CN102934700A - Refining method of rice oil - Google Patents
Refining method of rice oil Download PDFInfo
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Abstract
The invention discloses a refining method of rice oil and belongs to the technical field of refined grease. The refining method is used for solving the problems of high energy consumption, large oil refining loss, nutrient loss and environmental pollution. The refining method of rice oil comprises the following steps of: heating rice bran oil of four-level standard to 150-170 DEG C through a heat exchanger, conveying the rice bran oil into a molecular still, distributing the rice bran oil on an evaporation surface through a material distributor, wherein the temperature of the evaporation surface is 190-245 DEG C, cooling the light component pigment to 35-42 DEG C through a built-in condenser, and the light component pigment flows into a light component collection tank, the heavy component directly enters a heavy component collection tank, and the vacuum degree of a decolorizing system is 5-40 Pa, and performing fractionation, deacidification and winterization degreasing to obtain the rice oil. The refining method of rice oil can be extensively used for refining the rice oil.
Description
Technical field
The present invention relates to a kind of method of edible oil processing, particularly a kind of process for purification of rice oil.
Background technology
Rice oil is commonly called as rice bran oil, is the accessory substance rice skin that rice produces in rolling over white process, makes crude oil through squeezing or extract technology, the product that then obtains after further refining (physical refining or chemical refining) is processed.Because its aliphatic acid forms rationally, and the lipid such as the vitamin E that contains, sterol, oryzanol are conducive to the absorption of human body, have the cholesterol removed in the blood, reduce blood fat, promote the human body beneficial effect such as grow, and become the nutrient health oil of generally acknowledging both at home and abroad.It is worth mentioning that, oryzanol is a characteristic index of rice oil, and the content of oryzanol is about 2.5% in the rice crude oil.Rice oil has been subject to the extensive concern of countries in the world at present, becomes another edible oil after sunflower oil, maize germ oil.
Rice oil is because of the particularity of its rice material skin structure, be rich in lipase, after rolling over white processing, enzyme is processed as not going out rapidly, can cause grease to issue the unboiled water solution in the catalytic action of lipase, the acid value of crude oil is raise rapidly, and (acid value can reach 30～50mgKOH/g) sometimes, thereby causes difficulty for follow-up refining.
In the rice oil process, generally take the method for alkali refining or physical deacidification to carry out depickling at present.Its weak point is alkali refining except causing a large amount of losses of neutral oil and can producing a large amount of waste water, also can so that the content of oryzanol greatly reduce, thereby make product rice oil two-story valley dimension cellulose content extremely low, nutritive value is had a greatly reduced quality; The weak point of physical deacidification is that energy consumption is high, easily producing trans-fatty acid in the pyroprocess for a long time, health is had potential hazard simultaneously.In the conventional refinery practice of rice oil, the method for bleaching earth adsorption is adopted in decolouring usually, and weak point is to cause the loss of neutral oil except meeting, and the further harmless processing of decolorizing earth also is that one of manufacturer bears greatly.In addition, the rice oil colours pool after the decolouring is difficult to reach the standard of GB 19112-2003 primary oil, and also to be that rice bran oil on the market is most be the reason place of level Four oil for this.
Summary of the invention
The present invention overcomes the deficiency of above-mentioned technology, and a kind of trans-fatty acid that do not produce is provided, and product color surpasses the standard of GB 19112-2003 primary oil, the product yield is high, do not add any auxiliary agent, non-wastewater discharge, the process for purification of the rice oil of the high and product aromatic flavour of oryzanol retention rate.
In order to solve the problem of above-mentioned technology, the present invention realizes by following steps:
(1) decolouring: with the rice bran oil of level Four standard, be warmed up to 150～170 ℃ through heat exchanger, then enter molecular still, through the distributing device uniform distribution in evaporating surface, the temperature of evaporating surface is at 190～245 ℃, and the light component pigment cools to 35～42 ℃ through built-in condenser, flows into the light component collecting tank, recombinating to divide directly entering a restructuring minute collecting tank, and the vacuum of decolouring system is at 5～40Pa;
(2) divide and carry: the first step, restructuring lease making heat exchanger is warming up to 230～250 ℃, then entering molecular still makes with extra care, material through the distributing device uniform distribution in evaporating surface, the temperature of evaporating surface is at 300～310 ℃, and light component cools to 35～42 ℃ through built-in condenser, flows into the semi-finished product collecting tank, recombinating to divide directly entering a restructuring minute collecting tank, divides and puies forward the vacuum of system at 0.1～5Pa; Second step, the restructuring lease making heat exchanger that the first step is collected is warming up to 240～260 ℃, then entering molecular still makes with extra care, material through the distributing device uniform distribution in evaporating surface, the temperature of evaporating surface is at 310～320 ℃, and light component cools to 35～42 ℃ through built-in condenser, flows into the semi-finished product collecting tank, recombinating to divide directly entering a restructuring minute collecting tank, divides and puies forward the vacuum of system at 0.1～5Pa;
(3) depickling: divide two light component semi-finished product putting forward step to mix, be warming up to 240～260 ℃ through heat exchanger, then enter extracting tower, logical an amount of superheated steam at the bottom of the extracting tower, vacuum is at 50～300Pa;
(4) winterization degreasing: the rice oil pump after depickling is processed is to the winterization tank, under stirring, be warming up to 32～35 ℃, then enter crystallization stage, rate of temperature fall with 1.5～2 ℃/h cools to 15 ℃, and then the rate of temperature fall with 0.5 ℃/h cools to 3 ℃, enters the growing the grain stage, and in 3 ℃ of constant temperature growing the grain 14h, enter afterwards Winterization filter and filter, filter pressure is not more than 0.2Mpa, and the winterization degreasing is complete namely to make refining rice oil.
Compared with prior art, beneficial effect advantage of the present invention is: utilize physical method to realize the decolouring of rice oil and minute carry, high-temperature time is extremely short in the subtractive process, do not produce trans-fatty acid, product color surpasses the standard of GB 19112-2003 primary oil, the product yield is high, and whole process is not added any auxiliary agent, non-wastewater discharge, the high and product aromatic flavour of oryzanol retention rate.
Description of drawings
Fig. 1 is process chart of the present invention;
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
Embodiment 1
The level Four rice bran oil is warmed up to 155 ℃ through heat exchanger, then enter molecular still, through the distributing device uniform distribution in evaporating surface, the temperature of evaporating surface is at 195 ℃, the light component pigment cools to 37 ℃ through built-in condenser, flow into the light component collecting tank, recombinating to divide directly entering a restructuring minute collecting tank, and the vacuum of decolouring system is at 5Pa.Restructuring minute enters the first step and divides and put forward operation, be warming up to 230 ℃ through heat exchanger, then entering molecular still makes with extra care, material through the distributing device uniform distribution in evaporating surface, the temperature of evaporating surface is at 300 ℃, divide and put forward the vacuum of system at 1Pa, light component cools to 35 ℃ through built-in condenser, flow into the semi-finished product collecting tank, restructuring minute directly entering a restructuring minute collecting tank, then enters second step and divides and put forward operation, be warming up to 240 ℃ through heat exchanger, enter molecular still and make with extra care, in evaporating surface, the temperature of evaporating surface is at 310 ℃ through the distributing device uniform distribution for material, divide and put forward the vacuum of system at 3Pa, light component cools to 35 ℃ through built-in condenser, flows into the semi-finished product collecting tank, recombinates to divide directly entering a restructuring minute collecting tank.Two steps divided two light component semi-finished product after carrying to mix, and were warming up to 240 ℃ through heat exchanger, then entered extracting tower, logical an amount of superheated steam at the bottom of the extracting tower, and vacuum is at 133Pa.Rice oil pump after depickling is processed is to the winterization tank, under stirring, be warming up to 32 ℃, then enter crystallization stage, rate of temperature fall with 1.5 ℃/h cools to 15 ℃, then the rate of temperature fall with 0.5 ℃/h cools to 3 ℃, enters the growing the grain stage, and in 3 ℃ of constant temperature growing the grain 14h, enter afterwards Winterization filter and filter, filter pressure is not more than 0.2Mpa.The complete finished product rice oil that namely makes of winterization degreasing, lustre index reaches R3.2, Y35 (133.4mm groove).
Embodiment 2
The level Four rice bran oil is warmed up to 170 ℃ through heat exchanger, then enter molecular still, through the distributing device uniform distribution in evaporating surface, the temperature of evaporating surface is at 245 ℃, the light component pigment cools to 42 ℃ through built-in condenser, flow into the light component collecting tank, recombinating to divide directly entering a restructuring minute collecting tank, and the vacuum of decolouring system is at 40Pa.Restructuring minute enters the first step and divides and put forward operation, be warming up to 250 ℃ through heat exchanger, then entering molecular still makes with extra care, material through the distributing device uniform distribution in evaporating surface, the temperature of evaporating surface is at 310 ℃, divide and put forward the vacuum of system at 2Pa, light component cools to 42 ℃ through built-in condenser, flow into the semi-finished product collecting tank, restructuring minute directly entering a restructuring minute collecting tank, then enters second step and divides and put forward operation, be warming up to 260 ℃ through heat exchanger, enter molecular still and make with extra care, in evaporating surface, the temperature of evaporating surface is at 320 ℃ through the distributing device uniform distribution for material, divide and put forward the vacuum of system at 4Pa, light component cools to 35 ℃ through built-in condenser, flows into the semi-finished product collecting tank, recombinates to divide directly entering a restructuring minute collecting tank.Two steps divided two light component semi-finished product after carrying to mix, and were warming up to 260 ℃ through heat exchanger, then entered extracting tower, logical an amount of superheated steam at the bottom of the extracting tower, and vacuum is at 300Pa.Rice oil pump after depickling is processed is to the winterization tank, under stirring, be warming up to 35 ℃, then enter crystallization stage, rate of temperature fall with 2 ℃/h cools to 15 ℃, then the rate of temperature fall with 0.5 ℃/h cools to 3 ℃, enters the growing the grain stage, and in 3 ℃ of constant temperature growing the grain 14h, enter afterwards Winterization filter and filter, filter pressure is not more than 0.2Mpa.The complete finished product rice oil that namely makes of winterization degreasing, lustre index reaches R3.0, Y35 (133.4mm groove).
Embodiment 3
The level Four rice bran oil is warmed up to 165 ℃ through heat exchanger, then enter molecular still, through the distributing device uniform distribution in evaporating surface, the temperature of evaporating surface is at 195 ℃, the light component pigment cools to 37 ℃ through built-in condenser, flow into the light component collecting tank, recombinating to divide directly entering a restructuring minute collecting tank, and the vacuum of decolouring system is at 20Pa.Restructuring minute enters the first step and divides and put forward operation, be warming up to 230 ℃ through heat exchanger, then entering molecular still makes with extra care, material through the distributing device uniform distribution in evaporating surface, the temperature of evaporating surface is at 300 ℃, divide and put forward the vacuum of system at 1Pa, light component cools to 35 ℃ through built-in condenser, flow into the semi-finished product collecting tank, restructuring minute directly entering a restructuring minute collecting tank, then enters second step and divides and put forward operation, be warming up to 240 ℃ through heat exchanger, enter molecular still and make with extra care, in evaporating surface, the temperature of evaporating surface is at 310 ℃ through the distributing device uniform distribution for material, divide and put forward the vacuum of system at 3Pa, light component cools to 35 ℃ through built-in condenser, flows into the semi-finished product collecting tank, recombinates to divide directly entering a restructuring minute collecting tank.Two steps divided two light component semi-finished product after carrying to mix, and were warming up to 240 ℃ through heat exchanger, then entered extracting tower, logical an amount of superheated steam at the bottom of the extracting tower, and vacuum is at 266Pa.Rice oil pump after depickling is processed is to the winterization tank, under stirring, be warming up to 32 ℃, then enter crystallization stage, rate of temperature fall with 1.5 ℃/h cools to 15 ℃, then the rate of temperature fall with 0.5 ℃/h cools to 3 ℃, enters the growing the grain stage, and in 3 ℃ of constant temperature growing the grain 14h, enter afterwards Winterization filter and filter, filter pressure is not more than 0.2Mpa.The complete finished product rice oil that namely makes of winterization degreasing, lustre index reaches R2.9, Y29 (133.4mm groove).
Embodiment 4
The level Four rice bran oil is warmed up to 170 ℃ through heat exchanger, then enter molecular still, through the distributing device uniform distribution in evaporating surface, the temperature of evaporating surface is at 245 ℃, the light component pigment cools to 42 ℃ through built-in condenser, flow into the light component collecting tank, recombinating to divide directly entering a restructuring minute collecting tank, and the vacuum of decolouring system is at 30Pa.Restructuring minute enters the first step and divides and put forward operation, be warming up to 250 ℃ through heat exchanger, then entering molecular still makes with extra care, material through the distributing device uniform distribution in evaporating surface, the temperature of evaporating surface is at 310 ℃, divide and put forward the vacuum of system at 2Pa, light component cools to 42 ℃ through built-in condenser, flow into the semi-finished product collecting tank, restructuring minute directly entering a restructuring minute collecting tank, then enters second step and divides and put forward operation, be warming up to 260 ℃ through heat exchanger, enter molecular still and make with extra care, in evaporating surface, the temperature of evaporating surface is at 320 ℃ through the distributing device uniform distribution for material, divide and put forward the vacuum of system at 4Pa, light component cools to 35 ℃ through built-in condenser, flows into the semi-finished product collecting tank, recombinates to divide directly entering a restructuring minute collecting tank.Two steps divided two light component semi-finished product after carrying to mix, and were warming up to 250 ℃ through heat exchanger, then entered extracting tower, logical an amount of superheated steam at the bottom of the extracting tower, and vacuum is at 100Pa.Rice oil pump after depickling is processed is to the winterization tank, under stirring, be warming up to 35 ℃, then enter crystallization stage, rate of temperature fall with 2 ℃/h cools to 15 ℃, then the rate of temperature fall with 0.5 ℃/h cools to 3 ℃, enters the growing the grain stage, and in 3 ℃ of constant temperature growing the grain 14h, enter afterwards Winterization filter and filter, filter pressure is not more than 0.2Mpa.The complete finished product rice oil that namely makes of winterization degreasing, lustre index reaches R2.5, Y25 (133.4mm groove).
Claims (1)
1. the process for purification of a rice oil is characterized in that may further comprise the steps:
(1) decolouring: with the rice bran oil of level Four standard, be warmed up to 150～170 ℃ through heat exchanger, then enter molecular still, through the distributing device uniform distribution in evaporating surface, the temperature of evaporating surface is at 190～245 ℃, and the light component pigment cools to 35～42 ℃ through built-in condenser, flows into the light component collecting tank, recombinating to divide directly entering a restructuring minute collecting tank, and the vacuum of decolouring system is at 5～40Pa;
(2) divide and carry: the first step, restructuring lease making heat exchanger is warming up to 230～250 ℃, then entering molecular still makes with extra care, material through the distributing device uniform distribution in evaporating surface, the temperature of evaporating surface is at 300～310 ℃, and light component cools to 35～42 ℃ through built-in condenser, flows into the semi-finished product collecting tank, recombinating to divide directly entering a restructuring minute collecting tank, divides and puies forward the vacuum of system at 0.1～5Pa; Second step, the restructuring lease making heat exchanger that the first step is collected is warming up to 240～260 ℃, then entering molecular still makes with extra care, material through the distributing device uniform distribution in evaporating surface, the temperature of evaporating surface is at 310～320 ℃, and light component cools to 35～42 ℃ through built-in condenser, flows into the semi-finished product collecting tank, recombinating to divide directly entering a restructuring minute collecting tank, divides and puies forward the vacuum of system at 0.1～5Pa;
(3) depickling: divide two light component semi-finished product putting forward step to mix, be warming up to 240～260 ℃ through heat exchanger, then enter extracting tower, logical an amount of superheated steam at the bottom of the extracting tower, vacuum is at 50～300Pa;
(4) winterization degreasing: the rice oil pump after depickling is processed is to the winterization tank, under stirring, be warming up to 32～35 ℃, then enter crystallization stage, rate of temperature fall with 1.5～2 ℃/h cools to 15 ℃, and then the rate of temperature fall with 0.5 ℃/h cools to 3 ℃, enters the growing the grain stage, and in 3 ℃ of constant temperature growing the grain 14h, enter afterwards Winterization filter and filter, filter pressure is not more than 0.2Mpa, and the winterization degreasing is complete namely to make refining rice oil.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103320220A (en) * | 2013-07-19 | 2013-09-25 | 河南华泰粮油机械工程有限公司 | Method for distilling and refining high-grade oil by rice bran oil molecules |
| CN103740462A (en) * | 2014-01-10 | 2014-04-23 | 陈汉卿 | Oil refining method |
| CN103805338A (en) * | 2014-01-10 | 2014-05-21 | 陈汉卿 | Short-path distillation production method and short-path distiller for increasing unsaturated fatty acid content of vegetable oil |
| CN103805337A (en) * | 2014-01-10 | 2014-05-21 | 陈汉卿 | Rice bran oil refining method |
| CN104164300A (en) * | 2014-09-02 | 2014-11-26 | 邹平健源油脂有限公司 | Refining method of corn oil |
| CN104611132A (en) * | 2015-02-04 | 2015-05-13 | 蚌埠市江淮粮油有限公司 | Acid reducing process of rice oil |
| CN104862073A (en) * | 2015-05-21 | 2015-08-26 | 西安中粮工程研究设计院有限公司 | Method for refining first-grade rice bran oil from four-grade rice bran oil through molecular distillation |
| CN106167738A (en) * | 2016-09-21 | 2016-11-30 | 山东健源油脂科技有限公司 | The rice essential smelting method of high plant sterol |
| CN108587782A (en) * | 2018-05-22 | 2018-09-28 | 许昌元化生物科技有限公司 | A kind of method of refining of perilla herb oil |
| CN113234535A (en) * | 2021-04-23 | 2021-08-10 | 广东华谷油脂科技有限公司 | Distributing device and distributing method for rice bran oil decoloration |
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| CN103320220B (en) * | 2013-07-19 | 2015-01-14 | 河南华泰粮油机械工程有限公司 | Method for distilling and refining high-grade oil by rice bran oil molecules |
| CN103320220A (en) * | 2013-07-19 | 2013-09-25 | 河南华泰粮油机械工程有限公司 | Method for distilling and refining high-grade oil by rice bran oil molecules |
| CN103805337B (en) * | 2014-01-10 | 2016-08-17 | 陈汉卿 | A kind of Testa oryzae oil process for purification |
| CN103740462A (en) * | 2014-01-10 | 2014-04-23 | 陈汉卿 | Oil refining method |
| CN103805338A (en) * | 2014-01-10 | 2014-05-21 | 陈汉卿 | Short-path distillation production method and short-path distiller for increasing unsaturated fatty acid content of vegetable oil |
| CN103805337A (en) * | 2014-01-10 | 2014-05-21 | 陈汉卿 | Rice bran oil refining method |
| CN103740462B (en) * | 2014-01-10 | 2016-08-17 | 陈汉卿 | A kind of oils and fats process for purification |
| CN104164300A (en) * | 2014-09-02 | 2014-11-26 | 邹平健源油脂有限公司 | Refining method of corn oil |
| CN104611132A (en) * | 2015-02-04 | 2015-05-13 | 蚌埠市江淮粮油有限公司 | Acid reducing process of rice oil |
| CN104862073B (en) * | 2015-05-21 | 2016-01-13 | 西安中粮工程研究设计院有限公司 | Utilize level Four Rice pollard oil by the method for molecular distillation refining grade rice bran oil |
| CN104862073A (en) * | 2015-05-21 | 2015-08-26 | 西安中粮工程研究设计院有限公司 | Method for refining first-grade rice bran oil from four-grade rice bran oil through molecular distillation |
| CN106167738A (en) * | 2016-09-21 | 2016-11-30 | 山东健源油脂科技有限公司 | The rice essential smelting method of high plant sterol |
| CN106167738B (en) * | 2016-09-21 | 2019-07-19 | 山东健源油脂科技有限公司 | The rice essential smelting method of high phytosterol |
| CN108587782A (en) * | 2018-05-22 | 2018-09-28 | 许昌元化生物科技有限公司 | A kind of method of refining of perilla herb oil |
| CN108587782B (en) * | 2018-05-22 | 2021-11-12 | 许昌元化生物科技有限公司 | Refining method of perilla oil |
| CN113234535A (en) * | 2021-04-23 | 2021-08-10 | 广东华谷油脂科技有限公司 | Distributing device and distributing method for rice bran oil decoloration |
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