A method for preparing oryzanol from soapstock containing oryzanol

Abstract

The invention provides a method for preparing oryzanol by using soapstock containing oryzanol as a raw material, comprising the following steps: 1) hot melting with alkali and alcohol; 2) heat preservation fine filtration; 3) heat preservation ultrafiltration membrane separation; 4) heat preservation decolorization; 5) ) acidification neutralization and filtration; 6) washing; 7) drying. Wherein the temperature of step 1) to step 4) is controlled at 50-60°C. The present invention is characterized in that the heat preservation operation is performed at 50-60°C, and the specific process conditions of membrane separation, decolorization and washing are combined, and the final product is white powder. The purity of oryzanol is higher than 98%, and the yield is higher than 73%, reaching the purity The advantages of high yield and yield; the present invention does not use toxic or flammable and explosive organic solvents such as methanol, ether, hexane, solvent oil, etc., which improves the safety of product use and makes oryzanol meet export requirements; the production process is simple, The requirement for production equipment is low, and it is easy to operate and realize; the production cost is low, and it is suitable for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of plant extraction and separation, and relates to a method for preparing oryzanol, in particular to a method for preparing oryzanol by using soapstock containing oryzanol as a raw material. Background technique [0002] Oryzanol exists in rice bran oil and is a mixture of ferulic acid esters mainly composed of triterpene (en) alcohols. It mainly acts on the autonomic nervous system and endocrine center of the diencephalon, can adjust autonomic nervous function, reduce endocrine balance disorders, and improve symptoms of mental and nervous disorders. It also has various physiological functions such as lowering blood lipids, reducing liver lipids, preventing lipid oxidation, and anti-oxidation. In addition, oryzanol has recently been used as a raw material for skin care products and food antioxidants. Oryzanol is generally prepared by extracting oryzanol from soapstock rich in oryzanol-rich rice bran oil, b...

AI Technical Summary

Problems solved by technology

[0016] It can be seen that there are three main problems with oryzanol currently on the market: 1. Solvent residues exceeding the standard and using illegal solvents: mainly organic solvents such as methanol, ether, and hexane with residues, which prevent oryzanol products from being exported to Europe, America and Japan. Green export standards stipulate Export products are not allowed to use toxic solvents such as methanol in the production process; 2. The actual content of most oryzanol products does not meet the standard: although some commercially available products are white in color, their content is only about 95%. After analysis, it is known that these products produced in the production process. Some new degradable substances, although they are also white, reduce the oryzanol content, which is related to the production process; 3. The color of some oryzanol products does not meet the standard: although the product content reaches 98%, it often does not go through the decolorization step, making The color of this kind of product is off-white or off-white, light yellow and white, and the sales of this kind of product to Europe and the United States are restricted.