CN104397339A

CN104397339A - Manufacturing method of degreased rice bran

Info

Publication number: CN104397339A
Application number: CN201410699041.4A
Authority: CN
Inventors: 李勃; 谢云飞; 刘良忠; 石韧
Original assignee: JIANGSU KANG ZHI YUAN GRAIN AND OIL CO Ltd
Current assignee: JIANGSU KANG ZHI YUAN GRAIN AND OIL CO Ltd
Priority date: 2014-11-28
Filing date: 2014-11-28
Publication date: 2015-03-11

Abstract

The invention belongs to the technical field of food processing, and particularly relates to a manufacturing method of degreased rice bran. The manufacturing method comprises the following steps: preprocessing fresh rich bran to obtain the purified rice bran with the fine broken rice content lower than 1%; drying the purified rice bran until the moisture content is less than 5%; using an extracting agent to perform puffing and oil-impregnated treatment on the dried rice bran, wherein during the extracting process, the extraction temperature is 70-85 DEG C, the extraction duration is 2-5 hours, and an extracting container is required to be sealed and protected by nitrogen; for the extracted rice bran, draining off the extracting agent, drying and recovering the extracting agent, and drying to obtain the degreased rice bran. The manufacturing method of the degreased rice bran, provided by the invention, has the benefits of eliminating the stabilizing treatment step of the rice bran, saving the energy source, and reducing the steps and the cost in the rice bran degreasing process; during the extracting process, the container is sealed and protected by nitrogen, so as to prevent oxidative deterioration of the grease in the rice bran, and compared with the conventional method, the method has the advantages that the yield rice bran oil is increased and the quality of the rice bran oil is improved.

Description

A kind of manufacture method of defatted rice bran

Technical field

The invention belongs to food processing technology field, particularly a kind of manufacture method of defatted rice bran.

Background technology

Rice bran accounts for 10% of paddy weight, for brown rice is ground into the byproduct of rice, wherein about containing grease, the dietary fiber of 25%, the protein of 14% and the carbohydrate of 45% of 18-24%.The comparable U.S. milk casein of amino acid composition of rice bran protein matter.Rice bran is rich in the multiple compositions with anti-oxidation efficacy such as mineral matter element and γ-rice bran alcohol, cupreol such as Cobastab, group such as vitamin E such as fertility alcohol and tocotrienols etc., potassium, magnesium, phosphorus, and there is the GABA etc. of physiological regulation function, food processing has the potentiality as many nutrient supplementary sources.ANFs mainly trypsin ihhibitor and the lipase of rice bran, chaff wax contained in the fat of 13-16% has negative effect to palatability, very easily becomes sour; Therefore need that ungrease treatment is carried out to rice bran and just can be suitably used as feed part or the carrier as veterinary drug, pre-mixing agent and feed addictive.

Summary of the invention

The technical problem to be solved in the present invention is: the manufacture method providing a kind of defatted rice bran.

The technical solution adopted for the present invention to solve the technical problems is:

(1) pre-treatment is carried out to fresh rice bran, obtain meter crushed rices content lower than 1% purification rice bran;

(2) oven dry of purification rice bran is less than 5% to moisture;

(3) rice bran after drying adopts digestion agent to carry out expanded, immersion oil process, and the extraction temperature in leaching process is 70-85 DEG C, lixiviate 2-5h, and leaching vessel need seal and use nitrogen protection;

(4) rice bran after lixiviate drains digestion agent post-drying and reclaims digestion agent, obtains defatted rice bran after oven dry.

Preferably, described step (3) can repeatedly be carried out, and lixiviate repeatedly.

Preferably, described digestion agent is isopropyl alcohol or n-hexane.

Preferably, the weight ratio of described digestion agent and rice bran is 1:0.8-1.2.

The invention has the beneficial effects as follows: the manufacture method that a kind of defatted rice bran is provided, owing to containing rich in protein in fresh rice bran, lipid, enzyme, vitamin and mineral matter, as processed not in time, rice bran quality is very easily rotten, especially the lipid material in rice bran can be decomposed into free fatty rapidly, the existence of a large amount of free fatty, not only seriously can reduce the recovery rate of rice bran oil, and each aliphatic acid of insatiable hunger decomposed out is that LOX provides substrate, thus acceleration grease oxidation rancid, have a strong impact on the productive rate of rice bran oil, color and luster, smell and edible quality, need to carry out stabilization processes to rice bran, steam is such as used to heat, or add anticorrisive agent etc., extraction temperature is then brought up to 70-85 DEG C by the application in leaching process, eliminates the stabilization processes step of rice bran, has saved the energy, decrease the step in rice bran skimming processes and cost, airtight container in leaching process also uses nitrogen protection, prevents the Oxidation of Fat and Oils in rice bran to go bad, and improves yield and the quality of rice bran oil compared to conventional method.

Detailed description of the invention

Now in conjunction with specific embodiments, the present invention is further detailed explanation.

Embodiment 1

Removal of impurities process is carried out to fresh rice bran, impurity and the rice crushed rices such as removing irony class, stone husky class, straw rope, straw, obtain meter crushed rices content lower than 1% purification rice bran; The oven dry of purification rice bran is less than 5% to moisture; Rice bran after oven dry adopts isopropyl alcohol to carry out expanded, immersion oil process, and the weight ratio of isopropyl alcohol consumption and dry rice bran is 0.8; Extraction temperature in leaching process is 70 DEG C, lixiviate 5h, repeats lixiviate 3 times; Be provided with agitating device in leaching vessel, leaching vessel seals and uses nitrogen protection;

After rice bran after lixiviate drains digestion agent, dry and reclaim isopropyl alcohol, after oven dry, obtain defatted rice bran.

Embodiment 2

Removal of impurities process is carried out to fresh rice bran, impurity and the rice crushed rices such as removing irony class, stone husky class, straw rope, straw, obtain meter crushed rices content lower than 1% purification rice bran; The oven dry of purification rice bran is less than 5% to moisture; Rice bran after oven dry adopts isopropyl alcohol to carry out expanded, immersion oil process, and the weight ratio of isopropyl alcohol consumption and dry rice bran is 1; Extraction temperature in leaching process is 80 DEG C, lixiviate 3h, repeats lixiviate 3 times; Be provided with agitating device in leaching vessel, leaching vessel seals and uses nitrogen protection;

Embodiment 3

Removal of impurities process is carried out to fresh rice bran, impurity and the rice crushed rices such as removing irony class, stone husky class, straw rope, straw, obtain meter crushed rices content lower than 1% purification rice bran; The oven dry of purification rice bran is less than 5% to moisture; Rice bran after oven dry adopts n-hexane to carry out expanded, immersion oil process, and the weight ratio of n-hexane consumption and dry rice bran is 1.1; Extraction temperature in leaching process is 85 DEG C, lixiviate 2h, repeats lixiviate 3 times; Be provided with agitating device in leaching vessel, leaching vessel seals and uses nitrogen protection;

Claims

1. a manufacture method for defatted rice bran, it is characterized in that being realized by following approach:

(2) oven dry of purification rice bran is less than 5% to moisture;

2. a manufacture method for defatted rice bran as claimed in claim 1, it is characterized in that described step (3) can repeatedly be carried out, lixiviate repeatedly.

3. a manufacture method for defatted rice bran as claimed in claim 1, is characterized in that described digestion agent is isopropyl alcohol or n-hexane.

4. a manufacture method for defatted rice bran as claimed in claim 1, is characterized in that the weight ratio of described digestion agent and rice bran is 1:0.8-1.2.