2017年8月20日星期日

what is refining, palm oil processing , palm oil refining, cooking oil refining mill,

The crude oil obtained either from expellers or solvent extraction plant contains impurities, which must be removed to make the oil edible, more palatable and stable against rancidity upon storage, the process of removing these impurities is called refining.
Impurities present in the oil

Gums, gums are phospholipids. There are two types of gums present, hydratable and non hydratable gums are removed during degumming steps.
Coloring matter, pigments such as chlorophyll carotene, anthophyll and gossypol, these color bodies which impart distinct color to the oil are removed during neutralizing and bleaching steps.
They are generally present in small quantities but their presence impart strong, sometimes objectionable odor to the oil. These substances are volatile in nature and removed by deodorization step.
Some oils like sunflower contains appreciable amounts of waxes. Waxed are high melting esters of fatty alcohol with long chain fatty acids. These are removed by dewaxing step.

Palm oil process mainly includes weighing, unloading fruit, sterilization, threshing, empty fruit bunches, digesting, pressing, fiber separation, kernel separation, clarification, oil transfer, water treatment, power house.

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