Separation method for preparing low-carbon olefin gas through methanol conversion
A low-carbon olefin and methanol conversion technology, applied in the field of petrochemical industry, can solve the problems of ineffective removal and inability to obtain purity
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[0096] Such as figure 2 As shown, in addition to ethylene and propylene, it also includes one or more mixtures of hydrogen, oxygen, nitrogen, carbon monoxide, carbon dioxide, methane, ethane, acetylene, propane, cyclopropane, propyne and propadiene as Methanol conversion to produce light olefins gas removal of oxygenates, water and C 4 and C 4 The low-carbon olefins stream after the above hydrocarbons passes through the first dryer 2 (built-in) through the low-carbon olefins stream line 1 Molecular sieve) for primary dehydration (note: water is a small amount of water entrained by the low-carbon olefin stream), and after heat exchange in the first heat exchanger 3, it enters the carbon monoxide removal tank 4 (built-in carbon monoxide removal copper-based catalyst, such as C18 catalyst) to remove large amounts of carbon monoxide. Part of the carbon monoxide, the low-carbon olefin stream after the cooling of the first cooler 5 enters the second dryer 6 (built-in Molecular...
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