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Method for producing high-quality gasoline by catalyzing diesel oil hydro-conversion

A technology for catalytic diesel and hydrogenation conversion, which is applied in the fields of hydrotreating process, hydrocarbon oil treatment products, petroleum industry, etc. It can solve the problems that the product cannot reach the standard for a long time without considering it, the adjustment time is long, low, and not reached, etc., and achieves The effect of balancing activity, reducing start-up time and saving start-up cost

Pending Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem that the product cannot meet the standard for a long time in the early stage of technical operation is still not considered
[0006] The existing catalytic diesel hydroconversion industrial unit has the problem of long adjustment time at the initial stage of operation. The octane number of the 65-150 °C fraction in the first few days of industrial unit operation is very low, not reaching 80. With the gradual extension of the operating time , the research octane number gradually increases. After one month of device operation, the research octane number of the 65~150°C fraction can reach about 90. If the time is prolonged, the research octane number of the 65~150°C fraction will continue to increase , to reach more than 90

Method used

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  • Method for producing high-quality gasoline by catalyzing diesel oil hydro-conversion
  • Method for producing high-quality gasoline by catalyzing diesel oil hydro-conversion
  • Method for producing high-quality gasoline by catalyzing diesel oil hydro-conversion

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Embodiment 1~4

[0030] Embodiment 1~4 all adopts the method of the present invention, figure 1 The process flow shown. High-aromatic catalytic diesel is heated by a heating furnace and mixed with circulating hydrogen into the hydrofining reaction zone for reaction. The hydrofinishing reaction zone is equipped with four catalyst beds that are graded and filled with four kinds of FF-36 hydrogenation catalysts with different degrees of sulfidation. Examples 1-2 The degree of sulfidation of the catalyst in the first bed is ~80%, and the degrees of sulfidation of the catalysts in the second, third and fourth beds decrease by 10% one by one. Example 3 The degree of sulfurization of the catalyst in the first bed layer is ~75%, and the degrees of sulfurization of the catalysts in the second bed layer, the third bed layer, and the fourth bed layer are decreased by 10% one by one. Example 4 The degree of sulfurization of the catalyst in the first bed layer is ~70%, and the degrees of sulfurization of ...

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Abstract

The invention discloses a method for producing high-quality gasoline by catalyzing diesel oil hydro-conversion, comprising the following steps: (1) high aromatic hydrocarbon catalytic diesel oil and recycle hydrogen are mixed to enter a hydrofining reaction zone for reaction, the hydrofining reaction zone is provided with at least two catalyst beds, and the vulcanization degree of the catalyst inthe material flow direction is in a decreasing trend; (2) the generated oil obtained in the step (1) enters the hydrocracking reaction zone to be in contact with a hydrocracking catalyst to carry outa ring-opening conversion reaction of polycyclic aromatic hydrocarbon; and (3) the generated oil obtained in the step (2) passes through a separation system to obtain gas, gasoline and diesel fractions, part of the diesel fractions can be recycled back to the hydrofining reaction zone, and the rest of the diesel is discharged out of the device. By the method, the problems of long initial adjustment period and long octane number and long-term low octane number of the main target product gasoline fraction in the technical application process can be solved.

Description

technical field [0001] The invention relates to the field of petroleum refining, in particular to a method for processing catalytic diesel to produce high-quality gasoline and simultaneously producing high-quality diesel. Background technique [0002] Catalytic cracking is currently the most important secondary processing process in the petroleum refining industry, and it is also the core process of lightening heavy oil. As the world's oil becomes increasingly heavy, the processing capacity of the FCC unit is also continuously improved. Using various heavy oils as raw materials, high-octane gasoline, the main product, is obtained through catalytic cracking reactions, and a large amount of sulfur, nitrogen, and aromatics are produced at the same time. Catalytic diesel oil with high content, low cetane number or cetane index, and extremely poor stability. Moreover, the requirements of environmental protection regulations are becoming more and more stringent, and the indicator...

Claims

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Application Information

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IPC IPC(8): C10G65/00
CPCC10G65/00C10G2300/1037C10G2400/02
Inventor 彭冲曾榕辉杜艳泽孙士可
Owner CHINA PETROLEUM & CHEM CORP
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