Device for recovery and refining of propylene

A propylene and recovery tower technology, applied in the purification/separation of hydrocarbons, hydrocarbons, chemical instruments and methods, etc., can solve the problem of high energy consumption, achieve the effect of improving purity, reducing energy consumption, and achieving good technical effects

Active Publication Date: 2016-02-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problem of high energy consumption in the prior art, and a new device for recovering and refining propylene is provided

Method used

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  • Device for recovery and refining of propylene

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, taking a 100,000-ton / year PO plant as an example, the raw materials containing α,α-dimethylbenzyl alcohol, cumene, propylene oxide, propylene and propane from the epoxidation reaction system are sent through pipeline 1 After separation, the propylene obtained from the side line of the tower is divided into two parts. Most of the propylene is sent back to the epoxidation reaction system through pipeline 6 to participate in the reaction (the epoxidation reaction system is not shown in the figure), and a small part of propylene is passed through the pipeline 6. The pipeline 5 enters the depropanizer II for refining, and the heavy components obtained in the tower kettle are sent to the adiabatic flash tank III through the pipeline 3 for separation. The gas phase product obtained from the top of the flash tank III is sent to the middle part of the low-pressure propylene recovery tower IV through the pipeline 9, and the liquid phase product obtained...

Embodiment 2

[0040] With [embodiment 1], just raw material and operating condition change.

[0041] In the raw material, by weight percent, the content of α,α-dimethylbenzyl alcohol is 26%, the content of cumene is 21.5%, the content of propylene oxide is 10.5%, the content of propylene is 39%, the content of propane The content is 2%.

[0042] The operating conditions of the high-pressure propylene recovery tower are as follows: the operating pressure is 1.8MPa in gauge pressure, the operating temperature at the top of the tower is 45°C, the operating temperature at the bottom of the tower is 124°C, and the number of theoretical plates is 25.

[0043] The operating conditions of the low-pressure propylene recovery tower are as follows: the operating pressure is 0.2MPa in gauge pressure, the operating temperature at the top of the tower is 30°C, the operating temperature at the bottom of the tower is 119°C, and the number of theoretical plates is 20.

[0044] The operating conditions of t...

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Abstract

The invention relates to a device for recovery and refining of propylene, and mainly solves the technical problem of high energy consumption in the prior art. The invention solves the problems by using a propylene recovery device containing a high-pressure propylene recovery tower, a flash tank, a low-pressure propylene recovery tower and a depropanization tower, and can be used in industrial production of propylene recovery using a propylene epoxide plant.

Description

technical field [0001] The invention relates to a device for recovering and refining propylene, in particular to a device for recovering propylene from a propylene epoxidation reaction product. Background technique [0002] Propylene oxide (PO) is a very important organic chemical raw material. It is the third largest organic chemical product in the output of propylene derivatives after polypropylene and acrylonitrile. It is mainly used in the production of polyether, propylene glycol, isopropanolamine, Non-polyether polyols, etc., and then produce unsaturated polyester resins, polyurethanes, surfactants, flame retardants, etc., which are widely used in chemical industry, light industry, medicine, food, textile and other industries, and have great significance for the development of chemical industry and national economy. profound influence. With the expansion of the use of propylene oxide and the growth of the amount of downstream products, the market demand for propylene ...

Claims

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Application Information

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IPC IPC(8): C07C11/06C07C7/04C07C7/00
Inventor 李木金杨卫胜施德何志
Owner CHINA PETROLEUM & CHEM CORP
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