CATALYST, METHOD OF PREPARING SAID CATALYST AND METHOD OF PURIFYING OLEFINS Russian patent published in 2010 - IPC B01J23/44 B01J21/08 B01J37/02 C07C5/08 

FIELD: chemistry.

SUBSTANCE: described is a catalyst which contains 0.01-1.0 wt % palladium in form of particles with controlled size ranging from 1.5 to 20 nm, deposited on bidispersed silica gel. A method of preparing the palladium catalyst is described, which is characterised by that, a dried support which contains an alkali metal in amount of not more than 0.01 wt, bidispersed silica gel with specific surface area of 150-350 m²/g, total pore volume of 0.8-1.2 cm³/g with complete absence of micropores, volume of mesopores with radius of approximately 50 Ǻ 0.60-0.85 cm³/g and volume of macropores with radius of 1000-5500 Ǻ - 0.15-0.30 cm³/g, is impregnated with an aqueous solution of stabilised palladium nitrate at certain pH values, with subsequent drying, calcination in air and reduction. Also described is a method of purifying olefins from impurities of polyunsaturated hydrocarbons through catalytic hydrogenation in the presence of the catalyst described above.

EFFECT: increased degree of purity of olefins from polyunsaturated hydrocarbons up to 0,1 ppm, reduced loss of olefin material and prevention of formation of undesirable oligomers which lead to deactivation of the catalyst.

7 cl, 1 tbl, 4 ex