Plants for the production of propylene oxide

A technology for propylene oxide and cumene hydroperoxide, which is applied in the field of devices for producing propylene oxide, can solve the problem of high energy consumption, and achieve the effects of improving purity, reducing energy consumption and achieving good technical effects.

Active Publication Date: 2017-12-15
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 device for producing propylene oxide is provided

Method used

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  • Plants for the production of propylene oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0032] like figure 1 As shown, taking a 100,000-ton / year PO plant as an example, the raw material cumene hydroperoxide passes through pipeline 1 and fresh propylene passes through pipeline 2 to react in reactor I to form a liquid phase stream containing propylene oxide and propylene. The liquid phase stream containing propylene oxide and propylene is sent to the middle part of the high-pressure propylene recovery tower II through the pipeline 3. After separation, the propylene obtained from the side line of the tower is divided into two parts, and most of the propylene is sent back to the epoxidation reaction system I through the pipeline 8 Participating in the reaction, a small part of propylene enters the depropanizer VI through pipeline 7 for refining, the heavy component obtained in the tower reactor is sent to the adiabatic flash tank III through pipeline 5 for separation, and the light component obtained at the top of the tower is discharged through pipeline 4. The gas p...

Embodiment 2

[0043] With [embodiment 1], just raw material and operating condition change.

[0044] The liquid phase stream containing propylene oxide and propylene in pipeline 3, in terms of weight percent, the content of α,α-dimethylbenzyl alcohol is 26%, the content of cumene is 21.5%, and the content of propylene oxide is 10.5% %, the content of propylene is 39%, and the content of propane is 2%.

[0045] 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.

[0046] 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...

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Abstract

The invention relates to a device for producing propylene oxide, which mainly solves the problem of high energy consumption in the prior art. The present invention preferably solves this problem by adopting equipment including a reactor, 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 in a propylene oxide plant.

Description

technical field [0001] The invention relates to a device for producing propylene oxide. 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. [0003] The method of industrial production propylene oxide mainly contains chloroh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D301/19C07D301/32C07D303/04C07C7/04C07C11/06
Inventor 杨卫胜李木金
Owner CHINA PETROLEUM & CHEM CORP
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