Hot pressing process and cold pressing process which is better?
In recent years, with the improvement of people's living standards, more and more people of all ages in terms of cold edible oil extraction. Cold oil extraction is in front of the press without heating oil or low state, into the screw press press. Squeeze lower oil temperature, acid value is low, generally do not need refining, after precipitation and filtration to obtain refined petroleum products.
Advantages cold pressing process: cold-pressed oil is produced in a production process. Usually cold pressing method at a temperature below 60 ℃ environment for processing, the most complete nutrient retention. Because cold-pressed oil law was only half hot pressing method, so most cold pressed about the price to be higher than the thermal oil extraction 50%. The cold-pressed oil out because there was no damage, generally do not need to add an additive, it can save time. Relatively high market capitalization value. Cold oil extraction has natural properties, to avoid the adverse effects of conventional oil extraction process produces a high temperature. Cold-pressed oil refined oil retained in natural flavor and color, complete preservation of the oil physiologically active substances (vitamin E has anti-aging functions, sterols have healthy skin function and enhance the body's metabolic functions), cold oil extraction authentic, is to choose a healthy life. But most are not suitable for cold-pressed oils, soybeans, high erucic acid rapeseed, cottonseed, peanuts, sesame seeds, for example, beany soybean oil contains high erucic acid rapeseed oil spicy flavor, cottonseed oil in gossypol toxin and aflatoxin deterioration of oil, etc., must be refined to remove. And the smell of sesame oil and peanut flavor, it must go through to get hot pressing process. Cold oil extraction of raw materials must be carefully selected, otherwise due to different maturity and raw materials contained harmful substances:...