Patent ID: 7141711

Claim:
A process for removing catalyst fines from an effluent stream from an oxygenate-to-olefin reactor, the process comprising: (a) withdrawing the reactor effluent stream from the reactor; (b) transporting the reactor effluent stream in a first conduit to a quench device, wherein the reactor effluent stream travels through the first conduit at a first velocity of about 100 ft/sec (30 m/sec) or greater, and wherein the first conduit has a conduit diameter and has one or more bends each having a bend radius, such that a ratio of the bend radius to the conduit diameter is about 1:1 or greater; (c) quenching the reactor effluent stream with a quench medium in the quench device to form a quenched effluent stream and a liquid fraction, the liquid fraction containing a majority of the catalyst fines; and (d) transporting the liquid fraction in a second conduit to a solids separation device.