Method of preparing butadiene from gasoline
A technology for butadiene and gasoline, applied in the field of butadiene preparation, can solve the problems of low yield of butadiene and achieve the effects of low yield of methane, reduced energy consumption and high yield
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Embodiment 1
[0051] This example is used to illustrate the method for preparing butadiene from gasoline of the present invention.
[0052] (1) Hydrogenation
[0053] The pyrolysis gasoline (the physical parameters are shown in Table 2 below) is directly hydrogenated and used as the cracking raw material. The hydrogenation process is as follows: the hydrogenation of the pyrolysis gasoline is carried out in four hydrogenation reactors, the first one is the hydrogenation of diolefins reactors, the second is a mono-olefin hydrogenation reactor, and the third and fourth are aromatic hydrogenation reactors connected in series. In the diolefin hydrogenation reactor, the catalyst used is LY-9801 (purchased from the Chemical Research Institute of Lanzhou Petrochemical Company, the Pd content is 0.3% by weight, and the carrier is Al 2 o 3 ), the reactor inlet temperature is 60°C, the absolute pressure is 2.6MPa, the molar ratio of hydrogen to oil is 0.6, and the volumetric space velocity of pyroly...
Embodiment 2
[0066] This example is used to illustrate the method for preparing butadiene from gasoline according to the present invention.
[0067] Carry out hydrogenation and steam cracking according to the method for embodiment 1, difference is, in steam cracking process, the mixture that hydrogenation reaction product mixes with naphtha with the weight ratio of 1:1 injects CBL-III type cracking furnace (purchased from China Petrochemical Corporation) for steam cracking reaction.
[0068] The cracked gas was analyzed according to the method of Example 1, and the yield of butadiene and the yield of methane were calculated, and the results are shown in Table 6 below. Then, the cracked gas was separated according to the method of Example 1, and the energy consumption of the cold box was recorded, and the results are shown in Table 6 below.
Embodiment 3
[0070] This example is used to illustrate the method for preparing butadiene from gasoline provided by the present invention.
[0071] Carry out hydrogenation and steam cracking according to the method for embodiment 1, difference is, in steam cracking process, the mixture that hydrogenation reaction product mixes with naphtha with the weight ratio of 1:4 injects CBL-III type cracking furnace (purchased from China Petrochemical Corporation) for steam cracking reaction.
[0072] The cracked gas was analyzed according to the method of Example 1, and the yield of butadiene and the yield of methane were calculated, and the results are shown in Table 6 below. Then, the cracked gas was separated according to the method of Example 1, and the energy consumption of the cold box was recorded, and the results are shown in Table 6 below.
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