WO2021209667A1 - Procedimiento de obtención de un extracto botánico - Google Patents
Procedimiento de obtención de un extracto botánico Download PDFInfo
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- WO2021209667A1 WO2021209667A1 PCT/ES2021/070245 ES2021070245W WO2021209667A1 WO 2021209667 A1 WO2021209667 A1 WO 2021209667A1 ES 2021070245 W ES2021070245 W ES 2021070245W WO 2021209667 A1 WO2021209667 A1 WO 2021209667A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
- A61K36/87—Vitaceae or Ampelidaceae (Vine or Grape family), e.g. wine grapes, muscadine or peppervine
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/13—Coniferophyta (gymnosperms)
- A61K36/15—Pinaceae (Pine family), e.g. pine or cedar
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
- A61K36/21—Amaranthaceae (Amaranth family), e.g. pigweed, rockwort or globe amaranth
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
- A61K36/31—Brassicaceae or Cruciferae (Mustard family), e.g. broccoli, cabbage or kohlrabi
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
- A61K36/42—Cucurbitaceae (Cucumber family)
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
- A61K36/44—Ebenaceae (Ebony family), e.g. persimmon
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
- A61K36/57—Magnoliaceae (Magnolia family)
- A61K36/575—Magnolia
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
- A61K36/73—Rosaceae (Rose family), e.g. strawberry, chokeberry, blackberry, pear or firethorn
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
- A61K36/75—Rutaceae (Rue family)
- A61K36/752—Citrus, e.g. lime, orange or lemon
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/88—Liliopsida (monocotyledons)
- A61K36/906—Zingiberaceae (Ginger family)
- A61K36/9066—Curcuma, e.g. common turmeric, East Indian arrowroot or mango ginger
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
- A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2236/00—Isolation or extraction methods of medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicine
Definitions
- the present invention refers to a process for the preparation of different botanical extracts enriched in active principles from plant raw material for use in the cosmetic, chemical, pharmaceutical, food industry, among others, in which a step of cross flow filtration (FFT).
- FFT cross flow filtration
- Botanical extracts have a great multitude of properties, such as digestion stimulants, antidiarrheal, antiseptic, anti-inflammatory, appetite stimulants, gastric stimulants, among many other properties.
- botanical extracts are a source of new molecules with pharmacological effects, which are directly usable and which allow obtaining pharmaceutical products with fewer side effects and meeting the growing needs of the use of natural products.
- botanical extracts are usually obtained by a solid-liquid extraction in which extraction methods by maceration and percolation or leaching are the most used.
- the vegetable extract obtained must be characterized in terms of its active substances and markers, density, residual solvents, total solids, pH, microbiological control and content of impurities such as pesticides, heavy metals or other potentially unwanted compounds such as alkaloids, aflatoxins, among other parameters.
- the inventors of the present invention have surprisingly discovered that with the use of a process comprising an extraction stage with ultrapure water and a tangential flow filtration stage it is possible to obtain a great variety of botanical extracts with suitable quality characteristics. , without the need to use different parameters in each of the botanical extracts. Therefore, the combination of an extraction stage with ultrapure water and a purification stage by tangential flow filtration allows the enrichment of some of the active principles of the botanical extract, maintaining the medicinal and / or cosmetic properties of said extract. Surprisingly, with the combination of these stages, it is possible to increase the recovery performance, concentration and purity of the active principle, as well as to decrease the content of sulfuric ash, the content of heavy metals, the conductivity and the duration of the drying stage. In addition, it is possible to extend the useful life of the equipment and devices used in the manufacturing process.
- Tangential flow filtration is a very versatile technique that allows from removing suspended solids to purifying compounds, depending on the membrane
- SUBSTITUTE SHEET (RULE 26) selected.
- the recirculation of the product under pressure prevents clogging of the filters, allowing filtrations that with another type of filter would be unfeasible.
- cross-flow filtration can also purify extracts.
- the FFT technique consists of a recirculation stream under pressure and a permeated liquid flow that passes through the membranes.
- the substance of interest polyphenols or other molecules of the extract obtained
- the compound will undergo a purification process to a greater or lesser extent. This technique ensures a stability of the yields of the desired level of filtration.
- this tangential flow filtration can be used even in processes that use organic solvents, with membranes suitable for the same, as well as aqueous solvents and even water.
- tangential flow filtration allows that the botanical extract does not need to be subjected to chemical or physical processes (such as heating processes) for its purification and that could decrease its quality due to the degradation of the possible thermolabile substances that make it up.
- the improvement of the extraction procedure allows to overcome the barriers of industrialization given by the difficulty of scaling the processes in the case of raw materials of vegetable origin, which allows working with a large amount of raw materials and obtaining quantities of product enriched in principles active ingredients with very high purity.
- This difficulty can be summarized in the concept of the relationship raw material versus the final extract known as drug-to-extract ratio (DER, for its acronym in English).
- DER drug-to-extract ratio
- the DER values are between 4 and 1, and even between 200 and 1 or higher, and can be up to 1000 to 1.
- plant raw material refers to everything that can be used or consumed directly from nature and that is transformed to make plant extracts that will later become consumer goods.
- SUBSTITUTE SHEET (RULE 26) Vegetable matter can be obtained from the root, leaves, stem, fruit, seeds, inflorescence, among other parts of plants.
- the present invention discloses a process for preparing a botanical extract characterized in that it comprises the steps of: (a) extracting a plant matter with ultrapure water, and separating the solid plant matter from the liquid fraction; (b) concentrating the liquid fraction; (c) purifying the liquid fraction obtained in step b) by tangential flow filtration.
- Ultrapure water is composed exclusively of water molecules with hydrogen and hydroxyl ions that are in equilibrium (10 7 M at 25 e C), which gives it a characteristic electrical resistivity of 18.2 MOhm.cm. Additionally, ultrapure water is 99.999999975% pure and lacks all non-gaseous and non-inorganic elements. For example, one type of ultrapure water is that obtained by several successive stages of reverse osmosis.
- the vegetable matter is selected from the group consisting of pomegranate, cucumber, broccoli, strawberries, Epilobium angustifolium, blueberry, red grape or vine, chamomile, passionflower, parsley, sage, arnica, mint, citrus, orange, lemon, grapefruit, cinnamon , Serenos repens, nettle, sunflower, spinach, olive leaf, magnolia, bearberry, grape seed, olive, cannabis, coffee beans, artichoke, yerba mate, cocoa, Thea sinensis, ginseng, horse chestnut, Turmeric, bark of pine, artichoke, echinacea, ginseng, persimmon, pear, broccoli, among others.
- the final extract obtained contains the active principles selected from the group consisting of alkaloids, ellagitannins, anthocyanins, flavones and flavonols, flavonoids, sterols, ecdysteroids, steroids, iridoids, lignans, phenols, curcuminoids, cannabinoids, phenylpropanoids, saponins, procyanins, procyanins isothiocyanates, imino and amino sugars, among others. More preferably, said active principle is not abscisic acid.
- the vegetable matter can be subjected to extraction in a fresh state or, with the aim of making its conservation viable, in a dry state.
- the vegetable matter is dry.
- the water content in said vegetable matter is not more than 10% by weight.
- SUBSTITUTE SHEET (RULE 26)
- said plant material can be used whole, or mechanically crushed, as a stage prior to extraction.
- any of the methods available to the person skilled in the art for grinding or cutting the plant material are suitable.
- the plant material used for the extraction may be the result of some previous industrial transformation, such as by-products of the food industry, among others.
- a volume of solvent is used equivalent to between 3 and 6 times the weight of the vegetable matter to be extracted.
- the extraction is carried out at a temperature between 50 and 75 C and C.
- the size of the membrane in the tangential flow filtration is between 100 Da and 100,000 Da.
- the pressure in the tangential flow filtration is between 4 and 30 bar.
- the pH in the cross-flow filtration stage is between 2 and 9. More preferably, the pH in the cross-flow filtration stage is between 2 and 5.
- Flowability enhancing agents can be used. of the liquids to pass through the filtration membrane. These agents must be soluble in the solvent of the solution to be filtered and can be of a different nature as surfactants or surfactants, thickeners, emulsifiers, among others. Among them, glycerin or propylene glycol can be used preferably if an agent is necessary for this purpose.
- the present invention discloses a composition
- a composition comprising active principles selected from the group consisting of alkaloids, ellagitannins, anthocyanins, flavones and flavonols, flavonoids, sterols, ecdysteroids, steroids, iridoids, lignans, phenols, curcuminoids, cannabinoids, phenylpropanoids , saponins, oligomeric procyanidins, isothiocyanates, imino and amino sugars, among others.
- said active principle is not abscisic acid.
- said a composition comprising at least one additional component.
- the additional component is selected from the group consisting of colloidal silica, talc, tricalcium phosphate, magnesium stearate, carbohydrates, polysaccharides, maltodextrins, cyclodextrins, water, polyalcohols, celluloses, starches, and mixtures thereof.
- the additional component is present between 0.5% (w / w) and 35% (w / w). More preferably about 20% (w / w) maltodextrin. Even more preferably, about 2% (w / w) of silicon dioxide or tricalcium phosphate.
- EXAMPLE 1 Preparation of 10 kg of crushed cucumbers mixed with 30 kg of purified water.
- the mixture was subjected to a temperature of 70 C and using two extraction steps.
- the vegetable matter was separated from the micelle by means of a solid-liquid filtration resulting in a liquid with a solids concentration of 6%.
- Said micelle was subjected to a tangential filtration process using a filtration cartridge with a nanofiltration membrane (300 Da). The working pressure during the
- the result of the filtration was that 80% of the active principle (total amino derivatives, including imino and amino sugars) was recovered in the concentrate phase.
- the purity of the active principle in the final product was 12% in the permeate phase, which meant a 3-fold purification of the initial content.
- EXAMPLE 2 Preparation of 10 kg of crushed cucumbers mixed with 30 kg of purified water.
- the mixture was subjected to a temperature of 70 C and using two extraction steps.
- the vegetable matter was separated from the micelle by a solid-liquid filtration resulting in a liquid with a solids concentration of 6%.
- Said micelle was subjected to a tangential filtration process using a filtration cartridge with a nanofiltration membrane (300 Da).
- the pH of the micelle was adjusted to a value between 2-5 by adding a mineral acid.
- the working pressure during the filtration process was between 4-30 bars.
- the result of the filtration was that 80% of the active principle (total amino derivatives) was recovered in the concentrate phase.
- the purity of the active principle in the final product was 17% in the permeate phase, which meant a 4-fold purification of the initial content.
- the pH adjustment achieved an unexpected and not obvious effect at first purification in the extract subjected to filtration through the membrane.
- EXAMPLE 3 Preparation of 10 kg of crushed cucumbers mixed with 30 kg of purified water.
- the mixture was subjected to a temperature of 50 C and plant matter and micelle was removed by filtration resulting solid-liquid a liquid with a solids concentration of 6%.
- Said micelle was subjected to a tangential filtration process using a filtration cartridge with a nanofiltration membrane (300 Da). For this process, the pH of the micelle was adjusted to a value between 2-5
- 2% glycerin was added to the mixture and the working pressure during the filtration process was between 4-30 bars.
- the result of the filtration was that 83% of the active principle (total amino derivatives) was recovered in the concentrate phase.
- the purity of the active principle in the final product was 25% in the permeate phase, which meant a 6-fold purification of the initial content.
- EXAMPLE 4 Extraction of 5 kg of Magnolia bark with a mixture of alcohol and water of 60% at 55 C and using two extraction steps.
- the vegetable matter was separated from the micelle by means of a solid-liquid filtration, resulting in a liquid with a solids concentration of 4.5% and a flavonolignans content of 2.5%.
- Said micelle was subjected to a tangential filtration process using a filter cartridge with a membrane with a high pore size pore (1,000-10,000 Da) and suitable for the passage of organic solvents.
- the pH of the micelle was adjusted to a value between 5-9 by adding a mineral base.
- the working pressure during the filtration process was between 4-30 bars.
- EXAMPLE 5 Extraction of 8 kg of crushed turmeric root with 30 kg of alcohol reduced with 85% water.
- the vegetable matter was separated from the micelle by means of a solid-liquid filtration, resulting in a liquid with a solids concentration of 3.0% and a content of
- SUBSTITUTE SHEET (RULE 26) 17% curcuminoids.
- Said micelle was subjected to a tangential filtration process using a filtration cartridge with a nanofiltration membrane capable of filtering substances dissolved in organic solvents (300 Da).
- the pH of the micelle was adjusted to a value between 7 and 8.5 by adding an alkaline substance (sodium bicarbonate).
- the working pressure during the filtration process was between 4-30 bars.
- the result of the filtration was that 76% of the total starting curcuminoids were recovered in the permeate phase.
- the content in the final product was increased to values of 45%, which meant a 3-fold purification of the initial content without the need to use organic solvents other than ethanol.
- EXAMPLE 6 Extraction of 4 kg of cocoa powder with purified water.
- the solid was separated from the liquid by filtration and the resulting liquid was concentrated by evaporation to a dry residue greater than 75%.
- the concentrate was mixed with ethanol in a ratio of 1 to 10 times. After stirring the result was a precipitation of the sugars present in the solution. This solution was then filtered and the precipitate was discarded.
- the liquid was adjusted to a dry residue of 2% with ethanol and passed through nanofiltration membranes capable of working with organic solvents (Organic solvent nannofiltration membranes, OSN). Specifically, a 900 Da membrane was used in diafiltration mode.
- the result of the described process allows obtaining a cocoa extract with a high content of flavan-3-ols and a reduction in the content of alkaloids.
- EXAMPLE 7 Increase in flavan-3-ols content in a grape seed extract sample.
- Ultrapure water was used as solvent to extract the grape seeds.
- the solid was separated from the liquid by filtration and the resulting liquid was concentrated by evaporation to a dry residue greater than 75%.
- the concentrate was mixed with ethanol in a ratio of 1 to 10 times. After stirring the result was a precipitation of the sugars present in the solution. This solution was then filtered and the precipitate was discarded.
- the liquid was adjusted to a dry residue of 2% with ethanol and passed through nanofiltration membranes capable of working with organic solvents (Organic solvent nannofiltration membranes, OSN). Specifically, a 900 Da membrane was used in diafiltration mode.
- the result of this operation was an increase of more than three times in the content of flavan-3-ols of the extract.
- EXAMPLE 8 Increase in the content of flavan-3-ols and total polyphenols in a sample of pine bark extract.
- Ultrapure water was used as solvent to extract pine bark.
- the solid was separated from the liquid by filtration and the resulting liquid was concentrated by evaporation to a dry residue greater than 75%.
- the concentrate was mixed with ethanol in a ratio of 1 to 10 times. After stirring the result was a precipitation of the sugars present in the solution. This solution was then filtered and the precipitate was discarded.
- the liquid was adjusted to a dry residue of 2% with ethanol and passed through nanofiltration membranes capable of working with organic solvents (Organic solvent nannofiltration membranes, OSN). Specifically, a 900 Da membrane was used in diafiltration mode.
- EXAMPLE 9 Extraction of 10 kg of spinach selected to obtain a product with a high content of ecdysteroids.
- a micelle was obtained with a dry residue of about 3% and a total of 3 kg of dry matter.
- the ecdysteroid content in the product was 0.19% on the dry matter.
- Said micelle was subjected to a tangential filtration process using a filtration cartridge with a nanofiltration membrane (300 Da).
- the pH of the micelle was adjusted to a value between 3-5 by adding a mineral acid.
- the working pressure during the filtration process was between 4-30 bars.
- the result of the filtration was that 95% of the starting ecdysteroids were recovered in the concentrate phase compared to the 10% obtained in the permeate phase. This meant an effective purification of about 4 times the content of ecdysteroids.
- Example 10 Extraction 10 kg of lemon rind and with water at 50 C for 4 hours.
- the liquid was separated from the undissolved solid by centrifugation.
- the extract contained the compound of interest, eriocitrin, a flavonoid abundant in citrus.
- the micelle with a dry residue of 5% was subjected to a purification process by cascade tangential filtration. For them, 3 chained stages were carried out:
- the micelle was filtered through a 100,000 Da membrane, passing 99% of the eriocitrin to the permeate and obtaining a 3% dry residue.
- SUBSTITUTE SHEET (RULE 26) 2.
- the permeate from the first stage was filtered through a 10,000 Da membrane passing the compound of interest to the permeate at 99% and obtaining 1% solids.
- step 3 The permeate from step 2 was filtered through a 1,000 Da membrane passing 98% eriocitrin to the permeate and obtaining 0.5% solids.
- Example 11 Extraction 10 kg of lemon rind and with water at 50 C for 4 hours. The liquid was separated from the undissolved solid by centrifugation. The extract contained the compound of interest, eriocitrin.
- the micelle with a dry residue of 5% was subjected to a purification process by cascade tangential filtration. For them, 3 chained stages were carried out:
- the micelle was filtered through a 100,000 Da membrane, passing 99% of the eriocitrin to the permeate and obtaining a 3% dry residue.
- the permeate from the first stage was adjusted to a basic pH by adding an alkaline substance (sodium hydroxide) and the solution was filtered through a 10,000 Da membrane passing the compound of interest to the permeate by 99% .
- the pH caused a greater retention of solids with which a 0.5% solids was finally obtained in the permeate.
- step 3 The permeate from step 2 was filtered through a 1,000 Da membrane passing 98% eriocitrin to the permeate and obtaining 0.25% solids.
- SUBSTITUTE SHEET (RULE 26)
- Example 12 Extraction 10 kg of lemon rind with ultrapure water and 50 C for 4 hours.
- Sulfuric ashes are a parameter that measures the content of inorganic cations present in the product.
- Tap water in many cities usually contains high conductivity, even above 1000 pS.
- the use of tap water as extraction water reduces costs in the final product, but entails a series of drawbacks, among them the presence of inorganic ions that considerably increase the content of sulfuric ash (Ca 2+ , Na + , K + ), and may be outside the customer's specifications (around a maximum of 1%).
- Example 10 An extraction equivalent to Example 10 was carried out but with ultrapure water subjected to a double reverse osmosis process where it went from 980 pS to 100 pS in a first phase and less than 10 pS in a second phase. The extraction was carried out with a water with conductivity less than 10 pS. Once the purification was carried out as described in Example 10, it was dried using a spray-dryer, obtaining a solid extract. The sulfuric ashes were analyzed and an extract made with tap water and another with ultrapure water with a conductivity of less than 10 pS were compared. The results showed a decrease in the sulfuric ash content of 1.7% (out of the 1% admitted by most customers) to 0.1% of the product made with ultrapure water.
- Example 13 Extraction 10 kg of lemon rind with ultrapure water and 50 C for 4 hours.
- the lemon peel was extracted with ultrapure water, and the liquid was separated from the undissolved solid by centrifugation.
- the extract contained the compound of interest, eriocitrin, a flavonoid abundant in citrus.
- the micelle with a dry residue of 5% was subjected to a purification process by cascade tangential filtration. For them, 3 chained stages were carried out:
- SUBSTITUTE SHEET (RULE 26) 1.
- the micelle was filtered through a 100,000 Da membrane, passing 99% of the eriocitrin to the permeate and obtaining a 3% dry residue.
- the permeate from the first stage was filtered through a 10,000 Da membrane passing the compound of interest to the permeate at 99% and obtaining 1% solids.
- step 3 The permeate from step 2 was filtered through a 1,000 Da membrane passing 98% eriocitrin to the permeate and obtaining 0.5% solids.
- the liquid extract with 0.5% solids can be dried by spray dryer, but it is concentrated to 15% solids to improve drying performance. For this, a concentration stage is carried out using reverse osmosis membranes.
- Reverse osmosis allows the passage of water, but not the rest of the compounds in the extract, eg eriocitrin, or inorganic compounds such as sodium, potassium, or calcium salts, among others.
- the concentration of solutes increases and reaches a point where it is not possible to concentrate more (working pressure too high).
- the use of ultrapure water makes it possible to reach the objective of between 15-20% of dry matter through a final stage of concentration by osmosis.
- the use of tap water only allows reaching a concentration of between 2.5-7.5% dry matter due to the high content of inorganic salts.
- the use of ultrapure water would improve the performance in hours of drying, more than 60% with respect to running water.
- Example 14 Extraction 10 kg of lemon rind with ultrapure water at 50 C for 4 hours and
- the lemon peel was extracted with ultrapure water, and the liquid was separated from the undissolved solid by centrifugation.
- the extract contained the compound of interest, eriocitrin.
- the micelle with a dry residue of 5% was subjected to a purification process by cascade tangential filtration. For them, 3 chained stages were carried out:
- SUBSTITUTE SHEET (RULE 26) 1.
- the micelle was filtered through a 100,000 Da membrane, passing 99% of the eriocitrin to the permeate and obtaining a 3% dry residue.
- the permeate from the first stage was filtered through a 10,000 Da membrane passing the compound of interest to the permeate at 99% and obtaining 1% solids.
- step 3 The permeate from step 2 was filtered through a 1,000 Da membrane passing 98% eriocitrin to the permeate and obtaining 0.5% solids.
- Another parameter that is indicative of the purity of the extract obtained is the conductivity measurement, an indicator of the presence of dissolved ions in the water.
- the conductivity measurement There may be customer requirements that request to evaluate the content of salts or inorganic compounds, the measurement of conductivity in a solution of solids at 1% of the dry extract.
- the conductivity values were obtained between 2.0-2.5 mS versus 5.0-10.0 mS of an extract made with tap water.
- EXAMPLE 15 Extraction of 15 kg of fresh persimmon fruits with ultrapure water.
- the fresh persimmon fruit has a dry matter content of 15%, water and a high fiber content.
- SUBSTITUTE SHEET (RULE 26) After separation of the extracted solid and the liquid resulting from the extraction, 49 liters of extract (micelle) were obtained with a dry residue of 2.1%. This extract presents an amount of hydrolyzable tannins of 3.2% determined by HPLC and expressed as epicatechin. Said micelle was subjected to a tangential filtration process using a filtration cartridge with a 300 Da nanofiltration membrane. The result of the filtration was that 90% of the starting hydrolyzable tannins were recovered in the concentrate phase.
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KR1020227028737A KR20230004436A (ko) | 2020-04-15 | 2021-04-14 | 식물 추출물을 수득하기 위한 방법 |
JP2022551357A JP2023522556A (ja) | 2020-04-15 | 2021-04-14 | 植物抽出物を得る方法 |
AU2021256776A AU2021256776A1 (en) | 2020-04-15 | 2021-04-14 | Method for obtaining a botanical extract |
US17/907,373 US20230123084A1 (en) | 2020-04-15 | 2021-04-14 | Method for obtaining a botanical extract |
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CA3167344A CA3167344A1 (en) | 2020-04-15 | 2021-04-14 | Method for obtaining a botanical extract |
CN202180016914.5A CN115209907A (zh) | 2020-04-15 | 2021-04-14 | 用于获得植物提取物的方法 |
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US20230123084A1 (en) | 2023-04-20 |
KR20230004436A (ko) | 2023-01-06 |
CA3167344A1 (en) | 2021-10-21 |
CN115209907A (zh) | 2022-10-18 |
BR112022015477A2 (pt) | 2022-09-27 |
AU2021256776A1 (en) | 2022-09-01 |
JP2023522556A (ja) | 2023-05-31 |
EP3895720A1 (en) | 2021-10-20 |
EP3922257A1 (en) | 2021-12-15 |
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