C4 fraction catalytic onversion method for yielding propylene

A technology of C4 fraction and propylene, applied in the field of catalytic conversion, can solve problems such as reducing the yield of dry gas, and achieve the effects of taking into account the heat balance, the increase of the conversion rate, and the increase of the yield of propylene

Inactive Publication Date: 2007-06-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] To sum up, the prior art has not involved using the C4 fraction rich in olefins as the activator of the pre-coke catalyst, and then using the activated catalyst to convert the C4 fraction rich in olefins, thereby increasing the production of propylene and reducing the dry gas yield process

Method used

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  • C4 fraction catalytic onversion method for yielding propylene

Examples

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Comparison scheme
Effect test

Embodiment 1

[0034] In this example, the C4 fraction rich in olefins is used as the raw material, and the BBC-3 catalyst with a pre-coke amount of 0.25% is used, and the test results of the single-pass catalytic conversion are carried out in two stages in a small fluidized bed reactor.

[0035] As shown in Table 1, the olefin-rich C4 fraction first enters the fluidized bed reactor, and at a reaction temperature of 620 ° C, it is contacted with a BBC-3 catalyst with a pre-coke amount of 0.25% to activate stripping, collect and analyze The reaction product does not undergo coke regeneration of the catalyst, but continues to pass through the C4 fraction shown in Table 1 to contact the catalyst for reaction. The reaction product, steam and spent agent are separated in the settler, and the reaction product is separated to obtain gas product and liquid product, while the spent catalyst is stripped by water vapor to remove the hydrocarbon product adsorbed on the spent agent. The stripped spent ag...

Embodiment 2

[0042] In this example, the C4 fraction rich in olefins is used as the raw material, and the BBC-3 catalyst with a pre-coke content of 0.36% is used, and the experimental results of the single-pass catalytic conversion are carried out in two stages in a small fluidized bed reactor.

[0043] The C4 fraction rich in olefins as shown in Table 1 first enters the fluidized bed reactor, and is contacted with the BBC-3 catalyst with a pre-coke amount of 0.36% to activate the stripping at a reaction temperature of 620 ° C, collect and The reaction product was analyzed, and the coke regeneration of the catalyst was not carried out, but the C4 fraction shown in Table 1 was continued to be introduced into the catalyst for contact reaction. The reaction product, steam and spent agent are separated in the settler, and the reaction product is separated to obtain gas product and liquid product, while the spent catalyst is stripped by water vapor to remove the hydrocarbon product adsorbed on t...

Embodiment 3

[0051] In this example, the C4 fraction rich in olefins is used as the raw material, and the BBC-3 catalyst with a pre-coke amount of 0.55% is used, and the catalytic conversion is carried out in two stages in a small fluidized bed reactor.

[0052] As shown in Table 1, the olefin-rich C4 fraction first enters the fluidized bed reactor, and at a reaction temperature of 620 ° C, it contacts with a BBC-3 catalyst with a pre-coke amount of 0.55% to activate stripping, collect and analyze The reaction product does not undergo coke regeneration of the catalyst, but continues to pass through the C4 fraction shown in Table 2 to contact the catalyst for reaction. The reaction product, steam and spent agent are separated in the settler, and the reaction product is separated to obtain gas product and liquid product, while the spent catalyst is stripped by water vapor to remove the hydrocarbon product adsorbed on the spent agent. The stripped spent agent was regenerated in contact with h...

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Abstract

A C4 fraction catalytic conversion method to increase the production of propylene is to infuse C4 fraction being rich in olefin into fluidized bed or lift pipe reactor in two or more stages, contact the zeolite catalyst with five-ring and pre-carbon-deposition capacity being 0.01 ~ 2.0w% to react, separate reaction products and catalyst to be produced. The catalyst to be produced is processed with stripping, regeneration, pre-carbon-deposition, and then returned to the reactor for recycling, and C4 fraction of the products can be taken back for refining. The method uses C4 fraction to activate the pre-carbon-deposition catalyst, to increase the conversion rate of C4 olefin and the yield of propylene.

Description

technical field [0001] The present invention relates to a process for the catalytic conversion of hydrocarbons in the absence of hydrogen. Background technique [0002] With the continuous development of the ethylene industry at home and abroad and the improvement of refining production capacity, the output of by-product C4 fractions continues to increase. It is economically attractive to convert low-value C4 fractions into high-value propylene and ethylene. C4 olefins catalytic cracking technology to produce propylene has developed rapidly in recent years. The Superflex process developed by ARCO is a technology to produce small olefins mainly propylene with low-value C4 and C5 olefins as raw materials. However, due to the high cracking temperature of C4 and coke The production rate is low, and the continuous reaction regeneration type of the device often needs to supplement heat. [0003] The yield of small molecular olefins in the conventional catalytic cracking process i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/06C07C11/06
CPCY02P20/52
Inventor 崔淑新朱根权高永灿张久顺谢朝钢
Owner CHINA PETROLEUM & CHEM CORP
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