(1) Complete set of rice bran oil production process:
Rice bran→feeding→conveying→bran separation→expansion granulation→lifting conveying→extraction→crude oil
(2) Rice bran oil refining process
1. Chemical refining process of rice bran oil
Rice bran oil → degumming → alkali refining → decolorization → deodorization → dewaxing → filtration → refined rice bran oil
2, the physical refining process of rice bran oil
Rice bran oil → degumming → decolorization → deacidification and deodorization → dewaxing → filtration → refined rice bran oil
The acid value of crude rice bran oil is usually very high, usually 10 to 25 acid value, and the higher one reaches 30 to 40 acid value. It is difficult for ordinary chemical refining methods to meet the economic requirements of processing. Using the rice bran oil physical refining process, the processing loss is small, the product oil yield is high, and the by-product of mixed fatty acid can be directly obtained.
The physical refining method of rice bran oil uses steam distillation. That is, the rice bran oil is an operation process in which the FFA in the oil is brought out by spraying clean water vapor into the oil under the conditions of high vacuum and high temperature.
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