TAILIEUCHUNG - Kinetic study of epoxidation of rubber seed oil using tungstate based catalyst
Experimental results showed that 60oC was the most suitable temperature for epoxidation reaction of both RSO and eRSO with the conversion of (RSO) and (eRSO), the yield of (RSO) and (eRSO) and the selectivity was (RSO) and (eRSO), respectively. | VNU Journal of Science: Natural Sciences and Technology, Vol. 34, No. 4 (2018) 16-20 Kinetic Study of Epoxidation of Rubber Seed Oil Using Tungstate-based Catalyst Nguyen Thi Thuy*, Nguyen Thanh Liem,Vu Minh Duc Polymer center, Hanoi University of Science and Technology, 1 Dai Co Viet Street, Hanoi, Vietnam Received 02 October 2018 Revised 20 November 2018; Accepted 04 December 2018 Abstract: By performing the reaction for one hour at three different temperatures, the thermodynamic properties of the epoxidation reaction using tungstate-based catalyst of ruber seed oil (RSO) and modified ruber seed oil (eRSO) were determined. The rate constant of these epoxidation reactions were varied from to with RSO and to with eRSO. The activated energies of reaction were and -1, respectively. The enthalpy ΔH was positive indicating that the epoxidation process was an endothermic reaction, but the free-energy ΔF was also positive, so there was a specific temperature at which the epoxidation process was the most effective. Experimental results showed that 60oC was the most suitable temperature for epoxidation reaction of both RSO and eRSO with the conversion of (RSO) and (eRSO), the yield of (RSO) and (eRSO) and the selectivity was (RSO) and (eRSO), respectively. Keywords: epoxidized rubber seed oil, kinetic, tungstate-based catalyst 1. Introduction are used as raw material for the synthesis of organic compounds [1]. At present, there are many new epoxidation methods in place of low efficiency traditional method such as ion exchange resins, metal catalysts, enzyme methods . [2]. In which, the metal catalyst is a method based on the mechanism of complex formation betweenmetals and oxidants, that minimizes side Epoxidized vegetable oils are very interesting because they are not only environmentally friendly but also be produced from natural renewable .
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