Treatment method for three-spinning recycling of catalyst in reactor for preparing alkene from methyl alcohol
A technology of methanol to olefins and treatment methods, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low safety factor and easy mixing of impurities in products, and achieve high safety factor and good technical effect Effect
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[0014] [Example 1]
[0015] In the methanol-to-olefin circulating fluidized bed reaction-regeneration unit, the catalyst is SAPO-34, the reactor is a fluidized bed, and the outlet is set with three rotations. The separation efficiency is about 68%. The average particle size of the recovered catalyst fine powder is about 16 Micron, the recovered catalyst fine powder enters the first-level catalyst fine powder collection tank, the fluidized gas in the first-level catalyst fine powder collection tank is water vapor at 265°C, and the first-level catalyst fine powder collection tank is the catalyst fine powder 5 % Is returned to the reactor, the flow rate of the catalyst fine powder is controlled by the slide valve, 95% enters the secondary catalyst fine powder collection tank, the fluidizing gas in the secondary catalyst fine powder collection tank is nitrogen, the primary catalyst fine powder collection tank and the secondary There is a standpipe between the catalyst fine powder col...
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[0016] [Example 2]
[0017] According to the method and steps described in Example 1, the recovered catalyst fine powder enters the primary catalyst fine powder collection tank, the fluidized gas in the primary catalyst fine powder collection tank is fuel gas, and the fuel gas comes from the methanol-to-olefin process By-products (methane, hydrogen, ethane, etc.) generated in the first stage catalyst fine powder collection tank, 80% of the catalyst fine powder is returned to the reactor, and the flow rate of the catalyst fine powder is controlled by the slide valve, and 20% enters the secondary catalyst fine powder Collecting tank, the fluidized gas in the secondary catalyst fine powder collection tank is air, and a riser is arranged between the primary catalyst fine powder collection tank and the secondary catalyst fine powder collection tank to maintain sufficient catalyst material seal to prevent secondary catalysts The fluidized gas from the fine powder collection tank flees ...
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