Hydrocracking method for increasing yield of heavy naphtha and jet fuel fractions

A hydrocracking and jet fuel technology, which is applied in the field of hydrocracking of distillate oil or secondary processed oil to produce heavy naphtha and jet fuel fractions, can solve the problem of low selectivity, heavy naphtha and jet fuel component recovery The problems of low efficiency and short operation period of the device are achieved, and the effects of high ring-opening selectivity, reduced density, and increased hydrogen content are achieved.

Active Publication Date: 2020-05-08
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
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Problems solved by technology

[0006] In order to solve the technical problems of low yield of heavy naphtha and jet fuel components in the prior art, low selectivity and short operation period of the device, the invention provides a method for hydrocracking of multi-yield jet fuel fractions

Method used

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  • Hydrocracking method for increasing yield of heavy naphtha and jet fuel fractions
  • Hydrocracking method for increasing yield of heavy naphtha and jet fuel fractions
  • Hydrocracking method for increasing yield of heavy naphtha and jet fuel fractions

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Embodiment 1

[0071] In embodiment 1, based on the diesel fraction as a whole, the mass fraction of the diesel fraction recycled back to the hydrocracking reaction zone is 70% (the diesel fraction circulation ratio is 70%), and the yield of the resulting product heavy naphtha fraction and jet fuel fraction 30.8% and 41.7%, respectively.

Embodiment 2

[0072] In embodiment 2, based on the diesel fraction as a whole, the mass fraction of the diesel fraction recycled back to the hydrocracking reaction zone is 100% (the diesel fraction circulation ratio is 100%), and the yield of the resulting product heavy naphtha fraction and jet fuel fraction is 100%. 31.8% and 42.8%, respectively.

[0073] It can be seen that, under the high raw material conversion rate, adopting the preferred diesel oil fraction circulation ratio of the present invention, the total yield of the obtained product heavy naphtha fraction and jet fuel is higher.

Embodiment 5

[0085] After the raw material B is mixed with hydrogen, it passes through the hydrofinishing reaction zone and the hydrocracking reaction zone, and successively contacts with the hydrofinishing catalyst, hydrocracking catalyst C and hydrocracking catalyst D to react, and the obtained reaction product is separated to obtain pumice Naphtha fraction, heavy naphtha fraction, jet fuel fraction, diesel fraction and tail oil fraction, the cut point between diesel fraction and tail oil fraction is 320°C, based on the diesel fraction as a whole, recycled back to the hydrocracking reaction zone The mass fraction of the diesel fraction is 100%, and the conversion rate of the control raw material is 79%. Catalyst grading scheme, process condition parameters and product yield and property data are listed in Table 4.

[0086] From the data in Table 4, it can be seen that the yields of heavy naphtha and jet fuel obtained in Example 5 were 34.0% and 40.5%, respectively, and the hydrocracking ...

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Abstract

The invention discloses a hydrocracking method for increasing the yield of heavy naphtha and jet fuel fractions. According to the method, raw material oil and hydrogen are mixed, the obtained mixturesequentially passes through a hydrofining reaction zone and a hydrocracking reaction zone, the obtained reaction product is separated to obtain light naphtha fraction, heavy naphtha fraction, jet fuelfraction, diesel oil fraction and tail oil fraction, and part of the diesel oil fraction is circulated to the hydrocracking reaction zone, wherein the hydrocracking reaction zone is filled with a hydrocracking catalyst I and a hydrogenation catalyst II from top to bottom. By adopting the method provided by the invention, the activity and the stability of the hydrocracking catalyst can be considered, and heavy naphtha and jet fuel components can be produced to the maximum extent at a high conversion rate.

Description

technical field [0001] The invention belongs to the processing method of distillate oil or secondary processed oil under the condition of high-pressure hydrogen, more specifically, it is a hydrocracking method of distillate oil or secondary processed oil to produce heavy naphtha and jet fuel fractions. Background technique [0002] In recent years, the continuous development of my country's economy has brought about continuous growth in the demand for aviation transportation fuel and aromatic hydrocarbon raw materials. The hydrocracking process can convert heavy distillates into light products. The heavy naphtha in the light products can be used as a raw material for catalytic reforming to produce aromatics, and the jet fuel fraction can be used as high-quality No. 3 jet fuel. However, the domestic single-stage single-pass hydrocracking unit that produces middle distillate oil (diesel + jet fuel) and high-quality tail oil and reformate currently has problems such as the prod...

Claims

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Application Information

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IPC IPC(8): C10G67/02C10G67/14
CPCC10G67/02C10G67/14C10G2300/70C10G2300/1037C10G2400/04C10G2300/202C10G2300/10
Inventor 莫昌艺胡志海赵阳吴昊毛以朝赵广乐
Owner CHINA PETROLEUM & CHEM CORP
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