Choice of solvents:
Good solubility of the oil
Poor solubility of non-oil components
High volatility (i.e. low boiling point), so that complete removal of the solvent
from the miscella and the meal by evaporation isfeasible and easy.
Low viscosity
Low heat of evaporation, so that less energy is
needed for solvent recovery
The solvent should be chemically inert to oil and other components.
Absolute absence of toxicity and carcinogenicity, for the solvent and its residues.
Non-inflammable, non-explosive.
Non-corrosive
Commercial availability in large quantities and low cost.
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