Which industrial technologies are used for vegetable oils’ refining?
The present review aimed at comparing the two main industrial technologies used for vegetable oils’ refining, namely, chemical refining and physical refining. Chemical refining removes free fatty acids by soda neutralization.
How to improve the quality of vegetable oil?
It is worth noting that some beneficial components are also removed, such as carotenoids (mainly including α- and β-carotene) and tocopherols (such as tocols and tocotrienols) . Thus, a moderate, focused refining process is very important to improve the quality of vegetable oil.
What are the preparation methods of vegetable oils?
Previous studies have demonstrated that the preparation methods of vegetable oils mainly include organic solvent extraction , , cold pressing and hot pressing , .
How are vegetable oils obtained?
Vegetable oils are obtained by mechanical expelling or solvent extraction of oleaginous seeds (soybeans, rapeseed, sunflower, etc.) or oleaginous fruit like palm and olive [ 2 ].