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Diesel oil hydrotreating method

A hydrotreating and diesel technology, which is applied in the petroleum industry, refining hydrocarbon oil, etc., can solve the problems of easy liquid flooding, low operability, and low utilization rate of reactors, and achieve the effect of improving activity and optimizing operating flexibility

Inactive Publication Date: 2006-10-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this invention can reduce the liquid holding capacity of the reactor and appropriately increase the range of gas-liquid operation of the reactor, it is not related to the gas-liquid distribution of the entire reactor, and it is still prone to liquid flooding. In addition, the utilization rate of the reactor is also low. Not high, for large reactors such as hydrocarbon hydrotreating, the operability is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0017] Embodiment 1~6 and comparative example 1~4

[0018] 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 feedstock oil are shown in Table-2. In this test, the hydrogenation reaction was carried out on a continuous test device. Operating conditions are hydrogen to oil volume ratio: 300, reaction pressure: 6.0MPa, reaction temperature: 360°C, space velocity: 1.5h -1 . The catalyst in the embodiment is: non-noble metal catalyst (A): noble metal catalyst (B) (V: V) = V1: V2. Examples are shown in Table-3, and comparative examples are shown in Table-4.

[0019] project

[0020] Density, kg / m 3

[0021] Example

[0022] c...

Embodiment 7～12

[0024] Embodiment 7~12 and comparative example 4~8

[0025] 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 feedstock oil are shown in Table-2. In this test, the hydrogenation reaction was carried out on a continuous test device. Operating conditions are hydrogen to oil volume ratio: 300, reaction pressure: 6.0MPa, reaction temperature: 360°C, space velocity: 1.5h -1 . The catalysts in the examples are: non-noble metal catalyst (A): metal nitride catalyst (C) (V:V)=V1:V2. Examples are shown in Table-5, and comparative examples are shown in Table-6.

[0026] Example

[0027] comparative example

[0028] It can be seen from the experimental resu...

Embodiment 13～14

[0029] Examples 13-14 and Comparative Examples 9-11

[0030] This test mainly investigates the catalyst stability of the existing countercurrent hydrogenation process and the hydrogenation process of the present invention. The kind of catalyst is the same as that of Examples 1-12 and Comparative Examples 1-8, and the catalyst loading of the present invention is: A:B=6:4, A:C=6:4. The reaction temperature is 360°C and the space velocity is 1.5h -1 , the hydrogen pressure is 6.0MPa, and the hydrogen-oil ratio is 300. The device was operated for 500 hours. The test results are shown in Table-7.

[0031] Example 13

[0032] It can be seen from the results that the activity stability of the catalyst of the present invention is far greater than that of a single catalyst loading scheme.

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Abstract

The present invention relates to a gas-liquid counter-current diesel oil hydrogenation process. It adopts two or more than two catalyst bed layers whose catalyst activity can be progressively raised along liquid folloiwng direction and void volume of the catalyst bed layer is progressively increased, in which the high activity hydrogenation treatment catalyst is one or several kinds selected from reducing metal catalyst, noble metal catalyst, nitride or carbide catalyst of molybdenum, nickel and tungsten and non-noble metal sulfide catalyst in which the sulfur is not easy to be lost, and the void volume of the catalyst bed layer positioned in top of reactor is 0.25-0.55, and the void volume of the catalyst bed layer positioned in the bottom portion of the reactor is 0.35-0.90. Said invention can utilize diesel oil to produce clean fuel.

Description

1. Technical field [0001] The invention relates to a hydrocarbon hydrogenation treatment process, in particular to an improved gas, liquid and solid three-phase diesel hydrogenation process. 2. Background technology [0002] 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 out catalytic reaction, but the hydrogen sulfide, ammonia and hydrocarbons generated during the reaction process are small. Molecules will have a greater inhibitory effect on the further reactions of the process, such as desulfurization, denitrogenation, aromatics saturation and hydrocracking, which will reduce the reaction rate. Therefore, the staged hydrogenation and / or gas-liquid countercurrent hydrogenation process has increasingly become the focus of research in the field of petroleum refining. This process can increase the hydrogen partial pressure of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/00
Inventor 韩保平晋梅武平孙洪江宋若霞
Owner CHINA PETROLEUM & CHEM CORP