Production method of clean diesel

A production method and diesel oil technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of catalyst service life impact, investment and operation cost increase, increase device operation cost, etc., to achieve long operation period, Low investment and operating costs, reducing investment and oil loss

Inactive Publication Date: 2010-06-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to produce ultra-low sulfur fuel, the first method can increase the operating severity of the hydrotreating unit, which will greatly increase the investment and operating costs of the device, and the service life of the catalyst will also be affected; the second method is to develop high activity catalyst, which may increase the price of the catalyst and also increase the operating cost of the unit

Method used

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  • Production method of clean diesel
  • Production method of clean diesel
  • Production method of clean diesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0042] The straight-run petroleum fraction A at 180-394°C is fractionated at a temperature of 212°C to obtain the light component AL (14% by mass) at 180-212°C and the heavy component AH (86% by mass) at 212-394°C , the properties of AH are listed in Table 2. It can be seen from Table 2 that the nitrogen content of AH is 235 μg.g -1 , accounting for 91% by weight of the nitrogen content of the whole fraction feedstock A.

[0043] Three kinds of diesel raw materials AH1, AH2 and AH3 with different nitrogen contents were prepared by adsorbing AH with silica gel (100-200 mesh) by column chromatography. Table 2 shows the properties of three different nitrogen content fractions. The column chromatography silica gel is commercially available fine-pore silica gel.

[0044] Mix AH1, AH2 and AH3 with AL respectively to obtain mixed raw materials B, C and D. Table 3 shows the properties of the four raw materials A, B, C and D. Among them, A is the non-fractionated, non-adsorbed deni...

Embodiment 4～6

[0056] Fractional distillation of the raw material E at a temperature of 219°C yields a light component EL (19% by mass) with a fraction range of 177-219°C and a heavy component EH (81% by mass) with a fraction range of 219-368°C. The properties of EH are listed in the table 5. It can be seen from Table 5 that the nitrogen content of AH is 241 μg.g -1 , accounting for 85% by weight of the nitrogen content of the whole fraction feedstock E.

[0057] Three kinds of diesel raw materials EH1, EH2 and EH3 with different nitrogen content were prepared by adsorbing EH with silica gel (100-200 mesh) by column chromatography. Table 5 shows the properties of three different nitrogen content fractions. The column chromatography silica gel is commercially available fine-pore silica gel.

[0058] Mix EH1, EH2 and EH3 with EL respectively to obtain mixed raw materials F, G and H. Table 6 shows the properties of the four raw materials E, F, G and H. Among them, E is the non-fractionated ...

Embodiment 7

[0069] The straight-run petroleum fraction A at 180-394°C is fractionated at a temperature of 212°C to obtain the light component AL (14% by mass) at 180-212°C and the heavy component AH (86% by mass) at 212-394°C , AH is adsorbed by column chromatography on silica gel (100-200mesh), and the nitrogen content is 113μg.g -1 The diesel raw material AH3. Mix AH3 with AL to obtain mixed raw material D, whose properties are listed in Table 8.

[0070] Using NiW / Al 2 o 3 Catalyst, D raw material at reaction temperature 350°C, hydrogen partial pressure 4.8MPa, volume space velocity 2.0h -1 , hydrogen oil volume ratio 300Nm 3 / m 3 Hydrodesulfurization experiments were carried out under the conditions. The results of the sulfur content of the product are shown in Table 9.

[0071] It can be seen from Table 9 that the sulfur content in the hydrogenated product obtained from raw material D is 38 μg.g -1 , in line with the sulfur content standard of Euro IV vehicle diesel (sulfur c...

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Abstract

The invention provides a production method of clean diesel. According to the characteristics that the content of nitrogen is different along with the distribution of the distillation range in the petroleum distillate, the diesel raw material is divided into a heavy component and a light component, wherein the content of nitrogen in the heavy component accounts for 5-20% of the weight of the total content of nitrogen in the diesel raw materials; the heavy component is mixed with the light component and then enters the hydrogenation unit after the adsorption unit removes the nitrogen-containing compound, and clean diesel is obtained after hydrogenation treatment. In the invention, only part of the distillate is adsorbed, thus reducing the investment of the adsorption unit and the loss of oils; in addition, the content of nitrogen in the hydrogenation raw material is reduced, thus reducing the competitive adsorption with sulfide, lowering operating severity of the hydrogenation unit and prolonging the service life of catalyst.

Description

technical field [0001] The present invention relates to a combination method of adsorbing and treating hydrocarbon oil without hydrogen and refining hydrocarbon oil in the presence of hydrogen, more specifically, the present invention is a production method of clean diesel oil. Background technique [0002] With the increasingly stringent environmental protection requirements worldwide, people's requirements for the quality of petroleum products are becoming more and more stringent, and the sulfur content indicators of vehicle diesel in my country are also becoming stricter. Beijing implemented the Euro III standard on July 1, 2005, namely The sulfur content of diesel for vehicles is less than 350μg.g -1 , In 2008, the Euro IV standard was implemented, that is, the sulfur content of diesel oil was less than 50μg.g -1 . The clean diesel mentioned in the present invention refers to the diesel products meeting Euro III standard and Euro IV standard. [0003] In order to reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/06
Inventor 邵志才聂红高晓冬刘学芬王哲
Owner CHINA PETROLEUM & CHEM CORP
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