At present the industrial production of edible oil only "press law" and "extraction" two.Pressing method is by physical oil press machinedirectly from the separated oil; extraction rules using organic solvent oil out of raw materials extraction, after the "six off" to remove the solvent, the national standard allows a limited solvent residue. Tell thepress method more natural theory, leaching yield higher. There is also a supercritical extraction method laboratory, using carbon dioxide extraction, this method is the most advantage, the industry is generally used only for extracting essence, essential oils,haven't seen in edible oil.
cold oil press, hot pressing are pressing method, oil crops, oil rate is high after heating (like fried peanuts more fragrant), so the heat pressing is common practice within the industry. In recent years, oil heating (or repeated heating) effects some demonized, therefore, only enterprises using cold pressing this concept, but the cold pressing is to control the temperature in a certain range, much impact on oil, or cold pressing, hot pressing in edible oil, nutrition security differences there is no difference, and exact description and remarkable, after all, the national standard of edible oil to squeeze method is an index.
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