Another method of oil recovery from the retaining component of the fruit is via solvent extraction. For example the separated pressed fiber described in the “Modern and Traditional Methods of Oil Recovery from the Retaining Components, Pressing” section of this chapter can be extracted with a solvent rather than pressing a second time. Again, oil can be recovered from POME by the addition of solvent such as food grade hexane or petroleum spirit with the aid of soxhlet extraction (Ahmad et al., 2008; Bassim et al., 2003). And because of the high solubility of oil in these highly volatile and inflammable non-polar solvents, it will extract more oil than pressing. However, the POME has to be pretreated by filtration and drying in order to remove water, and this will definitely add to the cost palm oil production. The health and safety considerations as well as huge investment in infrastructure, therefore, may be a huge disincentive to this method of oil recovery (Corley & Tinker, 2003), especially the rural processors.
Another method of oil recovery from the retaining component of the fruit is via solvent extraction. For example the separated pressed fiber described in the “Modern and Traditional Methods of Oil Recovery from the Retaining Components, Pressing” section of this chapter can be extracted with a solvent rather than pressing a second time. Again, oil can be recovered from POME by the addition of solvent such as food grade hexane or petroleum spirit with the aid of soxhlet extraction (Ahmad et al., 2008; Bassim et al., 2003). And because of the high solubility of oil in these highly volatile and inflammable non-polar solvents, it will extract more oil than pressing. However, the POME has to be pretreated by filtration and drying in order to remove water, and this will definitely add to the cost palm oil production. The health and safety considerations as well as huge investment in infrastructure, therefore, may be a huge disincentive to this method of oil recovery (Corley & Tinker, 2003), especially the rural processors.
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