Comprehensive utilization method of waste residues generated in oryzanol production process

Abstract

The invention provides a comprehensive utilization method of waste residues generated in an oryzanol production process. The comprehensive utilization method comprises the following steps: 1) hot-melting; 2) performing alkali alcohol reflux hydrolysis; 3) performing cold precipitation separation; 4) performing solvent recovery and solid-liquid separation; 5) mixing a precipitate with siraitia grosvenorii residues to prepare a feed matrix; 6) extracting and refining a filtrate; 7) adjusting the pH value and decolorizing with resin; 8) performing acid precipitation separation; and 9) drying to prepare natural ferulic acid. According to the method, 2-6% of low-content oryzanol which is difficult to recycle in the waste residues is made into natural ferulic acid with the purity of 98% or above, and grease precipitate in the process is used as a raw material for preparing the feed matrix, so that comprehensive utilization of the oryzanol production waste residues is realized; waste residuesreflow and are saponified in solvent dissolution, the temperature is easy to control, the conversion efficiency is high, and damage is little; purification is realized through dissolution differenceof different systems and temperatures of alkali alcohol and alcohol water and alkali liquor extraction, , and decoloration is realized by resin only adsorbing pigment without desorption; waste is turned into valuable things, and the environmental protection problem that waste residues are difficult to utilize in oryzanol production is solved.

Description

Technical field [0001] The invention belongs to plant extraction and separation technology, and specifically relates to a comprehensive utilization method of waste residues produced during the production process of oryzanol. Background technique [0002] Oryzanol is present in rice bran oil and is a mixture of ferulic acid esters with triterpene alcohol as the main body. It mainly acts on the autonomic nervous system and endocrine center of the diencephalon, can adjust the autonomic nerve function, reduce endocrine balance disorders, and improve the symptoms of mental nerve disorders. It also has many physiological functions such as lowering blood lipids, lowering liver lipids, preventing lipid oxidation, and anti-oxidation. In addition, it also has the function of resisting arrhythmia, which can reduce the excitability of myocardium by regulating the function of autonomic nerves. The lipid-lowering effect of oryzanol can also improve the blood supply of the myocardium and play...

AI Technical Summary

Problems solved by technology

[0018] The above two patents are saponification reactions carried out in the non-dissolved state of the material. Since the material cannot be dissolved in the aqueous alkali solution, the contact area between the material and the alkaline water is limited. While part of the material is hydrolyzed, it is not contacted and protected by concentrated alkali. Part of the material is destroyed, which seriously affects the hydrolysis effect and conversion rate, and significantly increases the destruction rate

At the same time, when the concentrated alkali aqueous solution is heated by steam in production, it is often easy to heat up to 120 degrees, and there is a phenomenon that the temperature is too high and difficult to control, and the excessive temperature accelerates the destruction of oryzanol in the hydrolysis process