CN102524429A - Method for refining nutritional millet bran oil - Google Patents
Method for refining nutritional millet bran oil Download PDFInfo
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- 244000062793 Sorghum vulgare Species 0.000 title claims abstract description 35
- 235000019713 millet Nutrition 0.000 title claims abstract description 35
- 235000016709 nutrition Nutrition 0.000 title claims abstract description 19
- 238000007670 refining Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 239000001509 sodium citrate Substances 0.000 claims abstract description 8
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims abstract description 8
- 238000005406 washing Methods 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 40
- KFZMGEQAYNKOFK-UHFFFAOYSA-N 2-propanol Substances CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 28
- 239000010779 crude oil Substances 0.000 claims description 24
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 10
- 238000003672 processing method Methods 0.000 claims description 7
- 239000000084 colloidal system Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 239000007853 buffer solution Substances 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- XPFJYKARVSSRHE-UHFFFAOYSA-K trisodium;2-hydroxypropane-1,2,3-tricarboxylate;2-hydroxypropane-1,2,3-tricarboxylic acid Chemical compound [Na+].[Na+].[Na+].OC(=O)CC(O)(C(O)=O)CC(O)=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O XPFJYKARVSSRHE-UHFFFAOYSA-K 0.000 claims description 2
- GVJHHUAWPYXKBD-UHFFFAOYSA-N (±)-α-Tocopherol Chemical compound OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-UHFFFAOYSA-N 0.000 abstract description 42
- 229930003427 Vitamin E Natural products 0.000 abstract description 21
- WIGCFUFOHFEKBI-UHFFFAOYSA-N gamma-tocopherol Natural products CC(C)CCCC(C)CCCC(C)CCCC1CCC2C(C)C(O)C(C)C(C)C2O1 WIGCFUFOHFEKBI-UHFFFAOYSA-N 0.000 abstract description 21
- 235000019165 vitamin E Nutrition 0.000 abstract description 21
- 229940046009 vitamin E Drugs 0.000 abstract description 21
- 239000011709 vitamin E Substances 0.000 abstract description 21
- 239000002253 acid Substances 0.000 abstract description 16
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000002904 solvent Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000000194 supercritical-fluid extraction Methods 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract 1
- AINBZKYUNWUTRE-UHFFFAOYSA-N ethanol;propan-2-ol Chemical compound CCO.CC(C)O AINBZKYUNWUTRE-UHFFFAOYSA-N 0.000 abstract 1
- 238000002386 leaching Methods 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- 235000019198 oils Nutrition 0.000 description 34
- 230000008569 process Effects 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 238000009874 alkali refining Methods 0.000 description 6
- 230000007935 neutral effect Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229930182558 Sterol Natural products 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 150000003904 phospholipids Chemical class 0.000 description 4
- 150000003432 sterols Chemical class 0.000 description 4
- 235000003702 sterols Nutrition 0.000 description 4
- 240000007594 Oryza sativa Species 0.000 description 3
- 235000007164 Oryza sativa Nutrition 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 235000009566 rice Nutrition 0.000 description 3
- 238000001256 steam distillation Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000010495 camellia oil Substances 0.000 description 2
- CEYULKASIQJZGP-UHFFFAOYSA-L disodium;2-(carboxymethyl)-2-hydroxybutanedioate Chemical compound [Na+].[Na+].[O-]C(=O)CC(O)(C(=O)O)CC([O-])=O CEYULKASIQJZGP-UHFFFAOYSA-L 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000002372 labelling Methods 0.000 description 2
- 239000006210 lotion Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 240000008415 Lactuca sativa Species 0.000 description 1
- OYHQOLUKZRVURQ-HZJYTTRNSA-N Linoleic acid Chemical compound CCCCC\C=C/C\C=C/CCCCCCCC(O)=O OYHQOLUKZRVURQ-HZJYTTRNSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- 241000270666 Testudines Species 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 108010050181 aleurone Proteins 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 235000020661 alpha-linolenic acid Nutrition 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000002402 anti-lipaemic effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 230000000975 bioactive effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- HVYWMOMLDIMFJA-DPAQBDIFSA-N cholesterol Chemical compound C1C=C2C[C@@H](O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2 HVYWMOMLDIMFJA-DPAQBDIFSA-N 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000009882 destearinating Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000008157 edible vegetable oil Substances 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 238000002481 ethanol extraction Methods 0.000 description 1
- 235000019197 fats Nutrition 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 235000019261 food antioxidant Nutrition 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 235000020778 linoleic acid Nutrition 0.000 description 1
- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 description 1
- 229960004488 linolenic acid Drugs 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- -1 oryzanol Substances 0.000 description 1
- 230000035790 physiological processes and functions Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000012045 salad Nutrition 0.000 description 1
- UFTFJSFQGQCHQW-UHFFFAOYSA-N triformin Chemical compound O=COCC(OC=O)COC=O UFTFJSFQGQCHQW-UHFFFAOYSA-N 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
- 150000003722 vitamin derivatives Chemical class 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Coloring Foods And Improving Nutritive Qualities (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention provides a method for refining nutritional millet bran oil. The method is suitable for processing nutritional millet bran oil by taking the crude millet bran oil obtained by CO2 supercritical extraction, press or solvent leaching as a raw material. The method comprises the following steps: adding a citric acid solution accounting for 0.2-0.4% of the oil weight into the crude millet bran oil and carrying out vacuum stirring to remove gums; taking 80-95% ethanol-isopropanol with the pH value of 5.0-6.5 as an extractant to deacidify degummed oil through vacuum stirring; and washing deacidified oil with a sodium citrate solution and clear water and drying and dewaxing the washed deacidified oil, thus obtaining the nutritional millet bran oil product. The method has the following advantages: the acid value of the obtained nutritional millet bran oil is below 2mgKOH/g; and the preservation rates of vitamin E and oryzanol in the oil are respectively above 85% and above 75%.
Description
Technical field
The present invention relates to the edible oil processing method, specifically be a kind of be the method for raw material refining processing millet cavings nutritional oil with millet cavings crude oil.
Background technology
The millet cavings is the accessory substance of millet processing millet process, is made up of pericarp, kind skin, aleurone and the rice plumule of millet.Discover: contain grease 14-16% in the millet ravine chaff.In millet cavings crude oil, unrighted acid accounts for 89.26% of total fatty acid content, and wherein linoleic acid content surpasses 70%, and oleic acid content is 14%, and alpha-linolenic acid content is 3-4%; In addition, also contain vitamin E 66-80 mg/100g, sterol 1.1-1.5%, oryzanol 0.3-0.5%.Oryzanol has the serum cholesterol of reduction, prevents physiological functions such as lipid oxidation, angiocardiopathy preventing, is soluble in alkalescence and neutral non-polar solution.Vitamin E is the necessary liposoluble vitamin of human body, also is natural food antioxidant.Therefore, edible millet cavings oil not only can satisfy the nutritional need of human body to necessary aliphatic acid and vitamin E, and has potential removing interior free yl, anti-oxidant and antilipemic healthy effect, has the excellent development prospect.
There are phosphatide and free fatty in the millet cavings crude oil, for guaranteeing the quality stability of product oil, must be through coming unstuck and deacidification process.Remove nonhydratable phosphatide and generally be employed under the normal pressure and add phosphoric acid or methods of citric acid, and come unstuck with deacidification in the normal pressure stir process can sneak into a large amount of oxygen, very easily cause the oxidation to the oxygen sensitive materials such as vitamin E, sterol, unrighted acid.For this reason, unit such as Henan Province's grain engineering designing institute adopts full negative pressure continued operation to produce salad oil in fat degumming, alkali refining, decolouring and deodorization refining; Also the someone adopts vacuum vaporization depickling (CN14689484) under the hot conditions.Yet, the destruction of causing heat-sensitive substances such as vitamin E under the hot conditions easily; In the refining overall process, full negative-pressure operation can strengthen power consumption and production cost.
Acid stripping method on the commercial production has methods such as alkali refining, distillation, solvent extraction and esterification, extensively adopt be alkali-refining deacidification method and steam distillation depickling method (being the physical refining method).The advantage of alkali refining method is simple to operate.Shortcoming is:
1.Soap stock can be taken most oryzanol in the oil out of, causes the loss of a large number of nutrients;
2.The affiliation that adds of alkali lye causes vitamin E and oryzanol isoreactivity material damage;
3.Contain a large amount of neutral oil in the soap stock that forms, cause the loss of neutral oil excessive.The physics way of distillation is utilize free fatty (FFA) and triglyceride relative volatility different, under high temperature, condition of high vacuum degree condition, carries out stripping by open steam, and overflows by the ratio of its dividing potential drop, to reduce a kind of technology of the FFA in the oil.The advantage of the method is: improved the grease yield.Shortcoming is;
1.Requirement to equipment and raw material is high, has high input;
2.Too high temperature is bigger to the destruction of some active materials such as vitamin E.
For avoiding the shortcoming of alkali-refining deacidification method and steam distillation depickling method, having patent (CN 101343593A) to adopt absolute methanol is that solvent carries out the depickling processing to the rice bran crude oil, when promoting oil quality, has increased oily yield again.The ethanol extraction depickling tea oil (CN101717689) of employing is also arranged, reduced the acid value of tea oil.The advantage of this extraction be neutral oil loss little, reduced of the pollution of salkali waste wash water to environment.But,, under normal pressure and PH neutrality or alkali condition,, still can cause a large amount of losses of bioactive ingredients such as oryzanol, vitamin E and sterol with methyl alcohol, ethanol equal solvent extraction depickling owing to contain enzymatic oxidation metal ions such as iron, copper ion in the crude oil.Through measuring, in the millet cavings oil with normal pressure solvent depickling method and the processing of steam distillation depickling method, oryzanol has only 60-70% with the storage rate of total vitamin E.
Vitamin E under acid condition to thermally-stabilised, unstable under alkaline aerobic conditions.In traditional alkali-refining deacidification process, the adding of alkali lye causes vitamin E and oryzanol to lose in a large number; And the destruction that high-temperature vapor distillation depickling meeting causes nutritional labelings such as vitamin E and sterol.
Summary of the invention
The object of the present invention is to provide a kind of nutritional labelings such as protection oryzanol, vitamin E and unrighted acid that have, effectively reduce the millet cavings nutritional oil refining processing method of acid value.
The refining processing method of a kind of millet cavings nutritional oil provided by the invention comprises the steps:
The first step: come unstuck: millet cavings crude oil is preheated to 55-65 ℃; The mass concentration that under 0.080-0.088MPa vacuum, adds the heavy 0.2-0.4% of crude oil then is 20% citric acid solution, stirs after the 3-5min, under 0.074-0.086MPa vacuum; Add while stirring phosphatide quality 0.4-1.0 in the crude oil doubly with hot water oily equality of temperature; Behind the vacuum stirring 20-40min,, remove the colloid of sub-cloud with the static insulation of normal pressure 5-7h;
Second step: depickling: the crude oil that comes unstuck is extracted depickling with ethanol-isopropyl alcohol mixed extractant; Condition: the mixed extractant consumption is the heavy 1-2 of crude oil times; Extraction temperature 25-35 ℃, vacuum 0.078-0.084MPa, mixing time 10-30min; The normal pressure standing demix separates and removes ethanol-isopropyl alcohol extraction phase afterwards; Above-mentioned deacidification repeats 2-4 time; Whipping process is controlled vacuum well, avoids the extractant boiling.
Described ethanol-isopropyl alcohol mixed extractant, its mass concentration are 85-95%, and wherein the mass ratio of isopropyl alcohol and ethanol is 1: 8～12; The pH value of said mixed extractant is adjusted to pH 5.0-6.5 with the citric acid-sodium citrate buffer solution;
The 3rd step: clean: with the sodium citrate solution of mass percentage concentration 0.05-0.15% to come unstuck, the cavings oil of depickling cleans 1-2 time, at every turn the consumption of sodium citrate solution be crude oil heavy 1/3～1/5; After washing, sodium citrate solution is washed till wash water pH 6.8-7.2 with clear water again;
The 4th step: dry and dewaxing:, the Water in oil amount is reduced to below 0.10% in 0.09-0.095MPa vacuum, 80-100 ℃ following vacuum drying; More than the 40h of normal pressure winterization below 4 ℃, centrifugal removal wax obtains millet cavings nutritional oil product.Its acid value below the 2mgKOH/g, the storage rate of vitamin E and oryzanol is respectively more than 85% and 75%.
Compared with prior art, the invention has the advantages that:
1., the present invention is coming unstuck, adopting vacuum condition in the whipping process of depickling, in non-whipping process, adopts condition of normal pressure, can reduce the oxidational losses of vitamin E, oryzanol and unrighted acid, can reduce energy resource consumption again.
2., adopt ethanol-isopropyl alcohol mixed extractant, deacidification effect is good.Discover, because the polarity of ethanol and isopropyl alcohol is different, after ethanol and isopropyl alcohol are with the certain proportion mixing; And be diluted with water to the mass concentration of 80-95% at a certain temperature; Can effectively extract the free fatty in the neutral oil, this deacidifying process is simple, and deacidification efficiency is high.Adopt subacidity ethanol-isopropyl alcohol extractant of pH 5.0-6.5, also help protecting vitamin E and oryzanol.
3., adopt sodium citrate solution that depickling oil is cleaned, in neutralization oil in the residual acid, can also play the effect that huge legendary turtle is closed metal ions such as iron in the oil, and can reduce the washing water consumption.
This method also can be used for the refining processing of other nutritive vegetable oil.
The specific embodiment
Embodiment 1:
Get the millet cavings crude oil 500g that the solvent lixiviation process obtains, acid value is 9mgKOH/g, and the content of vitamin E and oryzanol is respectively 765mg/kg and 0.35%, content of phospholipid 1.5%.After crude oil injected purifier heated sealed to 55 ℃, be evacuated down to 0.086MPa vacuum, add 20% citric acid solution
2G behind the stirring 3min, adds 55 ℃ of hot water of 3g (content of phospholipid is 0.4 times in the oil), under 0.080MPa vacuum, stirs 35min; 5h is left standstill in the normal pressure insulation, removes the colloid of sub-cloud.Degummed oil adds that the pH value is 6.0, concentration is that (ethanol: isopropyl alcohol=9: 1), 35 ℃ of following vacuum hydro-extraction depicklings 2 times, vacuum remains on 0.078-0.080MPa for ethanol-isopropyl alcohol extractant of 85%; It is 900 g that the extractant of each depickling adds weight, and the vacuum stirring time of each extraction is 30min; Stir end back normal pressure and leave standstill about 1 hour, separate and remove the sub-cloud extraction phase.Oil phase after the depickling cleans 1 time with the natrium citricum washing lotion of 150g mass concentration 0.15%; Be washed till wash water pH 7.0-7.2 with clear water again; Cavings oil behind the separation removal wash water layer is reduced to below 0.10% the Water in oil amount in 0.09-0.095MPa vacuum and 95-100 ℃ of following vacuum drying.Behind the dried millet cavings winterizing 50-60h, centrifugal removal wax, the millet cavings nutritional oil finished product that obtains.Compare with crude oil, the product oil outward appearance is limpid bright, and acid value is 0.90 mgKOH/g, and vitamin E and oryzanol content are respectively 697mg/kg and 0.29%.
Embodiment 2:
Get CO
2The millet cavings crude oil 800g that supercritical extraction obtains, acid value is 14mgKOH/g, the content of vitamin E and oryzanol is respectively 883mg/kg and 0.42%, content of phospholipid 0.8%.Millet cavings crude oil is injected equipment for vacuum refining; Suction is to 0.080 MPa after being heated to 65 ℃; Adding 3.0g concentration is 20% citric acid solution, adds 65 ℃ of hot water of 5.1g (content of phospholipid is 0.8 times in the crude oil) behind the stirring 4min, under 0.074MPa vacuum, stirs 20min; After 6h is left standstill in the normal pressure insulation, remove the sub-cloud colloid; The crude oil that comes unstuck adds that the pH value is 5.5, concentration does
9(ethanol: isopropyl alcohol=12: 1), the extraction depickling is 3 times under 25 ℃, 0.080-0.082MPa vacuum, and it is 1200g that each extractant adds weight for 5% ethanol-isopropyl alcohol extractant; 20min is stirred in each extraction, and after the extraction, normal pressure leaves standstill, and removes lower floor's extraction phase after the layering.Oil phase after the depickling cleans 2 times with the natrium citricum washing lotion 250g of mass concentration 0.10%, uses clear water to be washed till wash water pH again and is 6.8-7.0.Cavings oil behind the separation wash water is reduced to below 0.10% the Water in oil amount in 0.095MPa vacuum and 92-96 ℃ of following vacuum drying.Dried millet oil extracted from rice husks winterization 60-70h, centrifugal removal wax obtains as clear as crystal millet cavings nutritional oil finished product.This product oil acid value is 1.2mgKOH/g, and vitamin E and oryzanol content are respectively 805mg/kg and 0.35%.
Claims (3)
1. the refining processing method of a millet cavings nutritional oil is characterized in that comprising the steps:
The first step: come unstuck: millet cavings crude oil is preheated to 55-65 ℃; The mass concentration that under 0.080-0.088MPa vacuum, adds the heavy 0.2-0.4% of crude oil then is 20% citric acid solution, stirs after the 3-5min, under 0.074-0.086MPa vacuum; Add while stirring phosphatide quality 0.4-1.0 in the crude oil doubly with hot water oily equality of temperature; Behind the vacuum stirring 20-40min,, remove the colloid of sub-cloud with the static insulation of normal pressure 5-7h;
Second step: depickling: the crude oil that comes unstuck is extracted depickling with ethanol-isopropyl alcohol mixed extractant; Condition: the mixed extractant consumption is the heavy 1-2 of crude oil times; Extraction temperature 25-35 ℃, vacuum 0.078-0.084MPa, mixing time 10-30min; The normal pressure standing demix separates and removes ethanol-isopropyl alcohol extraction phase afterwards; Above-mentioned deacidification repeats 2-4 time;
The 3rd step: clean: with the sodium citrate solution of mass percentage concentration 0.05-0.15% to come unstuck, the cavings oil of depickling cleans 1-2 time, at every turn the consumption of sodium citrate solution be crude oil heavy 1/3～1/5; After washing, sodium citrate solution is washed till wash water pH 6.8-7.2 with clear water again;
The 4th step: dry and dewaxing:, the Water in oil amount is reduced to below 0.10% in 0.09-0.095MPa vacuum, 80-100 ℃ following vacuum drying; More than the 40h of normal pressure winterization below 4 ℃, centrifugal removal wax obtains millet cavings nutritional oil product.
2. the refining processing method of millet cavings nutritional oil according to claim 1 is characterized in that, described ethanol-isopropyl alcohol mixed extractant, and its mass concentration is 85-95%, wherein the mass ratio of isopropyl alcohol and ethanol is 1: 8～12.
3. the refining processing method of millet cavings nutritional oil according to claim 2 is characterized in that, the pH value of said mixed extractant is adjusted to pH 5.0-6.5 with the citric acid-sodium citrate buffer solution.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104178336A (en) * | 2014-08-29 | 2014-12-03 | 邹平健源油脂有限公司 | Preparation method of millet bran oil |
| CN105087136A (en) * | 2015-06-26 | 2015-11-25 | 蚌埠市江淮粮油有限公司 | Preparation method for high-quality rice bran oil |
| CN105400592A (en) * | 2015-12-29 | 2016-03-16 | 上海韬鸿化工科技有限公司 | Squeezing preparation method of 6S1D soybean oil |
| CN106213386A (en) * | 2016-07-25 | 2016-12-14 | 福建省神蜂科技开发有限公司 | A kind of bee glue soft capsule and preparation method thereof |
| CN106967504A (en) * | 2017-05-25 | 2017-07-21 | 国网河南省电力公司电力科学研究院 | A kind of natural esters insulating oil extracts alkali refining mixing acid stripping method |
| CN107629865A (en) * | 2017-11-08 | 2018-01-26 | 山东好当家海洋发展股份有限公司 | A kind of enzymolysis solvent extraction process of squid liver grease |
| CN107874258A (en) * | 2017-11-21 | 2018-04-06 | 荣成海锐芯生物科技有限公司 | A kind of method for preparing cod liver oil capsule using thick cod-liver oil extract |
| CN108208506A (en) * | 2018-01-18 | 2018-06-29 | 浙江省柑桔研究所 | A kind of millet cavings beverage and preparation method thereof |
| CN108690717A (en) * | 2018-06-28 | 2018-10-23 | 山东方与食品有限公司 | A kind of refining of crude rice bran oil method for transformation |
| CN110760383A (en) * | 2019-12-10 | 2020-02-07 | 海南省粮油科学研究所 | Deacidification, decoloration and debitterizing method of crabapple seed crude oil |
| CN110760382A (en) * | 2019-12-10 | 2020-02-07 | 海南省粮油科学研究所 | Refining method of crabapple seed crude oil |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104178336A (en) * | 2014-08-29 | 2014-12-03 | 邹平健源油脂有限公司 | Preparation method of millet bran oil |
| CN105087136A (en) * | 2015-06-26 | 2015-11-25 | 蚌埠市江淮粮油有限公司 | Preparation method for high-quality rice bran oil |
| CN105400592A (en) * | 2015-12-29 | 2016-03-16 | 上海韬鸿化工科技有限公司 | Squeezing preparation method of 6S1D soybean oil |
| CN106213386A (en) * | 2016-07-25 | 2016-12-14 | 福建省神蜂科技开发有限公司 | A kind of bee glue soft capsule and preparation method thereof |
| CN106967504A (en) * | 2017-05-25 | 2017-07-21 | 国网河南省电力公司电力科学研究院 | A kind of natural esters insulating oil extracts alkali refining mixing acid stripping method |
| CN106967504B (en) * | 2017-05-25 | 2020-07-03 | 国网河南省电力公司电力科学研究院 | Natural ester insulating oil extraction-alkali refining mixed deacidification method |
| CN107629865A (en) * | 2017-11-08 | 2018-01-26 | 山东好当家海洋发展股份有限公司 | A kind of enzymolysis solvent extraction process of squid liver grease |
| CN107874258A (en) * | 2017-11-21 | 2018-04-06 | 荣成海锐芯生物科技有限公司 | A kind of method for preparing cod liver oil capsule using thick cod-liver oil extract |
| CN108208506A (en) * | 2018-01-18 | 2018-06-29 | 浙江省柑桔研究所 | A kind of millet cavings beverage and preparation method thereof |
| CN108690717A (en) * | 2018-06-28 | 2018-10-23 | 山东方与食品有限公司 | A kind of refining of crude rice bran oil method for transformation |
| CN110760383A (en) * | 2019-12-10 | 2020-02-07 | 海南省粮油科学研究所 | Deacidification, decoloration and debitterizing method of crabapple seed crude oil |
| CN110760382A (en) * | 2019-12-10 | 2020-02-07 | 海南省粮油科学研究所 | Refining method of crabapple seed crude oil |
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