Diesel oil hydrodesulphurization method

A technology for hydrodesulfurization and diesel oil, which is used in hydrotreating process, petroleum industry, processing of hydrocarbon oil, etc., can solve the problems of stable performance of the catalyst in the lower part of the reactor in the stable operation of the device, etc., so as to alleviate the reaction conditions and reduce the operation cost. , the effect of simple process

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can obtain better hydrodesulfurization and dearomatization effects, there are problems in the smooth operation of the device and the stable performance of the catalyst activity in the lower part of the reactor.

Method used

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  • Diesel oil hydrodesulphurization method
  • Diesel oil hydrodesulphurization method
  • Diesel oil hydrodesulphurization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Diesel feedstock 1 enters the first hydrogenation reactor, and the reaction conditions are: hydrogen partial pressure 5.8MPa, reaction temperature 352°C, hydrogen-oil volume ratio 300:1; the effluent enters the second hydrogenation reaction after passing through the gas stripping hydrogen dissolver device, the reaction conditions are: hydrogen partial pressure 5.5MPa, reaction temperature 348°C, hydrogen-oil volume ratio 200:1, total volume space velocity 1.9h -1 . The raw material oil properties and product properties are listed in Table 2.

[0036] It can be seen from Table 2 that the sulfur content of diesel products can be reduced to less than 50 μg / g by using this process technology, which meets the national standard IV clean diesel standard.

Embodiment 2

[0038] Diesel feedstock 2 enters the first hydrogenation reactor, and the reaction conditions are: hydrogen partial pressure 6.0MPa, reaction temperature 361°C, hydrogen-oil volume ratio 350:1; the effluent enters the second hydrogenation reaction after passing through the gas stripping hydrogen dissolver device, the reaction conditions are: hydrogen partial pressure 5.8MPa, reaction temperature 349°C, hydrogen-oil volume ratio 150:1, total volume space velocity 2.0h -1 . The raw material oil properties and product properties are listed in Table 3.

[0039] It can be seen from Table 3 that the sulfur content of diesel products can be reduced to 10 μg / g by using this technology, which meets the national standard V clean diesel standard.

Embodiment 3

[0041] Diesel raw material 3 enters the first hydrogenation reactor, and the reaction conditions are: hydrogen partial pressure 7.0MPa, reaction temperature 370°C, hydrogen-oil volume ratio 300:1; the effluent enters the second hydrogenation reaction after passing through the gas stripping hydrogen dissolver device, the reaction conditions are: hydrogen partial pressure 6.7MPa, reaction temperature 358°C, hydrogen-oil volume ratio 300:1, total volume space velocity 1.9h -1 . The raw material oil properties and product properties are listed in Table 4.

[0042] It can be seen from Table 4 that the sulfur content of diesel products can be reduced to less than 10 μg / g by using this process technology, which meets the national standard V clean diesel standard.

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Abstract

The invention relates to a diesel oil hydrodesulphurization method. According to the invention, raw oil and hydrogen are first delivered into a gas-liquid mixer through a heating furnace, such that hydrogen and raw oil are fully mixed; the mixture is delivered into a first reactor, and contacts a W-Mo-Ni hydrogenation catalyst under a hydrorefining condition; a common hydrorefining reaction is carried out, such that most of nitrides and part of sulfides are removed, and polycyclic aromatic hydrocarbons are subject to a hydrogenation saturation reaction; generated oil is delivered into stripping and hydrogen mixing equipment, such that hydrogen sulfide and ammonia dissolved in the oil are removed, and hydrogen reaches a dissolved and saturated state in the oil; the oil is mixed with supplemental hydrogen, and the mixture is delivered into a second reactor; the mixture contacts a Mo-Co series hydrorefining catalyst, and a deep desulphurization reaction is carried out, such that a good effect can be achieved. The method is provided aiming at inferior catalytic diesel oil fractions, coked diesel oil fractions or mixed diesel oil fractions of petrochemical enterprises. With the method, ultra-low-sulfur clean diesel oil with a sulfur content lower than 50mug/g or even lower can be produced.

Description

technical field [0001] The invention relates to a method for hydrogenation desulfurization of diesel oil, in particular to a hydrogenation process for producing ultra-low sulfur diesel oil. Background technique [0002] As countries around the world have increasingly stringent requirements for environmental protection regulations, the indicators of vehicle diesel are becoming more and more stringent, and the production of ultra-low sulfur diesel has become a topic of common concern worldwide. Ultra-low sulfur diesel (ULSD) refers to automotive diesel fuel with a sulfur content of less than 50 μg / g or even lower. Developed countries such as Europe and the United States have taken the lead in requiring their own countries to implement the quality standards for ultra-low sulfur diesel. In recent years, with the continuous attention of the Chinese government to environmental protection, in some big cities, such as Beijing, Shanghai, Guangzhou, etc., the vehicle diesel standard w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
Inventor 徐大海刘继华宋永一丁贺李士才
Owner CHINA PETROLEUM & CHEM CORP
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