Regeneration method of catalyst for producing aromatic hydrocarbon from organic oxide through catalytic conversion

A technology of organic oxides and catalytic conversion, applied in the direction of catalyst regeneration/reactivation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of regeneration systems that do not involve the reaction of organic oxides to aromatics, and have not proposed specific regeneration systems form, low catalyst recovery rate, etc., to achieve the effect of reducing operating costs, reducing floor space and equipment investment, and reducing hydrothermal deactivation

Active Publication Date: 2016-10-05
SINOPEC ENG +1
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Problems solved by technology

The above-mentioned patents also focus on investigating the influence of different catalyst compositions and the modification of rare metals and rare earth metals on the aromatization process. CN 1880288A and CN 101823929B mainly propose the influence of cyclic aromatization of reaction products on the yield of aromatic hydrocarbons, but these patents have not yet Reaction regeneration system involving organic oxides to aromatics
[0006] Chinese patent CN 101244969A discloses a device and method for continuous aromatization and catalyst regeneration, the device includes an aromatization fluidized bed and a fluidized bed for continuous catalyst regeneration and is arranged between the two fluidized beds The pipeline and solid conveying device used for catalyst transportation, but the patent does not propose the specific form of the regeneration system, and there are some problems: the

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  • Regeneration method of catalyst for producing aromatic hydrocarbon from organic oxide through catalytic conversion

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[0045] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0046] The invention provides a method for regenerating catalysts for catalytic conversion of organic oxides to aromatics, the method comprising: sending the spent catalyst from the reaction system for catalytic conversion of organic oxides to aromatics into a first regenerator and from the first regenerator The first oxygen-containing gas at the bottom is contacted and the first regeneration is performed at a regeneration temperature of 500-650° C. to obtain the semi-regenerated catalyst and the first regenerated flue gas; wherein the hydrogen element weight of the coke contained in the semi-regenerated catalyst is controlled to be 0-40% by weight of the hydrog...

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Abstract

The invention discloses a regeneration method of a catalyst for producing aromatic hydrocarbon from organic oxide through catalytic conversion. The method includes the steps of: 1) feeding a to-be-regenerated catalyst from a system of producing the aromatic hydrocarbon from the organic oxide through the catalytic conversion to a first regenerator to contact the catalyst with a first oxygen-containing gas to perform first regeneration at 500-650 DEG C to obtain a semi-regenerated catalyst and a first regeneration flue gas; and 2) feeding the semi-regenerated catalyst to a second regenerator to contact the catalyst with a second oxygen-containing gas to perform second regeneration at 600-750 DEG C to obtain the regenerated catalyst and a second regeneration flue gas, and then feeding the regenerated catalyst back into a system of producing the aromatic hydrocarbon from the organic oxide through catalytic conversion, wherein the two regenerators are arranged in an up-and-down manner and the first regenerator is arranged above the second regenerator. Compared with the prior art, the method is safer and is low in hydrothermal deactivation and loss rate of the catalyst.

Description

technical field [0001] The invention relates to a regeneration method of a catalyst for producing aromatic hydrocarbons by catalytic conversion of organic oxides. Background technique [0002] Aromatics is an important organic chemical basic raw material, among which benzene, toluene and xylene (including o-xylene, m-xylene and p-xylene) are widely used, and their end products are used in synthetic resin, synthetic fiber, synthetic rubber, Coatings, dyes and pharmaceuticals and other fields. With the development of my country's economy and society, the demand for aromatics is also increasing. At present, the annual consumption of aromatics in my country exceeds 20 million tons, but half of them need to be imported from abroad. [0003] Benzene, toluene and xylene mainly come from the petrochemical industry. The aromatics produced by domestic petrochemical routes account for more than 85% of the total aromatics production. The production technologies mainly include: naphtha ...

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Application Information

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IPC IPC(8): B01J38/20
Inventor 吴雷江盛阳余龙红程建民杨启业段丹黄泽川
Owner SINOPEC ENG
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