CN105087136A - Preparation method for high-quality rice bran oil - Google Patents
Preparation method for high-quality rice bran oil Download PDFInfo
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Abstract
The invention discloses a preparation method for high-quality rice bran oil. The method comprises the following steps: S1, rice bran preservation: a step of placing rice bran in an extrusion-expansion machine, carrying out heating to 100 to 120 DEG C, wherein a diameter of an extrusion film hole is 14 to 16 mm, then carrying out extrusion and expansion with a speed of 110 to 130 r/min, carrying out cooling to room temperature, spraying 0.03 to 0.05 wt% of vitamin E with rice bran weight as datum, and carrying out uniform mixing so as to obtain preserved rice bran; S2, crude rice bran oil extraction: a step of adding the preserved rice bran obtained in the S1 into a solvent, carrying out water bath heating to 50 to 60 DEG C, carrying out ultrasonic treatment under an ultrasonic power of 600 to 700 W for 30 to 50 min, then carrying out filtering and rotary evaporation so as to obtain crude rice bran oil; and S3, refining: a step of subjecting the crude rice bran oil obtained in the S2 to degumming, deacidifying, dewaxing, decolorizing and deodorizing so as to obtain the high-quality rice bran oil. The preparation method for the high-quality rice bran oil provided by the invention has the advantages of high oil quality, high oil extraction rate, high free fatty acid removal efficiency and simple operation.
Description
Technical field
The present invention relates to grease processing technology field, particularly relate to a kind of preparation method of high-quality Rice pollard oil.
Background technology
Rice pollard oil is rich in unsaturated fatty acids, wherein oleic acid, linoleic acid plus linolenic acid content up to more than 80%, based on oleic acid and linolic acid, refined rice bran oil contains the linolic acid of about 38% and the oleic acid of about 42%, both ratios are close to 1:1, the oleic acid and the linolic acid ratio that meet WHO's recommendation are the optimality criterion of 1:1, from the viewpoint of modern nutriology, the grease of this ratio has better nutritivity and is worth, and is referred to as abroad " health-nutrition oil "
Not only containing unsaturated fatty acids in Rice pollard oil, but also containing the sp act composition that some other edible vegetable oils do not have, as thiaminogen, tocopherol, squalene, sterol etc.Can not there is anaphylaxis in edible rice bran oil, Rice pollard oil can increase HDL-C protein content, and reduce low density cholesterol lipoprotein content, be improved immunologic function, reduce blood fat, prevent and treat arteriosclerosis, anticancer etc. maintains the effect of body health.That Rice pollard oil is oily as staple food in Japan, the many countries in West Europe.
Rice bran after milling, wherein the activity of lipase is very strong, contacts with each other with grease, can be very fast be decomposed by glyceryl ester wherein, produces free fatty acids, and the acid value of rice bran rose rapidly in the short period of time after just milling.The insect be mingled with in rice bran and microorganism also can accelerate the change of oil quality in rice bran, and this makes rice bran as the quality variation of the Rice pollard oil of waste.And the rice bran resource distribution of China is loose and wide, the very difficult short period of time concentrates in together carries out liquefaction production.When lixiviate Rice bran crude oil, different solvents, temperature can affect oil extracting rate and thiaminogen content.The loss of refining procedure to thiaminogen has considerable influence, and particularly deacidification process remains with considerable influence to thiaminogen.So, a kind of high-quality is provided, the Rice pollard oil of high thiaminogen content becomes the task of top priority.
Summary of the invention
Based on the technical problem that background technology exists, the present invention proposes a kind of preparation method of high-quality Rice pollard oil, quality of the present invention is high, and oil extracting rate is high, and thiaminogen content is high, and free fatty acids decreasing ratio is high, simple to operate, is beneficial to suitability for industrialized production.
The preparation method of a kind of high-quality Rice pollard oil that the present invention proposes, comprises the steps:
S1, fresh-keeping rice bran: rice bran is placed in extruder, be warming up to 100-120 DEG C, the diameter extruding fenestra is 14-16mm, extruding puffing is carried out with the speed of 110-130r/min, be cooled to room temperature, spray the 0.03-0.05wt% vitamin-E that is benchmark with rice bran weight, mixing obtain fresh-keeping after rice bran;
S2, lixiviate Rice bran crude oil: by obtain in S1 fresh-keeping after rice bran add in solvent, warming-in-water to 50-60 DEG C, under ultrasonic power is 600-700W, ultrasonic 30-50min, suction filtration, rotary evaporation obtains Rice bran crude oil;
S3, refining: by the Rice bran crude oil obtained in S2, be warming up to 25-35 DEG C, the 2-4wt% di-methylcarbinol amine that to add with Rice bran crude oil weight be benchmark, stirs 100-120min with the speed of 500-700r/min, centrifugal, get supernatant liquor, be warming up to 85-90 DEG C, add water, stir 20-30min, leave standstill 22-26h, centrifugal, get supernatant liquor, add water, stir 20-30min, leave standstill 3-5h, centrifugal, get supernatant liquor, vacuum hydro-extraction is dry, and dewaxing, decolouring, deodorization obtain high-quality Rice pollard oil.
Preferably, in S1, the moisture content of rice bran is 14-17wt%, and rice bran is 20-40 order.
Preferably, in S2, the rice bran after fresh-keeping and the weightmeasurement ratio of solvent are (g/ml) 1:5-7.
Preferably, in S2, solvent is one or both the mixture in Virahol, ethanol.
Preferably, in S2, solvent is the mixture of Virahol and ethanol, and the volume ratio of Virahol and ethanol is 1:0.8-1.2.
Preferably, in S3, by the Rice bran crude oil obtained in S2, be warming up to 28-32 DEG C, the 2.5-3.5wt% di-methylcarbinol amine that to add with Rice bran crude oil weight be benchmark, 105-115min is stirred with the speed of 550-650r/min, with the centrifugation 20-30min of 4000-6000r/min, get supernatant liquor, be warming up to 85-90 DEG C, the 4-6wt% water that to add with Rice bran crude oil weight be benchmark, 23-27min is stirred with the speed of 20-40r/min, leave standstill 23-25h, with the centrifugation 10-20min of 4000-6000r/min, get supernatant liquor, the 2-4wt% water that to add with Rice bran crude oil weight be benchmark, 23-27min is stirred with the speed of 20-40r/min, leave standstill 3.5-4.5h, with the centrifugation 10-20min of 4000-6000r/min, get supernatant liquor, vacuum hydro-extraction is dry, dewaxing, decolouring, deodorization obtains high-quality Rice pollard oil.
Spray vitamin-E after the present invention's extruding puffing and Preservation Treatment is done to rice bran, extruding puffing can suppress the activity of lipase, thus suppress lipase to cut grease, reduce the generation of free fatty acids, reduce acid value, rice bran cell walls can also be destroyed, be conducive to the infiltration of vitamin-E, while suppression lipase, the resistance of oxidation of further increase rice bran, extruding puffing and vitamin-E act synergistically mutually, greatly reduce acid value, decrease postorder complete processing to impact of the present invention, improve quality of the present invention; Destruction to cell walls when the rice bran of suitable particle diameter is conducive to extruding puffing, thus be conducive to the leaching that vitamin-E infiltrates rice bran and grease faster; The assisting ultrasonic process when lixiviate, ultrasonic wave produces bubble by liquid, accelerates mass transfer, reduces extraction time; Under optimal temperature, lixiviate can accelerate molecular motion, reduces extraction time further; Virahol, ethanol can increase the oil extracting rate of rice bran, increase the leaching yield of thiaminogen, improve quality of the present invention and thiaminogen content; Not only can remove the free fatty acids in Rice pollard oil during the depickling of di-methylcarbinol amine, and can remove in Rice pollard oil containing Phosphoglycolipid and other colloids, reach the effect that synchronous depickling is come unstuck, Simplified flowsheet step; Di-methylcarbinol amine is weakly alkaline in addition, can not glyceryl ester in saponification Rice pollard oil, the thiaminogen in Rice pollard oil therefore can not be made to run off with soap stock, thus increase quality of the present invention and thiaminogen content; Carry out twice washing and can wash di-methylcarbinol amine and water miscible phosphatide off, washing simultaneously can auxiliary degumming further, increases quality of the present invention; The present invention is simple to operate, is beneficial to suitability for industrialized production.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of the preparation method of a kind of high-quality Rice pollard oil that the present invention proposes.
Embodiment
As shown in Figure 1, Fig. 1 is the process flow sheet of the preparation method of a kind of high-quality Rice pollard oil that the present invention proposes.
With reference to Fig. 1, the preparation method of a kind of high-quality Rice pollard oil that the present invention proposes, comprises the steps:
S1, fresh-keeping rice bran: rice bran is placed in extruder, be warming up to 100-120 DEG C, the diameter extruding fenestra is 14-16mm, extruding puffing is carried out with the speed of 110-130r/min, be cooled to room temperature, spray the 0.03-0.05wt% vitamin-E that is benchmark with rice bran weight, mixing obtain fresh-keeping after rice bran;
S2, lixiviate Rice bran crude oil: by obtain in S1 fresh-keeping after rice bran add in solvent, warming-in-water to 50-60 DEG C, under ultrasonic power is 600-700W, ultrasonic 30-50min, suction filtration, rotary evaporation obtains Rice bran crude oil;
S3, refining: by the Rice bran crude oil obtained in S2, be warming up to 25-35 DEG C, the 2-4wt% di-methylcarbinol amine that to add with Rice bran crude oil weight be benchmark, stirs 100-120min with the speed of 500-700r/min, centrifugal, get supernatant liquor, be warming up to 85-90 DEG C, add water, stir 20-30min, leave standstill 22-26h, centrifugal, get supernatant liquor, add water, stir 20-30min, leave standstill 3-5h, centrifugal, get supernatant liquor, vacuum hydro-extraction is dry, and dewaxing, decolouring, deodorization obtain high-quality Rice pollard oil.
Below, by specific embodiment, technical scheme of the present invention is described in detail.
Embodiment 1
A preparation method for high-quality Rice pollard oil, comprises the steps:
S1, fresh-keeping rice bran: be 17wt% by moisture content, 20 object rice brans are placed in extruder, be warming up to 120 DEG C, the diameter extruding fenestra is 14mm, extruding puffing is carried out with the speed of 130r/min, be cooled to room temperature, the 0.03wt% vitamin-E that to spray with rice bran weight be benchmark, mixing obtain fresh-keeping after rice bran;
S2, lixiviate Rice bran crude oil: by obtain in S1 fresh-keeping after rice bran add in Virahol, warming-in-water to 50 DEG C, under ultrasonic power is 700W, ultrasonic 50min, suction filtration, rotary evaporation obtains Rice bran crude oil, and wherein, the rice bran after fresh-keeping and the weightmeasurement ratio of Virahol are (g/ml) 1:5;
S3, refining: by the Rice bran crude oil obtained in S2, be warming up to 35 DEG C, the 2wt% di-methylcarbinol amine that to add with Rice bran crude oil weight be benchmark, 100min is stirred with the speed of 700r/min, with the centrifugation 20min of 6000r/min, get supernatant liquor, be warming up to 90 DEG C, the 4wt% water that to add with Rice bran crude oil weight be benchmark, 20min is stirred with the speed of 40r/min, leave standstill 26h, with the centrifugation 20min of 4000r/min, get supernatant liquor, the 2wt% water that to add with Rice bran crude oil weight be benchmark, 20min is stirred with the speed of 40r/min, leave standstill 5h, with the centrifugation 20min of 4000r/min, get supernatant liquor, vacuum hydro-extraction is dry, dewaxing, decolouring, deodorization obtains high-quality Rice pollard oil.
Embodiment 2
A preparation method for high-quality Rice pollard oil, comprises the steps:
S1, fresh-keeping rice bran: be 14wt% by moisture content, 40 object rice brans are placed in extruder, be warming up to 100 DEG C, the diameter extruding fenestra is 16mm, extruding puffing is carried out with the speed of 110r/min, be cooled to room temperature, the 0.05wt% vitamin-E that to spray with rice bran weight be benchmark, mixing obtain fresh-keeping after rice bran;
S2, lixiviate Rice bran crude oil: by obtain in S1 fresh-keeping after rice bran add in ethanol, warming-in-water to 60 DEG C, under ultrasonic power is 600W, ultrasonic 30min, suction filtration, rotary evaporation obtains Rice bran crude oil, and wherein, the rice bran after fresh-keeping and the weightmeasurement ratio of ethanol are (g/ml) 1:7;
S3, refining: by the Rice bran crude oil obtained in S2, be warming up to 25 DEG C, the 4wt% di-methylcarbinol amine that to add with Rice bran crude oil weight be benchmark, 120min is stirred with the speed of 500r/min, with the centrifugation 30min of 4000r/min, get supernatant liquor, be warming up to 85 DEG C, the 6wt% water that to add with Rice bran crude oil weight be benchmark, 30min is stirred with the speed of 20r/min, leave standstill 22h, with the centrifugation 10min of 6000r/min, get supernatant liquor, the 4wt% water that to add with Rice bran crude oil weight be benchmark, 30min is stirred with the speed of 20r/min, leave standstill 3h, with the centrifugation 10min of 6000r/min, get supernatant liquor, vacuum hydro-extraction is dry, dewaxing, decolouring, deodorization obtains high-quality Rice pollard oil.
Embodiment 3
A preparation method for high-quality Rice pollard oil, comprises the steps:
S1, fresh-keeping rice bran: be 15wt% by moisture content, 35 object rice brans are placed in extruder, be warming up to 105 DEG C, the diameter extruding fenestra is 16mm, extruding puffing is carried out with the speed of 115r/min, be cooled to room temperature, the 0.045wt% vitamin-E that to spray with rice bran weight be benchmark, mixing obtain fresh-keeping after rice bran;
S2, lixiviate Rice bran crude oil: by obtain in S1 fresh-keeping after rice bran add in the mixed solvent of Virahol and ethanol, warming-in-water to 58 DEG C, under ultrasonic power is 670W, ultrasonic 45min, suction filtration, rotary evaporation obtains Rice bran crude oil, wherein, rice bran after fresh-keeping and the weightmeasurement ratio of mixed solvent are (g/ml) 1:6.5, and the volume ratio of Virahol and ethanol is 1:0.8;
S3, refining: by the Rice bran crude oil obtained in S2, be warming up to 32 DEG C, the 2.5wt% di-methylcarbinol amine that to add with Rice bran crude oil weight be benchmark, 105min is stirred with the speed of 650r/min, with the centrifugation 23min of 5500r/min, get supernatant liquor, be warming up to 89 DEG C, the 4.5wt% water that to add with Rice bran crude oil weight be benchmark, 23min is stirred with the speed of 35r/min, leave standstill 25h, with the centrifugation 18min of 4500r/min, get supernatant liquor, the 2.5wt% water that to add with Rice bran crude oil weight be benchmark, 23min is stirred with the speed of 35r/min, leave standstill 4.5h, with the centrifugation 18min of 4500r/min, get supernatant liquor, vacuum hydro-extraction is dry, dewaxing, decolouring, deodorization obtains high-quality Rice pollard oil.
Embodiment 4
A preparation method for high-quality Rice pollard oil, comprises the steps:
S1, fresh-keeping rice bran: be 16wt% by moisture content, 27 object rice brans are placed in extruder, be warming up to 115 DEG C, the diameter extruding fenestra is 14mm, extruding puffing is carried out with the speed of 125r/min, be cooled to room temperature, the 0.035wt% vitamin-E that to spray with rice bran weight be benchmark, mixing obtain fresh-keeping after rice bran;
S2, lixiviate Rice bran crude oil: by obtain in S1 fresh-keeping after rice bran add in the mixed solvent of Virahol and ethanol, warming-in-water to 52 DEG C, under ultrasonic power is 630W, ultrasonic 35min, suction filtration, rotary evaporation obtains Rice bran crude oil, wherein, rice bran after fresh-keeping and the weightmeasurement ratio of mixed solvent are (g/ml) 1:5.5, and the volume ratio of Virahol and ethanol is 1:1.2;
S3, refining: by the Rice bran crude oil obtained in S2, be warming up to 28 DEG C, the 3.5wt% di-methylcarbinol amine that to add with Rice bran crude oil weight be benchmark, 115min is stirred with the speed of 550r/min, with the centrifugation 27min of 4500r/min, get supernatant liquor, be warming up to 87 DEG C, the 5.5wt% water that to add with Rice bran crude oil weight be benchmark, 27min is stirred with the speed of 25r/min, leave standstill 23h, with the centrifugation 12min of 5500r/min, get supernatant liquor, the 3.5wt% water that to add with Rice bran crude oil weight be benchmark, 27min is stirred with the speed of 25r/min, leave standstill 3.5h, with the centrifugation 12min of 5500r/min, get supernatant liquor, vacuum hydro-extraction is dry, dewaxing, decolouring, deodorization obtains high-quality Rice pollard oil.
Embodiment 5
A preparation method for high-quality Rice pollard oil, comprises the steps:
S1, fresh-keeping rice bran: be 16.5wt% by moisture content, 32 object rice brans are placed in extruder, be warming up to 110 DEG C, the diameter extruding fenestra is 15mm, extruding puffing is carried out with the speed of 120r/min, be cooled to room temperature, the 0.04wt% vitamin-E that to spray with rice bran weight be benchmark, mixing obtain fresh-keeping after rice bran;
S2, lixiviate Rice bran crude oil: by obtain in S1 fresh-keeping after rice bran add in the mixed solvent of Virahol and ethanol, warming-in-water to 55 DEG C, under ultrasonic power is 650W, ultrasonic 40min, suction filtration, rotary evaporation obtains Rice bran crude oil, wherein, rice bran after fresh-keeping and the weightmeasurement ratio of mixed solvent are (g/ml) 1:6, and the volume ratio of Virahol and ethanol is 1:1;
S3, refining: by the Rice bran crude oil obtained in S2, be warming up to 30 DEG C, the 3wt% di-methylcarbinol amine that to add with Rice bran crude oil weight be benchmark, 110min is stirred with the speed of 600r/min, with the centrifugation 25min of 5000r/min, get supernatant liquor, be warming up to 88 DEG C, the 5wt% water that to add with Rice bran crude oil weight be benchmark, 25min is stirred with the speed of 30r/min, leave standstill 24h, with the centrifugation 15min of 5000r/min, get supernatant liquor, the 3wt% water that to add with Rice bran crude oil weight be benchmark, 25min is stirred with the speed of 30r/min, leave standstill 4h, with the centrifugation 15min of 5000r/min, get supernatant liquor, vacuum hydro-extraction is dry, dewaxing, decolouring, deodorization obtains high-quality Rice pollard oil.
Detect embodiment 1-5, its result is as shown in the table:
As can be seen from the above table, thiaminogen content of the present invention is high, Rice pollard oil quality better.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (6)
1. a preparation method for high-quality Rice pollard oil, is characterized in that, comprises the steps:
S1, fresh-keeping rice bran: rice bran is placed in extruder, be warming up to 100-120 DEG C, the diameter extruding fenestra is 14-16mm, extruding puffing is carried out with the speed of 110-130r/min, be cooled to room temperature, spray the 0.03-0.05wt% vitamin-E that is benchmark with rice bran weight, mixing obtain fresh-keeping after rice bran;
S2, lixiviate Rice bran crude oil: by obtain in S1 fresh-keeping after rice bran add in solvent, warming-in-water to 50-60 DEG C, under ultrasonic power is 600-700W, ultrasonic 30-50min, suction filtration, rotary evaporation obtains Rice bran crude oil;
S3, refining: by the Rice bran crude oil obtained in S2, be warming up to 25-35 DEG C, the 2-4wt% di-methylcarbinol amine that to add with Rice bran crude oil weight be benchmark, stirs 100-120min with the speed of 500-700r/min, centrifugal, get supernatant liquor, be warming up to 85-90 DEG C, add water, stir 20-30min, leave standstill 22-26h, centrifugal, get supernatant liquor, add water, stir 20-30min, leave standstill 3-5h, centrifugal, get supernatant liquor, vacuum hydro-extraction is dry, and dewaxing, decolouring, deodorization obtain high-quality Rice pollard oil.
2. the preparation method of high-quality Rice pollard oil according to claim 1, it is characterized in that, in S1, the moisture content of rice bran is 14-17wt%, and rice bran is 20-40 order.
3., according to the preparation method of claim 1 or 2 described high-quality Rice pollard oils, it is characterized in that, in S2, the rice bran after fresh-keeping and the weightmeasurement ratio of solvent are (g/ml) 1:5-7.
4. the preparation method of high-quality Rice pollard oil according to any one of claim 1-3, it is characterized in that, in S2, solvent is one or both the mixture in Virahol, ethanol.
5. the preparation method of high-quality Rice pollard oil according to any one of claim 1-4, it is characterized in that, in S2, solvent is the mixture of Virahol and ethanol, and the volume ratio of Virahol and ethanol is 1:0.8-1.2.
6. the preparation method of high-quality Rice pollard oil according to any one of claim 1-5, it is characterized in that, in S3, by the Rice bran crude oil obtained in S2, be warming up to 28-32 DEG C, the 2.5-3.5wt% di-methylcarbinol amine that to add with Rice bran crude oil weight be benchmark, 105-115min is stirred with the speed of 550-650r/min, with the centrifugation 20-30min of 4000-6000r/min, get supernatant liquor, be warming up to 85-90 DEG C, the 4-6wt% water that to add with Rice bran crude oil weight be benchmark, 23-27min is stirred with the speed of 20-40r/min, leave standstill 23-25h, with the centrifugation 10-20min of 4000-6000r/min, get supernatant liquor, the 2-4wt% water that to add with Rice bran crude oil weight be benchmark, 23-27min is stirred with the speed of 20-40r/min, leave standstill 3.5-4.5h, with the centrifugation 10-20min of 4000-6000r/min, get supernatant liquor, vacuum hydro-extraction is dry, dewaxing, decolouring, deodorization obtains high-quality Rice pollard oil.
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| CN106367199A (en) * | 2016-11-03 | 2017-02-01 | 张兵闯 | Preparing process for millet oil |
| CN108641816A (en) * | 2018-05-09 | 2018-10-12 | 大连理工大学 | A method of extraction rice bran oil |
| CN109913314A (en) * | 2019-04-10 | 2019-06-21 | 北京工商大学 | A kind of method that mixed solvent extracts puffed rice bran grease |
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Application publication date: 20151125 |