EXTRUDATE-SHAPED CATALYST Russian patent published in 2000 - IPC

FIELD: catalyst production technology. SUBSTANCE: catalyst consists of inert binding material selected from boehmites or pseudo-boehmites and aluminosilicate gel whose preparation involves following steps: (i) preparation of aqueous solution of tetraalkylammonium hydroxide, that of soluble aluminum compound as aluminum oxide precursor upon hydrolysis, and that of silicon compound as silicon oxide precursor upon hydrolysis taken in following molar proportions: SiO₂:Al₂O₃ (30-500): 1, tetraalkylammonium hydroxide : SiO₂ (0.05-0.2): 1, and H₂O:SiO₂ (5-40):1; (ii) heating of solution obtained to incite hydrolysis and gel formation to form mixture with viscosity from 0.01 to 100 PaS; (iii) addition of binding agent to above mixture at weight ratio (0.05-0.5): 1 followed by adding mineral or organic acid in amounts from 0.5 to 8 g per 100 g of binder; (iv) agitation and heating of resulting mixture at 40 to 90 C to form homogeneous paste that is then subjected to extrusion; (v) drying of extrudate; and (vi) calcination of dry extrudate in oxidative atmosphere. EFFECT: increased strength and activity of catalyst. 2 cl, 1 dwg, 4 tbl, 6 ex