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Propylene recovery device

A technology of propylene and equipment, which is applied in the field of equipment for recovering propylene from propylene epoxidation reaction products, can solve the problem of high energy consumption, and achieve the effect of reducing the amount of feed and reducing energy consumption

Active Publication Date: 2016-01-27
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 equipment for recovering propylene is provided

Method used

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  • Propylene recovery device

Examples

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Effect test

Embodiment 1

[0025] 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 pass through the pipeline 11 first It is sent to the high-pressure propylene recovery tower 1 for separation, the top of the tower obtains the first light component stream, and the tower bottom obtains the first recombination containing α,α-dimethylbenzyl alcohol, cumene, propylene oxide, a small amount of propylene and propane Sub-logistics. The first heavy component stream is sent to the low pressure propylene recovery tower 2 for separation, the second light component stream is obtained at the top of the tower, and the crude propylene oxide product stream from which propylene is removed is obtained from the tower bottom. The propylene stream recovered at the top of the low-pressure propylene recovery tower 2 is divided into two parts, a part of which en...

Embodiment 2

[0034] Same as [Example 1], except that the raw materials and operating conditions are changed.

[0035] In the raw materials, in terms of weight percentage, 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%, and the content of propane is The content is 2%.

[0036] The operating conditions of the high-pressure propylene recovery tower are: the operating pressure is 1.6MPa, the operating temperature at the top of the tower is 40°C, the operating temperature of the tower bottom is 87°C, and the number of theoretical plates is 25.

[0037] The operating conditions of the low pressure propylene recovery tower are as follows: operating pressure is 0.2MPa, tower top operating temperature is -20°C, tower bottom operating temperature is 120°C, and the number of theoretical plates is 20.

[0038] The operating conditions of the de-propanizer are as follows: operating pressure is 2.0MPa, op...

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Abstract

The invention relates to a propylene recovery device, and is used for mainly solving the problem of high energy consumption in the prior art. The problem is better solved through adopting a propylene recovery refining device comprising a high-pressure propylene recovery tower, a low-pressure propylene recovery tower and a depropanization tower, and the propylene recovery device can be used for industrial production of recovery of propylene with an epoxy propane device.

Description

Technical field [0001] The invention relates to a device for recovering propylene, in particular to a device for recovering propylene from a reaction product of propylene epoxidation. Background technique [0002] Propylene oxide (PO) is a very important organic chemical raw material. It is the third largest organic chemical product in the production of propylene derivatives after polypropylene and acrylonitrile. It is mainly used to produce 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, light industry, medicine, food, textile and other industries, and have great influence on the development of chemical industry and national economy. profound influence. With the expansion of the use of propylene oxide and the increase in the amount of downstream products, the demand for the propylene oxide market is increasing. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/04C07C11/06C07D301/32C07D303/04
Inventor 李木金杨卫胜施德李向勇
Owner CHINA PETROLEUM & CHEM CORP
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