OLEFIN EPOXIDATION CATALYST CARRIER AND A METHOD FOR PREPARATION THEREOF Russian patent published in 2006 - IPC B01J21/04 B01J21/12 B01J32/00 C07D301/10 

FIELD: organic synthesis catalysts.

SUBSTANCE: invention relates to creating carriers for catalysts used in epoxidation of olefins and provides catalyst containing at least 95% α-alumina with surface area 1.0 to 2.6 m²/g and water absorption 35 to 55%, and which has pores distributed such that at least 70% pore volume is constituted by pores 0.2 to 10 μm in diameter, wherein pores with diameters 0.2 to 10 μm form volume constituting at least 0.27 ml/g of carrier. Also described is a method for preparing catalyst carrier, which envisages formation of mixture containing 50-90% of first α-alumina powder with average particle size (d₅₀) between 10 and 90 μm; 10-50% (of the total weight of α-alumina) of second α-alumina powder with average particle size (d₅₀) between 2 and 6 μm; 2-5% aluminum hydroxide; 0.2-0.8% amorphous silica compound; and 0.05-0.3% alkali metal compound measured as alkali metal oxide, all percentages being based on total content of α-alumina in the mixture. Mixture of particles is then calcined at 1250 to 1470°C to give target carrier.

EFFECT: increased activity of catalyst/carrier combination and prolonged high level of selectivity at moderated temperatures.

21 cl, 3 tbl