CN102050844B - Method for extracting tannin by using eucalyptus barks - Google Patents
Method for extracting tannin by using eucalyptus barks Download PDFInfo
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- CN102050844B CN102050844B CN2010105402262A CN201010540226A CN102050844B CN 102050844 B CN102050844 B CN 102050844B CN 2010105402262 A CN2010105402262 A CN 2010105402262A CN 201010540226 A CN201010540226 A CN 201010540226A CN 102050844 B CN102050844 B CN 102050844B
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- tannin
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- mallee bark
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Abstract
The invention relates to a method for extracting tannin by using eucalyptus barks, comprising the following steps of: (1) grinding the eucalyptus barks by using a grinder; (2) immersing in hot water, placing the grinded eucalyptus barks in a tank, adding water according to the solid-liquid mass ratio of 1:(2-7), and heating to the temperature of 60-100 DEG C for 2-24h; (3) extracting a tannin extracting solution from the immersed eucalyptus barks with the hot water at 60-100 DEG C; and (4) concentrating and drying the tannin extracting solution to obtain liquid tanning extract or solid tanning extract. In the invention, tannin is extracted from the eucalyptus barks with an effective method, and the extracted tannin has a high out-going degree and a higher economic value. By recycling the eucalyptus barks which are waste material originally, the invention not only solves the problem that the eucalyptus barks are difficult to process but also creates great economic benefits, thereby achieving two purposes with one method.
Description
Technical field
The present invention relates to tannin and extract, especially in bark, extract the method for tannin.
Background technology
Eucalyptus is the general name that the Myrtaceae eucalyptus belongs to seeds, and eucalyptus belongs to the Myrtaceae eucalyptus and belongs to, and originates in Australia, provinces and regions such as China mainly plants in Yunnan, Guangdong, Guangxi and Chuan Xi.Varieties of plant has blue gum, straight dried blue gum, lemon-scented gum tree, Folium Eucalypti Robustae and sees 5 kinds of blade profile copper coin eucalyptus, and folium eucalypti can extract volatile oil extracted from eucalyptus' leaves or twigs (perfume oil), and leaf and essential oil can be used as medicine, and anti-inflammation and sterilization is arranged, is good for the stomach, eliminates the phlegm, the effect of wind dispelling.
The eucalyptus characteristics:
1. growth is fast.Eucalyptus is the seeds that look the fastest in the world, the growth busy season, can grow tall 3 centimetres in 1 day, and can grow tall 1 meter in one month, 1 year the highest grows 10 meters.Brazil has the best eucalyptus plantation of growing in the world, and the highest speed of growth reaches 7.8 cubic metres/year. mu, and China is in the pilot forest in Hainan, and the highest speed of growth reaches 4 cubic metres/year. mu.
2. felling cycle is extremely short.Be 70 years the felling cycle of Northern Europe dragon spruce artificial forest; Be 20-25 the felling cycle of China's Masson Pine Plantation, and China fir felling cycle is 15-20, and be 5-7 the felling cycle of southern each province eucalyptus plantation; Especially Lezhou Peninsula, have in addition foreshorten to 3-4.Because growth is exceedingly fast, the timber of production is mainly used in and breaks into wood chip, and as papermaking or fibre board industry raw material, therefore, the management mode of SP small dimension wood is popular.
3. technology maturation.Eucalyptus flexibility is strong, is suitable for intensive farming and high-yield culturing, and the world gives widely plantation of ground at present, and the sophisticated cultivation of a cover, ME are arranged, as long as kind is proper, measure puts in place, obtains high yield surely with regard to one.
4. disease and pest is few.Because eucalyptus is exotic tree species, at present not long in the history of Chinese establishing in large scale, therefore, also seldom there is large-area disease and pest to take place, well more a lot of than the situation of willow.But in recent years, the situation of disease and pest has the expansion Development Trend.
5. good in economic efficiency.The economic benefit of eucalyptus plantation is the outstanding person in present China forestry industry.
Eucalyptus belongs to intolerant tree species, and red, glossy, the no special odor of timber, texture interlock, structure is close, material is heavy firmly, flexible, extremely is fit to do the material of using of bending-wood.Can make furniture, floor, turner, tool holder and farm implements etc.Its fiber is good paper making raw material, and the small dimension wood fuel value is high, can make fuel, and purposes is very extensive.
Eucalyptus perhaps is utilized as papermaking as timber, all is need mallee bark be removed, in today that eucalyptus extensively is employed; Can produce a large amount of mallee bark; These mallee bark are considered to waste material usually, need to solve through waste disposal, do not have condition to solve; Can only stack, so waste many land resources.
According to researching and analysing, contain abundant tannin in the mallee bark, a large amount of mallee bark can not get reasonable utilization, can cause huge economic waste undoubtedly.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method of utilizing mallee bark to extract tannin, from extracting tannin the mallee bark as waste material originally, to the resources effective utilization, produces huge economic benefit; Technology of the present invention is simple, and product is stable, practical.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of method of utilizing mallee bark to extract tannin may further comprise the steps:
1) with crusher mallee bark is pulverized;
2) hot-water soak is put into the groove jar with the mallee bark of fragmentation, and be 1 by the solid-liquid mass ratio: (2 ~ 7) add water, Heating temperature to 60 ℃ ~ 100 ℃, and be 2 h ~ 24 hours heat-up time;
3) bark after will soaking is with 60 ℃ ~ 100 ℃ hot-water extraction tannin extracting solutions;
4) tannin extracting solution concentrate drying obtains fluid extract or solid tannin extract.
As optimal way, mallee bark is ground into thread.
Particularly optimal way, mallee bark is ground into sheet.
As optimal way, said extracting groove jar is that single groove is extruded wash-out.
As optimal way, said extracting groove jar is the multiple tank recycling elution.
As optimal way, add Sodium Pyrosulfite in the extracting solution and carry out activation, concentrate drying obtains fluid extract or solid tannin extract.
The beneficial effect that the present invention is compared with prior art brought is:
1, new source exploitation: utilize forest products industry waste mallee bark, make a silk purse out of a sow's ear, invention novel process, exploitation new resources;
2, environmental friendliness: consume environmental pollutant, reduce environmental stress;
3, agricultural increase income: forestry waste becomes sub product sells, and increases forest worker, farmers' income;
4, advanced technology: technology of the present invention is simple, product stable, practical;
5, remarkable in economical benefits: the product super quality and competitive price, production cost is lower more than 50% than traditional method, remarkable benefit.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Below in conjunction with Figure of description the present invention is described further.
Embodiment 1
As shown in Figure 1, present embodiment is that example is analyzed with the Folium Eucalypti Robustae bark, and the step of the Folium Eucalypti Robustae bark being carried out the tannin extraction is following:
1) after first mallee bark is removed impurity and drying, with crusher mallee bark is broken into threadly, size is about 25mm ~ 50mm, is best with 25mm in the present embodiment;
2) hot-water soak is put into the groove jar with the mallee bark of fragmentation, and the groove jar of present embodiment is the metal tin of 20m3, is that 1:2 adds water by the solid-liquid mass ratio, Heating temperature to 60 ℃, and be 2 hours heat-up time;
3) the bark particle after will soaking is put into Φ 200L3.5m screw extrusion press top uncoupling type and is extruded, and extrudes type of elution extracting tannin extracting solution with 60 ℃ of hot water with single groove;
4) add Sodium Pyrosulfite in the extracting solution and carry out activation, concentrating the liquid concentrator degree Beaume that obtains is 14 ° of B é, obtains the solid tannin extract through spraying drying.
The tannin extract tannin content is analyzed:
| Seeds | Tannin % | Non-tannis % | Not tolerant % | Total extractum % | PH value |
| Folium Eucalypti Robustae | 75.3 | 19.7 | 1.3 | 96.3 | 4.8 |
Embodiment 2
As shown in Figure 1, present embodiment is that example is analyzed with the Eucalyptus urophylla bark, and the step of the Eucalyptus urophylla bark being carried out the tannin extraction is following:
1) after first mallee bark is removed impurity and drying, with crusher mallee bark is broken into threadly, size is about 25mm ~ 50mm, is best with 30mm in the present embodiment;
2) hot-water soak is put into the groove jar with the mallee bark of fragmentation, and the groove jar of present embodiment is the metal tin of 20m3, is that 1:3 adds water by the solid-liquid mass ratio, Heating temperature to 70 ℃, and be 7 hours heat-up time;
3) the bark particle after will soaking is put into Φ 200L3.5m screw extrusion press top uncoupling type and is extruded, and extrudes type of elution extracting tannin extracting solution with 70 ℃ of hot water with single groove;
4) add Sodium Pyrosulfite in the extracting solution and carry out activation, concentrating the liquid concentrator degree Beaume that obtains is 15 ° of B é, obtains the solid tannin extract through spraying drying.
The tannin extract tannin content is analyzed:
| Seeds | Tannin % | Non-tannis % | Not tolerant % | Total extractum % | PH value |
| Eucalyptus urophylla | 73.7 | 22.1 | 1.5 | 97.3 | 4.68 |
Embodiment 3
As shown in Figure 1, present embodiment is that example is analyzed with the blue gum bark, and the step of the blue gum bark being carried out the tannin extraction is following:
1) after first mallee bark is removed impurity and drying, with crusher mallee bark is broken into threadly, size is about 25mm ~ 50mm, is best with 35mm in the present embodiment;
2) hot-water soak is put into the groove jar with the mallee bark of fragmentation, and the groove jar of present embodiment is the metal tin of 20m3, is that 1:4 adds water by the solid-liquid mass ratio, Heating temperature to 80 ℃, and be 12 hours heat-up time;
3) the bark particle after will soaking is put into Φ 200L3.5m screw extrusion press top uncoupling type and is extruded, and extrudes type of elution extracting tannin extracting solution with 80 ℃ of hot water with single groove;
4) add Sodium Pyrosulfite in the extracting solution and carry out activation, concentrating the liquid concentrator degree Beaume that obtains is 16 ° of B é, obtains the solid tannin extract through spraying drying.
The tannin extract tannin content is analyzed:
| Seeds | Tannin % | Non-tannis % | Not tolerant % | Total extractum % | PH value |
| Blue gum | 74.2 | 21.1 | 1.4 | 96.7 | 4.75 |
Embodiment 4
As shown in Figure 1, present embodiment is that example is analyzed with the eucalyptus camaldulensis bark, and the step of the eucalyptus camaldulensis bark being carried out the tannin extraction is following:
1) after first mallee bark is removed impurity and drying, with crusher mallee bark is broken into sheet, size is about 25mm ~ 50mm, is best with 40mm in the present embodiment;
2) hot-water soak is put into the groove jar with the mallee bark of fragmentation, and the groove jar of present embodiment is the metal tin of 20m3, is that 1:5 adds water by the solid-liquid mass ratio, Heating temperature to 90 ℃, and be 17 hours heat-up time;
3) the bark particle after will soaking is put into Φ 200L3.5m screw extrusion press top uncoupling type and is extruded, with 90 ℃ of hot water with multiple tank recycling elution mode extracting tannin extracting solution;
4) add Sodium Pyrosulfite in the extracting solution and carry out activation, concentrating the liquid concentrator degree Beaume that obtains is 17 ° of B é, obtains the solid tannin extract through spraying drying.
The tannin extract tannin content is analyzed:
| Seeds | Tannin % | Non-tannis % | Not tolerant % | Total extractum % | PH value |
| Eucalyptus camaldulensis | 72.3 | 20.1 | 1.7 | 94.1 | 4.6 |
Embodiment 5
As shown in Figure 1, present embodiment is that example is analyzed with the flooded gum bark, and the step of the flooded gum bark being carried out the tannin extraction is following:
1) after first mallee bark is removed impurity and drying, with crusher mallee bark is broken into sheet, size is about 25mm ~ 50mm, is best with 45mm in the present embodiment;
2) hot-water soak is put into the groove jar with the mallee bark of fragmentation, and the groove jar of present embodiment is the metal tin of 20m3, is that 1:6 adds water by the solid-liquid mass ratio, Heating temperature to 95 ℃, and be 21 hours heat-up time;
3) the bark particle after will soaking is put into Φ 200L3.5m screw extrusion press top uncoupling type and is extruded, with 95 ℃ of hot water with multiple tank recycling elution mode extracting tannin extracting solution;
4) add Sodium Pyrosulfite in the extracting solution and carry out activation, concentrating the liquid concentrator degree Beaume that obtains is 17.5 ° of B é, obtains the solid tannin extract through spraying drying.
The tannin extract tannin content is analyzed:
| Seeds | Tannin % | Non-tannis % | Not tolerant % | Total extractum % | PH value |
| Flooded gum | 75.7 | 19.8 | 1.2 | 96.7 | 4.9 |
Embodiment 6
As shown in Figure 1, present embodiment is that example is analyzed with the leaflet mallee bark, and the step of the leaflet mallee bark being carried out the tannin extraction is following:
1) after first mallee bark is removed impurity and drying, with crusher mallee bark is broken into sheet, size is about 25mm ~ 50mm, is best with 50mm in the present embodiment;
2) hot-water soak is put into the groove jar with the mallee bark of fragmentation, and the groove jar of present embodiment is the metal tin of 20m3, is that 1:7 adds water by the solid-liquid mass ratio, Heating temperature to 100 ℃, and be 24 hours heat-up time;
3) the bark particle after will soaking is put into Φ 200L3.5m screw extrusion press top uncoupling type and is extruded, with 100 ℃ of hot water with multiple tank recycling elution mode extracting tannin extracting solution;
4) add Sodium Pyrosulfite in the extracting solution and carry out activation, concentrating the liquid concentrator degree Beaume that obtains is 18 ° of B é, obtains the solid tannin extract through spraying drying.
The tannin extract tannin content is analyzed:
| Seeds | Tannin % | Non-tannis % | Not tolerant % | Total extractum % | PH value |
| The leaflet eucalyptus | 74.4 | 22.5 | 1.3 | 98.2 | 4.78 |
Claims (5)
1. method of utilizing mallee bark to extract tannin is characterized in that may further comprise the steps:
1) with crusher mallee bark is pulverized;
2) hot-water soak is put into the groove jar with the mallee bark of fragmentation, and be 1 by the solid-liquid mass ratio: (2 ~ 7) add water, Heating temperature to 60 ℃ ~ 100 ℃, and be 2 h ~ 24 hours heat-up time;
3) bark after will soaking is with 60 ℃ ~ 100 ℃ hot-water extraction tannin extracting solutions;
4) add Sodium Pyrosulfite in the extracting solution and carry out activation, tannin extracting solution concentrate drying obtains fluid extract or solid tannin extract.
2. a kind of method of utilizing mallee bark to extract tannin according to claim 1, it is characterized in that: mallee bark is ground into thread.
3. a kind of method of utilizing mallee bark to extract tannin according to claim 1, it is characterized in that: mallee bark is ground into sheet.
4. a kind of method of utilizing mallee bark to extract tannin according to claim 1, it is characterized in that: said extracting groove jar is that single groove is extruded wash-out.
5. a kind of method of utilizing mallee bark to extract tannin according to claim 1, it is characterized in that: said extracting groove jar is the multiple tank recycling elution.
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| CN2010105402262A CN102050844B (en) | 2010-11-11 | 2010-11-11 | Method for extracting tannin by using eucalyptus barks |
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| CN102050844B true CN102050844B (en) | 2012-11-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103265892A (en) * | 2013-05-27 | 2013-08-28 | 广西壮族自治区林业科学研究院 | Method for purifying eucalyptus tannin |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104974198A (en) * | 2015-06-15 | 2015-10-14 | 广西大学 | Process of extracting tannin from pine bark |
| DK3453743T3 (en) * | 2017-09-12 | 2021-03-22 | Soedra Skogsaegarna Ekonomiska Foerening | PROCEDURE FOR PRODUCING AT LEAST ONE TANIC ACID PRODUCT AND ONE BARK PRODUCT WITH INCREASED CURRENT VALUE |
| CN110876389A (en) * | 2019-11-07 | 2020-03-13 | 皖西学院 | Method for efficiently extracting natural insecticide from eucalyptus bark |
| CN112458132A (en) * | 2020-11-17 | 2021-03-09 | 汕头大学 | Method for preparing multi-element antibacterial probiotic by using single raw material |
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| CN101492267A (en) * | 2009-03-06 | 2009-07-29 | 中南林业科技大学 | Method for producing high-efficiency concrete additive by using bark rich in tannic acid |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492267A (en) * | 2009-03-06 | 2009-07-29 | 中南林业科技大学 | Method for producing high-efficiency concrete additive by using bark rich in tannic acid |
Non-Patent Citations (2)
| Title |
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| 湛年勇等.桉树皮单宁分析.《生物质化学工程》.2009,第43卷(第5期),39-41. * |
| 秦玉楠.利用废树皮、果壳提取栲胶.《环境保护》.1993,(第11期),34. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103265892A (en) * | 2013-05-27 | 2013-08-28 | 广西壮族自治区林业科学研究院 | Method for purifying eucalyptus tannin |
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Granted publication date: 20121107 Termination date: 20211111 |