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Epoxy propane production method

A technology of propylene oxide and production method, which is applied in the direction of chemical instruments and methods, hydrocarbons, organic chemistry, etc., can solve the problem of high energy consumption, and achieve the effect of reducing the amount of feed and reducing energy consumption

Inactive 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 method for producing propylene oxide is provided

Method used

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  • Epoxy propane production method

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Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, taking a 100,000-ton / year PO plant as an example, the raw material cumene hydroperoxide 1, fresh propylene 2 and recycled propylene 8, 10, 11 react in reactor Ⅰ to form propylene oxide, propylene and propane The liquid phase stream 3. The stream 3 is sent to the flash tank II for separation, the gas phase product 4 obtained at the top of the flash tank is sent to the high-pressure propylene recovery tower III for refining, and the liquid product 5 obtained at the bottom of the flash tank is sent to the low-pressure propylene recovery tower IV for refining. The overhead stream of the high-pressure propylene recovery tower III is divided into two parts, and a small part of stream 8 enters the depropanizer V for refining. Propylene is obtained from the top of depropanizer V, and propane 9 is removed from the bottom of the tower. The stream 7 obtained from the bottom of the high-pressure propylene recovery tower III and the stream 12 obtained fr...

Embodiment 2

[0039] With [embodiment 1], just raw material and operating condition change.

[0040] In the liquid phase stream 3, by 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%, and the content of propylene is 39%. , the content of propane is 2%.

[0041] 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.

[0042] 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.

[0043] 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 temp...

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Abstract

The invention relates to an epoxy propane production method, and is used for mainly solving the problem of high energy consumption in the prior art. The problem is better solved through adopting the technical scheme that the epoxy propane production method comprises the steps: a liquid material flow is generated from cumyl hydroperoxide and propylene in a reactor; the liquid material flow goes into a flash tank, a first light component material flow is obtained at a tank top, and a first heavy component material flow is obtained at a tank bottom; the first light component material flow goes into a high pressure propylene recovery tower, a second light component material flow is obtained at a tower top, and a second heavy component material flow is obtained at a tower kettle; the first heavy component material flow goes into a low-pressure propylene recovery tower, a third light component material flow is obtained at a tower top, and a third heavy component material flow is obtained at a tower kettle; a part of the second light component material goes into a depropanizing tower, a fourth light component material flow is obtained at a tower top, and a fourth heavy component material flow is obtained at a tower kettle; and a part of the second light component material flow except the part going into the depropanizing tower, the third light component material flow and the fourth light component material flow circulate back to the reactor. The epoxy propane production method can be used for industrial production of recovery of propylene with an epoxy propane device.

Description

technical field [0001] The invention relates to a method 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 Applications(China)
IPC IPC(8): C07D301/12C07D301/32C07D303/04C07C7/00C07C7/04
Inventor 李木金杨卫胜施德
Owner CHINA PETROLEUM & CHEM CORP
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