CN103666749A - Processing process for rapeseed oil - Google Patents
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- CN103666749A CN103666749A CN201310749977.9A CN201310749977A CN103666749A CN 103666749 A CN103666749 A CN 103666749A CN 201310749977 A CN201310749977 A CN 201310749977A CN 103666749 A CN103666749 A CN 103666749A
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Abstract
The invention discloses a processing process for rapeseed oil. The process comprises the following steps of (1) carefully selecting rapeseeds of the year, drying the rapeseeds in the sun until the water content is 9 to 11 percent, and removing impurities, wherein the oil content of the rapeseeds is 36 to 39 percent; (2) crushing the rapeseeds, and performing flasking to obtain rapeseed flakes; (3) steam-roasting the rapeseed flasks for 70 to 80 minutes by utilizing the natural water of the flasks; (4) placing the steam-roasted rapeseeds in an oil press, and pressing the rapeseeds to extract crude oil at low temperature of 60 to 70 DEG C; (5) filtering the crude oil by using a conventional method, and performing refining to obtain a rapeseed oil finished product. According to the process, the rapeseeds with the oil content of 36 to 39 percent are taken as raw materials, and are subjected to the steps of drying in the sun, steam-roasting, low-temperature pressing and the like, the obtained rapeseed oil is a non-transgenic product, the intrinsic flavor, aroma and nutrient substances of the rapeseed oil are maximally maintained, the oil yield is over 35 percent, the requirements of green processing are met, and the food safety is ensured.
Description
Technical field
The present invention relates to food processing technology field, particularly relate to a kind of complete processing of rapeseed oil.
Background technology
Rapeseed oil is commonly called as rape oil, has another name called fragrant vegetable seed oil, is with the seed oil vegetable seed of cress rape (being rape), to press the liquid of the transparent or semitransparent shape of gained.Generally be deep yellow or brown.In rapeseed oil, contain eicosanoic acid 0.4-1.0%, oleic acid 14-19%, linolic acid 12-24%, erucic acid 31-55%, linolenic acid 1-10%.From nutritive value aspect, human body can be up to 99% to rapeseed oil digestibility, and has cholagogic function.Therefore, rapeseed oil is the main dietary requirements of China consumers in general oil, and its quality is being related to the healthy of compatriots, also reflects the level of processing of China's oil prodution industry.Semen Brassicae campestris is important oil crops in the large oil crops in the world four, the main oil variety of Ye Shi China, and its chemical composition is generally nitrogen 3.9%-5.2%, protein 24.6%-32.4%, Mierocrystalline cellulose 5.7%-9.6%, ash content 4.1%-5.3%, grease 37.5%-46.3%.Semen Brassicae campestris belongs to the high oil plant that contains oil content, and the preparation method of producing at present rapeseed oil mainly contains the method for directly squeezing after fire is fried, and high temperature pre-pressing extraction technology etc.The technical defect of these method ubiquities and deficiency.
Small workshop mode giving off a strong fragrance rapeseed oil among the people is that after adopting fire to fry, oil is got in direct squeezing, poor without the oil quality of refinery practice, the more difficult related request that meets of sanitary index.Traditional high temperature pre-pressing extraction technology, not only cost is high, oil yield is low, and oil product is without strong fragrance, and solvent extraction security is not high, and environmental pollution is large.Because impurity-removing method is improper, reason as more high in heating under vacuum temperature, in the process of removal of impurities, part nutritive ingredient in grease also can be removed, cause nutritive loss, improved production cost, also reduced the security of rapeseed oil, also may cause the fragrance of rapeseed oil strong not, cannot meet the needs in market.The material choice of rapeseed oil of the prior art is unreasonable, and through roller frying and high temperature squeezing, has not only improved cost, also can cause disadvantageous effect to the quality of rapeseed oil and local flavor.
As the production technique of the disclosed a kind of rapeseed oil of CN103396884A, be that Semen Brassicae campestris is cleaned up, dry to water content 5-8%; Semen Brassicae campestris after drying is fried out after perfume (or spice), pulverize; Semen Brassicae campestris after pulverizing is sent into oil press zhai squeezing and get oil, obtain just squeezing rapeseed oil.The deficiency of this scheme is, adopts furnace drying method may affect the quality of Semen Brassicae campestris, and the water content after oven dry is lower, may affect oil yield.
Summary of the invention
The object of the present invention is to provide a kind of complete processing of rapeseed oil, solved that the cost that in prior art, giving off a strong fragrance rapeseed oil preparation technique exists is high, security not high, dense insufficient fragrance, be subject to environmental pollution and the problems such as inferior quality.
The invention provides following technical scheme:
A complete processing for rapeseed oil, the Semen Brassicae campestris that the oleaginousness of take is 36%～39% is raw material, through drying, removal of impurities, pressure embryo, steam stir-fry, low temperature pressing, refining process, comprises the following steps:
(1) the selected vegetable seed of produce oil then, the oleaginousness of described Semen Brassicae campestris is 36%～39%, by Semen Brassicae campestris dry to water content be 9%～11%, remove impurity;
(2) broken Semen Brassicae campestris, rolls embryo, obtains Semen Brassicae campestris material embryo;
(3) steam fried season vegetable seed material embryo, utilize the Natural Water of material embryo to divide and steam stir-fry, the time is 70～80min;
(4) Semen Brassicae campestris of steaming having been fried is put into oil press zhai low temperature and is squeezed rapeseed oil, obtains crude oil, and pressing temperature is 60～70 ℃;
(5) filtered crude oil according to a conventional method, obtains finished product rapeseed oil by refining.
In the Semen Brassicae campestris of described step (1), also can add fresh cavings or tea-seed, carry out batch mixing squeezing, additional proportion is in every 100kg Semen Brassicae campestris, to mix the fresh cavings of 5kg～7kg or tea-seed.
Low temperature pressing in described step (4) is to adopt low-temp. screw oil expeller to carry out low temperature pressing.
The moisture that enters to squeeze of the low temperature pressing in described step (4) is 6%～8%, and in the grouts after squeezing, residual oil content is 12%～15%.
Refining in described step (5) comprises aquation, alkali refining, decolouring and deodorization procedures; Aquation operation is the wetting ability phosphatide of removing or reclaiming in Crude Dapeseed Oil, i.e. dephosphorization; Alkali refining operation is that caustic soda soln is added in crude oil, then uses whizzer continuous separate from purifying crude oil; Bleaching process is that rapeseed oil pigment content is reduced to desired level, is mainly quantitative carclazyte is mixed with the oil of heating in the situation that being connected with nitrogen, in bleacher, decolours; Deodorization procedures is the superoxide destroying in oil, removes the more volatile stink substance that aldehyde, ketone or other atmospheric oxidations produce, and by destroying unsettled carotene, oil colours is shoaled.
Technical solution of the present invention according to as follows:
It is 36%～39% Semen Brassicae campestris that the present invention adopts oleaginousness, from raw material, has guaranteed material idioplasm amount, can improve leaching effect, guarantees the low temperature pressing effect of high quality rapeseed oil.According to State Standard of the People's Republic of China GB11762-89 Semen Brassicae campestris quality index: the moisture of Semen Brassicae campestris is not higher than 8.0%; Impurity is no more than 3.0%; Moldy kernel limit is for being no more than 2%; According to oleaginousness graduation, one-level oleaginousness is 40%, and secondary oleaginousness is that 39%, three grade of oleaginousness is 38%, and level Four oleaginousness is 37%, and Pyatyi oleaginousness is that 36%, six grade of oleaginousness is that 35%, seven grade of oleaginousness is that 34%, eight grade of oleaginousness is 33%.The Semen Brassicae campestris that the present invention adopts is the Semen Brassicae campestris that secondary arrives Pyatyi, is more suitable for steaming frying and low temperature pressing, and the rapeseed oil grease local flavor making is constant, the basic free of losses of nutritive ingredient; And the rapeseed oil quality that the Semen Brassicae campestris of drying is squeezed out is better than the Semen Brassicae campestris of drying, this point is not apparent, is applicant's summary of knowhow for many years.
Rape seed is little, and skin is thin, large with air contact area, is easy to absorb moisture.The present invention by Semen Brassicae campestris dry to water content be 9%～11%, be conducive to broken and roll embryo, because moisture easily goes mouldy in more than 12% Semen Brassicae campestris, although and moisture easily stores and squeezes poor effect in the Semen Brassicae campestris below 9%.Removing impurity, as earth, cauline leaf, sandstone, metal etc., is because these impurity not only can affect the quality of grease and grouts, also can adsorb a part of grease, reduces oil yield; Even can cause component wear, bring out industrial accident, affect technological effect.Roll embryo and be conducive to the cyto-architectural destruction of oil plant, be easy to take out the oil in cell.
Steam frying operation is one of most important operation in squeeze in advance-extract technology of whole rapeseed oil, steams the quality of frying operation effect, and the quality of carrying out smoothly of whole liquefaction process and the height of oil yield and oil product, grouts is had to direct impact.Steaming stir-fry operation is difficult for holding owing to being subject to the impact of many factors vary.Controlling moisture and steaming the temperature and time of frying is to obtain the best key of frying effect of steaming.Excessive for fear of steaming stir-fry, the present invention adopts the steaming of 70～80min to fry the time, is shorter than steaming of the prior art and fries the time, but be conducive to steaming stir-fry degree and the quality that embryo is expected in control.Semen Brassicae campestris after fragmentation is carried out above-mentioned steaming and is fried processing, can improve squeezing effect.The present invention utilizes the Natural Water of material embryo to divide and steams stir-frys, has reduced and has steamed the operation easier of frying, and can stablize control and expect idioplasm amount, and the crude oil color and luster and the foreign matter content that obtain also improve significantly.
Low temperature pressing oil is that a kind of to have the intrinsic smell of rapeseed oil, flavour, mouthfeel pure, and the intact new oil product of natural nutrient component.The low temperature pressed cake of gained is also remaining a grease of 12%～15%, in order to improve to greatest extent oil yield, makes residual oil content in leaching meal be reduced to 1% left and right.
Because vegetable seed oil length is high, in squeezing cylinder, after pressurization, slide fast, oil is not also all squeezed out, and rapeseed cake has just gone out crusher, and add cavings or tea-seed, can make the vegetable seed sliding velocity that slows down, therefore can extract oil, improves oil yield and squeezing efficiency more.In every 100kg Semen Brassicae campestris, mix the fresh cavings of 5kg～7kg or tea-seed, can improve squeezing efficiency.The nutritive substance that contains a large amount of preciousnesses in tea-seed, includes the nutritive ingredient of the needed by human body such as abundant tea-polyphenol, VE, linolic acid, and the tea seed oil making with tea-seed is a kind of nutritious edible oil, has healthy opsonization.Therefore mix the rapeseed oil that obtains of squeezing with Semen Brassicae campestris with tea-seed, not only oil yield is high, and quality is better, and nutritive ingredient is abundant, also has certain health-care effect.Utilizing tea-seed mixing squeezing rapeseed oil, can also turn waste into wealth, effectively utilize tea-seed resource, is doulbe-sides' victory.
Beneficial effect of the present invention: adopting the Semen Brassicae campestris that oleaginousness is 36～39% is raw material, through drying, steam the steps such as stir-fry, low temperature pressing, the rapeseed oil of making is non-transgenic product, maximum journey has retained the intrinsic local flavor of rapeseed oil, fragrance and nutritive substance, and oil yield is higher than 35%, meet green processing requirement, ensured food safety.The rapeseed oil color and luster that adopts the inventive method to make is more shallow, has the intrinsic smell of rapeseed oil, and in oil, phospholipids content is low, is only 62mg/kg left and right, is natural non-polluted edible oil.The grouts that produce in production process of the present invention have the advantages that crude fiber content is low, protein content is high, can be used as high-quality feed.
Specific embodiment mode
In order to deepen the understanding of the present invention, below in conjunction with specific embodiment, the present invention is described in further detail, but do not form limiting the scope of the present invention.
Embodiment 1
(1) the selected vegetable seed of produce oil then, the oleaginousness of described Semen Brassicae campestris is 36%, by Semen Brassicae campestris dry to water content be 9%, remove impurity;
(2) broken Semen Brassicae campestris, rolls embryo, obtains Semen Brassicae campestris material embryo;
(3) steam fried season vegetable seed material embryo, utilize the Natural Water of material embryo to divide and steam stir-fry, the time is 70min;
(4) Semen Brassicae campestris of steaming having been fried is put into oil press zhai low temperature and is squeezed rapeseed oil, obtains crude oil, and pressing temperature is 60 ℃;
(5) filtered crude oil according to a conventional method, obtains finished product rapeseed oil by refining.
Embodiment 2
(1) the selected vegetable seed of produce oil then, the oleaginousness of described Semen Brassicae campestris is 37%, by Semen Brassicae campestris dry to water content be 10%, remove impurity;
In the Semen Brassicae campestris of described step (1), also can add fresh cavings or tea-seed, carry out batch mixing squeezing, in every 100kg Semen Brassicae campestris, mix the fresh cavings of 5kg or tea-seed;
(2) broken Semen Brassicae campestris, rolls embryo, obtains Semen Brassicae campestris material embryo;
(3) steam fried season vegetable seed material embryo, utilize the Natural Water of material embryo to divide and steam stir-fry, the time is 75min;
(4) Semen Brassicae campestris of steaming having been fried is put into oil press zhai low temperature and is squeezed rapeseed oil, obtains crude oil, and pressing temperature is 65 ℃;
(5) filtered crude oil according to a conventional method, obtains finished product rapeseed oil by refining.
Embodiment 3
(1) the selected vegetable seed of produce oil then, the oleaginousness of described Semen Brassicae campestris is 38%, by Semen Brassicae campestris dry to water content be 11%, remove impurity;
In the Semen Brassicae campestris of described step (1), also can add fresh cavings or tea-seed, carry out batch mixing squeezing, in every 100kg Semen Brassicae campestris, mix the fresh cavings of 6kg or tea-seed;
(2) broken Semen Brassicae campestris, rolls embryo, obtains Semen Brassicae campestris material embryo;
(3) steam fried season vegetable seed material embryo, utilize the Natural Water of material embryo to divide and steam stir-fry, the time is 80min;
(4) Semen Brassicae campestris of steaming having been fried is put into oil press zhai low temperature and is squeezed rapeseed oil, obtains crude oil, and pressing temperature is 70 ℃;
Low temperature pressing in described step (4) is to adopt low-temp. screw oil expeller to carry out low temperature pressing;
(5) filtered crude oil according to a conventional method, obtains finished product rapeseed oil by refining.
Embodiment 4
(1) the selected vegetable seed of produce oil then, the oleaginousness of described Semen Brassicae campestris is 39%, by Semen Brassicae campestris dry to water content be 9.5%, remove impurity; In the Semen Brassicae campestris of described step (1), also can add fresh cavings or tea-seed, carry out batch mixing squeezing, additional proportion is in every 100kg Semen Brassicae campestris, to mix the fresh cavings of 7kg or tea-seed;
(2) broken Semen Brassicae campestris, rolls embryo, obtains Semen Brassicae campestris material embryo;
(3) steam fried season vegetable seed material embryo, utilize the Natural Water of material embryo to divide and steam stir-fry, the time is 72.5min;
(4) Semen Brassicae campestris of steaming having been fried is put into oil press zhai low temperature and is squeezed rapeseed oil, obtains crude oil, and pressing temperature is 62.5 ℃; Low temperature pressing in described step (4) is to adopt low-temp. screw oil expeller to carry out low temperature pressing; The moisture that enters to squeeze of low temperature pressing is 6%, and in the grouts after squeezing, residual oil content is 12%;
(5) filtered crude oil according to a conventional method, obtains finished product rapeseed oil by refining.
Embodiment 5
(1) the selected vegetable seed of produce oil then, the oleaginousness of described Semen Brassicae campestris is 38%, by Semen Brassicae campestris dry to water content be 10.5%, remove impurity; In the Semen Brassicae campestris of described step (1), also can add fresh cavings or tea-seed, carry out batch mixing squeezing, additional proportion is in every 100kg Semen Brassicae campestris, to mix the fresh cavings of 6kg or tea-seed;
(2) broken Semen Brassicae campestris, rolls embryo, obtains Semen Brassicae campestris material embryo;
(3) steam fried season vegetable seed material embryo, utilize the Natural Water of material embryo to divide and steam stir-fry, the time is 77.5min;
(4) Semen Brassicae campestris of steaming having been fried is put into oil press zhai low temperature and is squeezed rapeseed oil, obtains crude oil, and pressing temperature is 67.5 ℃; Low temperature pressing in described step (4) is to adopt low-temp. screw oil expeller to carry out low temperature pressing; The moisture that enters to squeeze of low temperature pressing is 8%, and in the grouts after squeezing, residual oil content is 15%;
(5) filtered crude oil according to a conventional method, obtains finished product rapeseed oil by refining;
Refining in described step (5) comprises aquation, alkali refining, decolouring and deodorization procedures;
Aquation operation is the wetting ability phosphatide of removing or reclaiming in Crude Dapeseed Oil, i.e. dephosphorization; Adding weight is that the water of crude oil weight 25% carries out aquation, first with 75r/min, stir 30min, then with 65r/min low rate mixing 10min, after aquation, filtering separation, obtains aquation crude oil;
Alkali refining operation is that caustic soda soln is added in crude oil, then uses whizzer continuous separate from purifying crude oil;
Bleaching process is that rapeseed oil pigment content is reduced to desired level, is mainly quantitative carclazyte is mixed with the oil of heating in the situation that being connected with nitrogen, in bleacher, decolours; Deodorization procedures is the superoxide destroying in oil, removes the more volatile stink substance that aldehyde, ketone or other atmospheric oxidations produce, and by destroying unsettled carotene, oil colours is shoaled.The discoloring agent that decolouring is used is gac, and consumption is oil mass 2%～4%.
After testing, the rapeseed oil quality that adopts the inventive method processing to obtain meets the relevant regulations of GB1536-2004.
Claims (5)
1. a complete processing for rapeseed oil, is characterized in that: the Semen Brassicae campestris that the oleaginousness of take is 36%～39% is raw material, through drying, removal of impurities, pressure embryo, steam stir-fry, low temperature pressing, refining process, comprises the following steps:
(1) the selected vegetable seed of produce oil then, the oleaginousness of described Semen Brassicae campestris is 36%～39%, by Semen Brassicae campestris dry to water content be 9%～11%, remove impurity;
(2) broken Semen Brassicae campestris, rolls embryo, obtains Semen Brassicae campestris material embryo;
(3) steam fried season vegetable seed material embryo, utilize the Natural Water of material embryo to divide and steam stir-fry, the time is 70～80min;
(4) Semen Brassicae campestris of steaming having been fried is put into oil press zhai low temperature and is squeezed rapeseed oil, obtains crude oil, and pressing temperature is 60～70 ℃;
(5) filtered crude oil according to a conventional method, obtains finished product rapeseed oil by refining.
2. the working method of the complete processing of rapeseed oil as claimed in claim 1, it is characterized in that: in the Semen Brassicae campestris of described step (1), also can add fresh cavings or tea-seed, carry out batch mixing squeezing, additional proportion is in every 100kg Semen Brassicae campestris, to mix the fresh cavings of 5kg～7kg or tea-seed.
3. the working method of the complete processing of rapeseed oil as claimed in claim 1, is characterized in that: the low temperature pressing in described step (4) is to adopt low-temp. screw oil expeller to carry out low temperature pressing.
4. the working method of the complete processing of rapeseed oil as claimed in claim 1, is characterized in that: the moisture that enters to squeeze of the low temperature pressing in described step (4) is 6%～8%, and in the grouts after squeezing, residual oil content is 12%～15%.
5. the working method of the complete processing of rapeseed oil as claimed in claim 1, is characterized in that: the refining in described step (5) comprises aquation, alkali refining, decolouring and deodorization procedures; Aquation operation is the wetting ability phosphatide of removing or reclaiming in Crude Dapeseed Oil, i.e. dephosphorization; Alkali refining operation is that caustic soda soln is added in crude oil, then uses whizzer continuous separate from purifying crude oil; Bleaching process is that rapeseed oil pigment content is reduced to desired level, is mainly quantitative carclazyte is mixed with the oil of heating in the situation that being connected with nitrogen, in bleacher, decolours; Deodorization procedures is the superoxide destroying in oil, removes the more volatile stink substance that aldehyde, ketone or other atmospheric oxidations produce, and by destroying unsettled carotene, oil colours is shoaled.
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