摘要：The objective of this research was to study the refining of calophyllum oils and its characterization as abiofuel substitute for diesel fuel.The dosage of phosphoric acid solution of 20% (0.2 - 0.3%) and the NaOHconcentration (14-18 °Be) were examined to determine the best performance of the refining process and thequality of refined calophyllum oil.The block experimental design and ANOVA (F-test at α = 0.05) were appliedto study the effects of dosage of phosphoric acid solution of 20% and NaOH concentration on oil loss and itsquality.Generally,the block and the NaOH concentration affected significantly the oil loss and the quality ofrefined oil.A significant increase of oil loss was observed as increasing of NaOH concentration.The dosage ofphosphoric acid solution did not affect the oil loss and the quality of refined oil.However,an increase of thedosage of phosphoric acid solution tended to decrease the ash content and viscosity of refined oil,but did notaffect any other parameters.The best treatment for calophyllum oil refining was obtained on the block 1,and thephosphoric acid solution dosage of 0.2% and NaOH concentration of 18 °Be.This treatment gave the oil loss of36.8%,the acid value of 0.23 mg NaOH/g,the saponification value of 174.93 mg KOH/g,the peroxide value of 7meq/kg,the ash content of 0.003% and the viscosity of 32.5 cP.The quality of refined calophyllum oil under this optimum condition fulfilled the Biofuel Standard.
其他摘要：Penelitian ini bertujuan untuk mempelajari pemurnian minyak nyamplung dan aplikasinya sebagai bahan bakar nabati.Faktor-faktor yang dipelajari adalah pengaruh dosis larutan asam fosfat 20% (0,2 - 0,3%) dan konsentrasi NaOH (14 – 18 °Be) terhadap loss miny
