Method of preparation of spherical media


(57) Abstract:

1. Method of preparation of spherical media, including the dissolution of aluminum metal in a strong mineral acid to obtain alumets, drip dispersion alumets in a dispersive medium, washing and heat treatment obtained gel-spheres, characterized in that obtained after dissolving aluminum metal in a strong acid almasol neutralized with a weak base, then treated with a strong mineral acid and evaporated.

2. The method according to p. 1, characterized in that as a weak base charge aqueous solution of ammonia and neutralizing lead to a pH of 7.0 to 8.0.

3. The method according to p. 1, characterized in that as a strong mineral acid, nitric acid, and evaporation of alumets spend up to molar ratio of the anion of the acid to aluminum is 0.7 to 1.3.


Same patents:

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FIELD: gas treatment catalysts.

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EFFECT: simplified manufacture technology and increased strength of monolithic cellular structure.

4 cl, 4 dwg, 1 tbl

Catalyst carrier // 2254921

FIELD: catalyst manufacture technology.

SUBSTANCE: invention relates to catalyst carriers used in various heterogeneous catalyst applications and as accumulator cells, galvanic and fuel cells, In particular, utilization of geyserite as catalyst carrier is described.

EFFECT: increased temperature and chemical stability of carrier.

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.

36 cl, 2 tbl, 22 ex

FIELD: composite materials.

SUBSTANCE: invention relates to catalyst carriers and methods for preparation thereof. Novel porous composite material particles are proposed comprising alumina component and swelled clay component finely dispersed in alumina component in amount effective to raise hydrothermal stability, pore volume, and/or pore mode in the mesopore region in composite material particles as compared to swelled clay-free material. Also proposed are composite material particles and agglomerate particles obtained therefrom as well as a method for hydroprocessing of petroleum feedstock using agglomerates as hydroprocessing catalyst carrier.

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44 cl, 24 dwg, 19 tbl, 28 ex

FIELD: production of carbon carrier for catalysts.

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EFFECT: enhanced economical efficiency; increased productivity of process.

3 ex