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Method for high-yield low carbon olefin and system for high-yield low carbon olefin

A low-carbon olefin and reactor technology, which is applied in the treatment of hydrocarbon oil, hydrocarbon oil treatment products, petroleum industry, etc., can solve the problem of limited increase in propylene yield, and achieve the effect of extending the operation period

Active Publication Date: 2018-03-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process improves the adaptability of the residual oil feedstock and the service life of the fixed-bed catalyst, but the combined process can only increase the propylene yield to a limited extent

Method used

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  • Method for high-yield low carbon olefin and system for high-yield low carbon olefin
  • Method for high-yield low carbon olefin and system for high-yield low carbon olefin
  • Method for high-yield low carbon olefin and system for high-yield low carbon olefin

Examples

Experimental program
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Effect test

Embodiment 1

[0105] This embodiment adopts figure 1 The process flow diagram shown is carried out, specifically:

[0106] Introducing the residual oil raw material with properties shown in Table 1 into an ebullating bed hydrocracking reaction zone for hydrocracking reaction to obtain hydrocracking reaction effluent;

[0107] The hydrocracking reaction effluent is separated, and the hydrogen-rich gas in the gas phase product at the top of the separated high-pressure separator is processed by a circulating hydrogen compressor to obtain circulating hydrogen, and the circulating hydrogen is used to circulate back to the ebullated bed for hydrogenation In the cracking reaction zone, the separated liquid-phase product is introduced into the fractionating tower for fractionation to obtain the first dry gas and the first liquefied gas (note: the content of low-carbon olefins in the first liquefied gas is very small, therefore, in the embodiment The yield of low-carbon olefins in the results does ...

Embodiment 2-3

[0123] Embodiment 2-3 is carried out using the same process flow as Example 1. The difference is that the reaction conditions and product distribution in the ebullated bed hydrocracking reaction zone of Embodiment 2-3 are as shown in Table 3, and the catalytic cracking The reaction conditions in the reaction zone are shown in Table 4. The product distribution obtained by the method of Examples 2-3 is shown in Table 4.

Embodiment 4

[0125] The present embodiment adopts the method similar to embodiment 1 to carry out, and difference is that the reaction temperature in the third reactor of the catalytic cracking reaction zone of the present embodiment is 30 ℃ higher than the reaction temperature in the second reactor, specifically , The reaction conditions and product distribution of the ebullating bed hydrocracking reaction zone of this embodiment are shown in Table 3, and the reaction conditions of the catalytic cracking reaction zone are shown in Table 4. The product distribution obtained by the method of this embodiment is shown in Table 4.

[0126] From the above results of the present invention, it can be seen that the method of the present invention organically combines the fluidized bed residual oil hydrogenation process with the catalytic cracking process according to the properties and characteristics of the fluidized bed residual oil hydrocracking product, which can significantly improve the propy...

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Abstract

The invention relates to the field of residual oil utilization and discloses a method for high-yield low carbon olefin and a system for high-yield low carbon olefin. The method comprises the followingsteps: introducing a residual oil raw material into a fluidized bed hydrocracking reaction zone, performing a hydrocracking reaction, separating a hydrocracking reaction effluent, introducing a wax oil fraction into a first reactor and a second reactor in sequence, carrying out a catalytic cracking reaction, and introducing first light naphtha into a third reactor in a catalytic cracking reactionzone, and performing another catalytic cracking reaction; separating catalytic cracking products obtained from the second reactor and the third reactor in the catalytic cracking reaction zone, respectively circulating circulation oil and second light naphtha into the first reactor and the third reactor in the catalytic cracking reaction zone, and circulating catalytic cracking oil pulp into the fluidized bed hydrocracking reaction zone. With the organic combination of a fluidized bed residual oil hydrogenation process with a catalytic cracking process, the yield of high-value products such aspropylene and ethylene in the combined processes can be remarkably increased.

Description

technical field [0001] The present invention relates to the field of residual oil utilization, in particular, to a method for producing more low-carbon olefins and a system for producing more low-carbon olefins, and more specifically, to an ebullated-bed residual oil hydrocracking and catalytic A method for producing more light olefins in a cracking combination process and a system for producing more light olefins. Background technique [0002] The traditional petrochemical industry is based on steam cracking to produce ethylene. In my country, the main raw material for steam cracking is naphtha. However, in recent years, with the rising oil price and the continuous maturity of shale gas exploitation technology, the wide application of steam cracking devices using shale gas as raw material in North America continues to squeeze the oil industry. Naphtha is the economy of ethylene cracking raw material process. Compared with the ethylene product market, propylene has been les...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G69/04
CPCC10G69/04C10G2300/1037C10G2400/20
Inventor 梁家林任亮蒋东红赵阳胡志海陈学峰龙湘云
Owner CHINA PETROLEUM & CHEM CORP
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