Efficient intermittent rice-bran-oil degumming technology

Abstract

The invention discloses an efficient intermittent rice-bran-oil degumming technology. The technology comprises: pumping rice-bran crude oil into an oil refining pot via an oil pump; heating, adding phosphoric acid with a concentration of 85% and stirring, so as to converse non-hydrated phosphatide in rice-bran crude oil into hydrated phosphatide; adding an alum solution accounting for 0.5%, so as to enable alum to dissolve in water in edible oil and generate aluminium hydroxide and phosphatide micelles through ionization, wherein aluminium hydroxide and phosphatide aggregates together and formed particles become bigger and bigger and precipitate in the bottom of the oil refining pot; and discharging from a pot-bottom valve of the oil refining pot. During flocculation of phosphatide, phosphatide floc includes a large amount of pigments and impurities and gives play to decolouring effect. By performing a plurality of times of water washing, phosphatide and other impurities in edible oil in the oil refining pot are removed. Degummed oil is sucked into a drying pot by vacuum suction force generated by a vacuum pump arranged in the system, and is subjected to water removing in vacuum environment and enters a subsequent cyclic decolouring process. Therefore, the odor-removing effect is realized without generating color reversion.

Description

Technical field: [0001] The product involved in the present invention relates to the technical field of removing peptization impurities and non-peptization impurities in rice bran oil in the refining process of edible oil. Background technique: [0002] As a healthy nutritional oil, rice bran oil is very popular in the international market; high cooking grade rice bran oil rich in oryzanol has been popular in developed countries such as Europe, America and Japan. Because rice bran crude oil contains other oil-soluble substances that are more complex and larger in quantity than other vegetable oils, the refining of rice bran oil is difficult and the neutral oil is seriously lost during the refining process. For rice bran oil with high acid value, the continuous physical refining method is basically still used. For rice bran oil with acid value above 40, the recovery rate of chemical refining and physical refining is very low, and the refining has no commercial value, but this...

AI Technical Summary

Problems solved by technology

The refining and degumming process is the beginning process of the whole refining process. The degumming effect of rice bran oil determines the effect of decolorization, deodorization, deacidification and winterization of the subsequent process, which directly affects the appearance and grade judgment of the final product oil; colloidal impurities contained in rice bran oil The most important ones are hydratable phospholipids and non-hydratable phospholipids, which are difficult to remove cleanly, resulting in the formation of new pigments that are difficult to remove during the deodorization process, resulting in the phenomenon of rice bran oil returning to color after deodorization

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