CN104212634A - DHA (docosahexaenoic acid) oil low-temperature refining method - Google Patents
DHA (docosahexaenoic acid) oil low-temperature refining method Download PDFInfo
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- CN104212634A CN104212634A CN201410446729.1A CN201410446729A CN104212634A CN 104212634 A CN104212634 A CN 104212634A CN 201410446729 A CN201410446729 A CN 201410446729A CN 104212634 A CN104212634 A CN 104212634A
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Abstract
The invention relates to a DHA (docosahexaenoic acid) oil low-temperature refining method which comprises the following steps: slowly adding DHA oil into an alkali solution at low temperature, continuously stirring, standing, removing the lower-layer nigre, washing the oil layer with hot water, and collecting the oil layer; adding activated carbon and argil, decolorizing at low temperature, and filtering; and deodorizing at low temperature for a short time. The refined oil has the advantages of no condensation at low temperature, better flavor and small nutrient loss.
Description
Technical field
The present invention relates to a kind of low-temperature refining method of DHA grease, relative to traditional technology, adopt the low-temperature refining of whole process, tiny soap stock and easy coagulated components in oil are removed from refining workshop section, and avoids unsaturated fatty oxidation in oil.After refining, oil is noncondensing at low temperature, and local flavor is better, and nutritive loss is little, belongs to biological technical field.
Background technology
Because DHA grease is rich in unsaturated fatty acids, at high temperature can produce chemical reaction, destroy nutritive ingredient and generate objectionable impurities.And the about 75-90 degree Celsius that comes unstuck in traditional DHA grease refinery practice, alkali refining about 90 degrees Celsius, decolours about 110 degrees Celsius, deodorization 240 degrees Celsius of time 2-4 hour, the high length consuming time of refining process temperature, can have a negative impact to DHA grease nutrition and local flavor.
Because traditional refining whole process is all carry out under high-temperature condition more than 80 degrees Celsius; when refining DHA oil is after room temperature places for some time; usually there will be slight haze phenomenon; its reason is mainly because containing micro-soap stock and moisture in oil; along with temperature reduces and time lengthening; soap stock and moisture meeting segregation, make oil in muddy state, the outward appearance of impact oil and quality.
Traditional technology refining DHA oil is substantially in half curdled appearance in cryopreservation, and reason is that the composition that in grease, zero pour is higher solidifies along with low temperature, needs hot water bath that oil is melted, the outward appearance of impact oil and use cost during use.
Summary of the invention
The object of the invention is easily to occur low temperature muddiness and the phenomenon of solidifying for overcoming by the DHA grease of traditional fining process refining, at utmost retain nutritive ingredient and improve grease local flavor, a kind of omnidistance cryogenic treatment process is provided, tiny soap stock and easy coagulated components in oil are removed from refining workshop section, and avoids unsaturated fatty oxidation in oil.Make refining oil not occur solidification phenomenon at low temperature, improve grease local flavor.
For achieving the above object, method of refining of the present invention comprises: low temperature comes unstuck, low temperature alkali refining, low temperature decolour and the technological process of low temperature deodorization, concrete grammar is: by crude oil preheating 25-55 DEG C, weigh 2 ~ 3 ‰ by oil and add phosphoric acid solution and 2 ~ 3% oil soluble soybean lecithins mix, stir 20 ~ 30 minutes.Alkali refining after being cooled to 5 DEG C-10 DEG C.Concentration of sodium hydroxide solution and hydro-oxidation sodium amount is calculated by acid value and alkali-refining process requirement.Rapid stirring 30 ~ 40 minutes, when oil-soap starts separated state, opens indirect steam and oil is heated up.Slow stirring, stops after 15 ~ 20 minutes when oil temperature rises to 50-70 DEG C of stirring, standing sedimentation.By 8 ~ 15% amount of water washings that oil is heavy, standing sedimentation releases waste water in 1 ~ 2 hour, washes 3 ~ 5 times.Washing oil is squeezed into bleacher, dewaters under vacuum condition, more than vacuum tightness 0.09MPa, 65-85 DEG C is dewatered 20 ~ 30 minutes.Elaeometer is calculated, and add the sorbent material that oil weighs 5 ~ 10%, bleaching temperature 60-90 DEG C, is cooled to rapidly 75 DEG C after bleaching time 20 ~ 40min.Flame filter press filters.Squeeze into deodorizing tank, heat-conducting oil system carries out indirect heating, and open open steam when oil temperature is raised to 100 DEG C, oil temperature is raised to till 180 ~ 200 DEG C, deodorization time 30-60 minute.In tank, pass into nitrogen and use water quench deodorised oil, oil temperature drops to less than 75 DEG C, is DHA refining oil.
Specific embodiments
The present invention can be specifically described its refining process and effect by the following example.
Embodiment 1:
One, alkali refining and decolouring
1, get DHA crude oil 1T, squeeze into crude oil tank, by crude oil heating in water bath 25-55 DEG C, weigh 2 ~ 3 ‰ by oil and add phosphoric acid solution and 2 ~ 3% oil soluble soybean lecithins mix, stir 20 ~ 30 minutes.
2, use frozen water that crude oil is cooled to 10 DEG C.Hydro-oxidation sodium solution, rapid stirring 30 ~ 40 minutes, when oil-soap starts separated state, heating in water bath, slowly stirs, and stops, standing sedimentation when oil temperature rises to 55-75 DEG C of stirring after 20 minutes.
3, by the 15% amount of water washing that oil is heavy, standing sedimentation releases waste water in 2 hours, washes 5 times.
4, washing oil is put into drying chamber, dewater under vacuum condition, vacuum tightness 0.09MPa, 70-85 DEG C is dewatered 30 minutes.
5, add the sorbent material that oil weighs 10%, bleaching temperature 60-90 DEG C, is cooled to rapidly less than 75 DEG C after bleaching time 30min.
6, flame filter press filters, and is DHA decolorization refining oil.
Two, deodorization
1, get DHA decolorization refining oil 1T, squeeze into deodorizing tank, heat-conducting oil system carries out indirect heating, and open open steam when oil temperature is raised to 100 DEG C, oil temperature is raised to till 180 ~ 200 DEG C.
2, deodorization time 30-60 minute.In tank, pass into nitrogen and use water quench deodorised oil, oil temperature drops to less than 75 DEG C, is DHA refining oil.
Embodiment 2:
One, alkali refining and decolouring
1, get DHA crude oil 1T, squeeze into crude oil tank, by crude oil heating in water bath to 75-90 DEG C, weigh 2 ~ 3 ‰ by oil and add phosphoric acid solution and 2 ~ 3% oil soluble soybean lecithins mix, stir 20 ~ 30 minutes.
2, hydro-oxidation sodium solution, rapid stirring 30 ~ 40 minutes, when oil-soap starts separated state, heating in water bath, slowly stirs, and stops, standing sedimentation when oil temperature rises to 90 DEG C of stirrings after 20 minutes.
3, by the 15% amount of water washing that oil is heavy, standing sedimentation releases waste water in 2 hours, washes 5 times.
4, washing oil is put into drying chamber, dewater under vacuum condition, vacuum tightness 0.09MPa, 90 DEG C are dewatered 30 minutes.
5, add the sorbent material that oil weighs 10%, bleaching temperature 110 DEG C, bleaching time 30min, flame filter press filters, and is DHA decolorization refining oil.
Two, deodorization
1, get DHA decolorization refining oil 1T, squeeze into deodorizing tank, heat-conducting oil system carries out indirect heating, and open open steam when oil temperature is raised to 100 DEG C, oil temperature is raised to till 220 ~ 240 DEG C.
2, deodorization time 2-4 hour.In tank, pass into nitrogen and use water quench deodorised oil, oil temperature drops to less than 75 DEG C, is DHA refining oil.
Experimental data contrasts:
Micro-algae DHA grease index that low-temperature refining method is obtained
Claims (4)
1. a low-temperature refining method for DHA grease, under DHA grease 25-55 degree Celsius, washing is come unstuck.
2. slowly add alkaline solution under being cooled to 10 degrees Celsius, Keep agitation, leave standstill reject lower floor soap stock, use hot wash oil reservoir, collect oil reservoir.
3. add gac and carclazyte, decolour under 60-90 degree Celsius, filter.
4. deodorization workshop section 180-200 degree Celsius, time 30-60 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410446729.1A CN104212634A (en) | 2014-09-04 | 2014-09-04 | DHA (docosahexaenoic acid) oil low-temperature refining method |
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| CN201410446729.1A CN104212634A (en) | 2014-09-04 | 2014-09-04 | DHA (docosahexaenoic acid) oil low-temperature refining method |
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| CN104212634A true CN104212634A (en) | 2014-12-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108611188A (en) * | 2016-12-09 | 2018-10-02 | 丰益(上海)生物技术研发中心有限公司 | A kind of grease processing technique |
| CN109762655A (en) * | 2019-01-31 | 2019-05-17 | 安徽省新洲海洋生物制品有限公司 | A kind of fish oil Degumming method of high DHA content |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4981620A (en) * | 1984-07-30 | 1991-01-01 | Cpc International Inc. | In-line dewaxing of edible vegetable oils |
| CN1667105A (en) * | 2005-03-25 | 2005-09-14 | 朱少新 | Process for processing tea seed oil |
| CN101602980A (en) * | 2009-06-26 | 2009-12-16 | 青岛海隆达生物科技有限公司 | A kind of low-temperature refining method of raisin seed oil |
| CN103351947A (en) * | 2013-06-15 | 2013-10-16 | 青岛渤海科技有限公司 | Preparation method of moderately processed DHA (Docosahexaenoic acid) microalgae grease |
-
2014
- 2014-09-04 CN CN201410446729.1A patent/CN104212634A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4981620A (en) * | 1984-07-30 | 1991-01-01 | Cpc International Inc. | In-line dewaxing of edible vegetable oils |
| CN1667105A (en) * | 2005-03-25 | 2005-09-14 | 朱少新 | Process for processing tea seed oil |
| CN101602980A (en) * | 2009-06-26 | 2009-12-16 | 青岛海隆达生物科技有限公司 | A kind of low-temperature refining method of raisin seed oil |
| CN103351947A (en) * | 2013-06-15 | 2013-10-16 | 青岛渤海科技有限公司 | Preparation method of moderately processed DHA (Docosahexaenoic acid) microalgae grease |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108611188A (en) * | 2016-12-09 | 2018-10-02 | 丰益(上海)生物技术研发中心有限公司 | A kind of grease processing technique |
| CN109762655A (en) * | 2019-01-31 | 2019-05-17 | 安徽省新洲海洋生物制品有限公司 | A kind of fish oil Degumming method of high DHA content |
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