The present invention provides {TAIL ~ a process} for making {HEAD ~ an olefin product} from an oxygenate feedstock which comprises: 
The present invention provides { TAIL ~ a process } for making { HEAD ~ an olefin product } from an oxygenate feedstock which comprises :
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH