The present invention provides various processes for producing light
olefins from methanol and ethanol, optionally in a mixed alcohol stream.
In one embodiment, the invention includes directing a first syngas stream
to a methanol synthesis zone to form methanol and directing a second
syngas stream and methanol to a homologation zone to form ethanol. The
methanol and ethanol are directed to an oxygenate to olefin reaction
system for conversion thereof to ethylene and propylene.