Method for gasoline hydrogenation modification

A gasoline hydrogenation and upgrading technology, applied in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve problems such as large loss of octane number, achieve small loss of octane number, reduce olefin content, and improve aromatization. The effect of high conversion rate

Active Publication Date: 2014-08-06
PETROCHINA CO LTD
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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 gasoline hydrogenation modification

Examples

Experimental program
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Effect test

Embodiment 1

[0027]The raw material oil that embodiment 1 uses is identical with comparative example. Catalytic gasoline first enters the catalytic distillation tower, reacts under the conditions of tower top pressure 0.75Mpa, feed temperature 145°C, tower top temperature 90°C, tower bottom temperature 205°C, and is cut into two components of light and heavy gasoline, and heavy gasoline fraction It accounts for 65% of raw materials. Heavy gasoline is first mixed with hydrogen into the hydro-upgrading reactor, under the reaction conditions of hydrogen partial pressure of 2.0MPa and reaction temperature of 385°C for hydro-upgrading, and then into the hydrodesulfurization reactor under the conditions of hydrogen partial pressure of 1.8MPa, 252 ℃ for hydrodesulfurization. The desulfurized product then enters the desulfurization tower, and further reduces the mercaptan content of gasoline under the conditions of hydrogen partial pressure 1.8Mpa, feed temperature 300°C, tower top temperature 26...

Embodiment 2

[0029] The raw material oil that embodiment 2 uses is identical with comparative example. Catalytic gasoline first enters the catalytic distillation tower and reacts under the conditions of tower top pressure 0.75Mpa, feed temperature 145°C, tower top temperature 90°C, tower bottom temperature 205°C, and is cut into two components of light and heavy gasoline at the same time. 65% of raw material. Heavy gasoline is first mixed with hydrogen into the hydro-upgrading reactor, under the reaction conditions of hydrogen partial pressure ℃ for hydrodesulfurization. After desulfurization, the product enters the sweetening tower. Under the conditions of hydrogen partial pressure of 1.8Mpa, feed temperature of 300°C, tower top temperature of 260°C, tower bottom temperature of 350°C, and hydrogen-to-oil volume ratio of 50, the mercaptan content of gasoline is further reduced and fractionated. The light gasoline from the top of the tower is mixed to obtain a modified gasoline product. ...

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Abstract

The invention relates to a method for gasoline hydrogenation modification; gasoline raw materials and hydrogen are mixed, and the mixture is allowed to enter a catalytic distillation tower for dialkene removal, and then to cut the gasoline into light and heavy components; light gasoline from the catalytic distillation tower top is directly used as a clean gasoline blending component; heavy gasoline from the bottom of the tower is allowed to enter a hydrogenation modification reactor for reactions such as aromatization, isomerization, and the like, and then to enter a hydrodesulfurization reactor for supplementary refining; 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 are allowed to enter a desulfurization tower for further reducing the mercaptan content of the gasoline, and then are mixed with the light gasoline to obtain the hydrogenation modified gasoline products; the method of the invention can not only greatly reduce sulfur and alkene contents in the gasoline, but also can reduce octane number loss due to the modification process.

Description

technical field [0001] The invention relates to a method for hydrogenation and upgrading of low-quality gasoline, in particular to a method for hydrogenation and upgrading of 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 gasol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/14
Inventor 张学军兰玲许延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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