Process for conversion of synthesis gas to hydrocarbons...

Chemistry: fischer-tropsch processes; or purification or recover – Liquid phase fischer-tropsch reaction

Reexamination Certificate

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C518S714000

Reexamination Certificate

active

07943673

ABSTRACT:
A process is described for converting synthesis gas containing carbon monoxide and hydrogen to hydrocarbons via methanol as an intermediate, by contacting the synthesis gas with a catalyst system containing a mixture of gallium silicate zeolite catalyst and a methanol catalyst. The process results in reduced amounts of undesirable low carbon number hydrocarbons, e.g., C4and lower, undesirable high carbon number hydrocarbons, e.g., C10and higher, and aromatic hydrocarbons. The process provides higher yields of useful, high octane hydrocarbons boiling in the gasoline range.

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D. Freeman et al., “Methanol to Hydrocarbons: Enhanced Aromatic Formation Using Composite Group 13 Oxide/H-ZSM-5 Catalysts,”Catalysis Letters, 82, Nos. 3-4, Oct. 2002, pp. 217-225.
F. Simard et al., “Pseudoadiabatic Catalytic Reactor Operation for the Conversion of Synthesis Gas into Hydrocarbons (Gasoline Range),” Ind. Eng. Chem. Res., 30, 1991, pp. 1445-1455.
D. Cryder et al., “Catalysts for the Formation of Alcohols from Carbon Monoxide and Hydrogen,” Industrial and Engineering Chemistry, Sep. 1929, pp. 867-871.
M. Bradford, et al., “Preparation, Characterization and Application of Cr2O3/ZnO Catalysts for Methanol Synthesis,” Fuel Processing Technology, 83, 2003, pp. 11-25.

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