The expected 4-6% annual (2002-12) propylene demand growth above the 2000-1 world production of 65-70 Mons propylene and the rising propylene/ethylene wt. ratio, are likely to favor modification of conventional Fluid Catalytic Cracking parameters, reselection of olefin pyrolysis feed-stocks, and mollification of the pyrolysis regime (with ethylene yield failing) to increase propylene yields. Studies on conversion of MeOH into propylene are reviewed.