-With high-performance S-MTO catalyst and fluidized-bed reactor, the loss of catalyst is small. The methanol conversion is high. The selectivity of ethylene and propylene can be high.
-The ratio of ethylene and propylene can be adjusted from 0.85 to 1.25.
-The applicable purity of methanol is 80-100 wt%, which can reduce the cost of methanol purification process.
-Front de-ethanization process is adopted, in which the ethylene recovery rate is high, and the purity of ethylene and propylene can be polymerization grade.