Catalytic distillation method for selective hydrogenation of C4 hydrocarbon mixture
A hydrocarbon mixture and catalytic distillation technology, applied in the field of removing dimethyl ether, can solve the problems of unsuitability for processing, complicated equipment, inability to remove dimethyl ether, etc., and achieve the advantages of saving equipment and investment costs, and easy control of reaction temperature. Effect
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Embodiment 1
[0024] Hydrogen and C4 feedstock enter the tower from the upper and lower parts of the catalytic distillation tower at a volume ratio of 18.8 for countercurrent contact, and the downwardly flowing C4 raw material and upwardly flowing hydrogen react on the surface of the catalyst. The reaction conditions are: pressure 0.91MPa (absolute pressure ), the reaction temperature is 70°C, and the volume space velocity is 2.0. The liquid stream is fully refluxed. As can be seen from Table 1, the product does not contain diene, the dimethyl ether content is less than 1ppm, the butadiene conversion rate is 100%, the monoene yield is 82.3%, and 1-butene is isomerized into 2-butene The isomerization rate is 28.5%.
Embodiment 2
[0026] The process of this embodiment is basically the same as that of Example 1, and the reaction conditions are: pressure 0.91Mpa (absolute pressure), reaction temperature 70°C, volumetric space velocity 2.0, volume ratio of hydrogen to C4 raw material 11.6. The liquid stream is fully refluxed. As can be seen from Table 1, the product does not contain diene, the dimethyl ether content is less than 1ppm, the butadiene conversion rate is 100%, the monoene yield is 103.9%, and 1-butene is isomerized into 2-butene The isomerization rate is 52.7%.
Embodiment 3
[0028] The process of this embodiment is basically the same as that of Example 1, and the reaction conditions are: pressure 0.91 MPa (absolute pressure), reaction temperature 70° C., volumetric space velocity 2.5, and volume ratio of hydrogen to C4 raw material 17.4. The liquid stream is fully refluxed. As can be seen from Table 1, the product does not contain diene, the dimethyl ether content is less than 1ppm, the conversion rate of butadiene is 100%, the yield of monoene is 107.6%, and 1-butene is isomerized into 2-butene The isomerization rate is 85.3%.
[0029] raw material
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