Desirably, the oxygenate containing {HEAD ~ feedstock} is contacted with {TAIL ~ the silicoaluminophosphate catalyst} in a reactor at an average gas superficial velocity of greater than 1 meter per second 
is contacted with
Desirably , the oxygenate containing { HEAD ~ feedstock } is contacted with { TAIL ~ the silicoaluminophosphate catalyst } in a reactor at an average gas superficial velocity of greater than 1 meter per second
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH