Patent ID: 6677496
Filing Date: 2004-01-13
Classification: C10G

Abstract:
A process for the coproduction of ethylene and purified benzene comprising:providing a first mixture comprising benzene, toluene, and one or more C6 to C7 non-aromatics; separating the majority of the benzene and the one or more C6 to C7 non-aromatics from the majority of the toluene to form a second mixture containing at least a portion of the benzene and at least a portion of the one or more C6 to C7 non-aromatics, wherein the second mixture is substantially free of hydrocarbons having more than nine carbons; introducing at least a portion of the second mixture to a cracker and thereafter cracking at least about 80% of the C6 to C7 non-aromatics in the portion of the second mixture that has been introduced to the cracker while maintaining essentially no cracking of benzene to produce a cracked product containing ethylene, propylene and pyrolysis gasoline comprising olefins, di-olefins and benzene; and fractionating the pyrolysis gasoline to form a purified benzene product comprising at least about 80 wt % benzene.