caa a22 4500 465796079 CHVBK 20180323112038.0 cr unu---uuuuu 170327e19900701xx s 000 0 eng 10.1007/BF02638958 doi (NATIONALLICENCE)springer-10.1007/BF02638958 Temperature effects on the extraction of rubber and melon seed oils [Elektronische Daten] [J. Ibemesi, J. Attah] Oils were extracted from the seeds of rubber [Hevea brasiliensis (Kunth) Muell. Arg.] and melon (Colocynthis vulgaris Schrad) using different solvents at varying temperatures. The objective was to determine temperature coefficients (n) for enhanced oil removal and the enthalpy changes accompanying the extraction process. Values of n, obtained from the slopes of the plots of the natural logarithm of equilibrium oil yield vs T/10, were on the order of 1.10, showing that oil, yield increased by a factor of about 1.10 for every 10° rise in temperature. Also, n values were used to predict oil yields at other temperatures by knowing the oil yield at a given temperature. Enthalpy changes (ΔH) in the extraction of both oils were determined using the Arrhenius equation. The ΔH values obtained were in the range of 4-13.5 kJ mol−1, indicating the physical nature of oil extraction by a solvent. American Oil Chemists' Society, 1990 Ibemesi J. Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Anambra State, Nigeria aut Attah J. Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Anambra State, Nigeria aut Journal of the American Oil Chemists' Society Springer-Verlag 67/7(1990-07-01), 443-445 0003-021X 67:7<443 1990 67 11746 https://doi.org/10.1007/BF02638958 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02638958 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ibemesi J. Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Anambra State, Nigeria aut NATIONALLICENCE 700 1- Attah J. Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Anambra State, Nigeria aut NATIONALLICENCE 773 0- Journal of the American Oil Chemists' Society Springer-Verlag 67/7(1990-07-01), 443-445 0003-021X 67:7<443 1990 67 11746 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer