ALUMINA COMPOSITES WITH LARGE PORE VOLUME AND LARGE SURFACE AREA OBTAINED FROM ALUMINUM OXIDE TRIHYDRATE, METHODS FROM PREPARATION THEREOF AND USE Russian patent published in 2005 - IPC

FIELD: inorganic compounds technologies.

SUBSTANCE: invention provides porous composite particles containing alumina component and residue of at least one additional crystal growth inhibitor component dispersed within alumina component, wherein indicated composite particles have (A) specific surface area at least 80 m²/g; (B) average nitrogen-filled pore diameter 60 to 1000 Å; (C) total nitrogen-filled pore volume 0.2 to2.5 cm³/g and (D) average particle size 1 to 15 μm, and where, in indicated composite particles, (i) alumina component contains at least 70 wt % of crystalline boehmite with average crystallite size 20 to 200 Å, γ-alumina obtained from indicated crystalline boehmite, or mixture thereof; (ii) residue of additional is obtained from at least one ionic compound containing ammonium, alkali metal, alkali-earth metal cation, or mixtures thereof and wherein anion is selected from group comprising hydroxyl, silicate, phosphate, sulfate, or mixtures thereof and is present in composite particles in amounts between 0.5 and 10 % of the summary weight of alumina and additional components. Invention also provides a method to obtain composite particles, agglomerated particles prepared therefrom, and a method for hydroprocessing of petroleum feed using above-mentioned agglomerates.

EFFECT: avoided unnecessary calcination before addition of metals to increase average pore size and use of organic solvents for azeotropic removal of water.

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