Method of recycling butadiene through selective hydrogenation of alkynes
A technology for selective hydrogenation and butadiene, applied in chemical instruments and methods, hydrogenation hydrocarbon production, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of small liquid space velocity, high product circulation ratio, etc. problems, to achieve the effect of improving acid properties, increasing production, and avoiding adverse factors
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Embodiment 1
[0062] The C4 fraction rich in alkynes is diluted with the C4 raffinate, and the weight ratio of the C4 fraction rich in alkynes to the C4 raffinate is 1:2.5. The isothermal reactor adopts a single-stage isothermal bubbling bed, and uses catalyst 1, and the catalyst is reduced at 120°C for 6 hours under a hydrogen atmosphere. Reaction temperature 50℃, reaction pressure 1.2MPa, liquid space velocity 8.5h -1 , the molar ratio of hydrogen to alkyne is 1.5, Table 2 is the composition of materials before and after the reaction.
[0063] Material composition before and after table 2 reaction
[0064]
Embodiment 2
[0066] The C4 fraction rich in alkynes is diluted with the C4 raffinate, and the weight ratio of the C4 fraction rich in alkynes to the C4 raffinate is 1:3. The isothermal reactor adopts a single-stage isothermal bubbling bed, and uses catalyst 2, and the catalyst is reduced at 120°C for 6 hours under a hydrogen atmosphere. The reaction temperature is 45°C, the reaction pressure is 1.5MPa, and the liquid space velocity is 9.0h -1 , the molar ratio of hydrogen to alkyne is 1.5, Table 3 is the composition of materials before and after the reaction.
[0067] Table 3 Composition of materials before and after reaction
[0068]
Embodiment 3
[0070] The C4 fraction rich in alkynes is diluted with the C4 raffinate, the weight ratio of the C4 fraction rich in alkynes to the C4 raffinate is 1:3, and the isothermal reactor adopts a single-stage isothermal bubbling bed, Catalyst 3 was used, and the catalyst was reduced at 120° C. for 6 h under hydrogen atmosphere. The reaction temperature is 45°C, the reaction pressure is 2.0MPa, and the liquid space velocity is 10.0h -1 , the molar ratio of hydrogen to alkyne is 2.0, Table 4 is the composition of materials before and after the reaction.
[0071] Material composition before and after table 4 reaction
[0072]
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