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Method for gasoline modification

A gasoline and upgrading technology, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problem of large octane number loss, achieve small octane number loss, reduce mercaptan content, and reduce octane The effect of value loss

Inactive Publication Date: 2012-08-15
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 modification
  • Method for gasoline modification

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Embodiment 1

[0030] 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 cut into two components of light and heavy gasoline, and the heavy gasoline fraction accounts for 65% of the raw material. 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. After desulfurization, the product enters the fine desulfurization 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-oil volume ratio of 50, the sulf...

Embodiment 2

[0032] 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 cut into two components of light and heavy gasoline, and the heavy gasoline fraction accounts for 65% of the 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 fine desulfurization 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-oil volume ratio of 50, the sulfur content of gasoline is further reduced with the fractionation tower Light gasoline from the top of the tower is mixed to obtain a modified gasoline product. See Table 2 for...

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Abstract

The invention relates to a method for gasoline modification; gasoline raw materials and hydrogen are mixed, and the mixture is allowed to enter a prehydrogenation reactor for dialkene removal, and to enter a fractionating tower so as to cut the gasoline into light and heavy components; light gasoline from the fractionating tower top is directly used as a clean gasoline blending component; heavy gasoline from the bottom of the fractionating tower is allowed to enter a hydrogenation modification reactor for reaction, 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 fine desulfurization tower for further reducing the sulfur 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 desulphurization process.

Description

technical field [0001] The invention relates to a gasoline upgrading method, in particular to a hydrogenation upgrading method for 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 than 80%, which is the...

Claims

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Application Information

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IPC IPC(8): C10G67/14
Inventor 张学军兰玲李文乐鞠雅娜袁晓亮孙洪磊侯远东钟海军陈烈杭吴平易赵秦峰马健波
Owner PETROCHINA CO LTD
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