CATALYST AND METHOD FOR COMBINED TREATMENT OF LOW-OCTANE HYDROCARBON FRACTIONS AND ALIPHATIC ALCOHOLS AND/OR DIMETHYL EHTER Russian patent published in 2011 - IPC B01J29/40 B01J29/80 B01J21/00 B01J23/10 C07C1/20 C10G35/95 

FIELD: chemistry.

SUBSTANCE: described is a catalyst for producing high-octane gasoline with low content of benzene via combined treatment of low-octane hydrocarbon fractions with initial boiling point - 205°C and aliphatic alcohols and/or dimethyl ether, which contains a mechanical mixture of pentasil type zeolite with silica modulus SiO₂/Al₂O₃=18-25 which is first treated with aqueous solution of an alkali, modified with rare-earth metal or lanthanum oxide in amount of 0.5-2.0 wt % and a pentasil type zeolite with silica modulus SiO₂/Al₂O₃=70-90, modified with magnesium oxide in amount of 0.5-3.0 wt %, taken in ratio from 1/1 to 1/5, as well as binder in amount of 20 to 25% of the weight of the catalyst. Described also is a method of producing high-octane gasoline with low content of benzene via combined treatment of low-octane hydrocarbon fractions with initial boiling point - 205°C and aliphatic alcohols and/or dimethyl ether, in which the catalyst described above is heated in an isothermic reactor with heat pipes to temperature 280-350°C, the process of contacting the raw material with the catalyst, which is heated in the isothermic reactor with heat pipes, takes place at pressure 0.1-1 MPa while feeding into the reactor in two streams a mixture of methanol as oxygen-containing raw material and low-octane hydrocarbon fractions with volume rate of feeding the liquid raw material equal to 0.5-5 h^-1 after evaporation of the raw material in a pre-heater.

EFFECT: catalyst enables to obtain high-octane gasoline with low content of benzene.

7 cl, 3 tbl, 17 ex