HETEROGENEOUS CATALYSTS FOR PRODUCING BENZENE AROMATIC HYDROCARBONS FROM METHANOL AND METHANOL PROCESSING METHOD Russian patent published in 2013 - IPC B01J29/40 C10G35/95 C07C1/20 

FIELD: chemistry.

SUBSTANCE: invention relates to heterogeneous catalysts for producing benzene aromatic hydrocarbons. Described is a catalyst for converting methanol for producing benzene aromatic hydrocarbons, which contains decationated pentasil-type zeolite which is modified by mixture of zirconium pyrophosphate, zinc oxide and zirconium dioxide, has molar ratio SiO₂/Al₂O₃ of 120-200 and contains sodium cations in an amount which is equivalent to 0.059-0.010 wt % sodium oxide, formed with binder from a gamma-modification of aluminium oxide and zirconium dioxide, with the following content of components, wt %: 65 (zeolite - 96.5-97.8 with content of modifier of (59 wt % ZrP₂O₇; 31 wt % ZnO and 10 wt % ZrO₂), of 3.5-2.2) and 35 binder, from the sum of anhydrous oxides (γ-aluminium oxide - 80 and zirconium dioxide - 20). Described is a catalyst for producing benzene aromatic hydrocarbons, which contains decationated pentasil-type zeolite which is modified by mixture of copper oxide, zinc oxide and gallium oxide, has molar ratio SiO₂/Al₂O₃ of 120-200 and contains sodium sodium cations in an amount which is equivalent to 0.24-0.11 wt % sodium oxide, formed by binder, with the following content of components, wt %: 65 (zeolite - 93.0-95.0, with content of zeolite modifier of (80 wt % CuO; 13 wt % ZnO and 7 wt % Ga₂O₃), of 7.0-5.0) and 35 binder, from the sum of anhydrous oxides (γ-aluminium oxide - 80 and zirconium dioxide - 20). Described is a method of producing benzene aromatic hydrocarbons from methanol which involves catalytic conversion of methanol in at least two reactors with different catalysts into a mixture of olefins and water vapour in a first reactor and subsequent conversion of said mixture in a second reactor, cooling the obtained gaseous products, condensation, separation with extraction of light paraffins, water, a mixture of aromatic hydrocarbons and recycling the cooled paraffins through both catalysts while feeding methanol into the first reactor, wherein said methanol conversion catalyst is used in the first reactor when converting methanol to olefins and formation of aromatic hydrocarbons from olefins in the second reactor takes place using said catalyst for producing benzene aromatic hydrocarbons, wherein conversion of methanol to olefins is carried out at temperature of 300-360°C, pressure of not more than 0.5 MPa and methanol mass feed rate of 2-3 h^-1, and conversion of olefins in the reactor for formation of aromatic hydrocarbons is carried out at temperature of 450-530°C, pressure of 1.0-2.0 MPa and mass feed rate of methanol conversion products of 1.7-3.0 h^-1, and recycling is carried out at a rate of 7 moles paraffins per mole methanol.

EFFECT: reduced amount of light hydrocarbon gases and high content of alkylarenes produced onshore.

9 cl, 9 ex