Cotton seed oil is the main edible oil. But crude cottonseed oil containing gossypol content of about 1%, resin and wax (in view of oil and cotton embryo containing shell varies), poor quality, not direct human consumption,
cottonseed oil refining process is fairly complex.
Refined cottonseed oil technology introduction: filtration of crude oil → preheating → oil and alkali dosing → mixing reaction → soap → washing → dehydration → drying → boiled cotton oil removal
Operating conditions: filtering hair oil impurity is less than 0.2%, alkali concentration 20 ~ 28 ~ B, excess base as the theoretical base of 10% ~ 25%, soap removal temperature 70 to 95 DEG C, drum washing water dosage of 25 ~ 1001/h, inlet oil pressure 0.1 ~ 0.3 MPa, oil back pressure of 0.1 to 0.3 MPa, washing temperature of 85 to 90 DEG, washing water addition is to 15% of 10% of the amount of oil, dehydrated back pressure 0.15Mpa, drying temperature of not less than 90 DEG C, absolute pressure 4.0kpa operation, refined oil filtration temperature is not higher than 70 DEG C.
Refined edible oil refining process of crude oil filter through preheating, mixing, mixing oil and alkali dosing, mixing, reaction, removal of soap
Operation points: alkali refining of operating conditions with crude oil refining, complex refining alkali concentration ranged from 6 to 12 degrees, adding amount of oil amount of 1% ~ 3% and annealing temperature of 70 to 90 DEG C, oil pressure 0.15 MPa. Washing, decolorization, removing stink, operating conditions and peanut oil refined edible oil operating conditions similar. If in the removal of odor after degreasing and grade of the refined oil for refining buffet oil (salad).
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