What’s the difference between hot pressing and cold pressing? Novice oil mill

One, cold pressed – cold extract – cold pressed finished oil

The cooked squeezing method has a high oil yield rate, the operation is simple, most oil mills in our country use hot squeezing. That is, before the oil is pressed, the oil is cleaned, broken and heated at high temperature, so that a series of changes occur inside the oil: damage the oil cells, promote the denaturation of protein, reduce the viscosity of oil, and then press the oil;   hot pressing and cold pressing

Cooked pressing for oil production, oil – cleaning – shell kernel separation -, drying and cooling, broken skin peeling, flaking, high temperature steaming and frying, high temperature crushing, fine filtration, cooked squeeze oil products  hot pressing and cold pressing

Two, the advantages of cold pressed refined oil

Cold pressing (raw pressing) process is mainly used for high-quality edible oil raw materials such as Perilla seeds, camellia seeds, walnuts, olives, etc. Because the whole process is carried out at low temperature, there will be no damage to nutrients by high temperature. In other words, nutrients in edible oil can be better retained, and the natural flavor and color of oil can be retained. The physiological active substance in the oil, biotin E, has anti-aging function, alcohol has skin-strengthening effect and enhance human metabolism function), cold pressed oil is original, is the choice of healthy life.

Three, cold oil shortcomings

Most oil and discomfort with cold pressed to soybeans, high erucic acid rapeseed, cottonseed, peanut, sesame, for example, soybean oil contains the bean smell, spicy in high erucic acid rapeseed oil, cotton seed oil the gaa toxins and metamorphic oil section of guide toxins were must pass a refined オ can be removed. And the fragrance of sesame oil and NongXiangHua source, must go through hot pressing process オ can get. The raw materials of the cold oil press must be selected, otherwise, due to the different maturity of the raw materials and the harmful contents in the section (such as: xanthotoxin in the oil shake and cottonseed cottontoxin), it will cause serious damage to the quality of cold oil press. Generally speaking, cold pressing has low smoke point, unstable water content, which is not conducive to long-term storage, relatively low oil yield, and high technical requirements for equipment.

Four, ripe oil advantages

Hot press (cooked press) process is mainly used for processing flavor edible oil such as peanut oil, canola oil, sesame oil, etc., after the oil is fried in the wok and then pressed, cooked press edible oil fragrance, flavor, especially sesame peanut this kind of rich is fragrant, the oil yield is higher than the cold press oil press;

Five, ripe oil shortcomings

After high temperature treatment of oil extract of wool oil Ting dark color, acid value increases, so the oil must be refined オ after edible. High temperature oil at the same time make the bioactive substances in oil, vitamin E, alcohols carrot ト element, etc.) in the process of crushing loss is very big, cause the waste of resources.

See here, we should also understand that these two ways of oil pressing have their own characteristics, for different oil, in the purchase of mechanical equipment, combined with their own choice is the best.