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A method for reverse sequence hydrocracking

A hydrocracking and hydrofining technology, which is applied in the fields of hydrotreating process, petroleum industry, hydrocarbon oil treatment, etc., can solve the problem of not considering the deep cracking of light components, so as to increase the yield of liquid products and reduce the product Charcoal, the effect of increasing the depth of conversion

Active Publication Date: 2017-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method realizes the direct production of clean motor fuel and high-quality chemical raw materials from wide-fraction raw materials in a hydrogenation system, but it does not take into account how to avoid deep cracking of some light components in cracking reactions

Method used

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  • A method for reverse sequence hydrocracking
  • A method for reverse sequence hydrocracking
  • A method for reverse sequence hydrocracking

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Embodiment 1

[0032] The hydrocracking reactor is equipped with two catalyst beds, and a gas-phase lead-out pipeline is set between the two catalyst beds to communicate with the high-pressure separator. The properties of raw materials are shown in Table 1, and the catalysts, process conditions and results are shown in Table 2. Catalyst FF-26 is a commercial hydrorefining catalyst developed and produced by Fushun Petrochemical Research Institute, and FC-24 is a commercial hydrocracking catalyst developed and produced by Fushun Petrochemical Research Institute.

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Abstract

The invention discloses a method for reverse sequence hydrocracking. After the raw material, hydrogen and hydrocracking oil are mixed, they enter the hydrorefining reactor for reaction; the hydrofinishing effluent enters the separator and fractionation system to obtain the product and circulating oil; the circulating oil is mixed with hydrogen and enters the hydrocracking reaction The cracking reaction is carried out in the presence of a hydrocracking catalyst; at least two catalyst beds are arranged in the hydrocracking reactor, and a gas phase extraction pipeline is set between two adjacent catalyst beds; the gas phase stream is drawn to the In the high-pressure separator, the liquid phase passes through the catalyst bed below and is in countercurrent contact with the hydrogen entering from the bottom of the reactor to carry out the hydrocracking reaction. The process of the present invention is simple and easy to operate; since the cracked gas-phase light components are drawn out and directly enter the high-pressure separator, the secondary or multiple cracking reactions of this part of the light components are reduced, thereby effectively increasing the hydrocracking efficiency. Liquid product yield.

Description

Technical field [0001] The invention relates to a reverse sequence hydrocracking method, which belongs to the field of petroleum refining. Background technique [0002] Hydrocracking is one of the main processes for the deep processing of heavy distillates. It is not only an important means for the refining industry to produce light oils, but also has become a key technology for petrochemical companies, playing an irreplaceable role for other processes. [0003] C in hydrocracking products 1 ~C 4 The economic value of the product is low and the amount of hydrogen consumed is large, so the process personnel will try to reduce the gas yield and increase the liquid yield on the premise of ensuring stable operation and product quality. [0004] The gas yield of the hydrocracking process is usually 4% to 6% (based on the quality of the feedstock oil). Depending on the nature of the raw material, the desired product and the process conditions, the gas yield will vary. In general, the gas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
Inventor 杜正军曾榕辉郭蓉王喜彬
Owner CHINA PETROLEUM & CHEM CORP
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