Method for preparing olefin from methanol by employing fluidized bed reactor
A fluidized bed reactor, methanol preparation technology, applied in the direction of hydrocarbon production from oxygen-containing organic compounds, organic chemistry, bulk chemical production, etc., can solve the problem of large heat release, complex reactor, increased process complexity and operating costs and other problems, to achieve the effect of improving the selectivity of propylene and improving the selectivity of propylene
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Embodiment 1
[0047] use figure 1 The two-stage DN50 fixed fluidized bed reactor shown, the first fluidized bed reactor 1 is loaded with the catalyst 30g prepared above, the second fluidized bed reactor 2 is loaded with the above catalyst 120g, and the catalyst is ZSM-5 The mass content of the active component is 50%, the average particle size of the catalyst is 85 μm, the methanol water solution with the alcohol-water ratio of 20 is used as the raw material, and the mass space velocity of methanol is 5h -1 , the temperature of reaction in the first fluidized bed reactor is 440 ° C, and the pressure is 0.9 MPa, the reaction temperature of the second fluidized bed reactor is 500 ° C, and the pressure is 0.9 MPa, in the first fluidized bed reactor After the middle reaction, the propylene content in the product was measured to be 42%. The methanol conversion rate measured after the reaction in the second fluidized bed reactor is 99.6%, and the specific product distribution is as follows:
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Embodiment 2
[0050] use figure 1 The two-stage DN50 fixed fluidized bed reactor shown in the first fluidized bed reactor 1 is loaded with 50 g of the catalyst prepared above, and the second fluidized bed reactor 2 is loaded with 150 g of the above catalyst, and the catalyst is ZSM-5 The mass content of the active component is 30%, the average particle size of the catalyst is 85 μm, and the methanol aqueous solution with the alcohol-water ratio of 20 is used as the raw material, and the mass space velocity of methanol is 4h -1 , the reaction temperature of the first fluidized bed reactor is 440°C, and the pressure is 0.045MPa, the reaction temperature of the second fluidized bed reactor is 530°C, and the pressure is 0.045MPa, in the first fluidized bed reactor After the reaction, the propylene content recorded in the product is 40%, and the methanol conversion rate recorded after the reaction in the second fluidized bed reactor is 99.3%, and the specific product distribution is as follows: ...
Embodiment 3
[0053] use figure 1 The two-stage DN50 fixed fluidized bed reactor shown in the first fluidized bed reactor 1 is loaded with 50 g of the catalyst prepared above, and the second fluidized bed reactor 2 is loaded with 150 g of the above catalyst, and the catalyst is ZSM-5 The mass content of the active component is 55%, the average particle size of the catalyst is 85 μm, the methanol aqueous solution with the alcohol-water ratio of 10 is used as the raw material, and the mass space velocity of methanol is 2h -1 , the reaction temperature of the first fluidized bed reactor is 450°C and the pressure is 0.01MPa, the reaction temperature of the second fluidized bed reactor is 480°C and the pressure is 0.01MPa, after the reaction in the first fluidized bed reactor , the propylene content in the recorded product is 43%, and the methanol conversion rate measured after the reaction in the second fluidized bed reactor is 99.7%, and the specific product distribution is as follows:
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