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Hydrogenation method for producing clean diesel oil

A diesel and clean technology, applied in the direction of refining to remove heteroatoms, etc., can solve the problems of high cost, low operating flexibility, and inability to greatly increase the cetane number, and achieve simple process, low operating pressure, equipment investment and operation The effect of low cost

Active Publication Date: 2008-02-06
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 low-sulfur, low-aromatic diesel oil, but the use of noble metal catalysts in this method increases the cost, increases the risk of operation, and reduces the flexibility of operation, and this method cannot greatly increase the cetane number of the product

Method used

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  • Hydrogenation method for producing clean diesel oil

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specific Embodiment approach

[0021] Through the above in-depth analysis and understanding of the composition and distribution of sulfides, aromatics, hydrodesulfurization and hydrodearomatization reactions, the specific embodiments of the present invention are:

[0022](1) After the raw material oil is mixed with circulating hydrogen, it enters the second hydrogenation reaction zone of the hydrogenation reactor, together with the product from the first hydrogenation reaction zone, under the action of the hydrofining catalyst, hydrodesulfurization, hydrogenation Hydrogen denitrogenation, olefin saturation and partial aromatic saturation reaction, the reaction conditions are: reaction temperature 250-450°C, preferably 260-420°C, hydrogen partial pressure 1.0-12.0MPa, preferably 2.0-10.0MPa, liquid hourly volume space velocity 0.3- 10.0h -1 , preferably 0.5~8.0h -1 , Hydrogen oil volume ratio 100~1500Nm 3 / m 3 , preferably 150-1000Nm 3 / m 3 .

[0023] (2) After the reaction effluent in the second hydro...

Embodiment 1

[0041]After the raw material oil A is mixed with the circulating hydrogen, it enters the second hydrogenation reaction zone together with the reaction product in the first reaction zone, and reacts under the action of the hydrofinishing catalyst. After the reaction product is cooled and separated, the obtained hydrogen-rich The gas is circulating hydrogen, and the obtained liquid phase fraction enters the fractionation system and is cut into naphtha fraction, light diesel fraction and heavy diesel fraction, among which the cut point of light diesel fraction and heavy diesel fraction is 320°C. 70% by weight of the heavy diesel oil fraction is mixed with new hydrogen and reacts with the hydrogenation upgrading catalyst in the first hydrogenation reaction zone, and the remaining heavy diesel oil fraction is mixed with the light diesel oil fraction to obtain a clean diesel product, wherein the hydrogenation upgrading The packing volume ratio of the mass and the hydrotreating cataly...

Embodiment 2

[0043] The raw material oil B is mixed with the circulating hydrogen and enters the second hydrogenation reaction zone together with the reaction product in the first reaction zone, and reacts under the action of the hydrofinishing catalyst, and the reaction product is cooled and separated, and the obtained hydrogen-rich The gas is circulating hydrogen, and the obtained liquid phase fraction enters the fractionation system and is cut into naphtha fraction, light diesel fraction and heavy diesel fraction, among which the cut point of light diesel fraction and heavy diesel fraction is 320°C. 80% by weight of the heavy diesel oil fraction is mixed with new hydrogen and reacts with the hydrogenation upgrading catalyst in the first hydrogenation reaction zone, and the remaining heavy diesel oil fraction is mixed with the light diesel oil fraction to obtain a clean diesel product. The packing volume ratio of the mass and the hydrotreating catalyst is 4:6. The reaction conditions of ...

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Abstract

The present invention relates to a hydrogenation method for producing clean diesel oil, after the raw material oil is mixed with circulating hydrogen, the mixture enters into a second hydrogenating reactor area, under the action of hydrogenation refining catalyst, the reaction is performed, after the reaction effusion is cooled, separated and fractionated, naphtha distillate, light diesel oil distillate and heavy diesel oil distillate are got, after a part or whole heavy diesel oil distillate is mixed with new hydrogen, the mixture enters into a first hydrogenating reactor area, and contacts with the hydrogenating reforming catalyst to perform reaction, the reactant enters into the second hydrogenating reactor area directly without separation, the left heavy diesel oil distillate and the light diesel oil distillate are mixed to get the diesel oil product. The adoption method of the present invention can treat high sulpher, high nitrogen and high drying point diesel oil distillate, under the relaxer operation condition, 2 type and 3 type of standard clean diesel oil which meet the requirement of the World Fuel Oil Code can be got. The present invention has simple flow and low operation pressure, the investment for equipments and the operation cost are all comparatively lower.

Description

technical field [0001] The invention belongs to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, a hydrogenation method for producing clean diesel oil. Background technique [0002] With the continuous strengthening of environmental protection requirements, people's requirements for vehicle exhaust emissions are becoming increasingly stringent, and corresponding vehicle fuel specifications have been put forward. In the latest worldwide fuel specifications, strict control is made on diesel oil indicators, among which there are not only stricter requirements on diesel sulfur content than before, but also stricter requirements on density, aromatics content and cetane number, etc. There are strict rules. For example, the Euro III emission standards implemented in Europe since 2000 stipulate that the sulfur content of diesel for vehicles shall be less than 350 μg / g, the polycyclic aromatic hydrocarbons shall not be higher than 11% by weight, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/02
Inventor 王哲高晓冬何宗付陈若雷卫剑刘学芬
Owner CHINA PETROLEUM & CHEM CORP
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