Method for producing propylene
A technology of propylene and ethylene, which is applied in the production of bulk chemicals, chemical instruments and methods, purification/separation of hydrocarbons, etc., can solve the problems of low propylene weight yield, achieve hydrogen saving, increase weight yield, and good activity Effect
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[0048] [Example 1]
[0049] according to figure 1 As shown in the process flow, the components of the cracked C5 fraction are as shown in Table 1, after removing the cyclopentadiene in the raw material through the decyclopentadiene unit, the C5 fraction without cyclopentadiene is obtained, and the C5 fraction is removed. The C5 fraction components of dicyclopentadiene are shown in Table 1, and then enter into the selective hydrogenation catalyst contact reaction with C4 raw materials to obtain monoolefin C4 and C5 streams, whose components are shown in Table 1, and the monoolefin carbon 5. The C4 stream and the fresh ethylene outside the boundary are mixed to form a mixed raw material. The mixed raw material is treated by the adsorbent in the adsorption tower to remove the impurities in the raw material. The treated material is passed through the isomerization reactor and the disproportionation reactor. The reaction obtains the target product propylene, unreacted ethylene, C5...
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[0054] [Examples 2 to 12]
[0055] The reaction was carried out according to the various conditions and steps of Example 1, but different operating parameters were changed. The components of the hydrogenation catalyst and adsorbent were selected as shown in Table 2, and the components of the isomerization catalyst and disproportionation catalyst were shown in Table 3. , the operating conditions of the decyclopentadiene unit are shown in Table 4, the operating conditions of the selected hydrogenation reactor and the adsorption tower are shown in Table 5, and the operating conditions of the isomerization reactor and the disproportionation reactor are shown in Table 6 , the reaction results are shown in Table 7.
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