Cottonseed oil is cooking oil from the seeds of cotton plants of various species, mainly Gossypium hirsutum and Gossypium herbaceum, that are grown for cotton fiber, animal feed, and cooking oil.
Cottonseed oil refining machine
Processing of the cottonseed oil refining machine workshop:
Crude cotton seed oil –filter–hydration–dry degumming –decolorization –physical refining –deacidification–deodorization→ refined cotton seed oil.
1. Degumming and deacidification: The gumming is moved by phosphoric acid and hot water.There are two ways to move the acid in the oil. One is chemical way, the other one is physical way. The chemical way is using NaOH to react with acid. This way is suitable for the capacity of 5-30T per day. The physical way is using steam and centrifugal to move the acid. This way is used for capacity from 30-2000T per day.
2. Deacidification ( neutralization): In this step free fatty acids are neutralized by using sodium hydroxide and convert them into soap. Additional impurities are also removed by adsorption on soap.
3. Decolorization : During decolorization, unwanted pigments are adsorbed physically and oil will become much clearer.
4. Deodorization: Deodorization is used to remove unacceptable odors by steam distillation, the odoriferous compound are stripped off with the help of live injected steam into heated oil under high vacuum pressure.