Patent ID: 7935857

Claim:
A method for separating solids from a gas-solids flow comprising: producing a plurality of product gas-solids flows by performing an oxygenate to olefin conversion reaction in a plurality of reactors; separating each of the plurality of product gas-solids flows into a corresponding higher density flow and lower density flow, each higher density flow comprising a majority of the solids contained in the corresponding product gas-solids flow; receiving the solids from each higher density flow in a transition zone; flowing a displacing gas, from one or more displacing gas inlets within the transition zone, countercurrently through the received solids while passing the received solids through the transition zone; and returning the received solids to the plurality of reactors via standpipes, the entry locations for each standpipe being separated from the one or more displacing gas inlets by a separation distance of at least 25 cm.