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Hydrocracking method improving yield of liquid product

A hydrocracking and hydrofining technology, which is applied in the fields of hydroprocessing process, petroleum industry, and hydrocarbon oil treatment, can solve the problem of reducing hydrocracking liquid, high gasification rate of hydrocracking reactor, and inability of light components Issues such as reactors are timely derived to achieve the effects of increasing liquid recovery, reducing secondary or multiple cracking reactions, and increasing liquid product yield

Active Publication Date: 2015-05-27
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The gasification rate in the hydrocracking reactor is relatively high, especially in the lower catalyst bed of the cracking reactor, many light components that are cracked once cannot be exported to the reactor in time, and undergo secondary or multiple cracking to generate C 1 ~C 4 products, reducing the hydrocracking liquid yield

Method used

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  • Hydrocracking method improving yield of liquid product

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Experimental program
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Effect test

Embodiment 1

[0031]One-stage serial one-pass process is adopted, and the hydrocracking reactor is equipped with two catalyst beds, and the gas phase extraction pipeline is arranged between the catalyst beds to communicate with the high-pressure separator, and is adjusted by the flow control valve. 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. The flow rate of the gaseous material drawn from the gaseous phase lead-out pipeline is 50% of the circulating hydrogen flow rate by volume.

Embodiment 2

[0040] By the flow process and method of embodiment 1, the gas phase material flow that the gas phase extraction pipeline draws is 20% of the circulation hydrogen flow by volume, C 5 + The liquid yield (quality) was 95.47%. The gas phase material flow rate drawn by the gas phase extraction pipeline is 70% of the circulating hydrogen flow rate by volume, and C 5 + The liquid yield (quality) was 97.31%.

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Abstract

The invention provides a hydrocracking method improving the yield of liquid products. A gas phase discharge pipeline is disposed at the middle of a catalyst bed layer. In a material flow at the upper part of the catalyst bed layer, a part of hydrocracked gas-phase light fractions and a part of hydrogen are fed into a high-pressure separator through a flow adjustment valve on the gas phase discharge pipeline, while a liquid phase and a left gas-phase mixed material flow are contacted with a catalyst downwardly for continuously carrying out a hydrocracking reaction. The part of the hydrocracked gas-phase light fractions is directly fed into the high-pressure separator so that a secondary hydrocracking reaction or a multiple hydrocracking reaction is reduced. The hydrocracking method can increasing the yield of liquid products, can reduce the consumption of hydrogen, and can prolong the service life of the catalyst.

Description

technical field [0001] The invention relates to a hydrocracking method for increasing liquid yield, which belongs to the field of petrochemical industry. 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 production of light oil products in the oil refining industry, but also has become a key technology for petrochemical enterprises, playing an irreplaceable role in other processes. [0003] C in hydrocracking products 1 ~C 4 The economic value of the product is low and the hydrogen consumption is large, so the technicians 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 raw oil). Depending on the nature of raw materials, the desired target product and process conditions, the gas yield will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/12
CPCC10G65/12
Inventor 王喜彬贾丽郭蓉曾榕辉蒋立敬
Owner CHINA PETROLEUM & CHEM CORP
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