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Two-stage hydrocracking method for low energy consumption production of high-quality jet fuels

A technology of hydrocracking and jet fuel, which is applied in hydrotreating process, hydrocarbon oil cracking, petroleum industry, etc. It can solve the problems of large circulation of kerosene distillate, increased equipment investment, and complicated operation, so as to reduce engineering investment and operation The effect of reducing energy consumption, project investment and operating energy consumption and improving product quality

Active Publication Date: 2015-10-28
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method needs to increase more equipment, and the circulation of kerosene fraction is relatively large, which increases the investment of the device, and the operation is more complicated

Method used

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  • Two-stage hydrocracking method for low energy consumption production of high-quality jet fuels
  • Two-stage hydrocracking method for low energy consumption production of high-quality jet fuels
  • Two-stage hydrocracking method for low energy consumption production of high-quality jet fuels

Examples

Experimental program
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Effect test

Embodiment 1-3

[0038] use figure 1 The process flow diagram shown. The hydrotreating reactor uses FF-46 hydrocracking pretreatment catalyst, and the hydrocracking reactor adopts a catalyst system of hydrocracking catalyst I / hydrocracking catalyst II graded in different volume ratios. Catalyst Ⅰ and catalyst Ⅱ are both supported by amorphous silica-alumina and modified Y molecular sieve. In Examples 1-3, in the hydrocracking reactor, the volume ratios of hydrocracking catalyst I / hydrocracking catalyst II were 3:2, 1:1 and 2:3 respectively, and the properties of the raw oil are shown in Table 1.

[0039] At a reaction pressure of 15.7MPa, the volume ratio of hydrogen to oil in the refining section and the cracking section is 900:1 and 1200:1 respectively, and the volume space velocity of the refining section and the cracking section are 1.0h -1 and 1.2h -1 Under the conditions of > 350 ° C, the process test with a conversion rate of about 70wt% was carried out, and the product quality of ea...

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Abstract

The invention discloses a two-stage hydrocracking method for low energy consumption production of high-quality jet fuels. The method comprises the following steps: mixing a raw material with hydrogen, carrying out two-time heat exchange, allowing the obtained material to go through a heating furnace, and carrying out a hydrofining reaction; carrying out gas-liquid separation and fractionation on a refining effluent; allowing obtained tail oil to enter a hydrocracking reaction zone, wherein the cracking reaction zone comprises at least two cracking catalysts, the upstream is a catalyst I, the downstream is a catalyst II, the catalyst I contains 15-50wt% of modified Y molecular sieve, the catalyst II contains 3-30wt% of the modified Y molecular sieve, and the content of the modified Y molecular sieve in the catalyst I is 10-25% higher than the content of the modified Y molecular sieve in the catalyst II; and separating and fractioning a hydrocracking effluent to obtain various products. The method organically combines a high temperature and high pressure countercurrent heat transfer technology with a hydrocracking catalyst grading technology, comprehensively utilizes hydrocracking reaction heat, maintains the catalyst selectivity, improves the quality of target products, and reduces the engineering investment and the operation energy consumption.

Description

technical field [0001] The invention relates to a hydrocracking method, in particular to a two-stage hydrocracking method for producing high-quality jet fuel with low energy consumption. Background technique [0002] As the market demand for middle distillates continues to increase, refineries are required to produce more middle distillates. The new fuel standard puts forward stricter requirements on the indicators of gasoline and diesel. Obviously, primary processing methods and FCC technology can no longer meet the market's requirements for clean fuels. The hydrocracking process is not only a secondary processing method to lighten heavy raw materials, but also an important means to obtain high-quality jet fuel and clean diesel from inferior raw materials. [0003] In recent years, with the worldwide shortage of crude oil resources and the increasingly inferior quality of crude oil, the properties of raw materials processed by hydrocracking units have also become increasin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02C10G47/16
Inventor 彭冲方向晨曾榕辉黄新露吴子明王仲义崔哲孙士可
Owner CHINA PETROLEUM & CHEM CORP
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