Method for preparing olefin from methanol
A technology for producing olefins and methanol from methanol is applied in chemical instruments and methods, hydrocarbon production from oxygen-containing organic compounds, ethylene production, etc., and can solve the problems of low coke formation rate, high methanol unit consumption, and low methanol unit consumption.
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Embodiment 1
[0045] Before methanol is fed, the reactor and regenerator are lined, inert gas replaced, catalyst loaded, catalyst temperature raised, and catalyst fluidized according to conventional operations in the field.
[0046] This example is in figure 1 The reaction is carried out in the methanol-to-olefins circulating fluidized reaction regeneration system shown, methanol enters the methanol-to-olefins reactor 2 from the methanol raw material inlet 6, the mass flow rate of methanol is 225kg / h, and the ratio of alcohol to olefins is 1.5. The catalyst inventory in the methanol-to-olefins reactor 2 is 35kg, the average residence time of the catalyst in the methanol-to-olefins reactor 2 is 0.233h, the reaction temperature is 475°C, the reaction pressure is 0.22MPa, and the methanol partial pressure is 0.18MPa.
[0047] The spent catalyst discharged from the outlet of the methanol-to-olefins reactor 2 has a carbon content of 7.9 wt%, and a flow rate of 150 kg / h. The spent catalyst enter...
Embodiment 2
[0050] The system composition and process of Embodiment 2 and Embodiment 3 are the same as those of Embodiment 1, except that the operating conditions are different. The operating conditions of embodiment 2 and embodiment 3 are as shown in table 1, and the product composition and methanol unit consumption of embodiment 2 and embodiment 3 are as shown in table 2.
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