Patent ID: 7935650

Claim:
A process for separating and reusing of catalyst in an oxygenate to olefins reaction system, the process comprising the steps of: (a) converting oxygenates to olefins in a reactor in the presence of a catalyst having carbonaceous deposits; (b) withdrawing from the reactor an effluent stream comprising the olefins, the effluent stream being entrained with a portion of the catalyst having carbonaceous deposits; (c) contacting the effluent stream with a neutralized quench medium in a quench tower to produce a catalyst-containing stream separated from said effluent stream; (d) neutralizing the quench medium in a separate stage of the quench tower; (e) incinerating in an incinerator the carbonaceous deposits that are in the portion of the catalyst in the catalyst-containing stream; and (f) sending the incinerated catalyst-containing stream to the said reactor.