Abstract
The effect of moisture content, heating temperature, heating time, applied pressure and duration of pressing on the yield of oil expressed from conophor nuts were investigated. In general, the oil yield at any pressure was dependent on the moisture content of the sample after heating, heating temperature and heating time. High oil yields were obtained from samples with moisture contents between 8 and 10% after heating. The maximum oil yield of 39·6%, corresponding to an extraction efficiency of 66% was obtained when milled conophor nut conditioned to 11% moisture was heated at 65°C for 28 min and expressed at a pressure of 25 MPa. Oil expressed under this condition was of good quality with a free fatty acid value of 1·18%.
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