4. Conclusion
This study demonstrated that the mass transfer model showed
a good fit with the experimental data for the oil extraction of coconut
waste using hexane and petroleum ether with R2 above 0.99.
The rate of extraction increases by 1.9% for soxhlet extraction using
hexane when the temperature (80 C) and solvent to solid ratio
(10:1) was increased. Increasing the temperature from 70 to
80 C; increases the yield by 2.3% for soxhlet extractor. Solubility
and density data showed hexane as a better solvent if compared
with the petroleum ether with more 1.3% oil yield for soxhlet
extractor. The mass transfer coefficients also increase with solvent
to solid ratio and temperature by 0.1% and 0.2%, respectively. Thi-