Keyword : solvent fractionation 

Solvent fractionation is a process involving the crystallization of a desired fraction from a mixture of triglycerides dissolved in a suitable solvent. Fractions may be selectively crystallized at different temperatures after which they are separated and the solvent removed. The two common solvents used are hexane and acetone. Cooling is done by chilled water, or if very low temperatures are desired, brine. The olein/stearin fractions are separated by a process of filtration.