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

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

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

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

[0048] The feedstock oil H, which accounts for 68.2% by weight of the total feed, is mixed with hydrogen or hydrogen-rich gas, enters the first reaction zone after being preheated by the heating furnace, and sequentially contacts and reacts with the protective agent E and the hydrorefining catalyst A. 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. After the raw material oil P, which accounts for 31.8% by weight of the total feed, is mixed with part of the hydrogen-rich gas, it is preheated by the heating fur...

Embodiment 2

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

[0052] The feedstock oil J, which accounts for 70% by weight of the total feed, is mixed with hydrogen or hydrogen-rich gas, enters the first reaction zone after being preheated by the heating furnace, and sequentially contacts and reacts with the protective agent E and the hydrorefining catalyst A. 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. After mixing the feedstock oil K, which accounts for 30% by weight of the total feed, and part of the hydrogen-rich gas, after being preheated b...

Embodiment 3

[0055] The feedstock I of this embodiment is made by mixing two inferior catalytic cracked diesel oils and a normal three minus one light wax oil to form feedstock oil L, where light wax oil accounts for 49% by weight of the mixed feedstock L, and feedstock II is a nitrogen-containing For low-volume straight-run diesel M, the properties of the two feedstock oils are shown in Table 1.

[0056] The feedstock oil L, which accounts for 80% by weight of the total feed, is mixed with hydrogen or hydrogen-rich gas, enters the first reaction zone after being preheated by the heating furnace, and sequentially contacts and reacts with the protective agent E and the hydrorefining catalyst B. 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 D. After mixing the feedstock oil M, which accounts for 20% by weight of the total feed, and part of the hydrogen-rich gas...

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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 combined 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 method of hydrorefining-hydrocracking-hydrorefining Combined methods to produce high-quality 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 most changed indicators in the new specifications are sulfur content and cetane number. In the emission standard equivalent to Euro IV to be implemented in China, the diesel cetane number is required to be no less than 51 and the sulfur content is no more than 50μg / g. [0003] On the other hand, as the price of international crude oil continues to rise, domestic refineries have made impo...

Claims

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Application Information

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Patent Type & Authority Patents(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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