Method for producing propylene by cracking carbon five fractions
A technology for cracking carbon and propylene, which is applied in the directions of metathesis reaction to produce hydrocarbons, chemical instruments and methods, hydrocarbons, etc., can solve the problems of low propylene weight yield and other problems, and achieve the effects of saving hydrogen, improving yield and improving economic benefits.
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Embodiment 1
[0036] according to figure 1 Shown technological process, the component of cracking C5 fraction is as shown in table 1, obtains the C5 fraction not containing cyclopentadiene after decyclopentadiene unit removes the cyclopentadiene in raw material, removes The carbon five distillate components of dicyclopentadiene are as shown in Table 1, and then contacted with a selective hydrogenation catalyst to obtain a monoolefin carbon five stream, and its components are as shown in table 1. The monoolefin carbon five stream and the outside of the boundary Fresh ethylene is mixed to form a mixed raw material. The mixed raw material is treated by an adsorbent in the adsorption tower to remove impurities in the raw material. The treated material is contacted with the disproportionation catalyst in the disproportionation reactor to react, and the reaction produces the target product propylene, unreacted ethylene And carbon five olefins, the reaction product is separated by a deethylene tow...
Embodiment 2～6
[0041] React by each condition and step of embodiment 1, just change different operation parameter, select the component of hydrogenation catalyst, adsorbent and disproportionation catalyst as shown in table 2, the operating condition of decyclopentadiene unit is as shown in table 3 As shown, the operating conditions of the selected hydrogenation reactor and the disproportionation reactor are shown in Table 4, the operating conditions of the deethylene tower and the depropylene tower are shown in Table 5, and the reaction results are shown in Table 6.
Embodiment 7
[0043] according to figure 1 The process flow shown is just an isomerization reactor added between 22 and 23. The components of the cracked C5 fraction are shown in Table 1. The cracked C5 fraction is removed from the cyclopentadiene in the raw material by the decyclopentadiene unit to obtain the C5 fraction without cyclopentadiene, and the dicyclopentadiene is removed. The C5 fraction of diene is as shown in Table 1, and then contacted with a selective hydrogenation catalyst to obtain a monoolefin C5 stream, its components are as shown in Table 1, and the monoolefin C5 stream is first sent to the isomerization reaction device, the reaction is to obtain a stream rich in 2-methyl-2-butene and 2-pentene, which is then mixed with fresh ethylene outside the boundary area to form a mixed raw material, which is treated by the adsorbent in the adsorption tower Finally, the impurities in the raw material are removed, the treated material is contacted with the disproportionation catal...
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