Process for preparing propylene through combined reaction feeding and catalyst regeneration countercurrent contact dehydrogenation
A catalytic dehydrogenation and countercurrent contact technology, which is applied in catalyst regeneration/reactivation, physical/chemical process catalysts, organic chemistry, etc., can solve the problems of easy blockage of terminal reactors, short operation cycle of UOP process, and influence on operation cycle, etc. Achieve the effect of reducing catalyst dust, reducing the risk of clogging and long operation cycle
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[0033] Example 1
[0034] Propane / H 2 After mixing according to 100:50mol, according to 15Nm 3 / h into the reactor, heated to 625°C by heating furnace H1, then enter the first reactor R1, then heated to 625°C by heating furnace H2, enter the second reactor R2, and then heated to 625°C by heating furnace H3 The third reactor R3 is finally heated to 625℃ by the heating furnace H4 and enters the fourth reactor R4. It runs continuously for 3 hours. The reacted product (propylene) enters the subsequent separation system for separation. The analysis can get a yield of up to 33.6% propylene;
[0035] Catalyst cyclic regeneration: the process gas is carried out in the direction from R1-R2-R3-R4, the feed direction of the catalyst and the process gas is exactly opposite, the phase countercurrent reaction, the process gas flows from the direction of the reactor R1-R2-R3-R4, The catalyst flows in the direction of the reactor R4-R3-R2-R1.
[0036] During the catalyst cycle regeneration process...
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[0038] Example 2
[0039] Propane / H 2 After mixing according to 100:50mol, according to 15Nm 3 / h into the reactor, heated to 615℃ by heating furnace H1, then enter the first reactor R1, then heated to 615℃ through heating furnace H2, enter the second reactor R2, and then heated to 615℃ through heating furnace H3 The third reactor R3 is finally heated to 615℃ by heating furnace H4 and enters the fourth reactor R4. It runs continuously for 3 hours. The reacted product (propylene) enters the subsequent separation system for separation. The analysis can get a yield of up to 31.2% propylene;
[0040] Catalyst cyclic regeneration: the process gas is carried out in the direction from R1-R2-R3-R4, the feed direction of the catalyst and the process gas is exactly opposite, the phase countercurrent reaction, the process gas flows from the direction of the reactor R1-R2-R3-R4, The catalyst flows in the direction of the reactor R4-R3-R2-R1.
[0041] During the catalyst cycle regeneration proc...
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