Patent ID: 7541504

Claim:
A method for producing olefins, solvents, and light aromatic hydrocarbons from a synthetic naphtha stream, comprising: (a) providing three synthetic hydrocarbon streams, including: 1) a light hydrocarbon stream comprising primarily C4-C5 acyclic hydrocarbons, 2) an intermediate hydrocarbon stream comprising primarily C6-C8 acyclic hydrocarbons; and 3) a heavy fraction comprising primarily C9-C11 acyclic hydrocarbons; (b) passing the light hydrocarbon stream and optionally, at least a portion of the heavy hydrocarbon stream to a steam cracker; (c) cracking in the presence of steam at least a portion of the light hydrocarbon stream and optionally, at least a portion of the heavy hydrocarbon stream under suitable cracking conditions in said steam cracker so as to convert at least a portion of the acyclic hydrocarbons to olefins and to produce a steam cracker effluent, wherein the stream cracker effluent comprises said olefins; and (d) reacting the intermediate hydrocarbon stream under aromatization promoting conditions so as to convert at least some of the acyclic hydrocarbons to aromatic hydrocarbons and generate a cyclized hydrocarbon stream, wherein the cyclized hydrocarbon stream includes said aromatic hydrocarbons and unconverted acyclic hydrocarbons, and has an octane number higher than that of the intermediate hydrocarbon fraction, wherein the method further includes one hydrotreating step selected from the group consisting of: hydrotreating the hydrocarbon feedstream with hydrogen prior to step (B); hydrotreating the light hydrocarbon stream and optionally at least a portion of the heavy fraction with hydrogen prior to step (C); and combination thereof.