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...Crude oil to chemicals light olefins from a b corma e corresa y mathieu l sauvanaud s al bogami m ghrami bourane the possibility fulfill increasing market demand and producer needs processing cheap universally available feedstock such as produce petrochemicals appears be very attractive strategy indeed many are produced side streams during refining which primary goal remains transportation fuel production availability of some critical feedstocks may then depend on local policy in order improve flexibility it has been proposed directly crack particular ethylene propylene butenes using technologies derived fluid catalytic cracking this paper attempts review main research works done topic literature last five decades focussing process well catalyst technology with special interest for fcc based that can used towards maximizing severe conditions purpose additives zsm more exotic metal doped recycle multiple riser systems introduction dictated by price therefore limiting their applicability...