ИСТИНА

A strong size effect of selectivity and activity was revealed for Au-M containing catalysts during ethanol conversion into olefins C4-C8. The influence of impregnated metals concentration on aim fraction yield was studied. The opportunity of olefins C4-C8 fraction yield increasing was found due to addition of glycerol with amount not exceeding 20 vol.%. Conditions allow high selectivity conversion up to 85-92 % of ethanol into butanol-1, hexanol-1 and octanol-1 were found. Conversion rate of initial ethanol varied from 35 to 65 %. In the first time ever the reaction of β- alkylation of iso-propanol with ethanol over heterogeneous catalysts AuM/Al2O3 was carried out. During combined conversion of ethanol with isopropanol 3-methyl-2-butanol was obtained that is structural precursor of valuable monomer - isoprene. Catalysts genesis was investigated with use of XAS, XPS, TEM and EDS. The peculiarities of the reaction mechanism are discussed considering the specific surface and electronic features of the synthesized catalysts.