CATALYTIC COMPOSITION FOR DEHYDRATION OF ALKYLAROMATIC HYDROCARBONS (OPTIONS), METHOD OF PREPARING THE SAME (OPTIONS), AND A PROCESS OF DEHYDRATION OF ALKYLAROMATIC HYDROCARBONS Russian patent published in 2006 - IPC B01J23/34 B01J23/96 C07C5/333 

FIELD: hydrogenation-dehydrogenation catalysts.

SUBSTANCE: invention provides catalytic composition for dehydration of alkylaromatic hydrocarbons optionally combined with ethane comprising: carrier consisting of alumina in δ phase or in θ phase, or in mixed δ+θ or θ+α, or δ+θ+α phase, modified with silicon oxide and having surface area less than 150 m²/g as measured by BET method; 0.1-35% gallium in the form of Ca₂O₃; 0.01-5% manganese in the form of Mn₂O₃; 0-100 ppm platinum; and 0.05-4% alkali or alkali-earth metal oxide, all percentages being based on the total weight of composition. Other variants of composition are also covered by invention. Methods of preparing such catalytic composition (options) envisage use of alumina-based carrier in the form of particles corresponding to group A of the Geldart Classification. Process of dehydration of alkylaromatic hydrocarbons optionally combined with ethane comprises: (i) dehydration of hydrocarbon stream optionally mixed with inert gas in fluidized-bed reactor in presence of catalytic composition consisted of alumina-supported and silica-modified gallium and manganese at temperature within a range of 400 to 700°C, total pressure within a range of 0.1 to 3 atmospheres, and gas hourly space velocity from 50 to 10000 h^-1; and (ii) regeneration and heating of catalyst caused by catalytic oxidation of fuel in fluidized-bed reactor at temperature above 400°C.

EFFECT: increased activity of catalytic composition and prolonged lifetime thereof.

22 cl, 2 tbl, 16 ex