MULTISTAGE REACTOR SYSTEMS AND PROCESSES FOR CONVERSION OF OXYGENATES

Exemplary processes for converting one or more oxygenates to one or more olefins are disclosed. In one exemplary aspect, the process can include introducing a first input feed into an adiabatic multistage reactor with a first reactor bed and a second reactor bed. The process can also include contacting the first input feed with the first reactor bed to maintain a first temperature of the first reactor bed within a first temperature range and to produce a first reaction mixture, and introducing a second input feed into the multistage reactor such that the first reaction mixture is mixed with the second input feed to produce a first effluent. The process can also include contacting the first effluent with the second reactor bed to thereby maintain a second temperature of the second reactor bed within a second temperature range and to produce a second reaction mixture. Exemplary systems are also disclosed.