PEMBUATAN MINYAK KEMIRI DAN PEMURNIANNYA DENGAN ARANG AKTIF DAN

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 bentonite in the purification process are believed to effect 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 bentonite) on physico-chemical properties of the oil. Preheating treatments tested were solar drying (3, 4, and O 5 hours), heating (7.5, 12.5, and 17.5 minutes) and oven drying at 60 C (1, 1.5, and 2 hours), tested the concentration O of both activated charcoal and bentonite i.e. 2, 3 and 4%. Oil extraction was conducted in hydraulic press at 60 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 meet the Indonesian National Quality Standard's specific gravity, refraction index, iodine number and acid number.