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MTP (methanol to propylene) method

A technology for producing propylene and methanol from methanol, which is applied in the directions of producing hydrocarbons from oxygen-containing organic compounds, organic chemistry, etc. Catalyst bed interval, low oxygenate yield, effect of reducing oxygenate content

Active Publication Date: 2013-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the reaction conditions in the previous MTP multi-stage fixed bed technology are not easy to control, resulting in unstable propylene yield and unguaranteed content of oxygenated compounds in the product. A new method for producing propylene from methanol is provided.

Method used

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  • MTP (methanol to propylene) method

Examples

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Embodiment 1

[0032] according to figure 2 As shown, the reaction adopts 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 9724kg / h, dimethyl ether 29266kg / h, water 28200kg / h, the temperature of stream 17 is 469°C, the mass flow rate of each component is: methanol 1819kg / h, dimethyl ether 3721kg / h, water 25841kg / h, hydrocarbon 56753kg / h, and the reaction pressure is 0.1MPa(g). Stream 16 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 16000kg / h water is switched from high temperature stream 17 to chilled stream 16, the heating load of stream 17 can be reduced by 2828KW. Experimental studies have shown that due to the promo...

Embodiment 2

[0034] according to figure 2 As shown, the reaction adopts 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 9724kg / h, dimethyl ether 29266kg / h, water 28200kg / h, the temperature of stream 17 is 469°C, the mass flow rate of each component is: methanol 1819kg / h, dimethyl ether 3721kg / h, water 25841kg / h, hydrocarbon 56753kg / h, and the reaction pressure is 0.05MPa(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 16000kg / h water is switched from high temperature stream 17 to chilled stream 16, the heating load of stream 17 can be reduced by 2828KW. According to the above reaction temperature, reaction pressure, con...

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Abstract

The invention relates to an MTP (methanol to propylene) method, which mainly solves the problems that the reaction condition of the existing MTP multi-section fixed bed technology cannot be easily controlled, the propylene yield is unstable, and the content of oxygen-containing compounds in the product cannot be ensured. According to the method, raw materials containing methanol are adopted as feeding and chilling materials, the feeding materials enter a reactor from the top of the multi-section fixed bed reactor to be in contact with catalysts filled in the reactor, and material flows containing propylene are generated through reaction, wherein chilling material distributors and inner heat taking devices are arranged between all catalyst bed layers and sections of the multi-section fixed bed reactor, and the chilling material flows enter positions among all catalyst bed layers and sections through the chilling material distributor. Through the technical scheme, the problems are perfectly solved, and the MTP method can be applied into the industrial production of the MTP.

Description

technical field [0001] The invention relates to a method for producing propylene from methanol, in particular to a method for producing propylene from methanol by using a multi-stage fixed-bed reactor. 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 t...

Claims

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Application Information

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IPC IPC(8): C07C11/06C07C1/20
Inventor 胡春何志胡帅李俊杰
Owner CHINA PETROLEUM & CHEM CORP
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