Rice bran is the by-product of rice processing, usually the production of rice bran actually consists of rice germ and rice bran, is edible grade rice bran, due to the processing of rice bran raw materials and the processing technology used is different, so the composition of rice bran is not exactly the same.
Generally speaking, rice bran contains 15% protein, 16%-22% fat, 3%-8% sugar and 10% water on average. Most of the main fatty acids in fat are unsaturated fatty acids such as oleic acid and linoleic acid, and contain high amount of vitamins, phytol, dietary fiber, amino acids and minerals. Therefore, rice bran can be further processed to extract relevant nutrients, such as combined with tofu dregs to extract riboflavin, calcium phytate, of course, rice bran can also be used to extract rice bran oil, rice bran oil is nutritious high quality cooking oil.
Because there are all kinds of enzymes in rice bran, among which there are a large number of fat oxidizing enzymes, so the nature of fresh rice bran is extremely unstable, easy to be rancid, we suggest that the newly harvested rice bran is best to refine the gross oil within 24 hours, or use the rice bran expander to prolong the time of freshness, the freshness period of the rice bran can be prolonged to 30 days after being treated by the rice bran expander, so that the subsequent production and processing is more flexible.
Rice bran after rice bran oil production line a series of processing we got fresh rice bran oil crude oil, but crude oil still contains all kinds of impurities, and all kinds of active enzyme, very easy to rancidity, so the refining of rice bran oil is very necessary, after the refining process to get the refining of rice bran oil is rich in cereal vitexin, cereal sterol, squalene, vitamins, all are every day of the antioxidant, so don't need to add the artificial synthetic Antioxidants, it will make the rice bran oil difficult to oxidize or rancidity.
Therefore, why does rice bran oil have a higher acid value? To be precise it should be the high acid value of the crude oil of rice bran oil.
