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Hydrocracking method for selective increasing of aviation kerosene yield

A hydrocracking and selective technology, which is applied in hydroprocessing process, petroleum industry, hydrocarbon oil treatment, etc., can solve the problems of unqualified, etc., and achieve the effect of excellent jet fuel quality, maintaining selectivity and reducing hydrogen consumption

Active Publication Date: 2013-04-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention can produce jet fuel with qualified indicators such as smoke point and aromatics content under relatively low reaction pressure, but this process method cannot directly obtain qualified jet fuel in the hydrocracking unit, and still needs to be mixed with straight-run kerosene Hydrofining

Method used

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  • Hydrocracking method for selective increasing of aviation kerosene yield
  • Hydrocracking method for selective increasing of aviation kerosene yield
  • Hydrocracking method for selective increasing of aviation kerosene yield

Examples

Experimental program
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Effect test

Embodiment 1

[0038] At a reaction pressure of 13.0MPa, a hydrofining reactor reaction temperature of 374°C, and a volume space velocity of 1.2h -1 , Hydrocracking reactor reaction temperature 368°C, volume space velocity 2.0h -1 1. Under the reaction conditions of hydrogen-oil volume ratio 1200, with the method provided by the invention, adopt raw material B to carry out experiment, wherein will account for 320~370 ℃ of heavy diesel oil cuts of 50% of all heavy diesel oil mass percentages to circulate to feed tank inlet, test The results are shown in Table 2.

[0039] It can be seen from Table 2 that under the condition of >350°C conversion rate of about 65%, the jet fuel fraction accounts for 27.55% of liquid hydrocarbons; in addition, the jet fuel fraction has a selectivity of 48.8%.

Embodiment 2

[0044] Adopt the method provided by the present invention, control > 350 ℃ conversion rate is about 65%, under reaction pressure 13.0MPa, hydrogenation reactor reaction temperature 374 ℃, volume space velocity 1.2h -1 , Hydrocracking reactor reaction temperature 366°C, volume space velocity 2.0h -1 1. Under the reaction conditions of hydrogen oil volume ratio of 1200, raw material B was used for experiments, in which the 320-370°C heavy diesel oil fraction accounting for 10% of the fresh raw material B mass fraction was recycled to the inlet of the feed tank, and the product analysis data of the jet fuel fraction was listed in Table 4. It can be seen from Table 4 that the aviation kerosene obtained by back refining has a smoke point of 29.0mm and an aromatic content of 4.5%.

Embodiment 3

[0048] With the aviation coal yield (to fresh raw materials) reaching 27% as the goal, adopt the method provided by the present invention, when the reaction pressure is 13.0MPa, the hydrogenation refining reactor reaction temperature is 374 ℃, the volume space velocity is 1.2h -1 , Hydrocracking reactor reaction temperature 368°C, volume space velocity 2.0h -1 1. Under the reaction conditions of hydrogen oil volume ratio of 1200, the heavy diesel oil fraction accounting for 50% of the total heavy diesel oil mass percentage was re-smelted, and the test raw material was raw material B. The product distribution and hydrogen consumption results obtained from the test are listed in Table 6.

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Abstract

The invention discloses a hydrocracking method for selective increasing of an aviation kerosene yield. The hydrocracking method comprises that raw oil and hydrogen are mixed and then orderly undergo a hydrofinishing reaction and a hydrocracking reaction; a reaction effluent is cooled and is subjected to separation so that a heavy diesel fraction is obtained; and the heavy diesel fraction having the content of 10 to 100% and a temperature of 320 to 370 DEG C is fed back to a raw material tank and then undergoes a reaction sequentially, wherein the heavy diesel fraction has low aromatic hydrocarbon content and naphthenic hydrocarbon content and is an appropriate fraction for selective increasing of aviation kerosene yield. The hydrocracking method realizes high selectivity of an aviation kerosene fraction. The recycle heavy diesel fraction is fed into the raw material tank and undergoes a hydrofinishing reaction in a hydrofinishing reactor and a hydrocracking reaction in a hydrocracking reactor so that an aromatic hydrocarbon further undergoes a hydrogenation saturation reaction. Therefore, the hydrocracking method is conducive to improvement of a smoke point of aviation kerosene and reduction of aromatic hydrocarbon content of aviation kerosene.

Description

technical field [0001] The invention belongs to a method for obtaining low-boiling point fractionation cracking hydrocarbon oil in the presence of hydrogen, more specifically, it is a low-cost hydrocracking method for selectively increasing the production of jet fuel. Background technique [0002] The continuous development of my country's national economy has promoted the rapid improvement of transportation capacity, and the demand for air transportation fuel is also increasing recently. Usually, the sources of aviation kerosene fractions mainly include sweetening of kerosene fractions obtained through distillation equipment; kerosene fractions obtained through hydrocracking process of vacuum wax oil as aviation kerosene. The kerosene fraction obtained by the distillation unit is limited by the crude oil processing capacity and the jet fuel fraction yield, and its output is relatively fixed; while the hydrocracking process converts heavy distillate oil into light products, ...

Claims

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Application Information

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IPC IPC(8): C10G67/02
Inventor 赵阳胡志海董建伟王子文毛以朝龙湘云聂红
Owner CHINA PETROLEUM & CHEM CORP
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