FIELD: chemistry.
SUBSTANCE: present invention relates to a catalyst system, a method of producing said catalyst system and use thereof in heterogeneous catalysis, especially in C-C cross-combinations and hydrogenolysis of glycerol. Catalyst system comprises a transition metal compound on a solid support, where the solid support is a surface-reacted calcium carbonate, which contains ground natural calcium carbonate (GNCC) or precipitated calcium carbonate (PCC) and at least one calcium salt insoluble in water, different from calcium carbonate. Surface-reacted calcium carbonate shows: (i) specific surface area of 15–200 m2/g, measured using nitrogen and BET method in accordance with ISO 9277:2010; (ii) Intrusion intraparticle pore volume in range of 0.1–2.3 cm3/g, calculated according to the measurement by mercury porosimetry; and (iii) a ratio of at least one water-insoluble calcium salt to calcite, aragonite and/or faterite in range of 1:99 to 99:1 by weight. Transition metal is selected from titanium, zirconium, ruthenium, palladium, silver, osmium, platinum, gold and mixtures thereof, and the transition metal compound is a transition metal molecular compound, transition metal salt, transition metal compound including elementary transition metal or transition metal complex. At least one calcium salt insoluble in water is defined as a calcium salt which, when 100 g of said salt is mixed with 100 g of deionised water and filtered on filter with pore size of 0.2 mcm at 20 °C for obtaining a liquid filtrate, gives not more than 1 g of recovered solid material after evaporation at 95–100 °C 100 g of said liquid filtrate at ambient pressure. Method of producing the catalyst composition involves the following steps: (a) obtaining at least one surface-reacted calcium carbonate, which contains ground natural calcium carbonate (GNCC) or precipitated calcium carbonate (PCC) and at least one water-insoluble calcium salt, different from calcium carbonate; (b) obtaining at least one transition metal compound and (c) contacting in liquid medium the surface-reacted calcium carbonate obtained in step (a) and the transition metal compound obtained in step (b), to obtain a mixture containing surface-reacted calcium carbonate and a transition metal compound.
EFFECT: technical result is higher catalytic activity.
14 cl, 6 tbl, 21 ex
