OP-II-3

THREE-PHASE DIRECT OILS HYDROGENATIONShtertser N.V., Minyukova T.P., Filonenko G.A., Khassin A.A.PP-III-63Boreskov Institute of Catalysis SB RAS, Prosp. Akad. Lavrentieva, 5, 630090,Novosibirsk, Russia, Fax: +7-383-3308056; E-mail: nat@catalysis.ruNovosibirsk State University, ul. Pirogova, 2, 630090, Novosibirsk, RussiaFax: +7-383-3302237Three-phase hydrogenation is one of the most effective ways of vegetable oilprocessing to produce fatty alcohols and hydrocarbons. Using copper containingcatalysts in the process of oil hydrogenation may be prospective because of its highactivity in hydrogenation reactions. It is well known that copper containing catalystsactivity and selectivity strongly depends on catalyst precursor composition andstructure, despite metallic copper particles are the active sites. Each catalyst isefficient in a peculiar hydrogenation process: Cu-Zn containing catalysts withwurtsite-like structure in methanol synthesis, Cu-Si containing with chrysocollastructure in hydrogenation of lactic acid to propanediol, copper chromite – in ketonehydrogenation to alcohols.Fatty acids triglycerides hydrogenation was carried out under pressure 2MPa inthe temperature range of 280-340°C using model catalysts which structures werethoroughly studied earlier: copper hydrosilicate ((Cu,H) 2 [Si 2 O 5 ](OH) 4 chrysocolla) [1],copper chromite (CuCr 2 O 4 tetragonal distorted spinel) [2] and a solid solution of Cu 2+in ZnO ((Сu,Zn)O wurtzite-like structure) [3].Our results allow suppositionthat hydrogenation of an ester groupof triglycerides occurs by threeroutes, which give (1) (ester of fattyacid and 1,2-propanediol) + fattyacid; (2) diglyceride + fatty alcohol;(3) diglyceride + aldehyde.The following steps arehydrogenation of acids to alcoholsand further – to hydrocarbons. Also,esterification reactions result in C 18 -C 3 and C 18 -C 18 esters formation.(Сu,Zn)O catalyst was found toSpecific yield, mole h -1 gcat -16,0E-035,0E-034,0E-033,0E-032,0E-031,0E-030,0E+00CuZn, 1.5g CuCr, 1.6g CuSi, 1g electrolytic copper ofPCMtriglyceride conversion99%triglyceride conversion92%triglyceride conversion74%paraffinolefinefatty alcoholestersfatty acidaldehydetriglyceride conversion75%Figure 1. Products distribution in the reaction oftriglyceride hydrogenation. T r =340°C, initialtriglyceride volume 21ml, reaction time 3h,hydrogen velocity 7l/h, P H2 =2MPa555