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Multifunctional methanol and/or dimethyl ether conversion system and method for producing ethylene, propylene and aromatics

A dimethyl ether, multi-functional technology, applied in the direction of hydrocarbon production from oxygen-containing organic compounds, ethylene production, organic chemistry, etc., can solve the problems of low yield, flexible adjustment of product structure, etc., to achieve high yield and maximum economic benefit The effect of optimizing and saving investment

Active Publication Date: 2016-08-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] One of the technical problems to be solved by the present invention is the low yield of ethylene, propylene and aromatics in the prior art, and the problem that the product structure cannot be flexibly adjusted according to market demand. It provides a multifunctional methanol and / or dimethyl ether conversion system to produce ethylene, Propylene and Aromatic Systems

Method used

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  • Multifunctional methanol and/or dimethyl ether conversion system and method for producing ethylene, propylene and aromatics
  • Multifunctional methanol and/or dimethyl ether conversion system and method for producing ethylene, propylene and aromatics
  • Multifunctional methanol and/or dimethyl ether conversion system and method for producing ethylene, propylene and aromatics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Both the ethylene and propylene reactors and the aromatization reactor use methanol as raw material, and the feed weight ratio is 10:90.

[0047] The ethylene and propylene reactors and the aromatization reactor are circulating fluidized bed reactors. The operation steps of the device include: (1) The raw material enters the reactor, contacts and reacts with the regenerated catalyst to generate a product containing low-carbon olefins, and carries the ungenerated catalyst through the gas-solid rapid separator into the settler; (2) The cyclone separator Most of the separated catalyst enters the settler, while the gas phase product and part of the catalyst not separated by the cyclone separator enter the next stage cyclone separator for further separation; (3) the gas phase product enters the subsequent separation part through the outlet pipeline; (4 ) After being stripped by the stripping section, the catalyst to be produced in the settler enters the regenerator to burn c...

Embodiment 2

[0053] use figure 1 and image 3 Shown flow process, and the device of embodiment 1. Both the ethylene and propylene reactors and the aromatization reactor use methanol as raw material, and the feed weight ratio is 80:20. The mass ratio of the ethane 23 that returns to the aromatization reactor and the ethane 21 of the output system is 5:5, the mass ratio of the propane 24 that returns the aromatization reactor and the propane 22 of the output system is 7:3, and the return to the aromatization reactor is 7:3. The mass ratio of C4, C5 and C6 non-aromatic 27 in the texturization reactor to C4, C5 and C6 non-aromatic 26 in the output system is 5:5, and the C5 and The mass ratio of C6 non-aromatic 30 and C5 and C6 non-aromatic 29 separated from the middle part of the separation tower II of the output system is 1:9.

[0054] The preparation steps of SAPO-34-a catalyst: Mechanically mix SAPO-34 molecular sieve, carrier and binder, add appropriate amount of water and HCl, control ...

Embodiment 3

[0058] use figure 1 and Figure 4 Shown flow process, and the device of embodiment 1 and SAPO-34-a catalyst. Both the ethylene and propylene reactors and the aromatization reactor use dimethyl ether as the raw material, and the feed weight ratio is 40:60. The mass ratio of the ethane 23 that returns to the aromatization reactor and the ethane 21 of the output system is 9:1, the mass ratio of the propane 24 that returns the aromatization reactor and the propane 22 of the output system is 1:9, and the return to the aromatization reactor is 1:9. The mass ratio of the C4, C5 and C6 non-aromatic 27 of the texturization reactor to the C4 and C5 and C6 non-aromatic 26 of the output system is 7:3, and the C5 and the separated C5 and The mass ratio of C6 non-aromatic 30 and C5 and C6 non-aromatic 29 separated from the middle part of the separation tower II of the output system is 9.5:0.5.

[0059] The preparation steps of Ga-β catalyst: mechanically mix β molecular sieve, carrier an...

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Abstract

The invention relates to a multifunctional system and method for preparing ethylene, propylene and aromatic hydrocarbons by converting methanol and / or dimethyl ether, and mainly solves problems of low yield of ethylene, propylene and aromatic hydrocarbons and low flexibility of product structure according to market demands. The system comprises an ethylene / propylene reactor (1), an aromatization reactor (2), a quenching tower I (3), a separating tower I (4), a quenching tower II (5), a separating tower II (6) and a separating unit (9). The method comprises the following steps: the product generated by the ethylene / propylene reactor (1) sequentially enters the quenching tower I (3) and the separating tower I (4); the product generated by the aromatization reactor (1) sequentially enters the quenching tower II (5) and separating tower II (6); the gaseous product obtained by the separating tower I (4) and separating tower II (6) enters the separating unit (9) via a compressor (7); and part of C5 and C6 (30) non-aromatics obtained by the separating tower II (6) and separating unit (9), ethane (23), propane (24) and C4 and C5 and C6 non-aromatics (27) are returned to the aromatization reactor as circulating materials. The technical scheme well solves the problems, and can be used in industrial production of ethylene, propylene and aromatic hydrocarbons.

Description

technical field [0001] The invention relates to a system and method for converting multifunctional methanol and / or dimethyl ether to produce ethylene, propylene and aromatic hydrocarbons. 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] At present, ethylene, propylene and aromatics mainly come from steam thermal cracking process, fluid catalytic cracking process and catalytic reforming process of petroleum route. However, due to the limited supply of petroleum resources and high prices, the cost of producing ethylene and propylene via petroleum routes continues to increase. Due to these factors, in recent years, coal-based and natural gas-based methanol conversion technologies (MTO, MTP, MTA) for the production of e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/20C07C11/06C07C11/04C07C15/04C07C15/06C07C15/08
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 钟思青李晓红齐国祯王洪涛
Owner CHINA PETROLEUM & CHEM CORP