Method for refining rice bran oil by mixing crude rice bran oil refining technique

Abstract

The invention provides a method for refining blended rice bran oil by a refining process of mixed rice bran crude oil, belonging to agricultural and sideline products deep-processing, oil and fats refining technical field. The mixed rice bran oil is used as raw material. The proportion of oil to solvent is adjusted before completely evaporating to precipitate. The following steps are: degumming and depickling; evaporating the blended oil using conventional method; gas stripping and precipitating; finally decolorizing and deodorizing to obtain refined rice bran oil. All indexes of the refined rice bran oil are better than the indexed of traditional technique, especially the color and acid value of the rice bran oil is greatly improved, wherein the color (25.4mm) of the rice bran oil is Y36R2 and the acid value is 0.16, which satisfy the country primary standard of refined rice bran oil, namely the primary standard of color is <=Y35R3.5 and the primary standard of acid value is <=0.2. The refining rate is high and the oil content of nigre is low, respectively being 92.87% and 27.84%, but using the traditional technique, the refining rate is respectively 90.81% and 36.77%.

Description

technical field [0001] The invention discloses a method for refining rice bran oil by mixing crude rice bran oil refining process, which belongs to the technical fields of intensive processing of agricultural by-products and oil refining. Background technique [0002] Rice bran oil is oil made from rice bran, which has high nutritional value. The fatty acid ratio is in line with the best ratio of 1:1 oleic acid and linoleic acid recommended by the International Health Organization. Rice bran oil contains oryzanol, twenty-eight Alkanol, triacontanol, phytosterol and other functional ingredients can effectively reduce human serum cholesterol, prevent arteriosclerosis, hypertension and other cardiovascular system diseases. As a big rice producing country, my country's rice production accounts for one-third of the world's total production. Rice bran resources are very rich, with an annual output of 10 million tons, ranking first in the world. The potential annual output of rice ...

AI Technical Summary

Problems solved by technology

However, the domestic production of rice bran oil is less than 200,000 tons. This is mainly due to the high refining consumption of the traditional refining process. The prepared rice bran oil product has a darker color and higher acid value, and it is difficult to meet the national first-class standard for rice bran oil.

Although some studies have used secondary alkali refining, physical refining and other processes to reduce the acid value and color of rice bran oil, these methods consume a lot of energy and cost, and the physical and chemical indicators of the obtained products are still unsatisfactory.

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