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Hydrocracking method for improving aromatic potential of heavy naphtha

A technology for hydrocracking and heavy naphtha, which is applied in the petroleum industry, hydroprocessing process, and hydrocarbon oil treatment, and can solve the problems of energy consumption and poor economy

Active Publication Date: 2021-07-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the tail oil can be used as a high value-added product, and the energy consumption and economy after the cycle are poor

Method used

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  • Hydrocracking method for improving aromatic potential of heavy naphtha
  • Hydrocracking method for improving aromatic potential of heavy naphtha
  • Hydrocracking method for improving aromatic potential of heavy naphtha

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The average temperature of the hydrofinishing reactor is 356°C, the cut point of the light and heavy fraction is 480°C, and the space velocity of the hydrofinishing agent in the hydrocracking reactor is 6.0 h -1 , the hydrocracking agent space velocity is 1.8h -1 . The light fraction enters the inlet of the second reaction zone of the hydrocracking reactor, and the heavy fraction directly enters the inlet of the hydrocracking reactor. Other process conditions are shown in Table 3.

Embodiment 2

[0045] The average temperature of the hydrofinishing reactor is 356°C, the cut point of the light and heavy fraction is 500°C, and the space velocity of the hydrofinishing agent in the hydrocracking reactor is 8.0 h -1 , the hydrocracking agent space velocity is 1.8h -1 . The light fraction enters the inlet of the second reaction zone of the hydrocracking reactor, and the heavy fraction directly enters the inlet of the hydrocracking reactor. Other process conditions are shown in Table 3.

Embodiment 3

[0047] The average temperature of the hydrofining reactor is 360 °C, the cut point of the light and heavy fraction is 480 °C, and the space velocity of the hydrofinishing agent in the hydrocracking reactor is 6.0 h -1 , the hydrocracking agent space velocity is 1.8h -1 . The light fraction enters the inlet of the second reaction zone of the hydrocracking reactor, and the heavy fraction directly enters the inlet of the hydrocracking reactor. Other process conditions are shown in Table 3.

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Abstract

The invention discloses a hydrocracking method for improving aromatic potential of heavy naphtha. The method comprises the following steps: (1) high-nitrogen raw oil and hydrogen are fed into a hydrogenation reactor, and hydrofining reaction is conducted at the reaction temperature of 350-370 DEG C; (2) hydrofining generated oil is divided into a light fraction and a heavy fraction, wherein the cutting temperature of the light fraction and the heavy fraction is 440-520 DEG C; (3) a hydrocracking reactor comprises an upstream hydrofining catalyst bed layer and a downstream hydrocracking catalyst, the light fraction directly enters the middle of a hydrocracking reactor bed, the heavy fraction enters from an inlet of the cracking reactor and is sequentially subjected to contact reaction with hydrofining and hydrocracking catalysts; and (4) separation and fractionation are conducted on hydrocracking effluent to obtain hydrocracking products including heavy naphtha. According to the method, the aromatic hydrocarbon potential content of the obtained heavy naphtha component is increased, and the method has a relatively high application prospect.

Description

technical field [0001] The invention relates to a hydrogenation process, which is especially suitable for processing high-nitrogen raw materials in the process of hydrocracking process. By precisely controlling the hydrorefining reaction, cutting and feeding the refined oil in sections, the increase in heavy stone can be realized. The potential target of naphtha. Background technique [0002] Hydrocracking technology has the characteristics of high production flexibility, strong adaptability of raw materials and high product quality, and plays a mainstay role in adjusting the production balance of the whole plant. Hydrocracking process products include natural gas, liquefied petroleum gas, naphtha, jet fuel, diesel and tail oil. Traditional hydrocracking technology mainly produces naphtha or middle distillates according to market changes. [0003] With the drastic changes in my country's motor vehicle consumption market, the diesel-gasoline ratio continues to decrease. It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2400/04C10G2400/26
Inventor 张霞曹正凯吴子明王仲义彭冲
Owner CHINA PETROLEUM & CHEM CORP
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