PEMBUATAN MINYAK KEMIRI DAN PEMURNIANNYA DENGAN ARANG AKTIF DAN BENTONIT (Extraction and purification of candlenut oil with activated charcoal and clay-bentonit) Oleh / by : Saptadi Darmawan Abstract Candle nut oil extraction can be applied in a simple and easy way. Preheating treatments on either the whole seed or the nut prior to pressing the nut in the oil extraction process, as well as the use of activated charcoal and bentonit in the purification process are believed to affect the quality of the oil. The aims of this investigation were 1) to know the effect of preheating on the yield and colour of the oil; and 2) to know the effect of type and concentration of the oil purifier (activated charcoal and bentonit) on physico-chemical properties of the oil. Preheating treatments tested were solar drying (3, 4, and 5 hours), heating (7.5, 12.5, and 17.5 minutes) and oven drying at 60 0 C (1, 1.5, and 2 hours), tested the concentration of both activated charcoal and bentonit i.e. 2, 3 and 4%. Oil extraction was conducted in hydraulic press at 60 0 C. Result show that the best preheating treatment was heating in 1.5 hours, following by purification with 2% activated charcoal gave optimum physico- chemical qualities to fulfil the Indonesian National Quality Standard’s specific gravity, refraction index, iodine number and acid number. Key words : Candle nut oil, purification, activated charcoal, bentonit, physico- chemical qualities.