Hydrocracking method of productive high-quality jet fuel

A technology of hydrocracking and jet fuel, which is applied in hydroprocessing process, petroleum industry, and hydrocarbon oil treatment, etc. It can solve the problems of large circulation volume of kerosene fraction, increase equipment investment, complicated operation, etc., and achieve reduction of dry gas production rate , improve quality, reduce the effect of BMCI value

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to increase more equipment, and the circulation of kerosene fraction is r

Method used

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  • Hydrocracking method of productive high-quality jet fuel

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Embodiment 1～3

[0038] Embodiment 1~3 adopts figure 1 In the schematic process shown, the tail oil is all recycled to the second hydrocracking reaction zone. The properties of the raw oil used are shown in Table 1. The hydrocracking catalyst I / hydrogenation of FF-46 hydrogenation pretreatment catalyst and different volume ratios are selected. The cracking catalyst II catalyst system, the composition and properties of the catalyst are shown in Table 2. The process conditions and product properties of Examples 1 to 3 are listed in Tables 3 and 4. The distillation ranges of each fraction in the examples are: heavy naphtha 65-160°C, middle distillates 160-300°C, tail oil>300°C ℃.

[0039] The first stage mentioned in the embodiment refers to the single-stage series reaction zone formed by the hydroprocessing reaction zone and the first hydrocracking reaction zone; the second stage refers to the second hydrocracking reaction zone.

[0040] The results of Examples 1-3 show that, by adopting the h...

Embodiment 4～5

[0055] Embodiment 4~5 adopts figure 1 In the schematic process shown, the tail oil is partially recycled, and the circulation amount is 50% of the generated tail oil. The feedstock oil and catalyst system are the same as those in Examples 1-3. The process conditions and product properties are listed in Table 6. The distillation ranges of each fraction in the examples are: heavy naphtha 65-160°C, middle distillate 160-330°C, and tail oil >330°C.

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Abstract

The invention discloses a hydrocracking method of a productive high-quality jet fuel. Raw material oil and hydrogen successively pass through a hydrofining zone and a first cracking reaction zone to obtain tail oil to get into a second cracking reaction zone for cracking; two cracking catalysts exist in the first cracking reaction zone, the upstream of the first cracking reaction zone is loaded with a catalyst I, and the downstream of the first cracking reaction zone is loaded with a catalyst II; the catalyst I contains 15%-50% of a modified Y molecular sieve, the catalyst II contains 3%-30% of the modified Y molecular sieve, and the content of the Y molecular sieve in the catalyst I is 10%-25% higher than the content of the Y molecular sieve in the catalyst II. The catalyst I has strong aromatic conversion ability, can convert aromatic hydrocarbons in heavy components into smaller molecules to distribute into the heavy naphtha fractions and aviation kerosene fractions, the catalyst II has strong alkane cracking ability, by synergy of the catalyst II and the catalyst I, the quality of the jet fuel is obviously improved. The hydrocracking method can maximumly produce the high quality jet fuel.

Description

technical field [0001] The invention relates to a hydrocracking method, in particular to a hydrocracking method which simultaneously uses different types of hydrocracking catalysts to produce high-quality jet fuel in a maximum amount. 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] The one-time investment of the hydrocracking unit is relatively large, and the operating cost is also relatively high. Therefore, major research companies around ...

Claims

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Application Information

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IPC IPC(8): C10G65/12
Inventor 彭冲王仲义黄新露石友良曾榕辉孙士可
Owner CHINA PETROLEUM & CHEM CORP
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