C - Chemistry – Metallurgy – 01 – F
Patent
C - Chemistry, Metallurgy
01
F
252/40
C01F 7/02 (2006.01) B01J 2/06 (2006.01) B01J 21/02 (2006.01) B01J 21/04 (2006.01) B01J 21/12 (2006.01) B01J 35/08 (2006.01) B01J 37/02 (2006.01)
Patent
CA 1297091
ABSTRACT OF THE DISCLOSURE This invention relates to the preparation of small spheroidal solid agglomerates. More particularly, the process produces strong solid spheroidal agglomerates containing alumina or a mixture of alumina and at least one other inorganic material, which process comprises: (a) mixing at high speed a portion of alumina or a mixture of alumina and at least one other inorganic material in the form of hydrophilic micron-sized particles in a water-immiscible liquid thereby forming a dispersion; (b) gradually adding to the dispersion an aqueous acidic phase while continuing the high-speed mixing until substantially spherical micro-agglomerates form within the water-immiscible liquid; (c) subjecting the micro-agglomerates to agitation in a vessel having a hydrophobic inner surface at a speed low enough to achieve substantially uniformly sized spheroidal agglomerates; (d) drying the agglomerates to produce hardened spheroidal uniformly sized agglomerates; and (e) optionally further separating the agglomerates by size. Optionally, the aqueous phase in step (b) may include the soluble salts of catalytic metals, and bases and/or colloidal-sized inorganic particles. These spheroidal particles can have either smooth surfaces or polylobe surfaces depending on the conditions of prepara- tion. They have diameters generally between 1 to 5 mm and are useful as catalysts, or catalyst supports Catalytic components may subsequently be deposited on the support.
540904
Chevron Research And Technology Company
Rainis Andrew
Smart & Biggar
LandOfFree
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