CN103710146A - Removing method of free fatty acid in fully-hydrogenated high erucic acid rapeseed oil - Google Patents
Removing method of free fatty acid in fully-hydrogenated high erucic acid rapeseed oil Download PDFInfo
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- CN103710146A CN103710146A CN201310725177.3A CN201310725177A CN103710146A CN 103710146 A CN103710146 A CN 103710146A CN 201310725177 A CN201310725177 A CN 201310725177A CN 103710146 A CN103710146 A CN 103710146A
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- rapeseed oil
- erucic acid
- high erucic
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- acid rapeseed
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Abstract
The invention discloses a removing method of free fatty acid in fully-hydrogenated high erucic acid rapeseed oil, wherein the removing method comprises the following steps: (i), adding a discoloring agent into the fully-hydrogenated high erucic acid rapeseed oil, discoloring for 20 minutes-60 minutes under a high-temperature vacuum condition; (ii), after the discoloring is completed, filtering the discoloring agent; and (iii), carrying out deodorization treatment onto grease obtained by filtering, wherein deodorization conditions are as follows: a deodorization temperature of 250 DEG C-270 DEG C, steam-stripping direct steam flow rate of 150 kg/hour-300kg/hour, and deodorization time of 2 hours-5 hours. According to the removing method disclosed by the invention, content of the free fatty acid in the fully-hydrogenated high erucic acid rapeseed oil is lowered to less than 0.03% by controlling the deodorization conditions, i.e., setting the deodorization conditions as follows: the deodorization temperature of 250 DEG C-270 DEG C, the steam-stripping direct steam flow rate of 150 kg/hour-300kg/hour, and the deodorization time of 2 hours-5 hours, so that product quality is improved.
Description
Technical field
The present invention relates to oil and fat refining field, relate in particular to a kind of removal methods of deep hydrogenation high erucic acid rapeseed oil free fatty acid.
Background technology
At present, researchist finds in the refining process of deep hydrogenation high erucic acid rapeseed oil (deep hydrogenation is defined as: by HYDROGENATION OF OILS AND FATS to iodine value < 3gI/100g), its free fatty acid content (FFA) still can not arrive and require (FFA≤0.05%), through repeatedly producing FFA all between 0.07-0.10%, under traditional product refinery practice, FFA is difficult to be reduced to inner quality standard, think that FFA is higher after high erucic acid rapeseed oil deep hydrogenation, and long carbochain C22:0 content high (> 40%) free fatty acids boiling point is high, this just cause FFA be difficult to control to≤0.05%, and the too high quality product that will affect of free fatty acid content, reduce product quality.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of removal methods of high erucic acid rapeseed oil free fatty acid, be intended to solve the problem of existing high erucic acid rapeseed oil free fatty acid too high levels.
Technical scheme of the present invention is as follows:
A removal methods for deep hydrogenation high erucic acid rapeseed oil free fatty acid, wherein, comprises step:
I) in deep hydrogenation high erucic acid rapeseed oil, add discoloring agent, and the 20 ~ 60min that decolours under high-temperature vacuum condition;
Ii), after having decoloured, discoloring agent is filtered;
Iii) grease filtration being obtained carries out deodorization processing, and deodorization condition is: 250 ~ 270 ℃ of deodorization temperatures, stripping open steam flow is 150 ~ 300kg/h, deodorization time 2 ~ 5h.
The removal methods of described deep hydrogenation high erucic acid rapeseed oil free fatty acid, wherein, discoloring agent is carclazyte.
The removal methods of described deep hydrogenation high erucic acid rapeseed oil free fatty acid, wherein, by massfraction, the addition of discoloring agent is 1 ~ 5% of deep hydrogenation high erucic acid rapeseed oil.
The removal methods of described deep hydrogenation high erucic acid rapeseed oil free fatty acid, wherein, the temperature condition in decolorization is 90 ~ 130 ℃.
Beneficial effect: the present invention is by controlling deodorization condition, being about to deodorization condition is set as: 250 ~ 270 ℃ of deodorization temperatures, stripping open steam flow is 150 ~ 300kg/h, deodorization time 2 ~ 5h, free fatty acid content in last deep hydrogenation high erucic acid rapeseed oil finished product is reduced to below 0.03%, has improved product quality.
Embodiment
The invention provides a kind of removal methods of deep hydrogenation high erucic acid rapeseed oil free fatty acid, for making object of the present invention, technical scheme and effect clearer, clear and definite, below the present invention is described in more detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The removal methods preferred embodiment of a kind of deep hydrogenation high erucic acid rapeseed oil free fatty acid provided by the present invention, it comprises step:
In deep hydrogenation high erucic acid rapeseed oil, add discoloring agent, and the 20 ~ 60min that decolours under high-temperature vacuum condition;
After having decoloured, discoloring agent is filtered, the grease that filtration is obtained is sent in deodorizing tower and is carried out deodorization, and deodorization condition is: 250 ~ 270 ℃ of deodorization temperatures, stripping open steam flow is 150 ~ 300kg/h, deodorization time 2 ~ 5h.Stripping open steam flow refers to pass into the consumption of the open steam of oil quality per-cent, with kg/h, represents.
Main improvements of the present invention are, after processing in decolouring, control deodorization condition, control the conditions such as steam flow, deodorization temperature, deodorization time, reduce the free fatty acid content in deep hydrogenation high erucic acid rapeseed oil.
Further, discoloring agent is carclazyte.Described carclazyte can be divided into natural clay and atlapulgite, and natural clay is often a kind of wilkinite, and it has certain adsorptivity under native state, and the production process of this swelling carclazyte can, from the use of opening a mine, be physical method.Atlapulgite can be also to be made by wilkinite, but this carclazyte contains a high proportion of montmorillonite, can effectively slough harmful pigment in oil, phosphatide, saponin, cotton acid etc., improves the class of edible oil.
Further, by massfraction, the addition of discoloring agent is high erucic acid rapeseed oil 1 ~ 5%.The discoloring agent of this addition, it can effectively reduce the content of deep hydrogenation high erucic acid rapeseed oil free fatty acid.
Further, the temperature condition in decolorization of the present invention is set to 90 ~ 130 ℃.Decolorizing effect under this temperature condition is best, can remove most of coloring matter.
Below by specific embodiment, method of the present invention is elaborated.
Embodiment 1
After high erucic acid rapeseed oil deep hydrogenation, in deep hydrogenation high erucic acid rapeseed oil, add 3.0%(wt% deep hydrogenation high erucic acid rapeseed oil) carclazyte, and the 40min that decolours under 100 ℃ of temperature condition and vacuum condition, complete after decolouring, discoloring agent is filtered, deep hydrogenation high erucic acid rapeseed oil after decolouring enters deodorizing tower, deodorization temperature is 260 ℃, and open steam is 190kg/h, stripping time 3h, obtain refining deep hydrogenation high erucic acid rapeseed oil, its FFA is 0.02%.
Embodiment 2
After deep hydrogenation high erucic acid rapeseed oil deep hydrogenation, in deep hydrogenation high erucic acid rapeseed oil, add 4.0%(wt% deep hydrogenation high erucic acid rapeseed oil) carclazyte, and the 40min that decolours under 130 ℃ of temperature condition and vacuum condition, complete after decolouring, discoloring agent is filtered, deep hydrogenation high erucic acid rapeseed oil after decolouring enters deodorizing tower, deodorization temperature is 250 ℃, and open steam is 150kg/h, stripping time 5h, obtain refining deep hydrogenation high erucic acid rapeseed oil, its FFA is 0.03%.
Embodiment 3
After deep hydrogenation high erucic acid rapeseed oil deep hydrogenation, in deep hydrogenation high erucic acid rapeseed oil, add 2.0%(wt% deep hydrogenation high erucic acid rapeseed oil) carclazyte, and the 40min that decolours under 110 ℃ of temperature condition and vacuum condition, complete after decolouring, discoloring agent is filtered, deep hydrogenation high erucic acid rapeseed oil after decolouring enters deodorizing tower, deodorization temperature is 263 ℃, and open steam is 220kg/h, stripping time 2h, obtain refining deep hydrogenation high erucic acid rapeseed oil, its FFA is 0.02%.
Embodiment 4
After deep hydrogenation high erucic acid rapeseed oil deep hydrogenation, in deep hydrogenation high erucic acid rapeseed oil, add 1.0%(wt% deep hydrogenation high erucic acid rapeseed oil) carclazyte, and the 40min that decolours under 90 ℃ of temperature condition and vacuum condition, complete after decolouring, discoloring agent is filtered, high deep hydrogenation erucic acid rapeseed oil after decolouring enters deodorizing tower, deodorization temperature is 254 ℃, and open steam is 300kg/h, stripping time 4h, obtain refining deep hydrogenation high erucic acid rapeseed oil, its FFA is 0.03%.
Embodiment 5
After deep hydrogenation high erucic acid rapeseed oil deep hydrogenation, in deep hydrogenation high erucic acid rapeseed oil, add 5.0%(wt% high erucic acid rapeseed oil) carclazyte, and the 40min that decolours under 100 ℃ of temperature condition and vacuum condition, complete after decolouring, discoloring agent is filtered, deep hydrogenation high erucic acid rapeseed oil after decolouring enters deodorizing tower, deodorization temperature is 265 ℃, and open steam is 250kg/h, stripping time 3h, obtain refining deep hydrogenation high erucic acid rapeseed oil, its FFA is 0.02%.
Embodiment 6
After deep hydrogenation high erucic acid rapeseed oil deep hydrogenation, in deep hydrogenation high erucic acid rapeseed oil, add 3.5%(wt% high erucic acid rapeseed oil) carclazyte, and the 40min that decolours under 130 ℃ of temperature condition and vacuum condition, complete after decolouring, discoloring agent is filtered, deep hydrogenation high erucic acid rapeseed oil after decolouring enters deodorizing tower, deodorization temperature is 270 ℃, and open steam is 200kg/h, stripping time 3h, obtain refining deep hydrogenation high erucic acid rapeseed oil, its FFA is 0.02%.
From the various embodiments described above, the deep hydrogenation high erucic acid rapeseed oil that the present invention is prepared, its FFA, all less than or equal to 0.03%, has shown by above-mentioned steps effective elimination the most of free fatty acids in deep hydrogenation high erucic acid rapeseed oil, has improved class and the added value of product.
In sum, the present invention is by controlling deodorization condition, being about to deodorization condition is set as: 250 ~ 270 ℃ of deodorization temperatures, stripping open steam flow is 150 ~ 300kg/h, deodorization time 2 ~ 5h, free fatty acid content in last deep hydrogenation high erucic acid rapeseed oil finished product is reduced to below 0.03%, has improved product quality.
Should be understood that, application of the present invention is not limited to above-mentioned giving an example, and for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (4)
1. a removal methods for deep hydrogenation high erucic acid rapeseed oil free fatty acid, is characterized in that, comprises step:
I) in deep hydrogenation high erucic acid rapeseed oil, add discoloring agent, and the 20 ~ 60min that decolours under high-temperature vacuum condition;
Ii), after having decoloured, discoloring agent is filtered;
Iii) grease filtration being obtained carries out deodorization processing, and deodorization condition is: 250 ~ 270 ℃ of deodorization temperatures, stripping open steam flow is 150 ~ 300kg/h, deodorization time 2 ~ 5h.
2. the removal methods of deep hydrogenation high erucic acid rapeseed oil free fatty acid according to claim 1, is characterized in that, discoloring agent is carclazyte.
3. the removal methods of deep hydrogenation high erucic acid rapeseed oil free fatty acid according to claim 1, is characterized in that, by massfraction, the addition of discoloring agent is 1 ~ 5% of deep hydrogenation high erucic acid rapeseed oil.
4. the removal methods of deep hydrogenation high erucic acid rapeseed oil free fatty acid according to claim 1, is characterized in that, the temperature condition in decolorization is 90 ~ 130 ℃.
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Cited By (2)
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| CN109055005A (en) * | 2018-08-28 | 2018-12-21 | 浙江康莱特药业有限公司 | A kind of pure steam deodorization method of refining of coix seed oil |
| CN115594578A (en) * | 2022-10-13 | 2023-01-13 | 禾大西普化学(四川)有限公司（Cn） | Method for purifying erucic acid by adopting steam stripping mode |
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