WO2015089684A1 - Method for preparation of tea tannin extract by leaching - Google Patents
Method for preparation of tea tannin extract by leaching Download PDFInfo
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- WO2015089684A1 WO2015089684A1 PCT/CN2013/001564 CN2013001564W WO2015089684A1 WO 2015089684 A1 WO2015089684 A1 WO 2015089684A1 CN 2013001564 W CN2013001564 W CN 2013001564W WO 2015089684 A1 WO2015089684 A1 WO 2015089684A1
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- minutes
- water
- tea
- water bath
- filtering
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- 238000002386 leaching Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 15
- LSHVYAFMTMFKBA-TZIWHRDSSA-N (-)-epicatechin-3-O-gallate Chemical compound O([C@@H]1CC2=C(O)C=C(C=C2O[C@@H]1C=1C=C(O)C(O)=CC=1)O)C(=O)C1=CC(O)=C(O)C(O)=C1 LSHVYAFMTMFKBA-TZIWHRDSSA-N 0.000 title claims abstract description 11
- 238000002360 preparation method Methods 0.000 title abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 241001122767 Theaceae Species 0.000 claims abstract description 35
- 239000000843 powder Substances 0.000 claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 238000002791 soaking Methods 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 238000000605 extraction Methods 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 7
- 238000010298 pulverizing process Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims 2
- 238000002156 mixing Methods 0.000 claims 2
- 230000008020 evaporation Effects 0.000 claims 1
- 239000000047 product Substances 0.000 abstract description 6
- 239000000706 filtrate Substances 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 239000002075 main ingredient Substances 0.000 description 2
- GUTLYIVDDKVIGB-OUBTZVSYSA-N Cobalt-60 Chemical compound [60Co] GUTLYIVDDKVIGB-OUBTZVSYSA-N 0.000 description 1
- 241001282315 Nemesis Species 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 229930002877 anthocyanin Natural products 0.000 description 1
- 235000010208 anthocyanin Nutrition 0.000 description 1
- 239000004410 anthocyanin Substances 0.000 description 1
- 150000004636 anthocyanins Chemical class 0.000 description 1
- 230000003471 anti-radiation Effects 0.000 description 1
- 210000001185 bone marrow Anatomy 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001784 detoxification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229930003935 flavonoid Natural products 0.000 description 1
- 235000017173 flavonoids Nutrition 0.000 description 1
- 150000002215 flavonoids Chemical class 0.000 description 1
- HVQAJTFOCKOKIN-UHFFFAOYSA-N flavonol Natural products O1C2=CC=CC=C2C(=O)C(O)=C1C1=CC=CC=C1 HVQAJTFOCKOKIN-UHFFFAOYSA-N 0.000 description 1
- 150000002216 flavonol derivatives Chemical class 0.000 description 1
- 235000011957 flavonols Nutrition 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 150000007965 phenolic acids Chemical class 0.000 description 1
- 235000009048 phenolic acids Nutrition 0.000 description 1
- 150000008442 polyphenolic compounds Chemical class 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- NHDHVHZZCFYRSB-UHFFFAOYSA-N pyriproxyfen Chemical compound C=1C=CC=NC=1OC(C)COC(C=C1)=CC=C1OC1=CC=CC=C1 NHDHVHZZCFYRSB-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/16—Tea extraction; Tea extracts; Treating tea extract; Making instant tea
- A23F3/18—Extraction of water soluble tea constituents
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/16—Tea extraction; Tea extracts; Treating tea extract; Making instant tea
- A23F3/22—Drying or concentrating tea extract
- A23F3/225—Drying or concentrating tea extract by evaporation, e.g. drying in thin layers, foam drying
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
- A23L33/105—Plant extracts, their artificial duplicates or their derivatives
Definitions
- the invention relates to a method for extracting tea component, in particular to a method for preparing tea tannin by extracting method.
- Tea tannin is a general term for polyphenols in tea, including xanthyl alcohol, anthocyanins, flavonoids, flavonols and phenolic acids. It is one of the main ingredients of tea color and fragrance, and it is also a health care in tea. One of the main ingredients of the function. Studies have shown that active substances such as tea tannin have detoxification and anti-radiation effects, can effectively prevent radioactive substances from invading the bone marrow, and can quickly excrete ⁇ 90 and cobalt 60 from the body, and are regarded as radiation nemesis by the health and medical circles.
- the technical problem to be solved by the present invention is to provide a new extraction method for extracting tea tannins in view of the deficiencies of the prior art.
- the present invention is a preparation method for extracting tea tannin by leaching method, which is characterized in that the steps are as follows: removing the impurities from the tea leaves and pulverizing into 70- 90-mesh tea powder, then add water to the tea powder, the weight ratio of tea powder to water is 1: 40 50; after soaking for 20-40 minutes at room temperature, the water bath is heated to 75-80 V, and continuously stirred 20- After 25 minutes, the first extraction solution is obtained after filtration; then water is added to the residue to filter the residue, and the water bath is heated to 75-80 ° C for 10-15 minutes, and the second extraction solution is filtered; Adding water to the residue to filter the slag, heating to 75-80 ° C in a water bath, and stirring for 8-10 minutes, filtering to obtain the third leaching solution, the first leaching solution, the second leaching solution and The third leaching solution is mixed together, and vacuum is evaporated in a vacuum to obtain a dry matter
- the technical problem to be solved by the present invention is achieved by the following technical solutions: removing the impurities from the tea leaves, pulverizing into 80-mesh tea powder, and then adding fresh water to the tea powder, the weight ratio of the tea powder to the water is 1:50; After soaking for 30 minutes at room temperature, the water bath is heated to 80 ° C, and stirring for 20 minutes, after filtering, the first extraction liquid is obtained; then water is added to the residue to filter the residue, and the water bath is heated to 80 ° C, maintaining 15 Minute, filter to obtain the second leaching solution; continue to add water to the filter residue without filtering the slag, heated to 80 ° C in a water bath, and continuously stirred for 10 minutes, filtered to obtain the third leaching solution, the first immersion
- the liquid extract, the second extraction liquid and the third extraction liquid are mixed together, and evaporated in a vacuum to obtain a dry matter, wherein the vacuum is 80 kPa, and the dry matter is washed with anhydrous ethanol for 5 times and then dried
- the process of the invention is simple, and no chemical substances are used except for alcohol, thereby ensuring the food safety of the product.
- Example 1 A preparation method for extracting tea tannin by a leaching method is as follows: A tea waste material such as a general tea leaf powder is used as an extraction raw material to remove impurities and pulverize. 1 kg of tea leaves are crushed and sieved to obtain 70-90 mesh tea powder, and then water is added to the tea powder, the weight ratio of tea powder to water is 1: 40-50; after soaking for 20-40 minutes at room temperature, The water bath is heated to 75-80 °C, and continuously stirred for 20-25 minutes. After filtering, the first extraction liquid is obtained. Then, water is added to the filter residue without filtering the slag, and the water bath is heated to 75-80 ° C to maintain 10-15.
- a tea waste material such as a general tea leaf powder is used as an extraction raw material to remove impurities and pulverize. 1 kg of tea leaves are crushed and sieved to obtain 70-90 mesh tea powder, and then water is added to the tea powder, the weight ratio of tea powder to water is 1: 40-50; after soaking for 20
- filter to obtain the second leaching solution continue to add water to the filter residue without filtering the slag, heat the water bath to 75-80 ⁇ , and continue to stir for 8-10 minutes, filter to obtain the third leaching solution, will be the first
- the leaching solution, the second leaching solution and the third leaching solution are mixed together, and evaporated in a vacuum to obtain a dry matter, wherein the degree of vacuum is 70-90 kPa, and finally the dry matter is washed with anhydrous ethanol. After -6 times drying, the finished product can be obtained.
- Example 2 in the preparation method for extracting tea tannin by the leaching method described in Example 1, the tea leaves are decontaminated, pulverized into 80-mesh tea powder, and then 50 kg of water is added to the tea powder, and immersed in a room temperature environment. After a minute, the water bath is heated to 80 ° C and stirred for 20 minutes, then filtered and Rapidly reduce the temperature of the filtrate to below 15 °C, that is, the first leaching solution; add water to the filter residue without filtering the slag, heat the water bath to 80 ° C for 15 minutes, filter and quickly reduce the temperature of the filtrate to 15 ° Below C, the second extraction liquid is obtained; further, water is added to the residue to filter the residue, the water bath is heated to 80 ° C, and stirring is continued for 10 minutes, filtering and rapidly lowering the temperature of the filtrate to below 15 ° C.
- the third leaching solution is mixed with the first leaching solution, the second leaching solution and the third leaching solution, and evaporated under vacuum to obtain a dry matter, wherein the degree of vacuum is 80 kPa, the temperature After 25 ° C or less, the dry matter is finally washed with anhydrous ethanol for 5 times and then dried to obtain a finished product.
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Botany (AREA)
- Mycology (AREA)
- Health & Medical Sciences (AREA)
- Nutrition Science (AREA)
- Extraction Or Liquid Replacement (AREA)
- Medicines Containing Plant Substances (AREA)
Abstract
The present invention discloses a method for preparation of tea tannin extract by leaching; typically selecting tea leaf powder and tea leaf scraps for use as raw materials; discarding impurities from the tea leaves, crushing and passing the leaves through a 70-90 mesh screen, placing into a container, adding clean water of an amount 40-50 times that of the tea leaves, soaking for 20-40 minutes under ambient temperature conditions, then rapidly heating to 75-80°C in a water bath, and continuously stirring for 20-25 minutes and filtering; saving the filtrate, adding water to residue over tea leaves, heating to 75-80°C in a water bath, holding for 10-15 minutes and filtering; continuing to add water to the residue, heating in the water bath, and stirring continuously for 8-10 minutes and filtering. The three filtrates are combined, evaporated under reduced pressure, and the dry matter is washed with absolute ethanol, then dried. The process of the present invention is simple and no chemicals are used other than alcohol, thus ensuring the safety of the edible product.
Description
浸提法提取茶单宁的制备方法 Method for preparing tea tannin by extracting method
技术领域 Technical field
本发明涉及一种茶叶成分提取方法， 具体涉及一种浸提法提取茶单宁的 制备方法。 The invention relates to a method for extracting tea component, in particular to a method for preparing tea tannin by extracting method.
背景技术 Background technique
茶单宁是茶叶中多酚类物质的总称， 包括黄垸醇类、 花色苷类、 黄酮类、 黄酮醇类和酚酸类等， 是茶叶色香味的主要成份之一， 也是茶叶中有保健功 能的主要成份之一。 研究表明， 茶单宁等活性物质具解毒和抗辐射作用， 能 有效地阻止放射性物质侵入骨髓， 并可使锶 90和钴 60迅速排出体外， 被健 康及医学界誉为辐射克星。 Tea tannin is a general term for polyphenols in tea, including xanthyl alcohol, anthocyanins, flavonoids, flavonols and phenolic acids. It is one of the main ingredients of tea color and fragrance, and it is also a health care in tea. One of the main ingredients of the function. Studies have shown that active substances such as tea tannin have detoxification and anti-radiation effects, can effectively prevent radioactive substances from invading the bone marrow, and can quickly excrete 锶90 and cobalt 60 from the body, and are regarded as radiation nemesis by the health and medical circles.
发明内容 Summary of the invention
本发明所要解决的技术问题是针对现有技术的不足， 提供一种新的浸提 法提取茶单宁的制备方法。 The technical problem to be solved by the present invention is to provide a new extraction method for extracting tea tannins in view of the deficiencies of the prior art.
本发明所要解决的技术问题是通过以下的技术方案来实现的， 本发明是 一种浸提法提取茶单宁的制备方法， 其特点是， 其步骤如下： 将茶叶去除杂 质， 粉碎成 70-90目的茶叶粉末， 然后向茶叶粉末中加入清水， 茶叶粉末与清 水的重量比为 1 : 40 50 ; 在室温环境下浸泡 20-40分钟后， 水浴加热至 75-80 V， 并不断搅拌 20-25分钟， 后过滤即得第一遍浸提液； 再向滤渣中加水没过 滤渣， 水浴加热至 75-80°C， 保持 10- 15分钟， 过滤即得第二遍浸提液； 再继 续向滤渣中加水没过滤渣， 水浴加热至 75-80°C， 并不断搅拌 8-10分钟， 过 滤即得第三遍浸提液， 将第一遍浸提液、 第二遍浸提液和第三遍浸提液混合 在一起， 在真空环境下真空蒸发得到干物质， 其中真空度为 70-90kPa， 将干 物质用无水乙醇洗涤 2-6次后干燥， 即可得成品。 The technical problem to be solved by the present invention is achieved by the following technical solution. The present invention is a preparation method for extracting tea tannin by leaching method, which is characterized in that the steps are as follows: removing the impurities from the tea leaves and pulverizing into 70- 90-mesh tea powder, then add water to the tea powder, the weight ratio of tea powder to water is 1: 40 50; after soaking for 20-40 minutes at room temperature, the water bath is heated to 75-80 V, and continuously stirred 20- After 25 minutes, the first extraction solution is obtained after filtration; then water is added to the residue to filter the residue, and the water bath is heated to 75-80 ° C for 10-15 minutes, and the second extraction solution is filtered; Adding water to the residue to filter the slag, heating to 75-80 ° C in a water bath, and stirring for 8-10 minutes, filtering to obtain the third leaching solution, the first leaching solution, the second leaching solution and The third leaching solution is mixed together, and vacuum is evaporated in a vacuum to obtain a dry matter, wherein the degree of vacuum is 70-90 kPa, and the dry matter is washed with anhydrous ethanol for 2-6 times and then dried to obtain a finished product.
1 1
确认本
本发明所要解决的技术问题是通过以下的技术方案来实现的， 将茶叶去 除杂质， 粉碎成 80目的茶叶粉末， 然后向茶叶粉末中加入清水， 茶叶粉末与 清水的重量比为 1 : 50 ; 在室温环境下浸泡 30分钟后， 水浴加热至 80°C， 并 不断搅拌 20分钟， 后过滤即得第一遍浸提液； 再向滤渣中加水没过滤渣， 水 浴加热至 80°C， 保持 15分钟， 过滤即得第二遍浸提液； 再继续向滤渣中加水 没过滤渣， 水浴加热至 80°C， 并不断搅拌 10分钟， 过滤即得第三遍浸提液， 将第一遍浸提液、 第二遍浸提液和第三遍浸提液混合在一起， 在真空环境下 真空蒸发得到干物质， 其中真空度为 80kPa， 将干物质用无水乙醇洗涤 5次后 干燥， 即可得成品。 Confirmation The technical problem to be solved by the present invention is achieved by the following technical solutions: removing the impurities from the tea leaves, pulverizing into 80-mesh tea powder, and then adding fresh water to the tea powder, the weight ratio of the tea powder to the water is 1:50; After soaking for 30 minutes at room temperature, the water bath is heated to 80 ° C, and stirring for 20 minutes, after filtering, the first extraction liquid is obtained; then water is added to the residue to filter the residue, and the water bath is heated to 80 ° C, maintaining 15 Minute, filter to obtain the second leaching solution; continue to add water to the filter residue without filtering the slag, heated to 80 ° C in a water bath, and continuously stirred for 10 minutes, filtered to obtain the third leaching solution, the first immersion The liquid extract, the second extraction liquid and the third extraction liquid are mixed together, and evaporated in a vacuum to obtain a dry matter, wherein the vacuum is 80 kPa, and the dry matter is washed with anhydrous ethanol for 5 times and then dried, that is, Available products.
与现有技术相比， 本发明工艺简单， 除了酒精以外， 不使用任何其他化 学物质， 从而保证了产品的食用安全。 Compared with the prior art, the process of the invention is simple, and no chemical substances are used except for alcohol, thereby ensuring the food safety of the product.
具体实施方式 detailed description
实施例 1， 一种浸提法提取茶单宁的制备方法， 其步骤如下： 选用一般茶 叶粉末等茶叶下脚料作为提取原料， 去除杂质， 粉碎。 将 1 公斤茶叶经过粉 碎并过筛得到 70-90目的茶叶粉末，然后向茶叶粉末中加入清水， 茶叶粉末与 清水的重量比为 1 : 40-50 ;在室温环境下浸泡 20-40分钟后，水浴加热至 75-80 °C， 并不断搅拌 20-25分钟， 后过滤即得第一遍浸提液； 再向滤渣中加水没过 滤渣， 水浴加热至 75-80°C， 保持 10- 15分钟， 过滤即得第二遍浸提液； 再继 续向滤渣中加水没过滤渣， 水浴加热至 75-80Ό , 并不断搅拌 8-10分钟， 过 滤即得第三遍浸提液， 将第一遍浸提液、 第二遍浸提液和第三遍浸提液混合 在一起， 在真空环境下真空蒸发得到干物质， 其中真空度为 70-90kPa， 最后 将干物质用无水乙醇洗涤 2-6次后干燥， 即可得成品。 Example 1 A preparation method for extracting tea tannin by a leaching method is as follows: A tea waste material such as a general tea leaf powder is used as an extraction raw material to remove impurities and pulverize. 1 kg of tea leaves are crushed and sieved to obtain 70-90 mesh tea powder, and then water is added to the tea powder, the weight ratio of tea powder to water is 1: 40-50; after soaking for 20-40 minutes at room temperature, The water bath is heated to 75-80 °C, and continuously stirred for 20-25 minutes. After filtering, the first extraction liquid is obtained. Then, water is added to the filter residue without filtering the slag, and the water bath is heated to 75-80 ° C to maintain 10-15. Minute, filter to obtain the second leaching solution; continue to add water to the filter residue without filtering the slag, heat the water bath to 75-80 Ό, and continue to stir for 8-10 minutes, filter to obtain the third leaching solution, will be the first The leaching solution, the second leaching solution and the third leaching solution are mixed together, and evaporated in a vacuum to obtain a dry matter, wherein the degree of vacuum is 70-90 kPa, and finally the dry matter is washed with anhydrous ethanol. After -6 times drying, the finished product can be obtained.
实施例 2， 实施例 1所述的浸提法提取茶单宁的制备方法中， 将茶叶去除 杂质， 粉碎成 80 目的茶叶粉末， 然后向茶叶粉末中加入 50公斤清水， 在室 温环境下浸泡 30分钟后， 水浴加热至 80°C， 并不断搅拌 20分钟， 后过滤并
迅速将滤液温度降至 15 °C以下， 即得第一遍浸提液； 再向滤渣中加水没过滤 渣， 水浴加热至 80°C， 保持 15分钟， 过滤并迅速将滤液温度降至 15°C以下， 即得第二遍浸提液； 再继续向滤渣中加水没过滤渣， 水浴加热至 80°C， 并不 断搅拌 10分钟， 过滤并迅速将滤液温度降至 15 °C以下， 即得第三遍浸提液， 将第一遍浸提液、 第二遍浸提液和第三遍浸提液混合在一起， 在真空环境下 真空蒸发得到干物质， 其中真空度为 80kPa，， 温度为 25 °C以下， 最后将干物 质用无水乙醇洗涤 5次后干燥， 即可得成品。
Example 2, in the preparation method for extracting tea tannin by the leaching method described in Example 1, the tea leaves are decontaminated, pulverized into 80-mesh tea powder, and then 50 kg of water is added to the tea powder, and immersed in a room temperature environment. After a minute, the water bath is heated to 80 ° C and stirred for 20 minutes, then filtered and Rapidly reduce the temperature of the filtrate to below 15 °C, that is, the first leaching solution; add water to the filter residue without filtering the slag, heat the water bath to 80 ° C for 15 minutes, filter and quickly reduce the temperature of the filtrate to 15 ° Below C, the second extraction liquid is obtained; further, water is added to the residue to filter the residue, the water bath is heated to 80 ° C, and stirring is continued for 10 minutes, filtering and rapidly lowering the temperature of the filtrate to below 15 ° C. The third leaching solution is mixed with the first leaching solution, the second leaching solution and the third leaching solution, and evaporated under vacuum to obtain a dry matter, wherein the degree of vacuum is 80 kPa, the temperature After 25 ° C or less, the dry matter is finally washed with anhydrous ethanol for 5 times and then dried to obtain a finished product.
Claims
权 利 要 求 书 、 一种浸提法提取茶单宁的制备方法， 其特征在于： 其步骤如下： 将茶叶 去除杂质， 粉碎成 70-90目的茶叶粉末， 然后向茶叶粉末中加入清水， 茶叶粉末与清水的重量比为 1 : 40-50;在室温环境下浸泡 20-40分钟后， 水浴加热至 75-80°C， 并不断搅拌 20-25分钟， 后过滤即得第一遍浸提 液； 再向滤渣中加水没过滤渣， 水浴加热至 75-80°C , 保持 10-15分钟， 过滤即得第二遍浸提液： 再继续向滤渣中加水没过滤渣， 水浴加热至 75-80'C， 并不断搅拌 8-10分钟， 过滤即得第三遍浸提液， 将第一遍浸 提液、 第二遍浸提液和第三遍浸提液混合在一起， 在真空环境下真空蒸 发得到干物质， 其中真空度为 70-90kPa， 将干物质用无水乙醇洗涤 2-6 次后干燥， 即可得成品。 The invention provides a method for preparing a tea tannin by extracting, characterized in that: the steps are as follows: removing the impurities from the tea leaves, pulverizing into 70-90 mesh tea powder, and then adding clear water to the tea powder, the tea powder and The weight ratio of clean water is 1: 40-50; after soaking for 20-40 minutes at room temperature, the water bath is heated to 75-80 ° C, and stirring is continued for 20-25 minutes, and then filtered to obtain the first extraction liquid; Add water to the filter residue without filtering the slag, heat it to 75-80 ° C in water bath for 10-15 minutes, and filter to obtain the second leaching solution: continue to add water to the filter residue without filtering the slag, and heat the water bath to 75-80 'C, and stirring for 8-10 minutes, filtering to obtain the third extraction liquid, mixing the first extraction liquid, the second extraction liquid and the third extraction liquid in a vacuum environment Evaporation in a vacuum to obtain a dry matter, wherein the degree of vacuum is 70-90 kPa, and the dry matter is washed with anhydrous ethanol for 2-6 times and then dried to obtain a finished product.
、 根据权利要求 1所述浸提法提取茶单宁的制备方法， 其特征在于： 将茶 叶去除杂质， 粉碎成 80 目的茶叶粉末， 然后向茶叶粉末中加入清水， 茶叶粉末与清水的重量比为 1 : 50 ; 在室温环境下浸泡 30分钟后， 水浴 加热至 80°C， 并不断搅拌 20分钟， 后过滤即得第一遍浸提液； 再向滤 渣中加水没过滤渣， 水浴加热至 80°C， 保持 15分钟， 过滤即得第二遍 浸提液； 再继续向滤渣中加水没过滤渣， 水浴加热至 80°C， 并不断搅拌 10分钟， 过滤即得第三遍浸提液， 将第一遍浸提液、 第二遍浸提液和第 三遍浸提液混合在一起， 在真空环境下真空蒸发得到干物质， 其中真空 度为 80kPa， 将干物质用无水乙醇洗涤 5次后干燥， 即可得成品。
The method for preparing tea tannin by extracting according to claim 1, wherein: the tea leaves are decontaminated, pulverized into 80-mesh tea powder, and then water is added to the tea powder, and the weight ratio of the tea powder to the water is 1 : 50 ; After soaking for 30 minutes at room temperature, the water bath is heated to 80 ° C, and stirring for 20 minutes, after filtering, the first extraction liquid is obtained; then water is added to the residue to filter the residue, and the water bath is heated to 80. °C, hold for 15 minutes, filter to obtain the second extraction solution; continue to add water to the filter residue without filtration residue, heat to 80 ° C in a water bath, and continue to stir for 10 minutes, filter to obtain the third extraction, Mixing the first leaching solution, the second leaching solution and the third leaching solution together, and evaporating in a vacuum under vacuum to obtain a dry matter, wherein the degree of vacuum is 80 kPa, and the dry matter is washed with absolute ethanol. After drying, the finished product can be obtained.
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| CN107348445A (en) * | 2017-07-14 | 2017-11-17 | 西北农林科技大学 | A kind of preparation method of natural edible acorn nut powder |
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