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Hydro-processing method for producing ultra-low sulfur diesel

A kind of ultra-low sulfur diesel oil, hydrotreating technology

Active Publication Date: 2012-05-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a hydrotreating method for producing ultra-low-sulfur diesel oil. The technical problem to be solved is that when producing ultra-low-sulfur diesel oil, the temperature rise of the catalyst bed cannot be effectively controlled by operating at high temperature, and the local temperature of the bed layer is too high. high

Method used

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  • Hydro-processing method for producing ultra-low sulfur diesel
  • Hydro-processing method for producing ultra-low sulfur diesel
  • Hydro-processing method for producing ultra-low sulfur diesel

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Embodiment 1

[0035] The raw material oil A is fully mixed with new hydrogen, enters the static mixer, and then the liquid phase enters the first hydrotreatment reaction zone, and undergoes deep hydrodesulfurization reaction at high temperature and high space velocity; the reaction product is divided into two parts, and one part is recycled to At the inlet of the static mixer, the other part is mixed with circulating hydrogen and then enters the second hydrotreating reaction zone, where ultra-deep desulfurization, decolorization and aromatic hydrocarbon saturation reactions are carried out at low temperature and high space velocity, and the reaction products are cooled and separated. The hydrogen gas is circulating hydrogen, and the obtained liquid phase fraction enters the fractionation system to separate refined naphtha fraction and high-quality diesel fraction. Wherein the catalysts in the first reaction zone and the second reaction zone are catalyst A, the reaction conditions of this emb...

Embodiment 2

[0038] After the raw material oil B is fully mixed with the new hydrogen, it enters the static mixer, and then the pure liquid phase enters the first hydrotreatment reaction zone, and the deep hydrodesulfurization reaction is carried out at high temperature and high space velocity; the reaction product is fully mixed with the new hydrogen , into the static mixer, and then the pure liquid phase enters the second hydrotreating reaction zone, where ultra-deep desulfurization, decolorization and aromatics saturation reactions are carried out at low temperature and high space velocity, and the reaction products are cooled and separated. Enter the fractionation system to separate the refined naphtha fraction and high-quality diesel fraction; the remaining part is recycled to the inlet of the first hydrogenation reaction zone and the second hydrotreatment reaction zone. The first reaction zone is sequentially filled with catalyst A and catalyst B according to the flow direction of the...

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Abstract

A hydro-processing method for producing ultra-low sulfur diesel comprises the following steps: completely dissolving the hydrogen I in diesel fraction raw oil to enter into a first hydro-processing reaction zone to be contacted with hydro-processing catalyst under pure liquid phase; reacting under the temperature of 340 to 400 DEG C; mixing the effluent of the first hydro-processing reactor with the hydrogen II to enter into a second hydro-processing reaction zone to be contacted with the hydro-processing catalyst under the state of pure liquid phase or low hydrogen-oil ratio; reacting under the reaction temperature of 240-320 DEG C, and cooling and separating the effluent of the second hydro-processing reaction zone to obtain diesel product. The method of the invention can be used for translating the diesel fraction with high sulfur content into ultra-low sulfur diesel product with good color, wherein the sulfur content can meet the Euro IV and Euro V discharge standard requirement and simultaneously, the chromaticity is less than 0.5.

Description

technical field [0001] The invention belongs to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, a hydrogenation method for producing ultra-low sulfur clean diesel oil. Background technique [0002] With the continuous improvement of environmental protection requirements, people's requirements for vehicle fuel specifications are also getting higher and higher. In the latest fuel specifications worldwide, strict controls are made on diesel indicators. Among them, there are more stringent requirements on the sulfur content of diesel than before. For example, the Euro III emission standard implemented in Europe since 2000 stipulates that the sulfur content of vehicle diesel should be less than 350 μg / g, while the Euro IV emission standard implemented in 2005 requires the sulfur content to be lowered to less than 50 μg / g, which will be implemented in 2009 In the Euro V standard, the sulfur content is further reduced to below 10μg / g. my cou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/04
Inventor 高晓冬聂红王哲陈若雷刘学芬龙湘云王子文
Owner CHINA PETROLEUM & CHEM CORP
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