The comparison between oil extraction after 8 h in acetone and oil extraction after 24 h in isopropanol with the corresponding extraction periods shown in Table 5 for hexane showed that the
oil yield from hexane extraction was 8.7% more than the oil yield from acetone extraction after 8 h, and the oil yield from hexane extraction after 24 h was 10.5% more than the oil yield from isopropanol after 24 h.