ligroin enhances recrystallization by forming polar bonds.
octanol is more lipophilic (like more lipids) lipids are waxy solids, not crystalline solids. Ethanol is better at dissolving polar crystalline solids than octanol.
An impure chemical can be cleaned up in a solvent by recrystallization, sometimes referred to as fractional crystallization. The purification process is predicated on the idea that most solids become more soluble at higher temperatures.
Re-crystallization is a method for removing impurities from solid substances.
1 Hot liquid tends to make solids more soluble than cold liquids. Recrystallization involves dissolving an impure solid chemical in a hot liquid until the solution reaches saturation, at which point the liquid is allowed to cool.
2 The result should be relatively pure crystals of the chemical. Ideally, any contaminants will be kept in the solution and won't be incorporated into the crystals as they grow. The crystals can then be filtered out of the solution. Some of the chemicals will remain in the solution and be lost; not all of them can be recovered.
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