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Method for producing aromatic hydrocarbons and light olefins by converting methanol or dimethyl ether

A low-carbon olefin and dimethyl ether technology, applied in the field of circulating fluidized bed reaction-regeneration system, can solve problems affecting the continuous and stable operation of the device, hydrothermal deactivation of the catalyst, and reduction in the yield of aromatics

Inactive Publication Date: 2018-01-05
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is that the temperature of the regenerator in the prior art is relatively high, so that the catalyst is gradually hydrothermally deactivated, the yield of aromatics is reduced, and the problem of affecting the continuous and stable operation of the device is provided. and lower olefins

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  • Method for producing aromatic hydrocarbons and light olefins by converting methanol or dimethyl ether
  • Method for producing aromatic hydrocarbons and light olefins by converting methanol or dimethyl ether

Examples

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Effect test

Embodiment 1

[0040] 1.8 million tons / year methanol production of aromatics and light olefins adopts such as figure 1 Shown is a circulating fluidized bed reaction-regeneration system. The fluidized bed reactor is equipped with an internal heat collector, and the metal catalyst 1%Zn / 3%La / ZSM-5 is used. The reaction process conditions of the fluidized bed reactor are as follows: the reaction temperature is 450°C, the reaction pressure is 0.3MPa, The average density of the catalyst in the dense phase zone is 300 kg / m 3 , the average empty tower line speed is 0.7 m / s. The regeneration process conditions of the fluidized bed regenerator are as follows: the secondary temperature is 550°C, the secondary pressure is 0.2MPa, and the average density of the catalyst in the secondary dense phase zone is 300 kg / m 3 , the average superficial linear velocity is 0.8 m / s; the secondary temperature is 680°C, the secondary pressure is 0.21MPa, and the average catalyst density in the secondary dense phase z...

Embodiment 2

[0043] 1.2 million tons / year methanol production of aromatics and low-carbon olefins adopts such as figure 1 Shown is a circulating fluidized bed reaction-regeneration system. The fluidized bed reactor is equipped with an internal heat collector, and the metal catalyst 1%Zn / 3%La / ZSM-5 is used. The reaction process conditions of the fluidized bed reactor are: the reaction temperature is 480°C, the reaction pressure is 0.3MPa, The average density of the catalyst in the dense phase zone is 380 kg / m 3 , the average empty tower line speed is 0.8 m / s. The regeneration process conditions of the fluidized bed regenerator are as follows: the secondary temperature is 530°C, the secondary pressure is 0.3MPa, and the average density of the catalyst in the secondary dense phase zone is 350 kg / m 3 , the average superficial linear velocity is 0.6 m / s; the secondary temperature is 690°C, the secondary pressure is 0.31 MPa, and the average catalyst density in the secondary dense phase zone i...

Embodiment 3

[0046] 1.8 million tons / year methanol production of aromatics and light olefins adopts such as figure 2 In the circulating fluidized bed reaction-regeneration system shown, the fluidized bed reactor is equipped with an external heat collector, and a metal catalyst 1%Zn / 3%La / ZSM-5 is used. Using Zn-Mg-ZSM-5 catalyst, the reaction process conditions of the fluidized bed reactor are as follows: the reaction temperature is 490 ° C, the reaction pressure is 0.2 MPa, and the average density of the catalyst in the dense phase zone is 430 kg / m 3 , the average superficial velocity is 0.9 m / s. The regeneration process conditions of the fluidized bed regenerator are as follows: the secondary temperature is 560°C, the secondary pressure is 0.2MPa, and the average density of the catalyst in the secondary dense phase zone is 250 kg / m 3 , the average superficial linear velocity is 0.8 m / s; the secondary temperature is 680°C, the secondary pressure is 0.21MPa, and the average catalyst densi...

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Abstract

The invention relates to a method for producing aromatic hydrocarbons and light olefins by converting methanol or dimethyl ether and mainly aims at solving the problems that a catalyst is gradually hydrothermally inactivated, the yield of aromatic hydrocarbons is reduced and the continuous and stable operation of a device is affected because the temperature of a regenerator is relatively high in aproduction process. The problems that the catalyst is hydrothermally inactivated and the continuous and stable operation is affected in the process of producing aromatic hydrocarbons and light olefins by using methanol or dimethyl ether are better solved by adopting the technical scheme that a circulating fluidized bed reaction-regeneration system with double strippers is adopted, methanol and / ordimethyl ether is in contact with one or more supported metal catalysts by a fluidized bed reactor to produce light olefins and an exudate rich in aromatic hydrocarbons. The method can be used for industrial production for producing aromatic hydrocarbons and light olefins by converting methanol or dimethyl ether.

Description

technical field [0001] The invention relates to a method for converting methanol or dimethyl ether to produce aromatics and light olefins. Specifically, it relates to a circulating fluidized bed reaction-regeneration system for producing aromatics and light olefins from methanol or dimethyl ether. Background technique [0002] Ethylene, propylene and aromatics (especially triphenyl, Benzene, Toluene, Xylene, or BTX) are important basic raw materials for organic synthesis. At present, they are mainly produced by petroleum routes. In recent years, the international crude oil price has been running at a high level, which has brought great cost pressure to the production technology of petroleum routes. [0003] For a long time, coal or natural gas to synthesis gas, synthesis gas to methanol and olefins, and aromatics separation technology have had large-scale mature experience, but the process from methanol to ethylene, propylene and aromatics is a breakpoint and difficulty in ...

Claims

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Application Information

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IPC IPC(8): C07C1/20C07C11/04C07C11/06C07C15/04C07C15/06C07C15/08
CPCY02P30/20Y02P30/40
Inventor 钟思青李晓红金永明齐国祯
Owner CHINA PETROLEUM & CHEM CORP
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