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Grading method of catalyst of deep hydrodesulfurization of diesel oil

A deep hydrogenation and catalyst technology, which is applied in the fields of hydrogenation treatment process, petroleum industry, hydrocarbon oil treatment, etc., to achieve the effect of improving catalyst activity

Active Publication Date: 2012-12-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can produce a diesel fraction with a sulfur content meeting the Euro IV standard, but this is obtained under relatively harsh operating conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0014] Through the above in-depth analysis and understanding of the composition, distribution and hydrodesulfurization reaction of sulfides, the specific implementation mode of the present invention is:

[0015] The raw material oil is mixed with hydrogen and enters the hydrogenation reactor for hydrogenation reaction. The reaction effluent is cooled and separated to obtain hydrogen-rich gas and liquid products. There are four hydrogenation reaction zones in the hydrogenation reactor. The hydrogenation protection agent is filled in the reaction zone, the hydrofinishing catalyst I containing the active metal cobalt-molybdenum is filled in the second hydrogenation reaction zone, and the mixture of the hydrofinishing catalyst I and the hydrofinishing catalyst II is filled in the third reaction zone , filling the hydrorefining catalyst II containing active metal nickel-tungsten in the fourth reaction zone; based on the overall catalyst volume, the filling volume percentages of the ...

Embodiment 1

[0034] The raw material oil A is mixed with hydrogen and enters the hydrogenation reactor for hydrogenation reaction. The reaction effluent is cooled and separated to obtain hydrogen-rich gas and liquid products. Among the four hydrogenation reaction zones of the hydrogenation reactor: the first reaction zone Fill the protective agent RG-1, the filling volume is 10ml; the second reaction zone is filled with the hydrofinishing catalyst I, the filling volume is 10ml; the third reaction zone is filled with the mixture of the hydrofinishing catalyst I and the hydrofinishing catalyst II, and the filling The amount is 30ml; the fourth reaction zone is filled with hydrotreating catalyst II, and the filling amount is 50ml.

[0035] The properties of raw material oil A are listed in Table 1. It can be seen from Table 1 that the sulfur content of raw material oil A is as high as 13000 μg / g, which is a high-sulfur diesel oil. Process conditions and product properties are listed in Table ...

Embodiment 2

[0037] The raw material oil A is mixed with hydrogen and enters the hydrogenation reactor for hydrogenation reaction. The reaction effluent is cooled and separated to obtain hydrogen-rich gas and liquid products. Among the four hydrogenation reaction zones of the hydrogenation reactor: the first reaction zone Fill the protective agent RG-1, the filling volume is 10ml; the second reaction zone is filled with the hydrofinishing catalyst I, the filling volume is 20ml; the third reaction zone is filled with the mixture of the hydrofinishing catalyst I and the hydrofinishing catalyst II, and the filling The amount is 30ml; the fourth reaction zone is filled with hydrotreating catalyst II, and the loading amount is 40ml.

[0038] The properties of raw material oil A are listed in Table 1. It can be seen from Table 1 that the sulfur content of raw material oil A is as high as 13000 μg / g, which is a high-sulfur diesel oil. Process conditions and product properties are listed in Table ...

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Abstract

The invention discloses a grading method of catalyst of deep hydrodesulfurization of diesel oil, comprising the following steps: base oil and hydrogen are mixed, then the mixture is led into a hydrogenation reactor to carry out hydrogenation reaction; reaction effluent is cooled and separated to obtain hydrogen-rich gas and liquid product; the hydrogenation reactor sequentially comprises four hydrogenation reaction zones, wherein, the first hydrogenation reaction zone is filled with hydrogenation protective agent, the second hydrogenation reaction zone is filled with hyrorefining catalyst (1)containing active metal cobalt-molybdenum, the third hydrogenation reaction zone is filled with the mixture of the hyrorefining catalyst (1) and hyrorefining catalyst (2), and the fourth hydrogenation reaction zone is filled with the hyrorefining catalyst (2) containing active metal nickel-tungsten. The invention carries out reasonable grading on catalyst of different systems, gives full play to the advantages of each catalyst in different desulphurizing states, improves whole catalyst activity by synergy of each catalyst, and can obtain ultra low sulfur diesel oil, sulfur content of which satisfies Euro IV standard under moderate operation condition.

Description

technical field [0001] The invention belongs to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, a catalyst gradation method for deep hydrodesulfurization of diesel oil. Background technique [0002] The increasingly stringent environmental regulations around the world have stricter restrictions on the sulfur content in diesel. In Europe, the sulfur content was less than 500μg / g in 1996, and it was further reduced to less than 350μg / g in 2000. It was implemented in 2005. The Euro IV standard stipulates that the sulfur content in vehicle diesel should be less than 50 μg / g, while the Euro V emission standard requires less than 10 μg / g. The World Fuel Specification issued by the World Fuel Council also has stricter restrictions on the sulfur content of diesel products. The sulfur content of diesel products for Class II is not more than 300 μg / g, and the sulfur content of diesel for Class III and IV is not more than 30 μg / g and 10 μg. / g. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/04C10G45/08
Inventor 吴昊高晓冬王哲聂红龙湘云何宗付孟勇新
Owner CHINA PETROLEUM & CHEM CORP
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