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A reaction device for increasing the yield of ethylene and propylene in the reaction process of methanol to olefins

A methanol-to-olefins and reaction process technology, applied in ethylene production, hydrocarbon production from oxygen-containing organic compounds, bulk chemical production, etc., can solve the problems of low yields of ethylene and propylene

Active Publication Date: 2015-09-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the low yield of ethylene and propylene in the prior art, and a new reaction device for increasing the yield of ethylene and propylene in the methanol-to-olefins reaction process is provided

Method used

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  • A reaction device for increasing the yield of ethylene and propylene in the reaction process of methanol to olefins
  • A reaction device for increasing the yield of ethylene and propylene in the reaction process of methanol to olefins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] in such as figure 1In the fluidized bed reaction device shown, 50% of the methanol raw material with a purity of 99.5% enters the outer ring reaction zone by mass, and 50% enters the middle ring reaction zone, and contacts with the catalyst of SAPO-34 molecular sieve. The resulting product stream is settling After the gas-solid separation in the zone, it enters the separation section to separate low-carbon olefin products, hydrocarbons with carbon four or more, and oxygen-containing compound streams. The catalyst separated in the settling zone is 20% by mass to be regenerated, and 80% is returned to the outer ring reaction zone. The regenerated catalyst enters the inner ring reaction zone and contacts with the C4 or higher hydrocarbon stream, and the generated product stream enters the middle ring reaction zone, and the oxygen-containing compound stream also enters the middle ring reaction zone. The diameter ratio of the outer ring reaction zone, the middle ring reactio...

Embodiment 2

[0023] According to the conditions and steps described in Example 1, 99% of the methanol raw material with a purity of 99.5% enters the outer ring reaction zone by mass, 1% enters the middle ring reaction zone, and 60% of the catalyst separated in the settling zone is regenerated by mass , 40% returns to the outer ring reaction zone, and the outlet of the inner ring reaction zone is 2 / 3 of the height of the middle ring reaction zone from the bottom of the middle ring reaction zone. The diameter ratio of the outer ring reaction zone, middle ring reaction zone and inner ring reaction zone is 8:3:1. The reaction conditions in the outer ring reaction zone are: the reaction pressure is 0.01MPa in gauge pressure, the average temperature is 500°C, the average carbon deposition amount of the catalyst is 3.5% by weight, and the gas phase velocity is 5.0 m / s; The reaction conditions are: the reaction pressure is 0.01MPa in gauge pressure, the average temperature is 500°C, and the gas ph...

Embodiment 3

[0025] According to the conditions and steps described in Example 1, 85% of the methanol feedstock with a purity of 99.5% enters the outer ring reaction zone by mass, 15% enters the middle ring reaction zone, and 70% of the catalyst separated in the settling zone is regenerated by mass , 30% return to the outer ring reaction zone, the outlet of the inner ring reaction zone is 1 / 2 the height of the middle ring reaction zone from the bottom of the middle ring reaction zone. The diameter ratio of the outer ring reaction zone, middle ring reaction zone and inner ring reaction zone is 4:2:1. The reaction conditions in the outer ring reaction zone are: the reaction pressure is 0.01MPa in gauge pressure, the average temperature is 480°C, the average carbon deposition amount of the catalyst is 3.0% by weight, and the gas phase velocity is 2.0 m / s; The reaction conditions are: the reaction pressure is 0.01MPa in gauge pressure, the average temperature is 500°C, and the gas phase veloci...

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Abstract

The invention relates to a reaction device used for increasing the yields of ethylene and propylene in a process of preparing olefins from methanol, mainly solving a problem of the low yields of the ethylene and the propylene in the prior art. According to the technical scheme adopted by the reaction device, the reaction device mainly comprises an outer-ring reaction zone 8, a middle-ring reaction zone 6 and an inner-ring reaction zone 2, the upper part of the outer-ring reaction zone 8 is connected to a sedimentation zone 10, the lower part of the outer-ring reaction zone 8 is connected to external circulating pipes 13, the middle-ring reaction zone 6 is located in the outer-ring reaction zone 8, the side wall of the middle-ring reaction zone 6 is provided with catalyst flow openings 5, the outlet of the inner-ring reaction zone 2 is located in the middle-ring reaction zone 6, the distance between the outlet of the inner-ring reaction zone 2 and the bottom of the middle-ring reaction zone 6 is one fifth to two thirds of the height of the middle-ring reaction zone 6, the inlet of the inner-ring reaction zone 2 is located outside the outer-ring reaction zone 8, the lower part of the inner-ring reaction zone 2 is connected to a regeneration inclined tube 7, and the lower part of the sedimentation zone 10 is provided with catalyst outlets which are respectively connected to a spent-catalyst inclined pipe 9 and the external circulating pipes 13. By adoption of the technical scheme, the problem is solved well and the reaction device can be used in industrial production of the ethylene and the propylene.

Description

technical field [0001] The invention relates to a reaction device for increasing the yield of ethylene and propylene in the process of methanol-to-olefin reaction. Background technique [0002] Low-carbon olefins, namely ethylene and propylene, are two important basic chemical raw materials, and their demand is increasing. Generally, ethylene and propylene are produced through petroleum routes, but due to the limited supply and high price of petroleum resources, the cost of producing ethylene and propylene from petroleum resources continues to increase. In recent years, people have begun to vigorously develop the technology of converting alternative raw materials into ethylene and propylene. Among them, an important class of alternative raw materials for the production of low-carbon olefins is oxygenated compounds, such as alcohols (methanol, ethanol), ethers (dimethyl ether, methyl ethyl ether), esters (dimethyl carbonate, methyl formate Esters), etc., these oxygenated co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/04C07C11/06C07C1/20
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 齐国祯金永明俞志楠
Owner CHINA PETROLEUM & CHEM CORP