Crude shea butter obtained from the extraction process undergoes many refining steps. The process of how to refine shea butter begins with pretreatment and bleaching, which is followed by deodorisation and deacidification to obtain refined shea butter.
What is a shea nut kernel?
The kernel is the oil-bearing material that can be obtained by processing the shea nut fruit. The fruit primarily undergoes several processes – de-pulping, boiling, drying, deshelling, winnowing and sorting – to obtain the kernel from which the shea butter is extracted. Mechanical processing technology
How is shea butter extracted?
Extraction of shea butter from shea kernels can be done via either water extraction i.e. boiling with water, mechanical extraction, solvent extraction, or a combination of these processes. The traditional method of how shea butter is made involves water extraction – boiling the shea kernels with water and skimming off the released oils.
How is shea butter fractionated?
Once refined, shea butter can be fractionated into two parts: a creamy fat known as shea stearin and a liquid oil called shea olein—otherwise known as shea oil. Fractionation separates these two unique components using either a chemical reagent or physical methods like centrifugation.
Does shea butter need solvent extraction?
For these reasons, solvent extraction is generally not preferred for shea butter extraction—especially in food and cosmetic markets where consumers seek natural, organic ingredients. What is shea oil? Traditional water extraction, mechanical expeller pressing, and solvent extraction yield shea butter.
How are shea nuts processed?
Subsequently, the nuts are processed by boiling, roasting, or sun-drying. Boiling in water prevents the shea seeds from germinating and prevents hydrolytic degradation of the extracted shea butter. The boiled shea nuts are sun-dried, and then the dried shea nuts are cracked to obtain the kernels.