CN101781605B - Refining method of rice bran oil - Google Patents
Refining method of rice bran oil Download PDFInfo
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- CN101781605B CN101781605B CN2010101097398A CN201010109739A CN101781605B CN 101781605 B CN101781605 B CN 101781605B CN 2010101097398 A CN2010101097398 A CN 2010101097398A CN 201010109739 A CN201010109739 A CN 201010109739A CN 101781605 B CN101781605 B CN 101781605B
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Abstract
The invention relates to a refining method of rice bran oil, which adopts crude rice bran oil as raw oil. The rice bran oil is obtained through the procedures such as degumming, oil-foot separation, dewaxing, decoloration, high-temperature deacidification and deodorization, freezing and degreasing. The weaknesses of the traditional refining method that during the degumming, the neutral oil loss is large, partial neutral oil is neutralized by NaOH during the deacidification process and free-fatty acid process yield of the oil grease is reduced are overcame. A combination-type deacidification is adopted during the high-temperature deacidification process, and the acid value can be reduced to 3 through one-time physical deacidification. The utilization rate of the raw material and the product yield are improved, and the environmental pollution caused by the chemical refining can be greatly reduced. The deacidification process is free from the chemical reaction, so the loss of the oil grease is reduced, and the refining rate of the oil grease is improved. The consumption of the auxiliary raw materials and the labor can be reduced, and the price of the distilled fatty acid is better than that of the acidification oil; therefore, not only the production cost is reduced, but also the economic benefit is improved.
Description
Technical field
The invention belongs to the method for refining of edible oil refinement technique, particularly a kind of Rice pollard oil.
Background technology
Rice bran not only has high-load essential fatty acid and protein, also contains other anticancer and sanatory functional mass of ability, and like food fibre, VITAMINs, thiaminogen, mineral substance etc. are a kind of high additional resources that potentiality to be exploited is arranged very much.
Refining rice bran oil extracts from the rice bran crude oil; But contain heat-sensitive substance and wax and lipolytic enzymes such as free fatty acids, phosphatide, pigment, residue phenol and thiaminogen in the rice bran crude oil, the existence of these materials has increased the difficulty of refining of crude rice bran oil and the loss of neutral oil greatly.Especially the existence of lipolytic enzyme makes that the acid value of rice bran crude oil is very high, the acid value of the rice bran crude oil after the long-term storage even can reach 30mg/g.
In traditional refining of crude rice bran oil method the method for depickling be oil at a certain temperature, add in the free fatty acids in NaOH solution and the oil and generate lipid acid and receive salt (being commonly called as soap stock), reach the purpose of reduction acid value.But in free fatty acids in, part neutral oil also by NaOH neutralization, has so just reduced greasy yield rate.Yet, when soap stock is handled in comprehensive utilization, add 98% the vitriol oil again and make it be reduced into lipid acid (being commonly called as acidifying oil), so increased production cost.In addition, existing technology can not processing highly acidic oil.
Summary of the invention
To the deficiency of above-mentioned similar technology, the purpose of this invention is to provide a kind of method of refining of Rice pollard oil, superior product quality, production efficiency is high.
The objective of the invention is to realize through following technical scheme; A kind of method of refining of Rice pollard oil is a raw oil with the rice bran crude oil, comprise come unstuck, oil foot (soap) separates; Decolouring, deacid-deodoring, degreasing; It is characterized in that, said technology be followed successively by come unstuck → obtain Rice pollard oil after oil foot (soap) separation → dewaxing → decolouring → high temperature depickling, deodorization → freezing degreasing, concrete technology is following:
Said coming unstuck is the wetting ability of utilizing peptized impurities, and deep fat is under the effect of stirring, and adding concentration is 85%; Amount is heavy 0.05-0.2% phosphoric acid of oil and hot water (amount is 2-3 times of phospholipids content in the oil), and the assorted polarity of glue increases water-swelling; Oil soluble reduces, and severe increases, and from oil, separates out separation; Wherein, guarantee that temperature environment is 30 ℃ of initial temperature, temperature is 60 ℃ eventually.
Said oil foot (soap) separates, and we adopt the isolating method of whizzer, is about to continuous processing and combines with batch technology, shortens the process time, promotes the yield rate of finished product.
Said dewaxing is to reduce the physical property that diminishes according to wax and greasy fusing point difference and the solubility with temperature of wax in oil, separates out crystal wax through cooling, reaches oily wax and separates through filtering.Content of wax grease is in the crystallisation by cooling process, and the size of gained wax crystal grain directly influences separating effect, is cooling rate and influence the big or small principal element of wax crystal grain, so cooling rate was controlled in 1-24 hour, cooling rate is 2 ℃/h; In 24-48 hour, cooling rate is controlled at 0.5 ℃/h; In 48-72 hour, cooling rate is 1-2 ℃/h, stirring velocity 10-13r/min.Filter and adopt flame filter press, filtration temperature 15-20 ℃, filter pressure maintains 0.2-0.35MPa.
Atlapulgite is added in said decolouring, oil temperature in the time of 91 ℃, add to be warming up to 98 ℃ after finishing, the oily temperature drop to 75 ℃ of decolour after 30 minutes, filtration.
The physical deacidification method is adopted in said high temperature depickling, deodorization.On the technology, built-up type deacidifying device (this device patent applied for, Granted publication number: CN201390737Y, Granted publication day: 2010.1.27), comprise female tower and attach tower have been adopted.At first, the open vacuum pump after vacuum reaches requirement (below the 0.075MPa), to the extracting tower oiling, when extracting tower bottom oil level reaches 50%, stops oiling successively, starts the self-circulation heating, i.e. partial circulating is at female tower internal recycle.When oily temperature reaches 200 ℃ in the extracting tower, open the extracting tower open steam and stir stripping.Simultaneously, start the lipid acid recycle pump and carry out the lipid acid circularly trapping, internal circulating load is 3500-4000L/h.
Stir the suitable steam regulation pressure of situation according to grease in the tower, pressure generally is controlled at 0.05-0.1MPa, and logical vapour amount is that oil weighs about 4%.When temperature in reaches 245 ℃, change systemic circulation into, in the promptly whole depickling system, comprise tubular type flash system, primary and secondary combined system, sampling and measuring FFA% and color and luster in the salad oil exit.Qualified back (reaching GB respective level standard), fuel-displaced to the irrigated area; Defective, continue to change into partial circulating, till qualified.Normally fuel-displaced, oily temperature remains on 245 ℃-260 ℃.
Said freezing degreasing, degreasing are that separate solid fat, raising liquid oil sharpness are the technological process of aim.Its equipment is according to the different and difference to some extent of selected degreasing process.Conventional skimming equipment is identical with dewaxing equipment, and method is close, and skimming temp will be lower than dewaxing temperature, and the isolating solid fat of the low more institute of oily temperature is many more, and the general oily temperature of Rice pollard oil is reduced to 3 ℃, leaves standstill 24 hours after-filtration, and filtration temperature remains on 6 ℃.
Advantage of the present invention: when coming unstuck, owing to the time that oil-soap is settlement separate is longer, generally need 6-8 hour, and the neutral oil loss is big, we adopt the method for spinning only to need 1 hour, have promptly shortened the process time, have promoted the yield rate of finished product again.
In high temperature depickling (high acid value crude oil production level Four oil) process, adopted the built-up type deacidifying device, through disposable physical deacidification, acid value can be reduced to about 3.Not only improved raw-material utilization ratio and product yield rate, and greatly reduced and utilize chemical refining pollution that environment caused.Chemical reaction does not take place in deacidification, has reduced oil loss, has improved the oil and fat refining rate.Auxiliary material (NaOH and dense H have been reduced
2SO
4) and the consumption of manpower, moreover distillatory lipid acid price be superior to acidifying oil price lattice, therefore not only reduced production cost, but also improved economic benefit.
Embodiment
Following enforcement can illustrate in greater detail the present invention, but does not limit the present invention in any form.
Embodiment 1: with the rice bran crude oil is raw oil, comprise come unstuck, oil foot (soap) separates, decolouring, deacid-deodoring, degreasing, said technology be followed successively by come unstuck → obtain Rice pollard oil after oil foot (soap) separation → dewaxing → decolouring → high temperature depickling, deodorization → freezing degreasing.Concrete technology is following:
Said coming unstuck is the wetting ability of utilizing peptized impurities, and deep fat adds a certain amount of electrolyte solution and hot water under the effect of stirring; The assorted polarity of glue increases, water-swelling, and oil soluble reduces, and severe increases; From oil, separate out separation, wherein, guarantee that temperature environment is 30 ℃ of initial temperature, temperature is 60 ℃ eventually.
Said oil foot (soap) separates, and we adopt the isolating method of whizzer, is about to continuous processing and combines with batch technology, shortens the process time, promotes the yield rate of finished product.
Said dewaxing is to reduce the physical property that diminishes according to wax and greasy fusing point difference and the solubility with temperature of wax in oil, separates out crystal wax through cooling, reaches oily wax and separates through filtering.Content of wax grease is in the crystallisation by cooling process, and the size of gained wax crystal grain directly influences separating effect, is cooling rate and influence the big or small principal element of wax crystal grain, so cooling rate was controlled in 1-24 hour, cooling rate is 2 ℃/hour; In 24-48 hour, cooling rate is controlled at 0.5 ℃/hour; In 48-72 hour, cooling rate is 1-2 ℃/hour, stirring velocity 10-13r/min.Filter and adopt flame filter press, filtration temperature 15-20 ℃, filter pressure maintains 0.2-0.35MPa.
Atlapulgite is added in said decolouring, oil temperature in the time of 91 ℃, add to be warming up to 98 ℃ after finishing, the oily temperature drop to 75 ℃ of decolour after 30 minutes, filtration.
The physical deacidification method is adopted in said high temperature depickling, deodorization.On the technology, built-up type deacidifying device (this device patent applied for, Granted publication number: CN201390737Y, Granted publication day: 2010.1.27), comprise female tower and attach tower have been adopted.At first, the open vacuum pump after vacuum reaches requirement (below the 0.075MPa), to the extracting tower oiling, when extracting tower bottom oil level reaches 50%, stops oiling successively, starts the self-circulation heating, i.e. partial circulating is at female tower internal recycle.When oily temperature reaches 200 ℃ in the extracting tower, open the extracting tower open steam and stir stripping.Simultaneously, start the lipid acid recycle pump and carry out the lipid acid circularly trapping, internal circulating load is 3500-4000L/h.
Stir the suitable steam regulation pressure of situation according to grease in the tower, pressure generally is controlled at 0.05-0.1MPa, and logical vapour amount is that oil weighs about 4%.When temperature in reaches 245 ℃, change systemic circulation into, in the promptly whole depickling system, comprise tubular type flash system, primary and secondary combined system, sampling and measuring FFA% and color and luster in the salad oil exit.Qualified back (reaching GB respective level standard), fuel-displaced to the irrigated area; Defective, continue to change into partial circulating, till qualified.Normally fuel-displaced, oily temperature remains on 245 ℃-260 ℃.
Said freezing degreasing, degreasing are that separate solid fat, raising liquid oil sharpness are the technological process of aim.Its equipment is according to the different and difference to some extent of selected degreasing process.Conventional skimming equipment is identical with dewaxing equipment, and method is close, and skimming temp will be lower than dewaxing temperature, and the isolating solid fat of the low more institute of oily temperature is many more, and the general oily temperature of Rice pollard oil is reduced to 3 ℃, leaves standstill 24 hours after-filtration, and filtration temperature remains on 6 ℃.
Claims (2)
1. the method for refining of a Rice pollard oil; With the rice bran crude oil is raw oil; Comprise come unstuck, oil foot separates, decolouring, deacid-deodoring, degreasing is characterized in that; Said technology be followed successively by come unstuck → obtain Rice pollard oil after the oil foot separation → dewaxing → decolouring → high temperature depickling, deodorization → freezing degreasing, concrete technology is following:
Said coming unstuck, deep fat are under the effect of stirring, and adding hot water and concentration are 85% phosphoric acid, and wherein the amount of phosphoric acid is the heavy 0.05-0.2% of oil; The amount of hot water is 2-3 a times of phospholipids content in the oil, and the assorted polarity of glue increases water-swelling; Oil soluble reduces, and severe increases, and from oil, separates out separation; Wherein, guarantee that temperature environment is 30 ℃ of initial temperature, temperature is 60 ℃ eventually;
Said oil foot separates, and adopts the isolating method of whizzer, and continuous processing is combined with batch technology;
Said dewaxing is separated out crystal wax through cooling, reaches oily wax separation through filtering;
Atlapulgite is added in said decolouring, oil temperature in the time of 91 ℃, add to be warming up to 98 ℃ after finishing, the oily temperature drop to 75 ℃ of decolour after 30 minutes, filtration;
Said high temperature depickling, deodorization, utilization physical deacidification method adopts the built-up type deacidifying device, comprises female tower and attaches tower; At first, open vacuum pump successively is when vacuum is that 0.075MPa is when following, to the extracting tower oiling; When extracting tower bottom oil level reaches 50%, stop oiling, start the self-circulation heating, i.e. partial circulating; At female tower internal recycle, when oily temperature reaches 200 ℃ in the extracting tower, open the extracting tower open steam and stir stripping; Simultaneously, start the lipid acid recycle pump and carry out the lipid acid circularly trapping, internal circulating load is 3500-4000L/h;
Stir situation steam regulation pressure according to grease in the tower, pressure-controlling is at 0.05-0.1MPa, and logical vapour amount is that oil weighs 4%, when temperature in reaches 245 ℃; Change systemic circulation into, promptly whole depickling system internal recycle comprises tubular type flash system, primary and secondary combined system, the percentage of the sampling and measuring FFA color and luster when in the salad oil exit; After qualified, fuel-displaced to the irrigated area, defective, continue to change into partial circulating; Till qualified, normally fuel-displaced, oily temperature remains on 245 ℃-260 ℃;
Said freezing degreasing, degreasing be with separate solid fat, to improve the liquid oil sharpness be the technological process of aim; Its equipment is that conventional skimming equipment is identical with dewaxing equipment according to the different and difference to some extent of selected degreasing process, and method is close; Skimming temp will be lower than dewaxing temperature, and the isolating solid fat of the low more institute of oily temperature is many more, and Rice pollard oil oil temperature is reduced to 3 ℃; Leave standstill 24 hours after-filtration, filtration temperature remains on 6 ℃.
2. the method for refining of a kind of Rice pollard oil according to claim 1, it is characterized in that: in the said dewaxing step, content of wax grease is in the crystallisation by cooling process, and cooling rate was controlled in 1-24 hour, and cooling rate is 2 ℃/h; In 24-48 hour, cooling rate is controlled at 0.5 ℃/h; In 48-72 hour, cooling rate is 1-2 ℃/h; Stirring velocity 10-13r/min filters and adopts flame filter press, and filtration temperature 15-20 ℃, filter pressure maintains 0.2-0.35MPa.
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| CN2010101097398A CN101781605B (en) | 2010-02-05 | 2010-02-05 | Refining method of rice bran oil |
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| CN101781605B true CN101781605B (en) | 2012-08-08 |
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| CN101985579B (en) * | 2010-11-15 | 2012-06-27 | 江苏永林油脂化工有限公司 | Method for decoloring fatty acid physically refined from rice bran oil |
| CN102399630B (en) * | 2011-09-29 | 2013-06-05 | 武汉工业学院 | Technology for refined rice bran oil rich in oryzanol |
| CN102492546B (en) * | 2011-12-05 | 2013-09-11 | 武汉工业学院 | Rice bran oil refinement and byproduct production method |
| CN102676294B (en) * | 2012-05-22 | 2014-01-08 | 湖北省老河口市劲旺油脂加工有限公司 | Dewaxing method of rice oil |
| CN102690723A (en) * | 2012-06-25 | 2012-09-26 | 江苏迈克化工机械有限公司 | Production method of edible rice bran oil |
| CN103710143A (en) * | 2012-09-28 | 2014-04-09 | 北京中天金谷粮油工程技术有限公司 | Edible oil semi-continuous refining technology |
| CN103409236B (en) * | 2013-09-03 | 2014-07-16 | 河南粮工科技有限公司 | Combined type deacidification and deodorization tower suitable for deodorizing edible oil in oil industry |
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| CN104004587B (en) * | 2013-10-31 | 2016-05-11 | 菏泽中禾健元生物科技有限公司 | A kind of method of Dewaxing of Rice Bran |
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| CN105861145A (en) * | 2016-06-15 | 2016-08-17 | 高安市清河油脂有限公司 | Refining process for rice bran oil |
| CN109837136A (en) * | 2017-11-28 | 2019-06-04 | 中国科学院青岛生物能源与过程研究所 | A kind of method of Dewaxing of Rice Bran degreasing |
| CN108795573A (en) * | 2018-06-26 | 2018-11-13 | 安徽谷天下食品有限公司 | A kind of rice bran oil degreasing cooling means |
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| CN110801643B (en) * | 2019-11-19 | 2021-10-19 | 四川丁点儿食品开发股份有限公司 | Device and method for removing bitter taste of pepper extract |
| CN113637525A (en) * | 2021-08-31 | 2021-11-12 | 湖北省现代农业有限公司 | Degreasing method for improving rice oil quality |
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Effective date of registration: 20151215 Address after: Zou County of Taoyuan city 415701 Hunan city in Changde Province town of unity Road community Osmanthus Road No. 1 Patentee after: Taoyuan Wanfu cereals and oils processing and Management Co., Ltd. Address before: Guihua Road 415701 Hunan County of Taoyuan province zoushi town Patentee before: Wanfu Biotechnology (Hunan) Agricultural Development Co., Ltd. |
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