CN103804513A - Method for extracting pectins from waste citrus peels - Google Patents
Method for extracting pectins from waste citrus peels Download PDFInfo
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- CN103804513A CN103804513A CN201210453193.7A CN201210453193A CN103804513A CN 103804513 A CN103804513 A CN 103804513A CN 201210453193 A CN201210453193 A CN 201210453193A CN 103804513 A CN103804513 A CN 103804513A
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Abstract
The invention belongs to extraction processes of agricultural products and relates to a recycling process of citrus peels and in particular relates to a method for extracting pectins from waste citrus peels. The method specifically comprises the following steps: cutting the waste citrus peels into grains and boiling the grains with water at 80-90 DEG C for 1-10 minutes to obtain pretreatment raw materials; treating the pretreated raw material in an aqueous medium with pH value of 1-3 for not less than 1 hour and collecting the liquid; adding an ethanol solution to the liquid and collecting the precipitates which are pectins after the precipitation reaction is fully completed. The method for extracting the pectins has the beneficial effects that the yield of the pectins is more than 15%; the extracted pectins have good fineness and are low in cost; the remainders after extraction can be used for extracting celluloses and the like; and the residual solvent can be also recycled.
Description
Technical field
The invention belongs to the extraction process of agricultural-food, be specifically related to the recycling technique of peel of Citrus reticulata Blanco.
Background technology
Chongqing region citrus industry is very flourishing, citrus as a kind of economic plants by establishing in large scale.Make a general survey of the whole nation, annual citrus production reaches 1,500 ten thousand tons.Citrus is as the main raw material of can, fruit juice etc., but remaining orange peel is except preparing Chinese medicine, is not fully utilized.
Pectin is a kind of acidic polysaccharose material in plant, and it is generally white to pale yellow powder, is slightly with tart flavour, have water-soluble, industrial separable, its molecular weight approximately 50,000 one 30 ten thousand, mainly being present in cell walls and the cell internal layer of plant, is the support substance of inner cell.On food, make jelling agent, thickening material, stablizer, suspension agent, emulsifying agent, flavouring synergistic agent, and can be used for makeup, and to protection skin, preventing ultraviolet radiation, wound is treated in smelting, and beautifying face and moistering lotion is all deposited certain effect.
In orange peel, contain a large amount of pectin, still, the technique of extracting pectin from peel of Citrus reticulata Blanco is stable not, and yield is low.
Summary of the invention
The object of the present invention is to provide a kind of recycling method of discarded peel of Citrus reticulata Blanco, the method is worth for a large amount of discarded peel of Citrus reticulata Blanco provides regeneration.
For achieving the above object, technical scheme of the present invention is:
The method of extracting pectin from discarded peel of Citrus reticulata Blanco, is characterized in that, specifically comprises the following steps:
A pre-treatment
To discard peel of Citrus reticulata Blanco and be cut into particle, boil 1-10 minute at 80-90 ℃ of Water Under, obtain pretreating raw material;
B acid treatment
In the water medium that is 1-3 in pH value by described pretreating raw material, process and be no less than 1 hour, collect liquid;
C precipitation
In described liquid, add ethanolic soln, after precipitin reaction fully completes, collecting precipitation, described in be precipitated as pectin.
Further, the particle diameter of particle described in steps A is not more than 100 orders.
Further, in steps A, described temperature is 90 ℃, and the described poach time is 6 minutes.
Further, in step B, described pH value is 1.8, and the described treatment time is 2 hours, and the temperature of described water medium is 70 ℃.
Further, in step C, the volume final concentration of described ethanol is 70%.
Further, in step C, the method for described collecting precipitation is centrifugal.
Further, described centrifugal condition centrifugally under 3000 revs/min of conditions is no less than 10 minutes for being not less than.
Further, the pretreating raw material of steps A gained is decoloured processing.
Further, the step of described decolouring processing is: with the gac processing of decolouring, the mass ratio of described gac and described discarded peel of Citrus reticulata Blanco is 1:100-300.
Further, by the abundant washes clean of ethanol for pretreating raw material described in steps A.
Beneficial effect of the present invention is: utilize this technique to extract pectin, its yield reaches more than 15%.The pectin extracting is of good quality, and cost is low; Residuum after extraction can also be used for extracting Mierocrystalline cellulose etc.; Remaining solvent also can recycle.
Embodiment
embodiment 1
The method of extracting pectin from discarded peel of Citrus reticulata Blanco, specifically comprises the following steps:
1) will discard peel of Citrus reticulata Blanco and be cut into particle, the particle diameter of particle is 50 orders.
2) boil 7 minutes at 90 ℃ of Water Unders, and the processing of decolouring: with the gac processing of decolouring, the mass ratio of described gac and described discarded peel of Citrus reticulata Blanco is 1:100.
3) decolouring is used washing with alcohol 5 times after processing, and obtains pretreating raw material.
4) in the hydrochloric acid soln that is 2 by described pretreating raw material in pH value, process 120 minutes, the temperature of hydrochloric acid soln is 70 degrees Celsius, collects liquid;
5) in described liquid, add ethanolic soln, the final concentration that makes ethanol is 60%, react 3 hours, collecting precipitation, the mode of collecting precipitation is that centrifugal, described centrifugal condition is under 3000 revs/min of conditions centrifugal 10 minutes, described in be precipitated as pectin.
After testing, the content of pectin is 15.5%.
Embodiment 2
The method of extracting pectin from discarded peel of Citrus reticulata Blanco, specifically comprises the following steps:
1) will discard peel of Citrus reticulata Blanco and be cut into particle, the particle diameter of particle is 80 orders.
2) boil 6 minutes at 80 ℃ of Water Unders, and the processing of decolouring: with the gac processing of decolouring, the mass ratio of described gac and described discarded peel of Citrus reticulata Blanco is 1:300.
3) decolouring is used washing with alcohol 5 times after processing, and obtains pretreating raw material.
4) in the sulphuric acid soln that is 1.8 by described pretreating raw material in pH value, process 70 minutes, the temperature of hydrochloric acid soln is 75 degrees Celsius, collects liquid;
5) in described liquid, add ethanolic soln, the final concentration that makes ethanol is 75%, react 3.5 hours, collecting precipitation, the mode of collecting precipitation is that centrifugal, described centrifugal condition is under 5000 revs/min of conditions centrifugal 10 minutes, described in be precipitated as pectin.
After testing, the content of pectin is 17%.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although by with reference to the preferred embodiments of the present invention, invention has been described, but those of ordinary skill in the art is to be understood that, can make various changes to it in the form and details, and not depart from the spirit and scope of the present invention that appended claims limits.
Claims (10)
1. the method for extracting pectin from discarded peel of Citrus reticulata Blanco, is characterized in that, specifically comprises the following steps:
A pre-treatment
To discard peel of Citrus reticulata Blanco and be cut into particle, boil 1-10 minute at 80-90 ℃ of Water Under, obtain pretreating raw material;
B acid treatment
In the water medium that is 1-3 in pH value by described pretreating raw material, process and be no less than 1 hour, collect liquid;
C precipitation
In described liquid, add ethanolic soln, after precipitin reaction fully completes, collecting precipitation, described in be precipitated as pectin.
2. method according to claim 1, is characterized in that: the particle diameter of particle described in steps A is not more than 100 orders.
3. method according to claim 1, is characterized in that: in steps A, described temperature is 90 ℃, and the described poach time is 6 minutes.
4. method according to claim 1, is characterized in that: in step B, described pH value is 1.8, and the described treatment time is 2 hours, and the temperature of described water medium is 70 ℃.
5. method according to claim 1, is characterized in that: in step C, the volume final concentration of described ethanol is 70%.
6. method according to claim 1, is characterized in that: in step C, the method for described collecting precipitation is centrifugal.
7. method according to claim 6, is characterized in that: described centrifugal condition centrifugally under 3000 revs/min of conditions is no less than 10 minutes for being not less than.
8. method according to claim 1, is characterized in that: by the processing of decolouring of the pretreating raw material of steps A gained.
9. method according to claim 8, is characterized in that: the step of described decolouring processing is: with the gac processing of decolouring, the mass ratio of described gac and described discarded peel of Citrus reticulata Blanco is 1:100-300.
10. method according to claim 1, is characterized in that: by the abundant washes clean of the ethanol of pretreating raw material described in steps A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210453193.7A CN103804513A (en) | 2012-11-13 | 2012-11-13 | Method for extracting pectins from waste citrus peels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210453193.7A CN103804513A (en) | 2012-11-13 | 2012-11-13 | Method for extracting pectins from waste citrus peels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103804513A true CN103804513A (en) | 2014-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210453193.7A Pending CN103804513A (en) | 2012-11-13 | 2012-11-13 | Method for extracting pectins from waste citrus peels |
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| CN (1) | CN103804513A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107652372A (en) * | 2017-10-26 | 2018-02-02 | 华中农业大学 | A kind of orange peel pectin without alcohol extracting method |
| CN109306026A (en) * | 2018-07-24 | 2019-02-05 | 华南理工大学 | The fractional extraction method of citrus pectin and application |
-
2012
- 2012-11-13 CN CN201210453193.7A patent/CN103804513A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107652372A (en) * | 2017-10-26 | 2018-02-02 | 华中农业大学 | A kind of orange peel pectin without alcohol extracting method |
| CN109306026A (en) * | 2018-07-24 | 2019-02-05 | 华南理工大学 | The fractional extraction method of citrus pectin and application |
| CN109306026B (en) * | 2018-07-24 | 2021-04-09 | 江西莱檬生物科技有限责任公司 | Method for extracting pectin from citrus by classification and application thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140521 |