Resourceful treatment method for producing ethylbenzene by using alkylation tail gas after styrene preparation from refinery dry gas
A treatment method, styrene technology, applied in chemical instruments and methods, purification/separation of hydrocarbons, purification/separation of chemical changes, etc., can solve problems such as high energy consumption and complicated process, and achieve low energy consumption and low reaction temperature , the effect of improving the utilization rate
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Embodiment 1
[0064] See figure 1 As shown, it is realized through the following steps:
[0065] 1) Hydrocarbonized tail gas 1 from catalytic cracking FCC dry gas to styrene unit, its molar composition is H 2 40.8%, N 2 15.93%, CO 3.25%, CO 2 1.98%, CH 4 25.81%, C 2 h 6 12.21%, C 2 h 4 0.03%; mixed with recycle gas 19 to obtain mixed gas 2, which is pressurized by compressor a 3 to 0.8MPa and sent to pressure swing adsorption device to remove hydrogen, nitrogen, methane, carbon monoxide and other weakly adsorbed components 5 , to obtain PSA enriched gas 6 rich in ethane components;
[0066] 2) PSA concentrated gas 6 is pressurized to 1.2MPa by compressor b 7, mixed with oxidant and diluent gas 9, and then sent to the ethane oxidative dehydrogenation reaction device. Under the action of the catalyst, ethane undergoes oxidative dehydrogenation reaction to form The oxidative dehydrogenation product 10 rich in ethylene, its main components are ethylene, water, oxygen, nitrogen, ca...
Embodiment 2
[0080] See figure 1 As shown, it is realized through the following steps:
[0081] 1) Hydrocarbonized tail gas 1 from catalytic cracking DCC dry gas to styrene plant, its molar composition is H 2 21.28%, N 2 16.82%, CO 0.74%, CO 2 0.49%, O 2 2.1%, CH 4 44.66%, C 2 h 6 13.85%, C 2 h 4 0.05%; mixed with recycle gas 19 to obtain mixed gas 2, which is pressurized by compressor a 3 to 1.0 MPa and sent to pressure swing adsorption device to remove hydrogen, nitrogen, methane, carbon monoxide and other weakly adsorbed components 5 , to obtain PSA enriched gas 6 rich in ethane components;
[0082] 2) PSA concentrated gas 6 is pressurized to 1.1MPa by compressor b 7, mixed with oxidant and diluent gas 9, and sent to the ethane oxidative dehydrogenation reaction device, under the action of the catalyst, ethane undergoes oxidative dehydrogenation reaction to form The oxidative dehydrogenation product 10 rich in ethylene, its main components are ethylene, water, oxygen, ni...
Embodiment 3
[0096] See figure 2 As shown, it is realized through the following steps:
[0097] 1) Hydrocarbonized tail gas 1 from catalytic cracking DCC dry gas to styrene plant, its molar composition is H 2 21.28%, N 2 16.82%, CO 0.74%, CO 2 0.49%, O 2 2.1%, CH 4 44.66%, C 2 h 6 13.85%, C 2 h 4 0.05%; mixed with recycle gas 19 to obtain mixed gas 2, which is pressurized by compressor a 3 to 1.0 MPa and sent to pressure swing adsorption device to remove hydrogen, nitrogen, methane, carbon monoxide and other weakly adsorbed components 5 , to obtain PSA enriched gas 6 rich in ethane components;
[0098] 2) PSA concentrated gas 6 is pressurized to 1.1MPa by compressor b 7, mixed with oxidant and diluent gas 9, and sent to the ethane oxidative dehydrogenation reaction device, under the action of the catalyst, ethane undergoes oxidative dehydrogenation reaction to form The oxidative dehydrogenation product 10 rich in ethylene, its main components are ethylene, water, oxygen, n...
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