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Ultra low sulfur gasoline combination production method

A production method and ultra-low sulfur technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve problems such as large loss of octane number, and achieve small loss of octane number, long operating period, high liquid the effect of

Inactive Publication Date: 2016-07-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This process can realize the production of ultra-low sulfur gasoline, and the fixed bed adsorption desulfurization technology adopted has a low octane number loss (0.7-0.8 units) in the ultra-deep desulfurization process, but because this process directly enters the full fraction FCC gasoline into the selection The hydrodesulfurization reactor was used for hydrotreating, reducing the sulfur content of FCC gasoline from 165.6μg / g to 76μg / g, and the octane number (RON) loss reached 0.6 units when the desulfurization rate was 54%, achieving ultra-deep Desulfurization RON loss 1.3-1.4 units, octane number loss is larger

Method used

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Embodiment a

[0087] This embodiment provides a combined production method of ultra-low sulfur gasoline, including the following steps:

[0088] 1) Mix the full-cut FCC gasoline with hydrogen, enter the pre-hydrogenation reactor after preheating for pre-hydrogenation, remove part of the diolefins in the FCC gasoline feedstock, and reconstitute part of the light sulfide; The pre-hydrogenation reaction conditions are: hydrogen partial pressure 1.0MPa, volumetric space velocity 1.0h -1 , The reaction temperature is 80°C, the hydrogen-to-oil volume ratio is 1v / v, the catalyst is a pre-hydrogenation catalyst; the pre-hydrogenation catalyst is: Al 2 O 3 The monomer is the carrier, and based on 100% of the carrier weight, 4% of the VIB group element and 6% of the VIII group element are used as active components;

[0089] 2) Introduce the reaction effluent from step 1) into the fractionation tower, the top pressure of the fractionation tower is 0.7MPa, the bottom temperature is 190°C, and the top tempera...

Embodiment b

[0096] This embodiment provides a combined production method of ultra-low sulfur gasoline, including the following steps:

[0097] 1) Mix the full-cut FCC gasoline with hydrogen, enter the pre-hydrogenation reactor after preheating for pre-hydrogenation, remove part of the diolefins in the FCC gasoline feedstock, and reconstitute part of the light sulfide; The pre-hydrogenation reaction conditions are: hydrogen partial pressure 6.0MPa, volumetric space velocity 10.0h -1 , The reaction temperature is 250°C, the hydrogen-to-oil volume ratio is 100v / v, the catalyst is a pre-hydrogenation catalyst; the pre-hydrogenation catalyst is: Al 2 O 3 The monomer is the carrier, and based on 100% of the carrier weight, 10% of the VIB group element and 15% of the VIII group element are used as the active component;

[0098] 2) Introduce the reaction effluent from step 1) into the fractionation tower, the top pressure of the fractionation tower is 0.75MPa, the bottom temperature is 230°C, and the t...

Embodiment c

[0105] This embodiment provides a combined production method of ultra-low sulfur gasoline, including the following steps:

[0106] 1) Mix the full-cut FCC gasoline with hydrogen, enter the pre-hydrogenation reactor after preheating for pre-hydrogenation, remove part of the diolefins in the FCC gasoline feedstock, and reconstitute part of the light sulfide; The pre-hydrogenation reaction conditions are: hydrogen partial pressure 2.0MPa, volumetric space velocity 2.0h -1 , The reaction temperature is 80°C, the hydrogen-to-oil volume ratio is 4v / v, the catalyst is a pre-hydrogenation catalyst; the pre-hydrogenation catalyst is: Al 2 O 3 The monomer is the carrier, and based on 100% of the carrier weight, 4% of the VIB group element and 6% of the VIII group element are used as active components;

[0107] 2) Introduce the reaction effluent from step 1) into the fractionation tower, the top pressure of the fractionation tower is 0.7MPa, the bottom temperature is 190°C, and the top tempera...

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Abstract

The invention discloses a combined production method of ultra-low-sulfur gasoline, which comprises the following steps: pre-hydrogenating full-distillate catalytically cracked gasoline and hydrogen after preheating, removing part of dienes in FCC gasoline raw materials, and part of light sulfurized gasoline. The reaction effluent is introduced into the fractionation tower, and it is fractionated into light gasoline and heavy gasoline at 65-100 ℃, and the sulfur content of the light gasoline is controlled at 20-50 μg / g; the heavy gasoline and hydrogen flowing out from the bottom of the fractionation tower are mixed into Aromatization / isomerization is carried out in the hydro-upgrading reactor to increase the octane number, and the reaction effluent enters the hydro-desulfurization reactor for selective hydro-desulfurization, and the sulfur content of heavy gasoline is controlled at 40-70 μg / g; The heavy gasoline after hydrogen desulfurization is subjected to gas-liquid separation, and the hydrogen sulfide is removed by stripping, and then mixed with light gasoline into the fixed bed hydrogen adsorption desulfurization reactor, and mixed with hydrogen for fixed bed hydrogen adsorption desulfurization reaction, so as to ensure the mixed gasoline The sulfur content is controlled within 10μg / g to achieve ultra-deep desulfurization without loss of octane number.

Description

Technical field [0001] The invention relates to a method for processing catalytically cracked gasoline, in particular to a combined process method for producing ultra-low sulfur clean gasoline from catalytically cracked gasoline. Background technique [0002] The National V gasoline standard (sulfur content not higher than 10μg / g) will be implemented nationwide from January 1, 2018. The desulfurization of catalytic cracking (FCC) gasoline is the key to clean gasoline in my country. The development of advanced FCC gasoline Ultra-deep desulfurization (sulfur content not higher than 10μg / g) technology has become a problem facing my country's oil refining industry. [0003] At present, the global FCC gasoline desulfurization mainly takes the technical route of hydrodesulfurization. my country’s FCC gasoline has the characteristics of high sulfur content and high olefin content. Most refineries have achieved the national IV gasoline quality upgrade through the hydrodesulfurization techn...

Claims

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Application Information

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IPC IPC(8): C10G67/00
Inventor 赵秦峰兰玲朴佳锐金辰李阳康宏敏马健波吕忠武
Owner PETROCHINA CO LTD
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