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A kind of hydrocracking method of strengthening hydrogenation

A hydrocracking and hydrorefining technology, which is applied in the field of hydrocracking for strengthening hydrogenation, can solve the problems of excessive mercaptan sulfur content in light-end products and low quality of unconverted oil, and achieves prevention of low quality and mercaptan prevention. The effect of excessive sulfur

Active Publication Date: 2019-03-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defect that the light-end product mercaptan sulfur content exceeds the standard due to over-temperature or over-temperature in the cracking reactor, and prevent the low quality of unconverted oil caused by leakage of the high-pressure heat exchanger, and provide an enhanced Hydrocracking Process for Hydrogenation

Method used

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  • A kind of hydrocracking method of strengthening hydrogenation
  • A kind of hydrocracking method of strengthening hydrogenation
  • A kind of hydrocracking method of strengthening hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] The raw oil and hydrogen are sequentially introduced into the hydrofinishing reactor containing the first hydrofinishing catalyst and the hydrocracking reactor containing the hydrocracking catalyst for contact reaction; then the liquid phase product from the hydrocracking reactor is Introduce into a high-pressure heat exchanger for heat exchange; introduce the product obtained after heat exchange in the high-pressure heat exchanger and feed oil equivalent to one-thousandth of the weight of the feed oil introduced into the inlet of the hydrotreating reactor into the second hydrogenation The contact reaction is carried out in the post-purification reactor of the catalyst, and the liquid phase product obtained after the contact reaction is sequentially separated and fractionated to obtain a naphtha fraction (the cut point of the naphtha fraction and the aviation kerosene fraction is 145° C. ), jet fuel fraction (the cut point of jet fuel fraction and diesel fraction is 270°...

Embodiment 2

[0081] The raw oil and hydrogen are sequentially introduced into the hydrofinishing reactor containing the first hydrofinishing catalyst and the hydrocracking reactor containing the hydrocracking catalyst for contact reaction; then the liquid phase product from the hydrocracking reactor is Introduce into a high-pressure heat exchanger for heat exchange; introduce the product obtained after heat exchange in the high-pressure heat exchanger and feed oil equivalent to one-thousandth of the weight of the feed oil introduced into the inlet of the hydrotreating reactor into the second hydrogenation The contact reaction is carried out in the post-purification reactor of the catalyst, and the liquid phase product obtained after the contact reaction is sequentially separated and fractionated to obtain a naphtha fraction (the cut point of the naphtha fraction and the aviation kerosene fraction is 145° C. ), jet fuel fraction (the cut point of jet fuel fraction and diesel fraction is 270°...

Embodiment 3

[0083] The raw oil and hydrogen are sequentially introduced into the hydrofinishing reactor containing the first hydrofinishing catalyst and the hydrocracking reactor containing the hydrocracking catalyst for contact reaction; then the liquid phase product from the hydrocracking reactor is Introduce into a high-pressure heat exchanger for heat exchange; introduce the product obtained after heat exchange in the high-pressure heat exchanger and feed oil equivalent to one-thousandth of the weight of the feed oil introduced into the inlet of the hydrotreating reactor into the second hydrogenation The contact reaction is carried out in the post-purification reactor of the catalyst, and the liquid phase product obtained after the contact reaction is sequentially separated and fractionated to obtain a naphtha fraction (the cut point of the naphtha fraction and the aviation kerosene fraction is 145° C. ), jet fuel fraction (the cut point of jet fuel fraction and diesel fraction is 270°...

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Abstract

The invention relates to the field of oil refining, and discloses a hydrocracking method with reinforced hydrogenation. The method comprises the following steps: (1) in the existence of a hydrogen containing material flow, raw oil is introduced in to a hydrofinishing reactor containing a first hydrorefining catalyst agent and a hydrocracking reactor containing a hydrocracking catalyst in order for carrying out a contact reaction; (2) a liquid phase product from the hydrocracking reactor is introduced into a high pressure heat exchanger for carrying out heat exchange; (3) the product obtained in the step (2) is introduced into an after-refining reactor containing a second hydrocracking catalyst for carrying out a contact reaction, after the contact reaction, separation and fractionation are carried out for the obtained liquid phase product in order, and a naphtha fraction, a jet fuel fraction, a diesel oil fraction and a tail oil fraction are obtained. The method can prevent problems of low quality of unconverted oil due to seepage of the high pressure heat exchanger, and exceeding standard of light end mercaptan sulfur due to overtemperature at the bottom of the hydrocracking reactor.

Description

technical field [0001] The invention relates to the field of oil refining, in particular to a hydrocracking method for strengthening hydrogenation. Background technique [0002] "Hydrocracking process" is one of the main processes in fuel-based refineries. The hydrocracking process uses low-quality raw materials such as vacuum gas oil as feedstock, which can maximize the yield of light fuel oils such as gasoline, diesel, and aviation fuel, which not only meets the social demand for light fuels, but also maximizes corporate benefits change. [0003] The usual hydrocracking process includes a refining section and a cracking section (two reactors are set up), wherein the first reactor is filled with a hydrotreating catalyst (refining section) to remove impurities such as sulfur and nitrogen in the raw material, The second reactor is mainly filled with hydrocracking catalyst (cracking section), which is used to distill and crack wax oil to generate light fuel. In addition, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/12
Inventor 赵阳蒋东红赵广乐毛以朝龙湘云
Owner CHINA PETROLEUM & CHEM CORP