Patent ID: 6576806
Filing Date: 2003-06-10
Classification: C07C

Abstract:
A process for treating a feedstock comprising olefins having an average carbon number ranging from 2-3.5, and non-olefinic compounds comprising at least one component that is reactive towards dienes, said process comprising:a) contacting a gaseous feedstock with a linear polyaromatic compound in a reaction zone under conditions effective to form a reaction mixture comprising linear polyaromatic compound-olefin adducts and unreacted gaseous feedstock, wherein said gaseous feedstock is selected from the group consisting of a stream derived from an olefins pyrolysis furnace; a stream derived from a catalytic cracker; a stream derived from a coker; a stream derived from a steam cracker; a stream derived from a wax cracker; a stream derived from a refinery thermal cracker using a vacuum flasher bottoms as the feed; a stream derived from a mixture of C4 hydrocarbons or less cut of a fractionation column fed by the product of a catalytic cracker; a stream derived by removal of light ends in a Fisher-Tropsch stream; a stream used to feed a C2 splitter; a stream used to feed a C3 splitter; a refinery grade propylene stream; and a chemical grade propylene stream; b) separating the olefin adducts from the unreacted gaseous feedstock; and c) dissociating the olefin adducts to form linear polyaromatic compounds and an olefin enriched composition comprising ethylene, propylene, or mixtures thereof; whereby the concentration of at least one of the olefins in said olefin enriched composition is enriched over the concentration of the corresponding olefin in the feedstock.