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Aqueous enzymatic method for extracting organic rice bran oil

A technology of rice bran oil and water enzymatic method, which is applied in the direction of fat oil/fat production, fat oil/fat refining, fat production, etc. It can solve the problems of high enzymatic hydrolysis temperature, difficulty in breaking emulsion, reducing oil-water interfacial tension, etc., and achieve high extraction rate , The effect of simple process

Inactive Publication Date: 2015-10-28
YANGXIAN YONGHUI AGRI IND DEVCO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this patented technology is that its process will cause a certain decline in rice quality. In addition, brown rice has a high starch content, strong adhesion, difficult demulsification, and is not good for oil extraction; The points are not described in detail, and there are blind spots in the implementation
The disadvantage of this technology is that the enzymolysis temperature is 60°C, which is high enough to reach the starch gelatinization temperature in rice bran, and the starch gelatinization adhesion is very strong; in addition, the reaction time is 6h, and the reaction time is long. The protein in rice bran acts as a surfactant, reducing the oil-water interfacial tension, making oil and water form a stable oil-water emulsification system, making it difficult to break the emulsion, and ultimately affecting the oil yield
The above technical control parameters temperature and time are unfavorable for oil extraction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Rice bran puffing: glutinous rice bran is used as the raw material, with a fat content of 21.0% and a protein content of 13.5%. After putting the rice bran into the extruder, it is extruded under high pressure and high temperature to form puffed particles;

[0024] (2) Add water to the above rice bran puffed product for extraction, the weight ratio of the rice bran puffed product to water is 1:5, use lactic acid to adjust the pH of the extract to 4.5, add 400 U of cellulase to each gram of rice bran puffed product , acid protease amount 50U, amylase activity 100U, at the same time, add 1.0% CaCl to the rice bran puffed product, stir evenly, enzymolysis temperature 40 ℃, first enzymolysis time 3h, then assist with ultrasonic frequency 30kHz, ultrasonic vibration 20min, filter, The filtrate and filter residue are obtained, and after the filtrate is clarified, the upper crude rice bran oil is extracted for subsequent use. After determination, the residual oil rate of r...

Embodiment 2

[0029] (1) Rice bran puffing: sticky rice (ordinary rice) rice bran is used as raw material, with a fat content of 19.5% and a protein content of 15.5%. After putting the rice bran into the extruder, it is extruded under high pressure and high temperature to form puffed particles;

[0030] (2) Add water to the above rice bran puffed product for extraction, the weight ratio of the rice bran puffed product to water is 1:5, use citric acid to adjust the pH of the extract to 4.5, add the amount of cellulase to each gram of rice bran puffed product 300U, 80U of acid protease, 100U of amylase activity, at the same time add 0.8% CaCl to the puffed rice bran, stir evenly, enzymolysis temperature 40°C, first enzymolysis time 3h, then assist with ultrasonic frequency 30kHz, ultrasonic vibration 20min, filter , to obtain the filtrate and filter residue, and after the filtrate is clarified, the upper part of the crude rice bran oil is extracted for subsequent use. After determination, the...

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Abstract

The invention relates to an aqueous enzymatic method for extracting organic rice bran oil, which belongs to the technical field of preparation of edible oil. The method is characterized by comprising the following steps: puffing of rice bran; extraction of rice bran oil; acid precipitation and demulsification of crude rice bran oil; degumming; de-waxing; and decoloring. With rice bran oil yield as an index, optimal process conditions of the aqueous enzymatic method are as follows: a weight ratio of a puffed substance of rice bran to water is 1: 5; citric acid or lactic acid is used to adjust the pH value of extract to 4.5; 300 to 400 U of cellulase, 50 to 80 U of acidic protease and 100 U of amylase are added in each g of the puffed substance of rice bran, and 0.5 to 1.0% of CaCl is added in terms of the puffed substance of rice bran so as to improve enzyme activity; enzymatic hydrolysis temperature is 40 DEG C; and enzymatic hydrolysis is carried out for 3 h at first, then assisted ultrasonic oscillation by using ultrasonic waves with a frequency of 30 kHz is carried out for 20 min to extract rice bran oil, and rice bran oil yield is 88.1 to 88.7%. The rice bran oil prepared in the invention has high purity and an acid value of below 2 mg KOH / g; and the method meets standards for organic production.

Description

technical field [0001] The invention relates to a method for extracting organic rice bran oil by an aqueous enzymatic method, belonging to the technical field of edible oil preparation. Background technique [0002] Rice is the main food crop in my country, and rice bran is a by-product of rice processing. Although the weight of rice bran, a by-product of its processing, only accounts for 5-6% of the weight of rice, it has high utilization value. Rice bran is rich in 64% of the nutritional and functional components of rice, and fat accounts for 15-22%. Among them, the fat content of glutinous rice bran is 20-22%, the fat content of indica rice bran is 18-20%, and the fat content of japonica rice bran is 16-20%. In addition, rice bran also contains 12-17% of protein, 7-9% of crude fiber, 38-43% of soluble nitrogen extract, 8-12% of ash, and 9-14% of water. The rice bran oil obtained by processing and refining rice bran contains about 38% linoleic acid and about 40% oleic aci...

Claims

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Application Information

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IPC IPC(8): C11B1/00C11B1/04C11B3/00
Inventor 周宝龙王永辉丁鹏
Owner YANGXIAN YONGHUI AGRI IND DEVCO LTD