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Medium pressure hydrogenation method for maximumly producing high quality diesel fuel

A diesel and medium-pressure technology, which is applied in hydrotreating process, petroleum industry, and hydrocarbon oil treatment, etc. It can solve the problems of increasing hydrotreating reactors and catalysts, increasing circulating hydrogen flow, and increasing equipment investment.

Inactive Publication Date: 2004-11-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this process, the hydrocracking reactor effluent is completely mixed with the raw oil into the hydroprocessing reactor, which will lead to a substantial increase in hydroprocessing reactors and catalysts, an increase in system pressure drop, and a large increase in the circulating hydrogen flow rate. Both require a substantial increase in equipment investment

Method used

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  • Medium pressure hydrogenation method for maximumly producing high quality diesel fuel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The test raw material is a mixture of 46 wt% catalytic cracking diesel oil, 54 wt% atmospheric third-line distillate oil, and vacuum first-line distillate oil. According to the product plan of producing high-quality diesel fractions, the fractions above 370°C are recycled through the hot high-pressure separator. Hydrocracking reactor 6. The properties of raw oil, process conditions and product distribution are listed in Table 1, Table 2 and Table 3 respectively, and the yield of diesel fraction (150~370° C.) in Table 3 is 92.0% by weight. Table 4 lists the properties of naphtha fractions (65-150°C) and diesel fractions (150-370°C). It can be seen that naphtha has high aromatic potential, while diesel fractions meet the requirements of the World Fuel Oil Standard II, low sulfur and low Aromatic diesel requirements.

[0038] Raw oil properties

[0039] Hydrocracking operating conditions

[0040] * The amount of raw oil processed by the cracking react...

Embodiment 2

[0044] The test raw material is a mixture of 20% by weight of catalytic diesel and 80% by weight of vacuum gas oil. According to the product plan of producing more high-quality diesel fractions, the fractions above 370°C are recycled back to the hydrocracking reactor 6 through thermal high fractionation. The properties of raw oil, process conditions and product distribution are listed in Table 5, Table 6 and Table 7 respectively, and the yield of diesel fraction (150~370° C.) in Table 7 is 82.0% by weight. Table 8 lists the properties of naphtha fractions (65-150°C) and diesel fractions (150-370°C). It can be seen that naphtha has high aromatic potential, while diesel fractions meet the requirements of World Fuel Oil Standard II, low sulfur and low Aromatic diesel requirements.

[0045] Raw oil properties

[0046] Hydrocracking operating conditions

[0047] * The amount of raw oil processed by the cracking reactor includes the unconverted oil of the cracki...

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Abstract

In the medium-pressure hydrogenation process resulting in high yield and high quality of diesel oil, material and hydrogen are made to react inside hydrogenation reactor in the presence of hydrogenation catalyst, the produced hydrogenation reaction effluent and the reaction effluent from hydrocracking reactor are mixed, the mixture is separated in a heating high-pressure separator into a gaseous matter flow and a liquid phase matter flow, the liquid phase matter flow is made to enter cracking reactor after being mixed with circular hydrogen for reaction via contact with hydrocracking catalyst, the gaseous matter flow is separated into diesel oil fraction and other fraction via passing through cold high pressure separator, cold low pressure separator and fractioning tower successively, and the separated hydrogen-rich gaseous flow is mixed with new hydrogen with the mixture being fed to both hydrogenation reactor and the hydrocracking reactor separately.

Description

technical field [0001] The present invention relates to a method for refining and cracking hydrocarbon oils in order to obtain low boiling point fractions in the presence of hydrogen, more particularly, the present invention is a hydrogenation method at medium pressure to produce more high-quality diesel oil. Background technique [0002] With the increasing awareness of environmental protection around the world, many countries have established stricter standards for petroleum products, especially for motor fuels. Our country plans to implement new fuel oil specifications in some major cities in 2003, and will be fully implemented nationwide in 2006. The new diesel specifications require sulfur content≯300ppm, total aromatics content≯25% by weight, and cetane number≮ 50. Judging from the demand trend of oil products in my country, the supply of diesel oil has always been in short supply, and the requirements for the ratio of diesel to gasoline are ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/12
Inventor 熊震霖石玉林胡志海王子文
Owner CHINA PETROLEUM & CHEM CORP
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