Nanik Wijayati, N. Hidayah, Sri Mursiti, Ella Kusumastuti
Alpha-pinene compound can be derived into α-terpineol. The high content of this compound in turpentine oil will increase their selling value. Formation of α-terpineol by turpentine hydration reaction occurs with the aid of a catalyst. The catalyst can be derived from combination of homogenous and heterogeneous catalyst, namely phosphoric acid and activated natural zeolite (P2O5-natural zeolite). Characterization of P2O5-natural zeolite catalyst includes crystallinity analysis with XRD, functional group analysis with FTIR and acidity analysis with the gravimetric method. Hydration reaction was carried out in a batch reactor with variations of time (120, 240, 360, 480 minutes) and catalyst types (H3PO4, H-natural zeolite, P2O5-natural zeolite). Hydration reaction product were analysed using FT-IR, GC, and GC-MS. The result show that modification of catalyst by developing P2O5 is not significantly affected the crystalline structure of the H-natural zeolite. Hydration reaction reach optimum condition on the use of catalyst with H3PO4 10% and P2O5-natural zeolite 40%, while reaction time 480 minutes' yield α-terpineol selectivity of 61,81% and 5,25% respectively. © 2019 Published under licence by IOP Publishing Ltd.
Department of Chemistry, Faculty of Mathematics and Natural Sciences, State University of Semarang, D6 Building, Sekaran Campus, Gunungpati, Semarang, Indonesia
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