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A method for prolonging the quality stability of hydrocracking products

A technology for hydrocracking and product quality, which is applied in hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc. It can solve the problems of high bromine index and exceeding standard of heavy naphtha, reduce acidity and hydrogenation performance, delay Effects of coking inactivation, improving and stabilizing product quality

Active Publication Date: 2021-07-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problems in the prior art that the olefins that commonly exist in the late stage of the hydrocracking reaction process using post-treatment catalysts exceed the standard, that is, the bromine index of heavy naphtha is too high, the mercaptans are too high, and the sulfur of aviation fuel products exceeds the standard. The use of grading and temperature control provide a method to improve the quality stability of hydrocracking products

Method used

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  • A method for prolonging the quality stability of hydrocracking products
  • A method for prolonging the quality stability of hydrocracking products
  • A method for prolonging the quality stability of hydrocracking products

Examples

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Embodiment 1

[0038] use figure 1 In the process flow shown, A and B are used for the treatment catalyst, C1 is used for the cracking catalyst, the conversion rate of the reaction mass is controlled to 95%, the operation time is 14 months, and the bromine index of heavy naphtha is sampled and analyzed.

Embodiment 2

[0042] use figure 1 In the process flow shown, A and B are used for the treatment catalyst, C2 is used for the cracking catalyst, the conversion rate of the reaction mass is controlled to 94%, and the operation time is 16 months. Sampling and analysis of bromine index of heavy naphtha is carried out.

Embodiment 3

[0046] use figure 1 In the process flow shown, A and B are used for the treatment catalyst, C3 is used for the cracking catalyst, the reaction mass conversion rate is controlled to 95%, the operation time is 18 months, and the heavy naphtha bromine index is sampled and analyzed.

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Abstract

The invention discloses a method for prolonging the quality stability of hydrocracking products. The hydrocracking reaction is carried out. Four hydrocracking catalyst beds are arranged in the hydrocracking reactor. When the conversion rate of the fraction above 350°C in the hydrocracking feedstock is 90-99%, any of the hydrocracking The top and the bottom of the reactor bed are all provided with a hydrogenation post-treatment catalyst bed, and the volume ratio of the post-treatment catalyst packed along the flow direction is 3-7:5-15:5-25:20-40:30-50, plus The volume ratio of the hydrogenation post-treatment catalyst filled in the hydrocracking reactor to the hydrocracking catalyst filled in the hydrocracking reactor is 1:6~8, and the hydrocracking products are separated to obtain various products. The method can obviously improve the stability of hydrocracking products.

Description

technical field [0001] The invention relates to a method for prolonging the quality stability of hydrocracking products, in particular to a method for prolonging the quality stability of heavy naphtha products in late hydrocracking products during long-term operation. Background technique [0002] The hydrocracking process is under the action of hydrogen, high temperature, high pressure and catalysts to hydrodesulfurize, hydrodenitrogenate, polycyclic aromatic hydrocarbons, hydrosaturation and ring-opening cracking of heavy distillate oils (VGO, CGO, DAO). The process of converting into light oil and middle distillate oil has the characteristics of flexible operation, good product quality and environmental friendliness. As one of the main processes for the deep processing of heavy distillate oil, it is not only the production of light oil products in the refining industry It has become an important means of petrochemical enterprises, and has become the key technology of petr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/12
Inventor 王仲义崔哲彭冲孙士可吴子明曹正凯
Owner CHINA PETROLEUM & CHEM CORP
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