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A hydrogenation method for treating high-nitrogen and high-aromatic low-quality diesel feedstock

A low-quality diesel oil and high aromatics technology, applied in the field of hydrocarbon oil cracking, can solve the problem of low conversion rate

Active Publication Date: 2016-03-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, it is to solve the problem of low conversion rate when the existing technology processes high-nitrogen, high-aromatic low-quality diesel raw materials to produce gasoline

Method used

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  • A hydrogenation method for treating high-nitrogen and high-aromatic low-quality diesel feedstock
  • A hydrogenation method for treating high-nitrogen and high-aromatic low-quality diesel feedstock
  • A hydrogenation method for treating high-nitrogen and high-aromatic low-quality diesel feedstock

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0048] The preparation process and composition of the first hydrotreating catalyst B are as follows:

[0049] The n values ​​of all pseudo-boehmite in the examples of the present invention are determined by XRD method. The XRD test was carried out on a SIMENSD5005 X-ray diffractometer, with CuKα radiation, 44 kV, 40 mA, and a scanning speed of 2° / min. According to the Scherrer formula: D=Kλ / (Bcosθ) (D is the grain size, λ is the diffraction wavelength of the target material, B is the half-maximum width of the corrected diffraction peak, and 2θ is the position of the diffraction peak), respectively by 2θ Calculate the grain size of (120) as D(120) for the parameter of 23-33 ° peak, calculate the grain size of (031) as D (031) with the parameter of 34-43 ° peak with 2θ, and press The formula n=D(031) / D(120) calculates the value of n.

[0050] The preparation method of pseudo-boehmite P1 with 1.1≤n≤2.5 used in the examples of the present invention is as follows:

[0051] In a ...

Embodiment 1

[0059] The raw material oil E enters the first reaction zone together with hydrogen, contacts and reacts with the protective agent A and the first hydrotreating catalyst B, and the reaction effluent in the first reaction zone enters the hot high-pressure separator, cold high-pressure separator, and hot low-pressure separator , cold low-pressure separator, etc. after separation, the obtained gas phase stream removes H 2 S and NH 3 Finally, it is recycled as a hydrogen-rich gas, and the separated light hydrocarbons enter the fractionation tower, and the separated hydrogenated stream has a total aromatic content of 79 mass%, wherein the single-ring aromatic content is 55 mass%, and the organic nitrogen content is 100 μg / g.

[0060] The hydrogenated stream enters the second reaction zone, and successively contacts and reacts with the second hydrofinishing catalyst C and the hydrogenation upgrading catalyst D, and the reaction effluent in the second reaction zone is cooled, separat...

Embodiment 2

[0064] The raw material oil E enters the first reaction zone together with hydrogen, contacts and reacts with the protective agent A and the first hydrotreating catalyst B, and the reaction effluent in the first reaction zone enters the hot high-pressure separator, cold high-pressure separator, and hot low-pressure separator , cold low-pressure separator, etc. after separation, the obtained gas phase stream removes H 2 S and NH 3 Finally, it is recycled as a hydrogen-rich gas, and the separated light hydrocarbons enter the fractionation tower, and the separated hydrogenated stream has a total aromatic content of 82% by mass, of which the single-ring aromatic content is 59% by mass, and the organic nitrogen content is 130 μg / g.

[0065] The hydrogenation stream enters the second reaction zone, and successively contacts and reacts with the second hydrofinishing catalyst C and the hydrogenation upgrading catalyst D, and the reaction effluent in the second reaction zone is cooled,...

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Abstract

The invention discloses a hydrogenation method for treating high-nitrogen high-aromatic hydrocarbon inferior diesel oil raw materials. An integrated two-section process flow of a first reaction area, intermediate separation and a second reaction area is adopted. The method comprises the following steps: performing hydrodenitrogeneration and bicyclo- or multi-cyclo aromatic hydrocarbon hydrogenation saturation reactions on inferior diesel oil with high nitrogen and aromatic hydrocarbon content in the first reaction area, performing intermediate separation, obtaining a hydrogenated material flow in which the organic nitrogen content is less than 200 ug / g and the total aromatic hydrocarbon content is more than 60 weight percent, and providing the raw materials for the second reaction area; performing moderate refining and hydro-upgrading in the second reaction area, and performing fractionation to obtain gasoline components with high octane value. By adoption of the method provided in the invention, the inferior diesel oil fraction with high nitrogen and aromatic hydrocarbon content can be treated, and the gasoline components with high octane value and low sulfur content are obtained at high yield.

Description

technical field [0001] The present invention relates to a hydrocarbon oil cracking method for obtaining low-boiling fractions in the presence of hydrogen, more specifically, a hydrogenation method for processing high-nitrogen, high-aromatic inferior raw materials to produce high-octane gasoline components . Background technique [0002] With the aggravation of heavy and inferior crude oil, the quality of FCC diesel is deteriorating and the output is increasing year by year. This part of FCC diesel accounts for about one third of my country's commercial diesel. Moreover, in order to extract more light oil products from crude oil, refineries continue to increase the processing capacity and processing depth of catalytic cracking units, resulting in further deterioration of the quality of catalytic cracking diesel. At the same time, environmental protection legislation is becoming stricter, the market requires the production of clean fuels as much as possible, and due to the in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
Inventor 张毓莹蒋东红辛靖任亮胡志海聂红
Owner CHINA PETROLEUM & CHEM CORP
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