HIGH-OCTANE GASOLINE PRODUCTION PROCESS Russian patent published in 2006 - IPC C10G35/95 B01J29/46 

FIELD: petrochemical processes.

SUBSTANCE: hydrocarbon feedstock, containing narrow and wide hydrocarbon fractions boiling within a range from boiling point to 205°C and C₁-C₄-alcohols and/or dimethyl ether, which are blended in a system, to which they are supplied separately (by two pumps) at volume ratio (20.0-90.0):(10-80), respectively, is brought into contact with zeolite-containing catalyst at 380-420°C, pressure 0.2-5.0 MPa, and liquid feedstock volume flow rate 0.5-2.0·h^-1, whereupon reaction products are liberated from water produced in the reaction. Above-mentioned zeolite-containing catalyst is comprised of (i) Pentasil-type zeolite with silica ratio (SiO₂/Al₂O₃) 25-100 in amount 65-70% including residual amount of sodium ions equivalent to 0.05-0.1% sodium oxide, (ii) modifiers: zinc oxide (0.5-3.0%), rare-earth element oxides (0.1-3.0%), cobalt oxide (0.05-2.5%) or copper chromite (0.1-0.3%), and (iii) binder: alumina or silica in balancing amount.

EFFECT: increased octane number of gasoline.

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