Method for preparing acid oil from rice bran oil nigre

Abstract

The invention discloses a method for preparing acid oil from rice bran oil nigre. The method comprises the following steps: S1, nigre feeding: feeding nigre into a homogenizing tank until the nigre in the homogenizing tank is filled to a preset height; s2, dispersing and recombining: turning on a heater to heat the nigre, turning on a circulating pump to pump the nigre in the homogenizing tank into a jet drainage device, and jetting the nigre to a dispersing turntable through the jet drainage device to be scattered and recombined; s3, acidification reaction: starting a conveying pump to pump the nigre in the homogenizing tank into a feeding tank, and introducing sulfuric acid for acidification reaction to obtain a mixed solution; s4, standing separation: guiding the mixed liquid into an oil-water separation tank, standing for more than 2 hours, layering the mixed liquid up and down to obtain acidified oil, and finally extracting the acidified oil to complete preparation. The soapstock can be effectively homogenized by opening the circulating pump and the spraying drainage device to spray the soapstock onto the dispersing turntable to be dispersed and recombined, so that the subsequent sulfuric acid and the soapstock can quickly and thoroughly react.

Description

technical field [0001] The invention relates to the field of acidified oil preparation, in particular to a method for preparing acidified oil from rice bran oil soapstock. Background technique [0002] Crude rice bran oil can be obtained from rice bran after pressing and solvent leaching, and the main components of crude rice bran oil are rice bran oil, free fatty acids, oryzanol and bran wax, etc. Therefore, when the factory produces oryzanol, it will add alkali to the crude rice bran oil, Thereby neutralizing the free fatty acid in crude rice bran oil and generating soapstock, and then acidifying the soapstock to obtain acidified liquid containing fatty acid and waste water containing sodium sulfate, while oryzanol remains in the fatty acid. [0003] The existing method for preparing acidified oil from rice bran oil soapstock is generally an intermittent acidification method. The soapstock is passed into the acidification tank, first returned to the water vapor, then added...

AI Technical Summary

Problems solved by technology

However, the overall process of the method for producing acidified oil takes 6 hours, and about 10 tons of soapstock can be processed each time, and the production efficiency is relatively low.

And because the distribution of sodium ions in the soapstock is not uniform, in order to ensure that the reaction can be fully carried out, it often takes a long time to stir the reaction, so that the time required for the reaction becomes longer and the production efficiency is seriously reduced.

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