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Coaxial segmented fluidized bed reactor for converting methanol and/or dimethyl ether to ethylene, propylene and aromatics and its reaction method

A fluidized bed reaction, dimethyl ether technology, applied in chemical instruments and methods, hydrocarbon production from oxygen-containing organic compounds, ethylene production, etc., can solve problems such as low yields of ethylene, propylene and aromatic hydrocarbons, and reduce the influence of diffusion. , the effect of expanding the airspeed adjustment range and promoting contact

Active Publication Date: 2017-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The problems of low yields of ethylene, propylene and aromatics all exist in the above-mentioned patented technologies

Method used

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  • Coaxial segmented fluidized bed reactor for converting methanol and/or dimethyl ether to ethylene, propylene and aromatics and its reaction method
  • Coaxial segmented fluidized bed reactor for converting methanol and/or dimethyl ether to ethylene, propylene and aromatics and its reaction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] use as figure 1 device shown.

[0053] The diameter of the first reaction section of the reactor is 2 meters, and the height accounts for 30% of the total height of the reactor; the ratio of the diameter of the second reaction section to the diameter of the first reaction section is 1.2:1, and its height accounts for 55% of the total height of the reactor. %; The ratio of the diameter of the dilute phase section to the diameter of the second reaction section is 1.8:1, and its height accounts for 10% of the total height of the reactor. The height of the first transition section accounts for 3% of the total height of the reactor, and the height of the second transition section accounts for 2% of the total height of the reactor. A heat extractor is arranged outside the reactor, and the height of the heat extractor accounts for 30% of the height of the reactor. A heat extractor is arranged outside the regenerator, and the height of the heat extractor accounts for 80% of t...

Embodiment 2

[0060] use as figure 1 device shown.

[0061] The diameter of the first reaction section of the reactor is 1.5 meters, and the height accounts for 5% of the total height of the reactor; the ratio of the diameter of the second reaction section to the diameter of the first reaction section is 1.8:1, and its height accounts for 70% of the total height of the reactor. %; The ratio of the diameter of the dilute phase section to the diameter of the second reaction section is 2.5:1, and its height accounts for 20% of the total height of the reactor. The height of the first transition section accounts for 2% of the total height of the reactor, and the height of the second transition section accounts for 3% of the total height of the reactor. A heat extractor is arranged outside the reactor, and the height of the heat extractor accounts for 95% of the height of the reactor. A heat extractor is arranged outside the regenerator, and the height of the heat extractor accounts for 30% of ...

Embodiment 3

[0068] The device of Example 1 was used.

[0069] The reaction conditions of the reactor are: the temperature is 550°C, the reaction pressure in gauge pressure is 0 MPa, the weight space velocity of methanol is 10 (gram / hour) / gram catalyst, the mass ratio of catalyst circulation amount and methanol feed amount It is 40:1, and the average superficial gas velocity is 1 m / s. The temperature of the regenerator was 580°C. The content of char on the regenerated catalyst is 0.09% by weight based on the mass percentage of the catalyst.

[0070] The stripping medium is water vapor. The lifting medium is N 2 . The regeneration medium is air and O 2 mixture with a volume ratio of 8:2.

[0071] Using methanol as a raw material, the water content is 10% by weight. The mass ratio of propane: C4 and C5 and C6 non-aromatic in the circulating material is 2:8. The feed mass ratio of methanol and recycle material is 10:1.

[0072] A Ga-β catalyst is used.

[0073] The preparation steps...

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Abstract

The invention relates to a coaxial type fluidized bed reaction device for preparing ethylene, propylene and aromatic hydrocarbon by converting methyl alcohol and / or dimethyl ether, and a reaction method of the reaction device and mainly aims at solving the problem that the yield of the ethylene, the propylene and the aromatic hydrocarbon is low. The coaxial type fluidized bed reaction device for preparing the ethylene, the propylene and the aromatic hydrocarbon by converting the methyl alcohol and / or dimethyl ether adopts a system comprising a reactor (1), a regenerator (2) and a stripper (3); raw materials (15) and circulating materials (24) enter the reactor (1) from the lower part of a first reaction section (25) of the reactor and the lower part of a second reaction section (27) of the reactor respectively to be contacted with a catalyst for carrying out reaction, a carbon deposited catalyst obtained after the reaction flows downward and enters a to-be-regenerated inclined tube (7) connected with the bottom of the reactor (1) and then is lifted to the stripper (3) by virtue of a steam stripping vertical pipe (8), a stripped catalyst enters the regenerator (2) to be regenerated, the regenerated catalyst is subjected to degassing by virtue of a degassing tank (4), and the degassed catalyst flows downward and enters the first reaction section (25) of the reactor. By adopting the technical scheme, the problem is relatively well solved, and the coaxial type fluidized bed reaction device and the reaction method provided by the invention can be applied to industrial production of the ethylene, the propylene and the aromatic hydrocarbon.

Description

technical field [0001] The invention relates to a coaxial segmented fluidized bed reaction device and a reaction method for converting methanol and / or dimethyl ether to produce ethylene, propylene and aromatics. Background technique [0002] Ethylene, propylene and aromatics (especially triphenyl, Benzene, Toluene, Xylene, or BTX) are important basic raw materials for organic synthesis. Driven by the demand for downstream derivatives, the market demand for ethylene, propylene and aromatics continues to grow. [0003] The steam cracking process using liquid hydrocarbons (such as naphtha, diesel, secondary processed oil) as raw material is the main production process of ethylene, propylene and aromatics. This process belongs to the production technology of petroleum route. In recent years, due to the limited supply and high price of petroleum resources, the cost of raw materials has been increasing. Due to these factors, the technology of producing ethylene, propylene and ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/26C07C1/20C07C11/04C07C11/06C07C15/02
CPCB01J8/26B01J2208/00548C07C1/20C07C2529/08C07C2529/40C07C2529/44C07C2529/46C07C2529/48C07C2529/70C07C2529/80C07C11/04C07C11/06C07C15/02Y02P20/584Y02P30/20Y02P30/40
Inventor 顾松园钟思青李晓红金永明
Owner CHINA PETROLEUM & CHEM CORP
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