Method and equipment for improving selectivity of light olefins

A low-carbon olefin and selectivity technology, applied in the field of olefin preparation, can solve the problem of low selectivity of low-carbon olefins, achieve the effect of improving the selectivity of low-carbon olefins, saving floor space and investment, and reducing the temperature of reaction oil

Active Publication Date: 2022-06-07
SINOPEC LUOYANG PETROCHEM ENG CORP +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the problem of low selectivity of low-carbon olefins existing in the prior art, and provides a new method and equipment for improving the selectivity of low-carbon olefins

Method used

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  • Method and equipment for improving selectivity of light olefins
  • Method and equipment for improving selectivity of light olefins

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Embodiment Construction

[0050] like figure 1 As shown, the raw material oxygen-containing compound 2 (mainly including methanol, dimethyl ether, C4-C10 alcohol compounds or their mixtures) enters the reactor 3 after preheating, and the oxygen-containing compound 2 in the reactor 3 is mixed with the pre-reaction section. The high-temperature regenerated catalyst of 7 directly contacts, and the exothermic reaction is carried out rapidly on the surface of the catalyst. After the catalyst, it is drawn out from the top of the reactor 3 and sent to the rear quench water washing system after heat exchange. The catalyst recovered by the built-in separation facility 6 is discharged to the outside of the reactor 3 through the waste catalyst conveying pipe 19 . After the reaction, the coke-deposited catalyst enters the stripper 1 to be stripped to remove the oil and gas entrained in the catalyst. After coking in the regenerator 13, the regenerated catalyst enters the regeneration stripper 10 for stripping and...

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Abstract

The invention discloses a method and equipment for improving the selectivity of low-carbon olefins, which are composed of the following steps: 1) the oxygen-containing compound raw material enters the reactor and contacts with the regenerated catalyst from the pre-reaction section for exothermic reaction; 2) in step 1) The reaction gas enters the built-in separation facility of the reactor to remove the entrained catalyst after removing the catalyst carried; 3) In step 1), the coke-deposited catalyst after the reaction enters the regenerator for charred regeneration; 4) Step 3) The regenerated catalyst enters the regenerated stripper for stripping and cooling, and then enters the pre-reaction section; 5) The pre-reaction medium enters the pre-reaction section after gasification, undergoes an endothermic reaction with the regenerated catalyst, and then enters the reactor. The advantages of adopting the method and equipment provided by the present invention are: by setting the pre-reaction section, the occurrence of unintended reactions is reduced, and the selectivity of low-carbon olefins is improved; by the built-in sleeve in the reactor, the dilute phase space of the reactor is shortened , improving the selectivity of low carbon olefins.

Description

technical field [0001] The invention belongs to the technical field of olefin preparation, and relates to a method and equipment for improving the selectivity of low-carbon olefins in the continuous reaction and regeneration process of generating low-carbon olefins using oxygen-containing compounds as raw materials. Background technique [0002] Light olefins (ethylene, propylene, butadiene) and light aromatics (benzene, toluene, xylene) are the basic raw materials for petrochemicals. The traditional production route of ethylene and propylene is produced through naphtha cracking, and its disadvantage is that it relies too much on petroleum. The production of low-carbon olefins such as ethylene and propylene from methanol (Methanol-To-Olefin, MTO for short) is another process route for producing olefins, and the current process technology development has become mature. The industrialization of MTO technology has opened up a new process route for the production of basic petro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/20C07C11/02
CPCC07C1/20C07C11/02Y02P20/584
Inventor 刘昱乔立功施磊张洁昌国平李海瑞
Owner SINOPEC LUOYANG PETROCHEM ENG CORP
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