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Propylene recovery equipment

A propylene and recovery tower technology, applied in the fields of hydrocarbons, chemical instruments and methods, organic chemistry, etc., can solve the problem of high energy consumption, and achieve the effect of reducing the amount of feed and energy consumption

Active Publication Date: 2017-10-27
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 that there is a problem of high energy consumption in the prior art, and a new propylene recovery equipment is provided

Method used

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  • Propylene recovery equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Such as figure 1As 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 enter the flash tank 1 through pipeline 5, and the tank top The first light component stream is obtained, and the first heavy component stream is obtained at the bottom of the tank. The first light component stream enters the high-pressure propylene recovery tower 2, and after separation, the second light component stream is obtained at the top of the tower, and the second heavy component stream is obtained at the bottom of the tower; the second heavy component stream is discharged outside. The first heavy component stream enters the low-pressure propylene recovery tower 4, and after separation, the third light component stream is obtained at the top of the tower, and the third heavy component stream is obtained at the bottom of the tower; the third heavy component stream is discharged outside...

Embodiment 2

[0036] With [embodiment 1], just raw material and operating condition change.

[0037] 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%.

[0038] The operating conditions of the flash tank are: the operating pressure is 2.0 MPa, and the operating temperature at the top of the tower is 93°C.

[0039] The operating conditions of the high-pressure propylene recovery tower are as follows: the operating pressure is 0.9MPa, the operating temperature at the top of the tower is 19°C, the operating temperature at the bottom of the tower is 120°C, and the number of theoretical plates is 25.

[0040] The operating conditions of the low-pressure propylene recovery tower are as follows: the operating pressure is 0.3 MPa, the operating temperature at the top of the tower is -12°C, the operating temperatur...

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Abstract

The invention relates to a propylene recovery device, which mainly solves the problem of high energy consumption in the prior art. The present invention preferably solves the problem by adopting the propylene recovery and refining equipment comprising a flash tank, a high-pressure propylene recovery tower, a low-pressure propylene recovery tower and a depropanizer, and can be used in the industrial production of propylene recovery by a propylene oxide device.

Description

technical field [0001] The invention relates to a propylene recovery device, 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 oxide is increasing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/00C07C7/04C07C11/06C07D301/32C07D303/04
Inventor 李木金杨卫胜胡松黄云群
Owner CHINA PETROLEUM & CHEM CORP