Key Technology Of Preparation For Rice Bran Inositol

Inositol has similar effect with biotin and vitamin B1,and is the indispensable ingredients in organism,or a kind of high value of chemical raw materials.In recent years,researchers develop a new field of application of inositol. inositol became one of popular chemical products in the international market. Rice bran is a by-product of agricultural product processing and one of the main raw materials.The paddy production is annual production of about200million tons. Rice bran accounts for about5%of the rice grain quality,accounts for about a third of the world total. United Nations Industrial Development Organization says rice bran is a kind of resource which has not fully been utilized. Although China is rich in rice bran resources, but they are not sufficiently developed and utilized.Rice bran did not fully play a role on resources benefits,social benefits and economic benefits.It makes a kind of resources waste.At present, Most of rice bran were used for feed and a few of them used for making rice bran oil in China.Defatted rice bran meals contains about10%phytin. Phytin with further processing can produce inositol.Inositol is widely used in medicine,food,feed,chemical and other industries,which greatly increased the added value of rice bran.This thesis takes defatted rice bran as research subject.The extraction for phytin from defatted rice bran is investigated. Fe2(SO4)3/γ-Al2O3solid acid catalyst is applied to phytin hydrolysis. Inositol quality which prepared with Fe2(SO4)3/γ-Al2O3solid acid catalyst is better.1. This article uses defatted rice bran as raw material to produce phytin with dilute acid extraction and alkali neutralization method to extract.The influence of material-to-liquid ratio,extraction temperature and extraction time were studied through Response Surface Methodology(RSM), and the optimum conditions were attained. The optimum conditions:material-to-liquid ratio was1:9(g/mL),extraction temperature is40℃extraction time was4h, yield of phytin was8.71%. We check over the index of phytin.2. A new catalyst which have the good effect was introduced in this thesis.The catalyst was prepared by volumetric impregnation method.After macerating, calcinating, drying processes,γ-Al2O3,as a vector,is prepared for Fe2(SO4)3/γ-Al2O3solid acid catalyst.3. Under ordinary conditions of pressure, aqueous solution of phytin is used to produce inositol though hydrolysis,filtering,crystallizing and drying,with boiling point solvent ethanediol as hydrolysis auxiliary and Fe2(SO4)3/γ-Al2O3, as catalyst.The procedures such as removing impurity,decoloring and concentrate are simplified.4. The influence of macerate mass concentration,macerate time and calcination temperature were studied through Response Surface Methodology,and the optimum conditions were attained.The optimum conditions:macerate mass concentration was50mg/mL,macerate time was4h,calcination temperature was 436℃.It not only simplify the production processes for inositol,but also improves the yield of inositol and production efficiency.It also promotes rational use of rice bran resources and reduces the energy consumption.The production of inositol processing enterprises will improve market position with this technology.