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Method for adding catalyst to methanol-to-olefins reaction-regeneration system

A methanol-to-olefin and regeneration system technology is applied in ethylene production, hydrocarbon production from oxygen-containing organic compounds, and organic chemistry. Effect

Active Publication Date: 2011-12-14
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 problem of more catalyst loss caused by the addition of catalyst in the prior art, and a new method for adding catalyst to the methanol-to-olefins reaction-regeneration system is provided

Method used

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  • Method for adding catalyst to methanol-to-olefins reaction-regeneration system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In the methanol-to-olefins fast fluidized bed reaction-regeneration unit, the regeneration system type is as follows figure 1 shown. The feed rate of methanol is 4.2 tons / hour, the catalyst is SAPO-34, the regeneration zone is a fast fluidized bed, the gas phase linear velocity in the regeneration zone is 1.2 m / s, the regeneration temperature is 675°C, and the regeneration pressure is measured by gauge pressure. 0.1MPa. The carbon deposition amount of the raw catalyst is 4.6%. After entering the regeneration zone, it contacts with air, and oxidation reaction occurs to generate flue gas and form a regenerated catalyst. The carbon deposition amount of the regenerated catalyst is 0.4%. After being degassed by air, a part of it is returned to the reactor , part of it enters the external heat extractor, and the fluidized medium of the external heat extractor is air. When the total amount of catalyst in the reaction-regeneration system is lower than 80% of the design value,...

Embodiment 2

[0020] According to the conditions stated in Example 1, the regeneration temperature is 635° C., and the carbon deposition amount of the regenerated catalyst is 1.5%. The degassing medium and the fluidized medium of the external heat extractor are both nitrogen, and the additional catalyst is transported with nitrogen, and the additional catalyst is Catalyst fine powder and fresh catalyst recovered by the external triple rotation of the regenerator, the fresh catalyst accounts for 60%, the temperature of the additional catalyst is about 57°C, and it is transported to the external heat extractor through nitrogen, and the temperature inside the external heat extractor is about 452°C . A heat extraction coil is installed inside the external heat extractor to exchange heat with the cooling water. There is a catalyst outlet at the lower part of the external heat extractor, which is connected to the bottom of the regeneration zone. The temperature of the mixed catalyst coming out of...

Embodiment 3

[0022] According to the conditions mentioned in Example 1, the catalyzer adopts ZSM-5, the carbon deposition amount of the standby catalyst is 1.8%, the regeneration temperature is 650°C, the carbon deposition amount of the regenerated catalyst is 0.24%, and the temperature of the added catalyst is about 45°C. The air is delivered to the external heat extractor, and the temperature inside the external heat extractor is about 469°C. A heat extraction coil is installed inside the external heat extractor to exchange heat with the cooling water. There is a catalyst outlet at the lower part of the external heat extractor, which is connected to the bottom of the regeneration zone. The temperature of the mixed catalyst coming out of the external heat extractor is about 451°C and enters the regeneration zone. According to calculation, the unit consumption of catalyst during the catalyst addition period is: 0.77 kg / ton.

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Abstract

The invention relates to a method for supplementing a catalyst into a methanol-to-olefin reaction and regeneration system, mainly solving the problem of catalyst losses generated when the catalyst is supplemented in the prior art. In the technical scheme adopted in the invention, the method for supplementing the catalyst into the methanol-to-olefin reaction and regeneration system mainly comprises the following steps: a catalyst regeneration device is provided and mainly comprises a regeneration area, a settlement area, an external heater and a catalyst conveying pipeline; and (2) when the catalyst needs to be supplemented to the reaction-regeneration system, the catalyst to be supplemented is supplemented to the external heater of the regeneration device, accordingly, the problem is favorably solved. The method can be used in low-carbon olefin industrial production.

Description

technical field [0001] The invention relates to a method for adding catalyst to a methanol-to-olefins reaction-regeneration system. technical background [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 compounds can be converted from co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C11/04C07C11/06
CPCY02P20/584Y02P30/20Y02P30/40
Inventor 齐国祯钟思青王莉王洪涛
Owner CHINA PETROLEUM & CHEM CORP