Hydrogenation method for producing high-quality low-sulfur diesel fraction

A low-sulfur diesel oil and fraction technology, which is applied in the field of hydrogenation for producing high-quality low-sulfur diesel fractions, can solve problems such as the lack of diesel raw materials, and achieve the effects of low investment and operating costs, reduced loading, and simple device process.

Active Publication Date: 2010-06-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the shortage of diesel raw materials in the prior art, and the repeated construction of auxiliary systems in multiple hydrogenation units, such as hydrogen circulation systems and fractionation systems, to provide a high-quality, low-sulfur fuel with strong integration and flexible production schemes. Hydrogenation method of diesel fraction

Method used

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  • Hydrogenation method for producing high-quality low-sulfur diesel fraction
  • Hydrogenation method for producing high-quality low-sulfur diesel fraction
  • Hydrogenation method for producing high-quality low-sulfur diesel fraction

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Experimental program
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Effect test

Embodiment 1

[0047] The raw material I of this embodiment is a mixed raw material oil H of low-quality straight-run diesel oil with a high content of aromatics and naphthenes and MIP diesel fuel, and the raw material II is a straight-run diesel oil with low sulfur and nitrogen content and good properties P, the properties of the two feedstock oils are shown in Table 1.

[0048] Raw oil H accounting for 68.2% by weight of the total feed is mixed with hydrogen or hydrogen-rich gas, and enters the first reaction zone after being preheated by the heating furnace, and contacts and reacts with the protective agent E and the hydrotreating catalyst A in sequence. The first reaction The zone effluent directly enters the second reaction zone without any intermediate separation, and continues to contact and react with the hydrocracking catalyst C. The raw material oil P, which accounts for 31.8% by weight of the total feed, is mixed with a part of the hydrogen-rich gas, and after being preheated by t...

Embodiment 2

[0051] The raw material I of this embodiment is a raw material oil J mixed with a coker diesel oil from naphthenic crude oil, catalytic diesel oil and a light wax oil, and the raw material II is a low nitrogen content and a lighter distillation range from The straight-run diesel oil K of naphthenic crude oil, the properties of the two feedstock oils are shown in Table 1.

[0052] Raw material oil J, which accounts for 70% by weight of the total feed, is mixed with hydrogen or hydrogen-rich gas, and enters the first reaction zone after being preheated by the heating furnace, and successively contacts and reacts with protective agent E and hydrotreating catalyst A. The zone effluent directly enters the second reaction zone without any intermediate separation, and continues to contact and react with the hydrocracking catalyst C. After the raw material oil K which accounts for 30% by weight of the total feed amount is mixed with part of the hydrogen-rich gas, after being preheated...

Embodiment 3

[0055] The raw material I of this embodiment is a raw material oil L mixed with two kinds of inferior catalytic cracking diesel oil and a kind of normal three minus one light wax oil, wherein the light wax oil accounts for 49% by weight of the mixed raw material L, and the raw material II is a nitrogen-containing See Table 1 for the properties of the straight-run diesel oil M with a lower amount.

[0056] The raw material oil L, which accounts for 80% by weight of the total feed amount, is mixed with hydrogen or hydrogen-rich gas, and enters the first reaction zone after being preheated by the heating furnace, and successively contacts and reacts with the protective agent E and the hydrotreating catalyst B, and the first reaction The zone effluent directly enters the second reaction zone without any intermediate separation, and continues to contact with the hydrocracking catalyst D for reaction. The raw material oil M which accounts for 20% by weight of the total feed is mixed...

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Abstract

The invention relates to a hydrogenation method for producing high-quality low-sulfur diesel fraction. The method sets hydrofining, hydrocracking and hydrofining reaction areas, wherein hydrocarbon material I with an end point less than 540 DEG C sequentially enters and reacts in the first hydrogenation reaction area and the second hydrogenation reaction area, hydrocarbon material II with an end point less than 400 DEG C enters and reacts in the third hydrogenation reaction area, and the reaction effluent of the reaction area is separated and fractioned, so that the diesel fraction is obtained. In order to solve the problems of the prior art, including diesel material shortage and the repeated construction of hydrogen circulation systems, fractioning systems and other auxiliary systems ina plurality of hydrogenation units, the invention provides the hydrogenation method for producing high-quality low-sulfur diesel fraction, which has the advantages of high integration and flexible production scheme.

Description

technical field [0001] The present invention relates to a combination method of refining hydrocarbon oil in the presence of hydrogen and cracking hydrocarbon oil in the presence of hydrogen, more specifically, the present invention is a hydrofinishing-hydrocracking-hydrofining process Combined approach to produce premium low sulfur diesel fractions. Background technique [0002] As the requirements for environmental protection are getting higher and higher, the requirements for the quality of diesel products in various countries are becoming more and more stringent. For automotive diesel, the indicators that have changed a lot in the new specifications are sulfur content and cetane number. In the emission standard equivalent to Euro IV to be implemented in China, the cetane number of diesel oil is required to be not less than 51, and the sulfur content is not greater than 50 μg / g. [0003] On the other hand, as the international crude oil price continues to rise, domestic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/02
Inventor 张毓莹胡志海蒋东红卫剑辛靖聂红
Owner CHINA PETROLEUM & CHEM CORP
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