB11 / 238-2007 for motor gasoline on January 1, 2008. The standard stipulates that the sulfur content of motor gasoline should not exceed 0.005% (m / m), and the olefin content should not exceed 30%. It is expected that Beijing will implement the National V standard in 2012, stipulating that the sulfur content of motor gasoline shall not exceed 0.001% (m / m), and the olefin content shall not exceed 25%. The proportion of FCC gasoline in my country's motor gasoline accounts for more th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 张学军兰玲李文乐鞠雅娜袁晓亮侯远东孙洪磊钟海军陈烈杭吴平易赵秦峰马健波
Owner PETROCHINA CO LTD
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