The leftovers of the processed rice bran oil are used as the raw material for extraction. After n-hexane degreasing and decolorization, more than 80% of the edible ethanol is used to deodorize; then it is saponified twice with a sodium hydroxide aqueous solution of a certain concentration and temperature. Adjust the saponification liquid with dilute sulfuric acid and filter with suction; adjust the pH to 9-10 with dilute alkali for precipitation, and refine by ion exchange resin. After eluting impurities, it is desorbed with alkaline ethanol, decolorized and filtered; the filtrate is passed through a resin column to remove harmful metal ions The effluent is separated from ethanol by pervaporation membrane technology and the product is recrystallized. The crystalline product is washed with water, filtered by suction, and extracted and separated by vacuum drying to obtain a substance with a purity of greater than 98% and a variety of significant physiological activities-natural ferulic acid.
For related products, please visit our website：https://www.greenspringshop.com/standard-herb-extract/ferulic-acid.html