III International Conference

PP-II-159At the same time, catalysts containing 4-6 wt% of boria provide 70-80 % conversionlevel of butenes with octenes content in С5+ products equal to 50-60 wt%. Using of sulfatespecies as modifiers gives the similar results. However, sulfated systems are much less stablein hydrogen and water steam conditions due to theirs reduction and hydrolysis.Introducing of zirconia makes the number of surface acid sites of borated aluminacatalysts 1.3-1.4 times higher, what is confirmed by infrared spectroscopy and catalytic tests.The most active catalysts are formed by supporting of 15 wt% of zirconia on alumina.Testing of bifunctional borated alumina-zirconia catalysts obtained after forming ontheirs surface of particles of metallic palladium in hydrooligomerization of butenes withhydrogen input showed the possibility of forming С5+ isoalkanes, similar to those, obtainedin traditional alkylation of isobutane with butenes (Fig. 1).Supercritical conditions (150-200 °С, 40-80 atm) with respect to initial reactants(butenes) are determined as optimal for hydrooligomerization of butenes. Such conditionsprovide the highest activity and stability (more than 20 hours) of studied catalysts due to theextraction properties of supercritical reaction medium.This work was supported by the Lavrentiev Grant Of Young Scientists SB RAS №72.459