Parametric Study on Solvent Extraction of Oil from Petroleum Nut (Pittosporum resiniferum Hemsl.) using Cyclohexane as Solvent

Author : Eduba, Mary Chie Tayam
Major Adviser : Borines, Myra G. 
Committee Members : Movillon, Jovita A.; Guerrero, Gino Apollo M.; Bambase Jr., Manolito E. 
Year : 2016
Month : June
Type : Thesis
Degree: BS
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The solvent extraction of petroleum nut oil by soaking method using cyclohexane as solvent was investigated. The petroleum nuts used were without the seed, dried, and size-reduced to an upper limit of 0.5 cm. The effects of three parameters namely temperature, solvent-to-nut ratio, and soaking time on oil yield were determined. High and low level values were used: 40 °C and 60 °C, 2:1 v/w and 5:1 v/w, and 8 hr and 16 hr, for the temperature, solvent-to-nut ratio, and soaking time, respectively. A centerpoint (50 °C, 3.5:1 v/w, 12 hr) was also set. Three trails were done for each combination of parameters. The factors that had significant effects on oil yield were determined to be solvent-to-nut ratio, interaction of temperature and solvent-to-nut ratio, interaction of temperature and soaking time, interaction of solvent-to-nut ratio and soaking, and the interactions of the three parameters. The highest oil yield (w/w) was 9.29 ± 0.35% which was found at 40 °C, 5:1 v/w, 16 hr. Soxhlet extraction was also performed to determine the maximum extractable oil. The condition used was 180 °C, 18:1 v/w, and 12 hr. The result was found to be 22.97%. For comparison, the oil of fresh petroleum nuts was also extracted. Two conditions were performed: 60 °C, 5:1 v/w, 16 hr and 40 °C, 2:1 v/w, 8 hr. The oil obtained were 2.63 ± 0.09% and 1.90 ± 0.42%, respectively. Comparing the physical characteristics, the oil extracted from the fresh have stronger and more distinct odor and darker.

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