Methanol-to-olefin reaction apparatus and application thereof

A methanol-to-olefin and reaction device technology, which is applied in the direction of producing hydrocarbons from oxygen-containing organic compounds, organic chemistry, etc., can solve the problem of low utilization rate of chilled liquid-phase vaporization space, high content of oxygen-containing compounds, and unstable propylene yield and other problems, to achieve the effect of being beneficial to environmental protection, reducing the content of oxygenated compounds, and reducing equipment investment

Active Publication Date: 2014-10-22
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is that the quenching liquid phase nozzle equipment in the MTP multi-stage fixed bed technology in the existing technology has high requirements and is easy to block, the interaction between the reaction temperature of the fixed bed reactor and the reaction space velocity, and the propylene yield Unstable, too high content of oxygen-containing compounds, low utilization rate of interstage chilled liquid-phase vaporization space, providing a new reaction device for methanol to propylene

Method used

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  • Methanol-to-olefin reaction apparatus and application thereof
  • Methanol-to-olefin reaction apparatus and application thereof
  • Methanol-to-olefin reaction apparatus and application thereof

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Embodiment 1

[0031] according to figure 2 As shown, the reaction uses ZSM-5 zeolite catalyst, the reaction temperature is 470°C, the reaction pressure is 0.06MPag, the temperature of stream 16 is 156°C, and the mass flow rate of each component is: methanol 9724 kg / h, dimethyl ether 29266 kg / h , water 28200 kg / h, temperature of stream 17 is 469°C, mass flow rate of each component is: methanol 1819 kg / h, dimethyl ether 3721 kg / h, water 25841 kg / h, hydrocarbon 56753 kg / h, reaction pressure 0.1 MPa(g). Stream 33 is sent to each stage separately without cooling or heating of the stream. The reactor can generate 450KW medium-pressure steam through the internal heat exchanger to adjust the inlet temperature of the fixed-bed catalyst in each section. Compared with [Comparative Example 1], after switching 16000 kg / h water from high-temperature stream 32 to chilled stream 33, the heating load of stream 32 can be reduced by 2828KW. Experimental studies have shown that due to the promotion of the ...

Embodiment 2

[0034] according to figure 2 As shown, the reaction uses ZSM-5 zeolite catalyst, the reaction temperature is 470°C, the reaction pressure is 0.06MPag, the temperature of stream 16 is 153°C, and the mass flow rate of each component is: methanol 9724 kg / h, dimethyl ether 29266 kg / h , water 28200 kg / h, temperature of stream 17 is 469°C, mass flow rate of each component is: methanol 1819 kg / h, dimethyl ether 3721 kg / h, water 25841 kg / h, hydrocarbon 56753 kg / h, reaction pressure 0.05 MPa(g). Stream 16 is sent to each stage separately without cooling or heating of the stream. The reactor can generate 343KW medium-pressure steam through the internal heat exchanger to adjust the inlet temperature of each fixed-bed catalyst. Compared with [Comparative Example 1], after switching 16000 kg / h water from high-temperature stream 32 to chilled stream 33, the heating load of stream 32 can be reduced by 2828KW. According to the above-mentioned reaction temperature, reaction pressure, conde...

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Abstract

The invention relates to a methanol-to-olefin reaction apparatus and an application thereof. The technical problems of high requirements and easy obstruction of chilled liquid phase nozzle equipment of a methanol-to-olefin multistage fixed bed reactor, mutual influences of the reaction temperature and the reaction air speed of the fixed bed reactor and low utilization rate of an intersegmental chilled liquid phase vaporization space existing in the prior art are mainly solved. The methanol-to-olefin reaction apparatus mainly comprises catalyst bed layers (16-21), distributors (27-31) and filler layers (22-26); and the top layer in the apparatus is the catalyst bed layer (16), the lower portion of the catalyst bed layer (16)is the distributor (27), the lower portion of the distributor (27)is the filler layer (22), the lower portion of the filler layer (22) is the catalyst bed layer (17), the bottom layer in the apparatus is the catalyst bed layer (21) in a same arrangement mode, a feed inlet is arranged between two adjacent bed layers, and the distributors are distributor pipe bustle pipe structures. The apparatus well solves the problems, and can be used in the industrial production of methanol-to-olefin.

Description

technical field [0001] The invention relates to a methanol-to-olefin reaction device and its application. Background technique [0002] Propylene is one of the basic raw materials of modern organic chemical industry. Due to the increasing demand for propylene derivatives such as polypropylene, acrylonitrile, cumene, and propylene oxide, the demand for propylene is also growing rapidly. At present, ethylene and propylene are mainly obtained through the process route using petroleum as raw material, while propylene mainly comes from the by-product of petroleum steam cracking process and catalytic cracking process. Since propylene is mainly obtained as a by-product, the output of propylene products is often limited by the output of the main product of its process. Since the demand for propylene has been higher than that of ethylene in recent years, in order to produce or increase the production of propylene, researchers have developed a variety of process routes such as metha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/06C07C1/20
Inventor 胡帅
Owner CHINA PETROLEUM & CHEM CORP
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