Refining method of rice oil

Abstract

The invention discloses a refining method of rice oil. The refining method comprises the following steps: degumming; primarily decoloring; primarily deacidifying; dewaxing; degreasing; secondarily deacidifying; secondarily decoloring and deodorizing, wherein the degumming step specifically comprises the following steps: carrying out reaction on heated crude oil and phosphoric acid in an acid reaction tank, then, adding alkaline liquor to mix for centrifugal separation, then, adding water to mix for washing centrifugal separation, and finally vacuum-drying; the primarily deacidifying step is physical deacidifying; the secondarily deacidifying step specifically comprises the following steps: quickly mixing heated oil with alkaline liquor for centrifugal separation, then, adding water for washing centrifugal separation, and finally vacuum-drying. According to the method, in the degumming and secondarily deacidifying steps, alkaline liquor is added to remove part of free fatty acids in grease, thus, not only is oryzanol remained, but also part of pigments can be adsorbed. In the degumming, primarily deacidifying and secondarily deacidifying steps, physical refining and chemical refining are organically combined, so that not only is oryzanol remained and the color reduced, but also the product yield is effectively improved.

Description

technical field [0001] The invention relates to an edible oil processing technology, in particular to a refining method of rice oil. Background technique [0002] Rice oil, commonly known as rice bran oil, is a product obtained by leaching the by-products of rice husk and germ during the whitening process to obtain crude oil, and then undergoing further physical or chemical refining. Because rice oil contains vitamin E, sterols, oryzanol and other substances, this oil has the functions of removing cholesterol in the blood, reducing blood lipids, and promoting human growth and development, and has become a nutritional and healthy oil recognized at home and abroad. What's more worth mentioning is that rice oil not only has the characteristic index of oryzanol, but the content of oryzanol in its crude oil is about 2.5%, and its fatty acid composition is reasonable, so it has attracted widespread attention from all over the world and has become the successor to sunflower oil. A...

AI Technical Summary

Problems solved by technology

The shortcomings of traditional physical refining are: high energy consumption, and at the same time, it is easy to produce trans fatty acids in the long-term high-temperature process, which is potentially harmful to human health

The shortcomings of the emerging small molecule distillation technology are: high equipment investment cost, low production capacity, and the content of benzopyrene in oil is not easy to remove, and benzopyrene is a strong carcinogen, which seriously threatens human health

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