Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion
Reexamination Certificate
2005-04-05
2005-04-05
Dang, Thuan D (Department: 1764)
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Plural serial stages of chemical conversion
C208S063000, C208S064000, C208S067000
Reexamination Certificate
active
06875339
ABSTRACT:
The invention relates to methods for improving the octane number of a synthetic naphtha stream and optionally for producing olefins and/or solvents. In one embodiment, the method comprises aromatizing at least a portion of a synthetic naphtha stream to produce an aromatized hydrocarbon stream; and isomerizing at least a portion of the aromatized hydrocarbon stream to produce an isomerized aromatized hydrocarbon stream having a higher octane rating than the synthetic naphtha stream. Alternatively, the method comprises providing at least three synthetic naphtha cuts comprising a C4-C5stream; a C6-C8stream and a C9-C11stream; aromatizing some of the C6-C8stream to form an aromatized hydrocarbon stream with a higher octane number; steam cracking some of the C6-C8stream and optionally the C9-C11stream to form olefins; and selling some portions of C9-C11stream as solvents. In preferred embodiments, the synthetic naphtha is derived from Fischer-Tropsch synthesis.
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Allison Joe D.
Espinoza Rafael L.
Jack Doug S.
Lawson Keith H.
McDonald Steven R.
Conley & Rose, P.C.
ConocoPhillips Company
Dang Thuan D
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