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An extraction method and technology for rice bran oil, which are applied in the directions of edible oil/fat, fat oil/fat production, and fat oil/fat refining, etc., can solve the problems of impossible large-scale production, low oil yield, and high technical requirements
Inactive Publication Date: 2012-12-05
ANHUI YANZHIFANG FOOD
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These three methods have their own characteristics: the rice bran oil extracted by the traditional mechanical pressing method has the advantages of good oil quality, good-looking color, pure edible, etc., but the oil yield is low; Large-scale production, but the color of the oil is darker and the crude oil contains more non-oily substances; the oil quality of the oil in the supercritical extraction method is better, but it requires high technology and expensive equipment, and it is impossible to produce on a large scale now
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Embodiment 1
[0016] A method for extracting rice bran oil, characterized in that it comprises the following steps:
[0017] (1) Fresh rice bran pretreatment: Weigh 100 kg of fresh rice bran, screen and wet-expand;
[0018] (2) Crude rice bran oil: crush the rice bran that has undergone wet puffing treatment, the crushing degree is 50 mesh, and the water content is 7%. Add the leaching solvent isopropanol, PH6, 60°C according to the ratio of material to liquid 1:5 (W / V) Leach at constant temperature for 2 hours; then recover the solvent by evaporation.
[0019] (3) Refining: the initial temperature of alkali refining is 45°C, the concentration of KOH is 18.5%, and the amount of excess alkali is 0.4%; the second decolorization process is adopted, the first active bleaching clay is added at 4%, the decolorization time is 30 minutes, and the decolorization temperature is 90°C; For the second decolorization, the amount of bleaching clay is 3%, the decolorization time is 15 minutes, the decolor...
Embodiment 2
[0021] A method for extracting rice bran oil, characterized in that it comprises the following steps:
[0022] (1) Fresh rice bran pretreatment: Weigh 300 kg of fresh rice bran, screen and wet-expand;
[0023] (2) Crude rice bran oil: crush the rice bran that has undergone wet puffing treatment, the crushing degree is 50 mesh, and the water content is 7%. Add the leaching solvent isopropanol, PH6, 60°C according to the ratio of material to liquid 1:5 (W / V) Leach at constant temperature for 2 hours; then recover the solvent by evaporation.
[0024] (3) Refining: the initial temperature of alkali refining is 45°C, the concentration of KOH is 18.5%, and the amount of excess alkali is 0.4%; the second decolorization process is adopted, the first active bleaching clay is added at 4%, the decolorization time is 30 minutes, and the decolorization temperature is 90°C; For the second decolorization, the amount of bleaching clay is 3%, the decolorization time is 15 minutes, the decolor...
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Abstract
A rice bran oil extraction method is characterized by includes the steps: (1) fresh rice bran pretreatment, namely subjecting rice bran to screening and wet puffing; (2) rough rice bran oil preparation, namely adding isopropyl alcohol serving as extraction solvent into the rice bran with comminution degree of 50 meshes and water content of 7% after wet puffing according to a feed liquid ratio of 1:5 (W/V), and extracting for 2 hours at PH of 6 and at constant temperature of 60 DEG C, and recovering the solvent by means of evaporation; and (3) refining, namely performing alkali refining with the initial temperature of 45 DEG C, the KOH concentration of 18.5% and the excess alkali quantity of 0.4%; adopting a two-time decoloration process with the first-time active decoloration carclazyte dosage of 4%, the first-time decoloration time of 30min and the first-time decoloration temperature of 90 DEG C, the second-time decoloration carclazyte dosage of 3%, the second-time decoloration time of 15min, the second-time decoloration temperature of 85 DEG C and the vacuum degree of 0.08MPa; and performing vacuum steam distillation for deodorization for 1.5h at 180 DEG C with the vacuum degree of 0.08MPa. Using the rice bran oil extraction method can extract rice bran oil from rice bran to the utmost by the aid of existing equipment and enable the extracted rice bran oil to meet national standards.
Description
technical field [0001] The invention belongs to the field of food processing, and relates to a method for extracting rice bran oil, in particular to an industrialized method for extracting rice bran oil. technical background [0002] Rice bran is a by-product of rice processing, and rice bran oil is the oil produced from the bran layer of rice bran. Rice bran contains 15%-22% oil. Rice bran oil is a high-quality edible oil, which contains fatty acids necessary to promote the healthy growth of the human body. It has the advantages of storage resistance and thermal oxidation resistance, and is also known as "healthy oil" and "nutritional oil". Rice bran oil is also a health-care medical cereal oil with high nutritional value. For example, the industrial by-products of fatty acids are directly obtained during processing, oryzanol is extracted, and pharmaceutical products such as periodontal and natural tocopherol are produced. Its market prospect is broad , especially in devel...
Claims
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Application Information
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