Device for preparing methanol into propylene
A technology for producing propylene and methanol from methanol, applied in chemical instruments and methods, ether preparation, sustainable manufacturing/processing, etc., can solve the problems of increasing C4 cycle energy consumption and heater load, affecting propylene yield, and olefin waste, etc. Achieve the effects of efficient temperature control and stability, increase olefin content, and reduce fluctuations in propylene yield
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[0059] Example 1
[0060] using as figure 1 The simulation device shown is used for experiments, in which the catalyst in the first reactor 101 (ie the DME reactor) is γ-Al 2 O 3 (Choose the DME-1 catalyst of Clariant Co., Ltd.), and fill it in two layers. The second reactor 102 is provided with 5 catalyst beds 9, and the catalysts are uniformly packed into the first to fifth catalyst beds of the second reactor 102, wherein the spacing between the catalyst beds is up to (The distance between any intermediate catalyst bed and the adjacent catalyst bed below it is 1.1 times the distance between the adjacent catalyst bed above it).
[0061]Wherein, the feed amount of fresh methanol in the first reactor 101 is 2.5kg / h, and the total amount of catalyst charged in the first reactor is 1.8kg, and the reaction pressure is 0.8MPa. After preheating 60wt% of the total fresh methanol to about 270°C, it enters from the top of the first reactor, and the remaining methanol is directly se...
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[0064] Example 2
[0065] The difference from Example 1 is that in the obtained first product stream, the first product stream that accounts for (10±1) wt% is transported through the second feeding pipe 4, and the first product stream that accounts for (57±1) wt% The first product stream is conveyed through the third feed pipe 3 and the rest is conveyed through the first feed pipe 5 . The temperature of the liquid phase from the separation column 107 is further controlled at 55±2°C. At the same time, the distance between any intermediate catalyst bed in the second reactor 102 and the adjacent catalyst bed below it is 1.2 times the distance between the adjacent catalyst bed above it. The experimental results are shown in Table 1.
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