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Method for producing arene and low-carbon alkene from 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 such as hydrothermal deactivation of catalysts, reduction of aromatics yield, and impact on continuous and stable operation of the device

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

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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. A method for producing aromatics from methanol or dimethyl ether is provided. and lower olefins

Method used

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  • Method for producing arene and low-carbon alkene from methanol or dimethyl ether

Examples

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Embodiment 1

[0039] 1.8 million tons / year methanol production of aromatics and light olefins adopts such as figure 1 In the circulating fluidized bed reaction-regeneration system shown, the fluidized bed reactor is equipped with an internal heat collector, and a metal catalyst 1%Zn / 3%Ag / ZSM-5 is used. The reaction process conditions of the fluidized bed reactor are: the reaction temperature is 470°C, the reaction pressure is 0.2MPa, and the average density of the catalyst in the dense phase zone is 350 kg / m 3 , the average superficial velocity 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 fast bed temperature is 680°C, the fast bed pressure is 0.21 MPa, the average density of the fast bed catalyst is 80 kg / m, and the average s...

Embodiment 2

[0042] 1.8 million tons / year methanol production of aromatics and light olefins adopts such as figure 1 In the circulating fluidized bed reaction-regeneration system shown, the fluidized bed reactor is equipped with an internal heat collector, and a metal catalyst 1%Zn / 3%Ag / ZSM-5 is used. The reaction process conditions of the fluidized bed reactor are: the reaction temperature is 450°C, the reaction pressure is 0.3MPa, and the average density of the catalyst in the dense phase zone is 300 kg / m 3 , the average superficial velocity is 0.6 m / s. The regeneration process conditions of the fluidized bed regenerator are as follows: the secondary temperature is 540°C, the secondary pressure is 0.3MPa, and the average density of the catalyst in the secondary dense phase zone is 400 kg / m 3 , the average superficial linear velocity is 0.5 m / s; the fast bed temperature is 680°C, the fast bed pressure is 0.31 MPa, the average density of the fast bed catalyst is 50 kg / m, and the average s...

Embodiment 3

[0045] 1.2 million tons / year methanol production of aromatics and low-carbon 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%Ag / 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, and the average density of the catalyst in the dense phase zone is 380 kg / m 3 , the average superficial velocity 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 again; the fast bed temperature is 690°C, the fast bed pressure is 0.31MPa, the average density of the fast bed catalyst is 100 kg / m, and t...

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Abstract

The invention relates to a method for producing an arene and a low-carbon alkene from methanol or dimethyl ether, and mainly solves problems that in a production process, temperatures of regeneratorsare relatively high, thus hydrothermal deactivation is gradually performed on a catalyst, an arene yield is reduced, and accordingly continuous and stable operation of a device is influenced. According to the invention, through the following technical scheme: a circulating fluidized bed reaction-regeneration system is adopted, and the methanol and / or the dimethyl ether is in contact with one or more silicon loaded metal catalysts through a fluidized bed reactor to generate the low-carbon alkene and an arene-enriched effluent; and a deactivated spent catalyst firstly passes through a first fluidized bed regenerator (8), and a relatively low temperature is controlled to mainly finish a hydrogen burning process, then an obtained catalyst enters a fast bed (16) and a second fluidized bed regenerator (15), and a relatively high temperature is controlled to finish carbon burning, the problems that in the process of producing the arene and the low-carbon alkene from the methanol or the dimethyl ether, hydrothermal deactivation is performed on the catalyst, and the continuous and stable operation is influenced are better solved, and the method can be used in industrial production of producing the arene and the low-carbon alkene from the methanol or the dimethyl ether.

Description

technical field [0001] The invention relates to a method for preparing aromatic hydrocarbons and light olefins from methanol or dimethyl ether. Specifically, it relates to a circulating fluidized bed reaction-regeneration system for preparing 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 difficult...

Claims

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Application Information

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IPC IPC(8): C07C1/20C07C11/04C07C11/06C07C15/04C07C15/06C07C15/08
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 钟思青李晓红齐国祯金永明
Owner CHINA PETROLEUM & CHEM CORP
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