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.
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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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