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Deep desulphurizing and dearomating process for diesel oil

A deep desulfurization and dearomatization technology, which is applied in refining to remove heteroatoms, etc., can solve the problems of increasing the catalyst packing density, increasing the catalyst packing volume, and affecting the removal of aromatics, so as to improve flexibility and stability and reduce packing The effect of increasing the amount and increasing the reactivity

Inactive Publication Date: 2004-12-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the process technology proposed in USP 5,183,556, the H in the first reaction zone 2 The concentration of S and others will be high, which will greatly affect the removal of aromatics in the raw oil. If the deep removal of aromatics is to be completed, the processing load of the second reaction zone will be greatly increased, either increasing the catalyst loading volume or increasing the catalyst capacity. Packing density, this operation mode is in turn unfavorable for gas-liquid countercurrent operation

Method used

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  • Deep desulphurizing and dearomating process for diesel oil
  • Deep desulphurizing and dearomating process for diesel oil
  • Deep desulphurizing and dearomating process for diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3 and comparative example 1～3

[0027] This test mainly investigates the hydrogenation effect of the hydrogenation process of the present invention and the existing countercurrent hydrogenation process. Take diesel desulfurization and dearomatization as an example. The physical and chemical properties of the catalyst used in this test are shown in Table 1, and the properties of the raw oil are shown in Table 2. In this test, the hydrogenation reaction was carried out on a continuous test device. Examples are shown in Table 3, and comparative examples are shown in Table 4.

[0028] Catalyst number

[0029] Density, g / cm 3

[0030] Example

[0031] comparative example

[0032] It can be seen from the experimental results that the hydrogenation effect of the present invention is greater than that of the existing countercurrent hydrogenation process.

Embodiment 4～6

[0033] Embodiment 4~6 and comparative example 4~6

[0034] This test mainly investigates the hydrogenation effect of the hydrogenation process of the present invention and the existing countercurrent hydrogenation process. Take diesel desulfurization and dearomatization as an example. The physical and chemical properties of the catalyst used in this test are shown in Table 1, and the properties of the raw oil are shown in Table 2. In this test, the hydrogenation reaction was carried out on a continuous test device. Examples are shown in Table ~ 5, and comparative examples are shown in Table ~ 6.

[0035] Example

[0036] comparative example

[0037] It can be seen from the experimental results that the hydrogenation effect of the present invention is greater than that of the existing countercurrent hydrogenation process.

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Abstract

The invention relates to deep desulfurization and dearomatization of diesel fuel. A conventional co-current hydrofining reactor is connected with deep hydrodesulfurization and dearomatization reactors. Raw oil gets through the conventional hydrofining reactor firstly, reacted liquid phase material is mixed with fresh hydrogen to feed into the tops of deep hydrodesulfurization and dearomatization reactors, taking gas-liquid co-current hydrogenation, and then, reacted material is separated in gas-liquid separating zone. Gas phase is discharged and fed into the conventional hydrofining reactor, and liquid phase flows down to contact with fresh hydrogen inlet from the bottom of the reactor, finally, refined product is discharged from the bottom of the reactor. The invention process eliminates hepatic gas etc. impurity influence to arena saturation reaction in deep hydrodesulfurization and dearomatization reacting system of process now available, utilizes fully fresh hydrogen resource in the system, improves system reacting activity, usability of different raw oil, controllability and stability of counter- current hydrogenation reaction, and has better flexibility.

Description

technical field [0001] The invention relates to a hydrocarbon hydrogenation treatment process, in particular to an improved hydrogenation process of gas, liquid and solid three-phase diesel fractions. Background technique [0002] With the continuous strengthening of people's awareness of environmental protection and the increasingly higher requirements for the fuel used by diesel engines, the production and use of clean fuels are showing a trend of accelerated development worldwide. The most critical and difficult part of diesel cleaning process is the deep removal of sulfur and aromatics. In order to meet the market demand, the world's major oil refining companies are actively developing and researching technology that can deeply remove diesel sulfur and aromatics. [0003] At present, the diesel hydrogenation process mostly adopts a fixed-bed hydrogenation process in which hydrogen and hydrocarbon raw materials flow side by side, contact with the catalyst bed and carry o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/02
Inventor 韩保平李士才方向晨曾榕辉
Owner CHINA PETROLEUM & CHEM CORP
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