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Method for preparing aromatic hydrocarbons through conversion of methanol

A technology for methanol and aromatic hydrocarbons, which is applied in the field of catalytic conversion of methanol to aromatic hydrocarbons, and can solve the problems of low yield of aromatic hydrocarbons and the like

Active Publication Date: 2019-04-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the technical problem of low yield of aromatics in the prior art, and a method for producing aromatics by catalytic conversion of methanol is provided, which has the advantage of high yield of aromatics

Method used

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  • Method for preparing aromatic hydrocarbons through conversion of methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The methanol feedstock enters the fluidized bed reactor and the modified ZSM-5 catalyst is contacted and reacted to obtain the product containing aromatics and the spent catalyst. The stripped spent catalyst enters the riser regenerator and contacts the regeneration medium I at 500℃ For scorching, the outlet of the riser regenerator is connected with a set of closed cyclone separators, the semi-regenerated catalyst separated by the closed cyclone separator enters the fluidized bed regenerator and the regeneration medium II contacts the condition of 630℃ to continue scorching The regenerated catalyst is obtained. The regenerated catalyst enters the degassing tank, and the degassed product is returned to the fluidized bed regenerator; the temperature of the regenerated catalyst after degassing is 450°C; after degassing, 50% of the regenerated catalyst is returned to the riser regenerator; after degassing, it is regenerated 50% of the catalyst is returned to the fluidized be...

Embodiment 2

[0037] According to the conditions and steps described in Example 1, the spent catalyst enters the riser regenerator and contacts the regeneration medium I for coking at 600°C, and the semi-regenerated catalyst enters the fluidized bed regenerator and contacts the regeneration medium II at 700°C. Continue to burn under the conditions of, the temperature of the regenerated catalyst after degassing is 550℃; 90% of the regenerated catalyst after degassing is returned to the riser regenerator; 10% of the regenerated catalyst after degassing is returned to the fluidized bed reactor; the riser is regenerated The residence time of the catalyst in the vessel is 1 second; the mass ratio of hydrogen to carbon element of the coke on the semi-regenerated catalyst is 0.06; the volume percentage of oxygen in the regeneration medium I is 30%. The carbon content of the regenerated catalyst is 0.01% in terms of catalyst mass percentage. The degassing tank is equipped with an external heat extra...

Embodiment 3

[0042] According to the conditions and steps described in Example 1, the spent catalyst enters the riser regenerator and contacts the regeneration medium I for coking at 550°C, the semi-regenerated catalyst enters the fluidized bed regenerator and contacts the regeneration medium II at 650°C. Continue to burn under the conditions of, the temperature of the regenerated catalyst after degassing is 500℃; 70% of the regenerated catalyst after degassing is returned to the riser regenerator; 30% of the regenerated catalyst after degassing is returned to the fluidized bed reactor; the riser is regenerated The residence time of the catalyst in the vessel is 3 seconds; the mass ratio of hydrogen and carbon element of the coke on the semi-regenerated catalyst is 0.02; the volume percentage of oxygen in the regeneration medium I is 25%. The carbon content of the regenerated catalyst is 0.05% in terms of catalyst mass percentage. The degassing tank is equipped with an external heat extract...

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Abstract

The invention relates to a method for preparing aromatic hydrocarbons through catalytic conversion of methanol. A purpose of the present invention is mainly to solve the problems of low aromatic hydrocarbon yield and serious hydrothermal deactivation of the catalyst in the prior art. According to the technical scheme, a methanol raw material enters a fluidized bed reactor, and is subjected to a contact reaction with a modified ZSM-5 catalyst to obtain an aromatic hydrocarbon-containing product and a spent catalyst; the steam stripped spent catalyst enters a riser regenerator, and contacts a regeneration medium I, and charring is performed at a temperature of 500-600 DEG C; the outlet of the riser regenerator is connected to at least a set of closed cyclone separators; the semi-regeneratedcatalyst separated by the closed cyclone separators enter a fluidized bed regenerator, and contacts a regeneration medium II, and charring is continuously performed at a temperature of 630-700 DEG C;the regenerated catalyst enters a degassing tank; and the degassed product returns to the fluidized bed regenerator. With the technical scheme, the problems in the prior art are well solved. The method of the present invention can be used in the industrial production of aromatic hydrocarbons.

Description

Technical field [0001] The invention relates to a method for preparing aromatic hydrocarbons by catalytic conversion of methanol. Background technique [0002] Aromatics (especially triphenyl, benzene, toluene, xylene, namely BTX) are important basic organic synthesis raw materials. Driven by the demand for downstream derivatives, the market demand for aromatics continues to grow. [0003] Catalytic reforming and steam cracking processes are the main production processes of aromatics, which belong to the petroleum route production technology. my country's coal resources are relatively abundant. With the successful development of high-efficiency, long-period methanol catalysts and large-scale methanol plant technology in recent years, the production cost of coal-based methanol has been greatly reduced, which provides a cheap source of raw materials for the production of methanol downstream products (olefins, aromatics, etc.). Therefore, consider using methanol as a raw material t...

Claims

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Application Information

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IPC IPC(8): C07C1/20C07C15/04C07C15/06C07C15/08
CPCC07C1/20C07C2529/40C07C2529/44C07C15/04C07C15/06C07C15/08Y02P20/584
Inventor 李晓红齐国祯金永明王艳学
Owner CHINA PETROLEUM & CHEM CORP
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