CN102464696A - Process for extracting oryzanol from rice bran - Google Patents

Abstract

The invention relates to a process for extracting oryzanol from rice bran, which comprises the steps of adding methanol into raw rice bran oil, adjusting the pH value by using sodium hydroxide, heating, keeping the temperature, stirring, cooling, standing, layering, and discharging a lower oil phase; adding citric acid into the upper methanol solution to adjust the pH value to 7, standing, filtering and taking precipitate to obtain a crude product; recrystallizing with hexane, washing, and drying to obtain refined product. The vitamin obtained by the invention has simple preparation, low cost and high purity, and can be widely used in food additives and antibacterial agents.

Description

From rice bran, extract the technology of thiaminogen

Technical field

The present invention relates to a kind of extraction process.

Background technology

Paddy is China's the 1st generalized grain kind. produces per year at present about 1.85 hundred million t.Account for 42% of national total output of grain.Rice yield accounts for 37% of total output of grain in the world.Paddy will remove shell and the kind skin and the embryo that account for gross weight about 10% in being processed into the process of polished rice, rice bran is processed into by kind of skin and embryo, is the main sub product of paddy processing.Domestic and international research result and data show, are rich in various nutrient substances and physiologically active substance in the rice bran.

In general, on average contain protein 15% in the rice bran, fatty 16%-22%, sugared 3%-8%, moisture 10%, heat is approximately 125.1KJ/g.Lipid acid main in the fat is unsaturated fatty acidss such as oleic acid, linolic acid mostly, and contains a large amount VITAMINs, pohytol, food fibre, amino acid and mineral substance etc.Therefore, rice bran can pass through further processing and extract relevant nutritive ingredient, extracts vitamin G, phytic acid ca as share with residue from beans after making, and rice bran can be used for squeezing Rice pollard oil.Defatted rice bran can also be used to preparing phytic acid, inositol and secondary calcium phosphate etc.; The tiny color of rice bran particle is yellowish.Be convenient to add to and bake and bank up with earth in food and other rice bran nutrient fortified foods; Simultaneously because soluble fiber content is low.Rice wax, oryzanal and a mouthful Sitosterol in the rice bran all have the effect that reduces blood cholesterol levels.The interpolation of rice bran raw material such as instead of corn in the animal animal and fowl fodder reduces feed cost and increases economic efficiency.Further utilizing of rice bran is significant.Thiaminogen is a kind of medicine, is used to treat cerebral concussion sequela, periodic psychosis etc., also can be used as foodstuff additive, and has a wide range of applications at aspects such as makeup, antiseptic-germicide and feeds.From rice bran, extract thiaminogen and can reduce cost.

Summary of the invention

The purpose of this invention is to provide a kind of technology of from rice bran, extracting thiaminogen.

The technical scheme that the present invention takes is:

From rice bran, extract the technology of thiaminogen, step is:

(1) the hair oil extracted from rice husks is dropped in the pot, add the methyl alcohol of 6-8 times of volume, regulate PH=10-11 with sodium hydroxide, be heated to 35～40 ℃, insulated and stirred 1-2 hour, the cooling standing demix was emitted lower floor's oil phase;

(2) in the methanol solution of upper strata, add the 10-15% Hydrocerol A and regulate PH to 7, leave standstill, the leaching deposition gets bullion;

(3) use the hexane recrystallization, through washing, the dry elaboration that gets.

The dimension paddy that the present invention obtains is plain makes simply, and cost is low, and purity is high, can be widely used in foodstuff additive, the antiseptic-germicide.

Embodiment

Embodiment 1

From rice bran, extract the technology of thiaminogen, step is:

(1) the hair oil extracted from rice husks is dropped in the pot, add the methyl alcohol of 6 times of volumes, regulate PH=10, be heated to 35 ℃ with sodium hydroxide, insulated and stirred 2 hours, the cooling standing demix is emitted lower floor's oil phase;

(2) in the methanol solution of upper strata, add 10% Hydrocerol A and regulate PH to 7, leave standstill, the leaching deposition gets bullion;

(3) use the hexane recrystallization, through washing, the dry elaboration that gets.

Embodiment 2

From rice bran, extract the technology of thiaminogen, step is:

(1) the hair oil extracted from rice husks is dropped in the pot, add the methyl alcohol of 8 times of volumes, regulate PH=11, be heated to 40 ℃ with sodium hydroxide, insulated and stirred 1 hour, the cooling standing demix is emitted lower floor's oil phase;

(2) in the methanol solution of upper strata, add 15% Hydrocerol A and regulate PH to 7, leave standstill, the leaching deposition gets bullion;

(3) use the hexane recrystallization, through washing, the dry elaboration that gets.

Claims (1)

1. from rice bran, extract the technology of thiaminogen, it is characterized in that step is:

(1) the hair oil extracted from rice husks is dropped in the pot, add the methyl alcohol of 6-8 times of volume, regulate PH=10-11 with sodium hydroxide, be heated to 35～40 ℃, insulated and stirred 1-2 hour, the cooling standing demix was emitted lower floor's oil phase;

(2) in the methanol solution of upper strata, add the 10-15% Hydrocerol A and regulate PH to 7, leave standstill, the leaching deposition gets bullion;

(3) use the hexane recrystallization, through washing, the dry elaboration that gets.