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Inferior diesel oil deep hydrodesulfurization method

A technology for deep hydrogenation and low-quality diesel oil, which is applied in the fields of hydrogenation treatment process, petroleum industry, and hydrocarbon oil treatment. It can solve the problems of stable operation of the catalyst in the lower part of the reactor and other problems, and achieve the effect of easing the reaction conditions.

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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  • Inferior diesel oil deep hydrodesulfurization method
  • Inferior diesel oil deep hydrodesulfurization method
  • Inferior diesel oil deep hydrodesulfurization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 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.

[0030] 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

[0032] 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.

[0033] It can be seen from Table 3 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 3

[0035] 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.

[0036] 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 an inferior diesel oil deep hydrodesulfurization method. The inferior diesel oil deep hydrodesulfurization method comprises the following steps that 1, raw oil and hydrogen pass through a heating furnace, enter into a first reactor, contact with a Mo-Ni hydrogenation catalyst under hydrofinishing conditions and undergo a conventional hydrofinishing reaction so that the most of nitrides and a part of sulfides are removed; and 2, produced oil enters into a gas stripping hydrogen mixer so that hydrogen sulfide and ammonia dissolved in the produced oil are removed and the hydrogen in the produced oil is in a dissolved saturation state; and the produced oil and supplementary hydrogen are mixed, enter into a second reactor, contact with a Mo-Co hydrofining catalyst, and undergo a deep desulphurization reaction. The inferior diesel oil deep hydrodesulfurization method is suitable for an inferior catalytic diesel oil fraction, a coked diesel oil fraction or a mixed diesel oil fraction produced by a petrochemical enterprise. Through the inferior diesel oil deep hydrodesulfurization method, ultralow-sulphur clean diesel oil having sulphur content below 50 micrograms per gram can be obtained.

Description

technical field [0001] The invention relates to a deep hydrogenation desulfurization method for low-quality diesel oil, in particular to a hydrogenation process that needs to produce 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 veh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/04
Inventor 徐大海刘继华李士才宋永一丁贺
Owner CHINA PETROLEUM & CHEM CORP
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