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Separation method for methanol-to-propylene (MTP) reaction product

A reaction product, methanol conversion technology, applied in chemical instruments and methods, distillation purification/separation, hydrocarbon purification/separation, etc., can solve the problems of propylene recovery rate, high energy consumption, complicated separation process, etc., and achieve significant energy saving , The effect of improving the recovery rate

Active Publication Date: 2017-01-11
SINOPEC GUANGZHOU ENG +1
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Problems solved by technology

[0008] In order to solve the current problems such as complex separation process of MTP reaction products, high energy consumption, and affected propylene recovery rate, the present invention provides a separation method for reaction products of methanol conversion to propylene

Method used

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  • Separation method for methanol-to-propylene (MTP) reaction product

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Embodiment Construction

[0029] Such as figure 1 As shown, the MTP reaction product 1 enters the reaction product separator 3 after being pretreated by the pretreatment system 2, and is separated into a gas phase product, a liquid phase product and process water in the reaction product separator 3, and the gas phase product is sent to the compression unit for compression. The first stage 7 of the machine is compressed to 0.15-0.25MPa (g), the temperature is 60-70°C, and it enters the first-stage outlet cooler 8 to cool to 38-42°C, and the gas-liquid separation is carried out in the primary liquid separation tank 9 to obtain the primary gas phase product and the primary condensate. Liquid, the primary gas phase product is compressed to 0.5-0.80MPa(g) by the second stage 10 of the compressor, the temperature is 80-95°C, it enters the second-stage outlet cooler 11 and is cooled to 38-42°C, and passes through the secondary liquid separation tank 12 gas liquid separation to obtain the secondary gas phase p...

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Abstract

The invention discloses a separation method for a methanol-to-propylene (MTP) reaction product. According to the method, gas-phase feedstock and liquid-phase feedstock, which are obtained through subjecting the MTP reaction product to pretreatment and reaction product separator separation, sequentially enter a debutanizer and a deethanizer for treatment, treatment is carried out by a debutanizer refluxing tank top fractionating column debutanization and deethanizer refluxing tank top fractionating column deethanization combined process, and then, polymerization-grade propylene is obtained. According to the method, the product quality and recovery rate of the propylene can be effectively guaranteed, meanwhile, the debutanizer and the deethanizer have no need of being operated at low temperatures, and a fractionating system is energy-saving remarkably.

Description

technical field [0001] The invention belongs to the field of coal chemical industry or natural gas chemical industry, and specifically relates to a method for separating reaction products of methanol conversion to propylene, which improves the recovery rate of propylene, reduces energy consumption, and simplifies the process. Background technique [0002] The shortage of petroleum resources will restrict the development of my country's petrochemical industry. The technology of converting methanol to olefins has opened up a new process route for the production of basic organic chemical raw materials from coal or natural gas, and realized an effective way to extend the development of coal chemical industry or natural gas chemical industry to petrochemical industry. . [0003] In the past ten years, licensors have developed the separation technology of methanol conversion to olefins, mainly focusing on the purification, compression and separation of methanol conversion to olefin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/00C07C7/04C07C11/06
Inventor 徐又春郭劲鹤孙秋荣李爱国杨旭东董海芳张钟岩曾菁冯好喆
Owner SINOPEC GUANGZHOU ENG
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