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Production increasing method for propylene

A propylene and product technology, applied in ethylene production, bulk chemical production, hydrocarbon production from oxygen-containing organic compounds, etc., can solve the problems of low propylene yield and low selectivity, achieve uniform radial distribution and reduce secondary Reactive, uniform effect of radial concentration distribution

Active Publication Date: 2008-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that there are low yield and low selectivity of the target product propylene in the prior literature and technology, and a new method for increasing the production of propylene is provided

Method used

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  • Production increasing method for propylene

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Experimental program
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Effect test

Embodiment 1

[0018] The reaction is carried out in a gas-solid co-current downward fluidized bed reactor, the feed is methanol, the catalyst is SAPO-34, the temperature of reactor A is 470℃, the pressure is 0.1MPa, the residence time is 5 seconds, and the ratio of catalyst to raw material is 4. The C4 and above components in the reaction product of reactor A enter reactor B, where the temperature of reactor B is 510℃, the pressure is 0.1MPa, the residence time is 8 seconds, the weight ratio of catalyst to hydrocarbon is 5, and the regenerator temperature It is 530°C. The methanol conversion rate is 99.8%. In the hydrocarbon products, the proportion of ethylene is 52% and the proportion of propylene is 31%.

Embodiment 2

[0020] The reaction is carried out in a gas-solid co-current downward fluidized bed reactor, the feed is methanol, the catalyst is SAPO-34, the temperature of reactor A is 450℃, the pressure is 0.02MPa, the residence time is 3 seconds, and the ratio of catalyst to raw material is 5. The C4 and above components in the reaction product of reactor A enter reactor B, where the temperature of reactor B is 560℃, the pressure is 0.2MPa, the residence time is 5 seconds, the weight ratio of catalyst to hydrocarbon is 1, the regenerator The temperature is 580°C. The methanol conversion rate is 100%. In the hydrocarbon products, the proportion of ethylene is 49%, and the proportion of propylene is 36%.

Embodiment 3

[0022]The reaction is carried out in a gas-solid co-current downward fluidized bed reactor, the feed is dimethyl ether, the catalyst is SAPO-34, the temperature of reactor A is 560℃, the pressure is 0.5MPa, the residence time is 15 seconds, the catalyst and raw materials The ratio is 26. The C4 and above components in the reaction product of reactor A enter reactor B, where the temperature of reactor B is 620°C, the pressure is 0.4MPa, the residence time is 20 seconds, and the weight ratio of catalyst to hydrocarbon is 0.6. The regenerator temperature is 550°C. The conversion rate of dimethyl ether is 100%. In the hydrocarbon products, the proportion of ethylene is 47%, and the proportion of propylene is 28%.

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Abstract

The present invention relates to one kind of propylene producing process with high propylene selectivity and high propylene yield. The production process includes the following steps: 1. reaction of oxygen compound material in reactor A through contacting with catalyst I to produce effluent I containing ethylene, propylene and C4 and C4+ hydrocarbons; and separating the effluent I in a separating unit to obtain C4 and C4+ effluent II, ethylene product and propylene product; 2. reaction of the effluent II in reactor B through contacting with catalyst II to produce effluent III containing ethylene, propylene and C4 and C4+ hydrocarbons; and separating the effluent III in a separating unit to obtain C4 and C4+ effluent IV, ethylene product and propylene product; and 3. returning the effluent III to reactor B. The production process may be applied in industrial production.

Description

Technical field [0001] The invention relates to a method for increasing the production of propylene, in particular to a method for increasing the production of propylene by adopting a downward fluidized bed to catalytically react methanol or dimethyl ether and compound butene catalytic cracking technology. Background technique [0002] Petrochemical industry is an important pillar industry in the national economy. It provides a large amount of chemical raw materials for industry, agriculture, transportation, and national defense. It is one of the industries with a strong connection and driving force in the national economy. Propylene and ethylene are the two most important basic raw materials for modern petrochemical industry. [0003] Propylene is mainly used to produce polypropylene, cumene, carbonyl alcohol, acrylonitrile, propylene oxide, acrylic acid, isopropanol, etc. Among them, polypropylene accounts for more than half of the world's propylene demand. At present, 67% of t...

Claims

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Application Information

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IPC IPC(8): C07C1/20C07C11/04C07C11/06
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 刘俊涛钟思青齐国祯王华文
Owner CHINA PETROLEUM & CHEM CORP