A kind of regeneration method of organic oxide catalytic conversion to aromatics catalyst

Abstract

The invention discloses a regeneration method of a catalyst for producing aromatic hydrocarbon from an 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 parallel. 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 ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a regeneration method for the catalytic conversion of organic oxides to aromatics catalysts. This method overcomes the problems of the existing catalytic conversion of organic oxides to aromatics catalyst regeneration methods. On the one hand, it can reduce the deactivation of catalysts and reduce the On the other hand, it can greatly increase the safety of the regenerative system

Images