WO2012082587A2 - Highly soluble rebaudioside d - Google Patents

Highly soluble rebaudioside d Download PDF

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Publication number
WO2012082587A2
WO2012082587A2 PCT/US2011/064343 US2011064343W WO2012082587A2 WO 2012082587 A2 WO2012082587 A2 WO 2012082587A2 US 2011064343 W US2011064343 W US 2011064343W WO 2012082587 A2 WO2012082587 A2 WO 2012082587A2
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WO
WIPO (PCT)
Prior art keywords
rebaudioside
steviol glycoside
molasses
vol
blend
Prior art date
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PCT/US2011/064343
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French (fr)
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WO2012082587A3 (en
Inventor
Avetik Markosyan
Siddhartha Purkayastha
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Purecircle Usa
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Publication date
Priority to BR112013014589-7A priority Critical patent/BR112013014589B1/en
Priority to EP11849387.3A priority patent/EP2651960A4/en
Priority to MX2013006631A priority patent/MX346137B/en
Priority to US13/993,415 priority patent/US9029426B2/en
Application filed by Purecircle Usa filed Critical Purecircle Usa
Publication of WO2012082587A2 publication Critical patent/WO2012082587A2/en
Publication of WO2012082587A3 publication Critical patent/WO2012082587A3/en
Priority to US13/957,098 priority patent/US9510611B2/en
Priority to US14/677,538 priority patent/US9456626B2/en
Priority to US15/284,265 priority patent/US9901110B2/en
Priority to US15/369,400 priority patent/US10561164B2/en
Priority to US15/887,052 priority patent/US10492516B2/en
Priority to US15/905,414 priority patent/US10420359B2/en
Priority to US16/700,954 priority patent/US11439169B2/en
Priority to US16/793,813 priority patent/US20200253255A1/en

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    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L27/00Spices; Flavouring agents or condiments; Artificial sweetening agents; Table salts; Dietetic salt substitutes; Preparation or treatment thereof
    • A23L27/30Artificial sweetening agents
    • A23L27/33Artificial sweetening agents containing sugars or derivatives
    • A23L27/34Sugar alcohols
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L2/00Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/52Adding ingredients
    • A23L2/60Sweeteners
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24BMANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18Treatment of tobacco products or tobacco substitutes
    • A24B15/28Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/30Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
    • A24B15/36Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring
    • A24B15/40Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring having only oxygen or sulfur as hetero atoms
    • A24B15/403Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring having only oxygen or sulfur as hetero atoms having only oxygen as hetero atoms
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07HSUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H1/00Processes for the preparation of sugar derivatives
    • C07H1/06Separation; Purification
    • C07H1/08Separation; Purification from natural products
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07HSUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H15/00Compounds containing hydrocarbon or substituted hydrocarbon radicals directly attached to hetero atoms of saccharide radicals
    • C07H15/20Carbocyclic rings
    • C07H15/24Condensed ring systems having three or more rings
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L27/00Spices; Flavouring agents or condiments; Artificial sweetening agents; Table salts; Dietetic salt substitutes; Preparation or treatment thereof
    • A23L27/30Artificial sweetening agents
    • A23L27/33Artificial sweetening agents containing sugars or derivatives
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L27/00Spices; Flavouring agents or condiments; Artificial sweetening agents; Table salts; Dietetic salt substitutes; Preparation or treatment thereof
    • A23L27/30Artificial sweetening agents
    • A23L27/33Artificial sweetening agents containing sugars or derivatives
    • A23L27/36Terpene glycosides
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23VINDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00Food compositions, function of food ingredients or processes for food or foodstuffs
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24BMANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B13/00Tobacco for pipes, for cigars, e.g. cigar inserts, or for cigarettes; Chewing tobacco; Snuff
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/10General cosmetic use
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/06Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
    • A61K47/26Carbohydrates, e.g. sugar alcohols, amino sugars, nucleic acids, mono-, di- or oligo-saccharides; Derivatives thereof, e.g. polysorbates, sorbitan fatty acid esters or glycyrrhizin
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/60Sugars; Derivatives thereof
    • A61K8/602Glycosides, e.g. rutin
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q11/00Preparations for care of the teeth, of the oral cavity or of dentures; Dentifrices, e.g. toothpastes; Mouth rinses
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q19/00Preparations for care of the skin

Definitions

  • the invention relates to a process for producing highly soluble compositions containing purified steviol glycosides from Stevia rebaudiana Bertoni plant extract, more particularly Rebaudioside D.
  • High intensity sweeteners possess a sweetness level many times exceeding that of sucrose. They are essentially non-caloric and used widely in manufacturing of diet and reduced calorie food. Although natural caloric sweeteners such as sucrose, fructose, and glucose provide the most desirable taste to consumers, they possess high calorie values. High intensity sweeteners do not affect the blood glucose level and provide little or no nutritive value.
  • Stevia rebaudiana Bertoni is a perennial shrub of the Asteraceae (Compositae) family native to certain regions of South America.
  • the leaves of the plant contain from 10 to 20% of diterpene glycosides, which are around 150 to 450 times sweeter than sugar.
  • the leaves have been traditionally used for hundreds of years in Paraguay and Brazil to sweeten local teas and medicines. At present there are more than 230 Stevia species with significant sweetening properties.
  • the plant has been successfully grown under a wide range of conditions from its native subtropics to the cold northern latitudes.
  • the extract of Stevia rebaudiana plant contains a mixture of different sweet diterpene glycosides, which have a single base - steviol - and differ by the presence of carbohydrate residues at positions C13 and CI 9. These glycosides accumulate in Stevia leaves and compose approximately 10% - 20% of the total dry weight. Typically, on a dry weight basis, the four major glycosides found in the leaves of Stevia are Dulcoside A (0.3%), Rebaudioside C (0.6-1.0%), Rebaudioside A (3.8%) and Stevioside (9.1%). Other glycosides identified in Stevia extract include Rebaudioside B, C, D, E, and F, Steviolbioside and Rubusoside. Among steviol glycosides only Stevioside and Rebaudioside A are available on a commercial scale. Steviol glycosides have zero calories and can be used wherever sugar is used.
  • Rebaudioside D (CAS No: 63279-13-0), as shown in Fig. 1, is one of the sweet glycosides found in Stevia rebaudiana. Studies show that highly purified forms of Rebaudioside D possess a very desirable taste profile, almost lacking the bitterness and lingering licorice aftertaste typical for other Steviol glycosides. These properties multiply the significance of Rebaudioside D and attract great interest for methods of preparation of highly purified forms of Rebaudioside D. However, highly purified steviol glycosides possess relatively low water solubility.
  • Rebaudioside A thermodynamic equilibrium solubility at room temperature is only 0.8%.
  • Rebaudioside A exhibits so called polymorphism (Zell T.M., Padden B.E.. Grant D.J.W., Schroeder S.A., Wachholder K.L., Prakash I., Munsona E.J. (2000) Investigation of Polymorphism in Aspartame and Neotame Using Solid-State NMR Spectroscopy, Tetrahedron, 56, 6603-6616).
  • Rebaudioside A amorphous, anhydrous and solvate forms differ significantly from each other in terms of solubility, which is one of the main criteria for the commercial viability of a sweetener.
  • Rebaudioside A displays the lowest solubility (Prakash I., DuBois G.E., Clos J.F., Wilkens K.L., Fosdick L.E. (2008) Development of rebiana, a natural, non-caloric sweetener. Food Chem. Toxicol., 46, S75-S82). It was shown that Rebaudioside A may transform from one polymorph form to another at certain conditions (US Pat. Appl. 11/556,049).
  • Rebaudioside D possesses even lower water solubility compared to Rebaudioside A. In room temperature it can be dissolved only at 0.05%. When heat is applied, one can make up to 0.5% solution, but upon cooling to room temperature, Rebaudioside D will quickly crystallize back out from the solution. Considering high sweetness intensity of Rebaudioside D, even 0.05% solubility can be sufficient for many applications.
  • Rebaudioside D Many food production processes use highly concentrated ingredient mixes prior to producing final forms of food products. In that case, higher concentrations of dissolved Rebaudioside D will be required. It has to be noted that using the heat for dissolution of Rebaudioside D may not be possible in many compositions which contain heat sensitive components. Also maintaining high temperature of mixture for prolonged time to prevent premature crystallization of Rebaudioside D can cause thermal degradation of mixture components or undesirable changes of organoleptic properties.
  • the invention relates to a process for producing highly soluble compositions containing purified steviol glycosides from Stevia rebaudiana Bertoni plant extract, more particularly Rebaudioside D.
  • steviol glycoside(s) will mean Rebaudioside A, Rebaudioside B, Rebaudioside C, Rebaudioside D, Rebaudioside E, Rebaudioside F, Stevioside, Steviolbioside, Dulcoside A, Rubusoside, or other glycoside of steviol and combinations thereof.
  • solubility of material is determined in RO (reverse osmosis) water at room temperature. Where the solubility is expressed as "%" it to be understood as number of grams of material soluble in 100 grams of solvent.
  • highly purified will mean purity level of at least 95% (w/w) on anhydrous basis.
  • low purity will mean purity level of less than 95% (w/w) on anhydrous basis.
  • TSG content will mean Total Steviol Glycosides content, and it will be calculated as sum of all steviol glycosides' content including Rebaudioside A, Rebaudioside B, Rebaudioside C, Rebaudioside D, Rebaudioside E, Rebaudioside F, Stevioside, Steviolbioside, Dulcoside A and Rubusoside.
  • Reb A, B, C, D, E, F refer to Rebaudiosides A, B, C, D, E, F, respectively.
  • Reb D refers to Rebaudioside D (CAS No. 63279-13-0).
  • crystalline Rebaudioside D will refer to any form of highly purified Rebaudioside D obtained by crystallization from an aqueous or aqueous alcoholic solution containing Rebaudioside D and further separating the Rebaudioside D crystals and drying them by any means known to the art.
  • amorphous Rebaudioside D will refer to any form of highly purified Rebaudioside D obtained by spray drying or freeze drying of aqueous or aqueous alcoholic solution containing Rebaudioside D.
  • non-steviol glycoside fraction or “non-glycoside fraction” will mean materials predominantly comprising compounds, other than steviol glycosides, which are present in the water extracts of Stevia rebaudiana leaves or commercially available stevia extracts at more than 0.0001% (w/w) on dry basis.
  • Such compounds include typical plant materials, such as pigments and saccharides, phenolic compounds, volatile oil components, sterols, triterpenes, flavonoids, coumarins, non-glycosidic diterpenes (sterebins) spathulenol, decanoic acid, 8,11, 14-ecosatrienoic acid, 2-methyloctadecane, pentacosane, octacosane, stigmasterol, bsitosterol, a- and b- amyrine, lupeol, b-amyrin acetate, and pentacyclic triterpene or combinations thereof.
  • typical plant materials such as pigments and saccharides, phenolic compounds, volatile oil components, sterols, triterpenes, flavonoids, coumarins, non-glycosidic diterpenes (sterebins) spathulenol, decanoic acid, 8,11,
  • non-steviol glycoside fraction or “non-glycoside fraction” and prepared in some embodiments of present invention may also contain small residual amounts of steviol glycosides.
  • polyol refers to a compound that contains more than one hydroxyl group.
  • a polyol may contain 2 to 7 hydroxyl groups.
  • Non-limiting examples of polyols include erythritol, maltitol, mannitol, sorbitol, lactitol, xylitol, inositol, isomalt, propylene glycol, glycerol (glycerine), threitol, galactitol, reduced isomalto- oligosaccharides, reduced xylo-oligosaccharides, reduced gentio-oligosaccharides, reduced maltose syrup, reduced glucose syrup or combinations thereof.
  • molasses refers to sugarcane molasses such as first molasses, second molasses, US grade “A”, “B”, “C”, and substandard blackstrap molasses, as well as beet sugar molasses, boil-back molasses, high-test molasses, refiners' molasses, sweet sorghum syrup.
  • Non-limiting examples of typical constituents of molasses are sucrose, glucose, fructose, starch, gums, pentosans, hexitols, myoinositols, mannitol, aminoacids, wax, sterols, phosphatides, aconitic, citric, malic, oxalic, glycolic, succinic, fumaric acids, melanoidins or mixtures thereof.
  • carbamel refers to class I (INS No: 150a), Class II (INS No:
  • class III INS No: 150c
  • class IV INS No: 150d
  • crystalline Reb D was dissolved in a water ethanol mixture and spray dried to obtain amorphous form of Reb D with improved solubility.
  • crystalline or amorphous Reb D is combined with a polyol at a ratio of 1 : 100 to 100: 1 (w/w) to obtain a composition with improved RebD solubility.
  • the combination of crystalline Reb D and polyol at a ratio of 1 : 100 to 100: 1 (w/w) is dissolved in water or aqueous alcohol and spray dried to provide a composition with improved Reb D solubility.
  • the combination of amorphous Reb D and polyol at a ratio of 1 : 100 to 100: 1 (w/w) is granulated by means of roll compact granulator.
  • the granulated material made in accordance with the present invention advantageously yields a product with favorable characteristics such as Reb D solubility and particle size distribution.
  • steviol glycosides are separated from Stevia rebaudiana leaves' water extract to obtain the non-glycoside fraction of Stevia. Any separation technique known to the art, such as chromatographic separation, crystallization from water or aqueous alcohol, adsorption on specific resins, membrane separation, or supercritical fluid extraction may be employed.
  • amorphous or crystalline Reb D is combined with a non- glycoside fraction of stevia at a ratio of 1 : 100 to 100: 1 (w/w) to obtain a composition with improved RebD solubility.
  • the combination of crystalline Reb D and non- glycoside fraction of stevia at a ratio of 1 : 100 to 100: 1 (w/w) is dissolved in water or aqueous alcohol and spray dried to provide a composition with improved Reb D solubility.
  • amorphous or crystalline Reb D is combined with molasses or caramel at a ratio of 1 : 100 to 100: 1 (w/w) to obtain a composition with improved RebD solubility.
  • the combination of crystalline Reb D and molasses or caramel at a ratio of 1 : 100 to 100: 1 (w/w) is dissolved in water or aqueous alcohol and spray dried to provide a composition with improved Reb D solubility.
  • Fig. 1 shows the chemical structure of Rebaudioside D (CAS No: 63279-13-0). DETAILED DESCRIPTION OF THE INVENTION
  • the invention is aimed to provide Rebaudioside D forms or compositions containing Rebaudioside D with improved solubility in water.
  • highly purified crystalline Rebaudioside D which has a solubility of 0.05%, was dissolved in aqueous alcohol at a concentration of 0.5 to 50%, preferably 5-25%, more preferably 10-20%.
  • the alcohol content used in aqueous alcohol is 0.1-100% (vol/vol), preferably 20-70% (vol/vol), more preferably 30-50% (vol/vol).
  • the alcohol is selected from the group consisting of alkanols, more particularly methanol, ethanol, n-propanol, 2-propanol, 1-butanol, 2-butanol or combinations thereof
  • the solution is heated to 30-100°C, preferably 50-100°C, more preferably 60- 100°C.
  • the solution is maintained at 20-80°C, preferably 30-70°C, more preferably 50-60°C.
  • the solution is fed to a spray drier to obtain a powder of highly purified amorphous Reb D with a solubility of 0.2%.
  • highly purified amorphous or crystalline Rebaudioside D is combined with a polyol at a ratio of 1 : 1 to 1 : 100 (wt/wt), preferably 1 : 1 to 1 :30 (wt/wt), more preferably 1 : 1 to 1 : 10.
  • the polyol is selected from group consisting of erythritol, maltitol, mannitol, sorbitol, lactitol, xylitol, inositol, isomalt, propylene glycol, glycerol (glycerine), threitol, galactitol, reduced isomalto-oligosaccharides, reduced xylo- oligosaccharides, reduced gentio-oligosaccharides, reduced maltose syrup, reduced glucose syrup or combinations thereof.
  • the polyol is selected from group consisting of erythritol, maltitol, mannitol, sorbitol, lactitol, xylitol, inositol, and isomalt, and more preferably, erythritol, maltitol, sorbitol, and isomalt.
  • the solubility of Reb D is 0.1-2.0%.
  • the solubility under the same conditions is 0.3-2.0%.
  • the combination of amorphous Reb D and polyol at a ratio of 1 :1 to 1: 100 (w/w), preferably 1 : 1 to 1 :30 (w/w), more preferably 1 :1 to 1 :10, is granulated by means of any equipment known to art suitable for granulation of fine powder into granules, preferably by means of a roll compact granulator.
  • the roll speed was between about 5-20 rpm, preferably between about 7-10 rpm, and more preferably about 9 rpm.
  • the roll pressure was between about 20-80 bar, preferably between about 40- 50 bar, and more preferably about 45 bar.
  • the granulator rotors were rotating at a rate of between about 50-2000 rpm, preferably between about 100-200 rpm, and more preferably at about 150 rpm.
  • the granulators were equipped with screens which sizes were between about 0.5-6.0 mm, preferably between about 1-4 mm, and more preferably about 3.1 mm for the pre-granulator and about 1.6 mm for the fine granulator.
  • the solubility of Reb D is 0.1-2.5%.
  • the non-glycosidic fraction of stevia is combined with crystalline Rebaudioside D, at a ratio of 1: 1 to 1 : 100 (wt/wt), preferably 1 :2 to 1 :20 (wt/wt), more preferably 1 :3 to 1 :10.
  • the mixture is dissolved in aqueous alcohol at a concentration of 0.5 to 50%, preferably 5-25%, more preferably 10-20%.
  • the alcohol content in used aqueous alcohol is 0.1-100% (vol/vol), preferably 20-70% (vol/vol), more preferably 30-50% (vol/vol).
  • the alcohol is selected from the group consisting of alkanols, more particularly methanol, ethanol, n-propanol, 2-propanol, 1-butanol, and 2-butanol.
  • the solution is heated to 30-100°C, preferably 50-100°C, more preferably 60-100°C.
  • the solution is maintained at 20-80°C, preferably 30-70°C, more preferably 50-60°C.
  • the solution is fed to a spray drier to obtain a powder of highly soluble Reb D composition.
  • the solubility of Reb D is 0.3- 5.0%, or 0.1-2.5%.
  • molasses are combined with crystalline Rebaudioside D, at a ratio of 1 :1 to 1 :100 (w/w), preferably 1 :2 to 1:20 (w/w), more preferably 1 :3 to 1:10.
  • the mixture is dissolved in aqueous alcohol at a concentration of 0.5 to 50%, preferably 5- 25%, more preferably 10-20%.
  • the alcohol content in used aqueous alcohol is 0.1-100% (vol/vol), preferably 20-70% (vol/vol), more preferably 30-50% (vol/vol).
  • the alcohol is selected from the group consisting of alkanols, more particularly methanol, ethanol, n- propanol, 2-propanol, 1-butanol, 2-butanol.
  • the molasses are selected from the group comprising of US grade “A", “B” and “C” molasses as well as substandard molasses, preferably grade “A” molasses.
  • To dissolve the Reb D the solution is heated to 30-100°C, preferably 50-100°C, more preferably 60-100°C. To prevent premature crystallization the solution is maintained at 20-80°C, preferably 30-70°C, more preferably 50-60°C.
  • the solution is fed to a spray drier to obtain a powder of highly soluble Reb D composition.
  • the solubility of Reb D is 0.1- 3.5%.
  • caramel is combined with crystalline Rebaudioside D, at a ratio of 1 :1 to 1 : 100 (w/w), preferably 1 :2 to 1 :20 (w/w), more preferably 1 :3 to 1 :10.
  • the mixture is dissolved in aqueous alcohol at a concentration of 0.5 to 50%, preferably 5- 25%, more preferably 10-20%.
  • the alcohol content in used aqueous alcohol is 0.1-100% (vol/vol), preferably 20-70% (vol/vol), more preferably 30-50% (vol/vol).
  • the alcohol is selected from the group consisting of alkanols, more particularly methanol, ethanol, n- propanol, 2-propanol, 1-butanol, 2-butanol.
  • the caramel is selected from the group comprising of class I, class II, class III and class IV caramel colors, preferably, class I caramel.
  • To dissolve the Reb D the solution is heated to 30-100°C, preferably 50-100°C, more preferably 60-100°C. To prevent premature crystallization the solution is maintained at 20-80°C, preferably 30-70°C, more preferably 50-60°C.
  • the solution is fed to a spray drier to obtain a powder of highly soluble Reb D composition.
  • the solubility of Reb D is 0.3-3.5%.
  • EXAMPLE 1 Preparation of amorphous Rebaudioside D lOOg of crystalline Rebaudioside D, produced by PureCircle Sdn Bhd, with 98.1% purity (on anhydrous basis) was dissolved in 500 mL aqueous ethanol, containing 50% (vol.) ethanol. The solution was maintained at 50°C and dried using a YC-015 laboratory spray drier (Shanghai Pilotech Instrument & Equipment Co. Ltd., China) operating at 175°C inlet and 100°C outlet temperatures. The obtained amorphous powder was compared with crystalline material for solubility.
  • EXAMPLE 4 Preparation of Rebaudioside D soluble composition lOg of amorphous Rebaudioside D prepared according to EXAMPLE 1, was mixed with different amounts of erythritol (Prima Inter-Chem Sdn Bhd, Malaysia). The obtained blends were tested for solubility, and solution stability to crystallization, during storage at room temperature. Table 4
  • EXAMPLE 5 Preparation of Rebaudioside D soluble composition lOg of crystalline Rebaudioside D, produced by PureCircle Sdn Bhd, with 98.1% purity (on anhydrous basis) was mixed with different amounts of erythritol (Prima Inter- Chem Sdn Bhd, Malaysia). The obtained blends were dissolved in 5 volumes of aqueous ethanol, containing 50% (vol.) ethanol. The solution was maintained at 50°C and dried using a YC-015 laboratory spray drier (Shanghai Pilotech Instrument & Equipment Co. Ltd., China) operating at 175°C inlet and 100°C outlet temperatures. The obtained amorphous powder was tested for solubility, and solution stability to crystallization, during storage at room temperature.
  • EXAMPLE 7 Preparation of Rebaudioside D soluble composition lOg of amorphous Rebaudioside D, prepared according to EXAMPLE 1 , was mixed with different amounts of stevia non-glycosidic fraction, prepared according to EXAMPLE 2. The obtained blends were tested for solubility, and solution stability to crystallization, during storage at room temperature.
  • EXAMPLE 8 Preparation of Rebaudioside D soluble composition lOg of crystalline Rebaudioside D was mixed with different amounts of stevia non- glycosidic fraction, prepared according to EXAMPLE 2. The obtained blends were dissolved in 5 volumes of aqueous ethanol, containing 50% (vol.) ethanol. The solution was maintained at 50°C and dried using a YC-015 laboratory spray drier (Shanghai Pilotech Instrument & Equipment Co. Ltd., China) operating at 175°C inlet and 100°C outlet temperatures. The obtained amorphous powder was tested for solubility, and solution stability to crystallization, during storage at room temperature.
  • EXAMPLE 10 Preparation of granulated Rebaudioside D soluble composition lkg of amorphous Rebaudioside D prepared according to EXAMPLE 1, was mixed with different amounts of erythritol (Prima Inter-Chem Sdn Bhd, Malaysia). The obtained blends were transferred to an Alexanderwerk WP 50N/75 roller compactor. The compactor was operating at 9 rpm and 45 bar pressure. The compacted mass was fed to a pre-granulator and a fine granulator with rotors at rotating at 150 rpm. The screen size for the pre-granulator was 3.1 mm and for the fine granulator was 1.6 mm.

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Abstract

The invention relates to a process for producing highly soluble compositions containing purified steviol glycosides from Stevia rebaudiana Bertoni plant extract, more particularly Rebaudioside D. Obtained highly soluble compositions are useful as non- caloric sweeteners or in combination with sugar or high intensity sweeteners in edible and chewable compositions such as beverages, confectionaries, bakery products, chewing gums and the like.

Description

HIGHLY SOLUBLE REBAUDIOSIDE D
PRIOR APPLICATION INFORMATION
This application is entitled to the earlier filing dates of, and claims the benefit of priority to, U.S. Provisional Application No. 61/422,403, filed on December 13, 2010, and U.S. Provisional Application Number 61/424,798, filed on December 20, 2010, the contents of which are incorporated by reference herein in their entirety.
FIELD OF THE INVENTION
The invention relates to a process for producing highly soluble compositions containing purified steviol glycosides from Stevia rebaudiana Bertoni plant extract, more particularly Rebaudioside D.
BACKGROUND OF THE INVENTION
High intensity sweeteners possess a sweetness level many times exceeding that of sucrose. They are essentially non-caloric and used widely in manufacturing of diet and reduced calorie food. Although natural caloric sweeteners such as sucrose, fructose, and glucose provide the most desirable taste to consumers, they possess high calorie values. High intensity sweeteners do not affect the blood glucose level and provide little or no nutritive value.
Stevia rebaudiana Bertoni is a perennial shrub of the Asteraceae (Compositae) family native to certain regions of South America. The leaves of the plant contain from 10 to 20% of diterpene glycosides, which are around 150 to 450 times sweeter than sugar. The leaves have been traditionally used for hundreds of years in Paraguay and Brazil to sweeten local teas and medicines. At present there are more than 230 Stevia species with significant sweetening properties. The plant has been successfully grown under a wide range of conditions from its native subtropics to the cold northern latitudes. The extract of Stevia rebaudiana plant contains a mixture of different sweet diterpene glycosides, which have a single base - steviol - and differ by the presence of carbohydrate residues at positions C13 and CI 9. These glycosides accumulate in Stevia leaves and compose approximately 10% - 20% of the total dry weight. Typically, on a dry weight basis, the four major glycosides found in the leaves of Stevia are Dulcoside A (0.3%), Rebaudioside C (0.6-1.0%), Rebaudioside A (3.8%) and Stevioside (9.1%). Other glycosides identified in Stevia extract include Rebaudioside B, C, D, E, and F, Steviolbioside and Rubusoside. Among steviol glycosides only Stevioside and Rebaudioside A are available on a commercial scale. Steviol glycosides have zero calories and can be used wherever sugar is used.
They are ideal for diabetic and low calorie diets. In addition, the sweet steviol glycosides possess functional and sensory properties superior to those of many high potency or high intensity sweeteners. Rebaudioside D (CAS No: 63279-13-0), as shown in Fig. 1, is one of the sweet glycosides found in Stevia rebaudiana. Studies show that highly purified forms of Rebaudioside D possess a very desirable taste profile, almost lacking the bitterness and lingering licorice aftertaste typical for other Steviol glycosides. These properties multiply the significance of Rebaudioside D and attract great interest for methods of preparation of highly purified forms of Rebaudioside D. However, highly purified steviol glycosides possess relatively low water solubility. For example Rebaudioside A thermodynamic equilibrium solubility at room temperature is only 0.8%. On the other hand, it is well known that Rebaudioside A exhibits so called polymorphism (Zell T.M., Padden B.E.. Grant D.J.W., Schroeder S.A., Wachholder K.L., Prakash I., Munsona E.J. (2000) Investigation of Polymorphism in Aspartame and Neotame Using Solid-State NMR Spectroscopy, Tetrahedron, 56, 6603-6616). Rebaudioside A amorphous, anhydrous and solvate forms differ significantly from each other in terms of solubility, which is one of the main criteria for the commercial viability of a sweetener. In this regard, as shown in Table 1, the hydrate form of Rebaudioside A displays the lowest solubility (Prakash I., DuBois G.E., Clos J.F., Wilkens K.L., Fosdick L.E. (2008) Development of rebiana, a natural, non-caloric sweetener. Food Chem. Toxicol., 46, S75-S82). It was shown that Rebaudioside A may transform from one polymorph form to another at certain conditions (US Pat. Appl. 11/556,049).
Table 1
Properties of Rebaudioside A forms (US Pat. Appl. 11/556,049)
Figure imgf000005_0001
Rebaudioside D possesses even lower water solubility compared to Rebaudioside A. In room temperature it can be dissolved only at 0.05%. When heat is applied, one can make up to 0.5% solution, but upon cooling to room temperature, Rebaudioside D will quickly crystallize back out from the solution. Considering high sweetness intensity of Rebaudioside D, even 0.05% solubility can be sufficient for many applications.
Many food production processes use highly concentrated ingredient mixes prior to producing final forms of food products. In that case, higher concentrations of dissolved Rebaudioside D will be required. It has to be noted that using the heat for dissolution of Rebaudioside D may not be possible in many compositions which contain heat sensitive components. Also maintaining high temperature of mixture for prolonged time to prevent premature crystallization of Rebaudioside D can cause thermal degradation of mixture components or undesirable changes of organoleptic properties.
Therefore there is a need for developing highly soluble forms or compositions of Rebaudioside D which can provide stable solutions with minimal or no heat treatment.
Furthermore, considering the similar chemical structures of Rebaudioside D and other steviol glycosides, as well as other terpene glycosides, the developed approaches may be used in the case of other glycosides as well.
SUMMARY OF THE INVENTION
The invention relates to a process for producing highly soluble compositions containing purified steviol glycosides from Stevia rebaudiana Bertoni plant extract, more particularly Rebaudioside D.
Hereinafter the term "steviol glycoside(s)" will mean Rebaudioside A, Rebaudioside B, Rebaudioside C, Rebaudioside D, Rebaudioside E, Rebaudioside F, Stevioside, Steviolbioside, Dulcoside A, Rubusoside, or other glycoside of steviol and combinations thereof.
Hereinafter, unless specified otherwise the solubility of material is determined in RO (reverse osmosis) water at room temperature. Where the solubility is expressed as "%" it to be understood as number of grams of material soluble in 100 grams of solvent.
Hereinafter the term "highly purified" will mean purity level of at least 95% (w/w) on anhydrous basis. Hereinafter the term "low purity" will mean purity level of less than 95% (w/w) on anhydrous basis.
Hereinafter the term "TSG content" will mean Total Steviol Glycosides content, and it will be calculated as sum of all steviol glycosides' content including Rebaudioside A, Rebaudioside B, Rebaudioside C, Rebaudioside D, Rebaudioside E, Rebaudioside F, Stevioside, Steviolbioside, Dulcoside A and Rubusoside.
Hereinafter the terms "Reb A, B, C, D, E, F" refer to Rebaudiosides A, B, C, D, E, F, respectively.
Hereinafter the term "Reb D" refers to Rebaudioside D (CAS No. 63279-13-0).
Hereinafter the term "crystalline Rebaudioside D" will refer to any form of highly purified Rebaudioside D obtained by crystallization from an aqueous or aqueous alcoholic solution containing Rebaudioside D and further separating the Rebaudioside D crystals and drying them by any means known to the art.
Hereinafter the term "amorphous Rebaudioside D" will refer to any form of highly purified Rebaudioside D obtained by spray drying or freeze drying of aqueous or aqueous alcoholic solution containing Rebaudioside D.
Hereinafter the terms "non-steviol glycoside fraction" or "non-glycoside fraction" will mean materials predominantly comprising compounds, other than steviol glycosides, which are present in the water extracts of Stevia rebaudiana leaves or commercially available stevia extracts at more than 0.0001% (w/w) on dry basis. Not limiting examples of such compounds include typical plant materials, such as pigments and saccharides, phenolic compounds, volatile oil components, sterols, triterpenes, flavonoids, coumarins, non-glycosidic diterpenes (sterebins) spathulenol, decanoic acid, 8,11, 14-ecosatrienoic acid, 2-methyloctadecane, pentacosane, octacosane, stigmasterol, bsitosterol, a- and b- amyrine, lupeol, b-amyrin acetate, and pentacyclic triterpene or combinations thereof. The materials designated as "non-steviol glycoside fraction" or "non-glycoside fraction" and prepared in some embodiments of present invention may also contain small residual amounts of steviol glycosides. Hereinafter the term "polyol" refers to a compound that contains more than one hydroxyl group. A polyol may contain 2 to 7 hydroxyl groups. Non-limiting examples of polyols include erythritol, maltitol, mannitol, sorbitol, lactitol, xylitol, inositol, isomalt, propylene glycol, glycerol (glycerine), threitol, galactitol, reduced isomalto- oligosaccharides, reduced xylo-oligosaccharides, reduced gentio-oligosaccharides, reduced maltose syrup, reduced glucose syrup or combinations thereof.
Hereinafter the term "molasses" refers to sugarcane molasses such as first molasses, second molasses, US grade "A", "B", "C", and substandard blackstrap molasses, as well as beet sugar molasses, boil-back molasses, high-test molasses, refiners' molasses, sweet sorghum syrup. Non-limiting examples of typical constituents of molasses are sucrose, glucose, fructose, starch, gums, pentosans, hexitols, myoinositols, mannitol, aminoacids, wax, sterols, phosphatides, aconitic, citric, malic, oxalic, glycolic, succinic, fumaric acids, melanoidins or mixtures thereof. Hereinafter the term "caramel" refers to class I (INS No: 150a), Class II (INS No:
150b) class III (INS No: 150c), and class IV (INS No: 150d) caramel colors or mixtures thereof.
In one embodiment of the invention, crystalline Reb D was dissolved in a water ethanol mixture and spray dried to obtain amorphous form of Reb D with improved solubility.
In another embodiment, crystalline or amorphous Reb D is combined with a polyol at a ratio of 1 : 100 to 100: 1 (w/w) to obtain a composition with improved RebD solubility. In yet another embodiment, the combination of crystalline Reb D and polyol at a ratio of 1 : 100 to 100: 1 (w/w) is dissolved in water or aqueous alcohol and spray dried to provide a composition with improved Reb D solubility. In another embodiment, the combination of amorphous Reb D and polyol at a ratio of 1 : 100 to 100: 1 (w/w) is granulated by means of roll compact granulator. The granulated material made in accordance with the present invention advantageously yields a product with favorable characteristics such as Reb D solubility and particle size distribution.
In another embodiment, steviol glycosides are separated from Stevia rebaudiana leaves' water extract to obtain the non-glycoside fraction of Stevia. Any separation technique known to the art, such as chromatographic separation, crystallization from water or aqueous alcohol, adsorption on specific resins, membrane separation, or supercritical fluid extraction may be employed. In another embodiment, amorphous or crystalline Reb D is combined with a non- glycoside fraction of stevia at a ratio of 1 : 100 to 100: 1 (w/w) to obtain a composition with improved RebD solubility.
In yet another embodiment the combination of crystalline Reb D and non- glycoside fraction of stevia at a ratio of 1 : 100 to 100: 1 (w/w) is dissolved in water or aqueous alcohol and spray dried to provide a composition with improved Reb D solubility.
In another embodiment, amorphous or crystalline Reb D is combined with molasses or caramel at a ratio of 1 : 100 to 100: 1 (w/w) to obtain a composition with improved RebD solubility.
In yet another embodiment, the combination of crystalline Reb D and molasses or caramel at a ratio of 1 : 100 to 100: 1 (w/w) is dissolved in water or aqueous alcohol and spray dried to provide a composition with improved Reb D solubility. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
BRIEF DESCRIPTION OF THE DRAWING
Fig. 1 shows the chemical structure of Rebaudioside D (CAS No: 63279-13-0). DETAILED DESCRIPTION OF THE INVENTION
The invention is aimed to provide Rebaudioside D forms or compositions containing Rebaudioside D with improved solubility in water. In one embodiment, highly purified crystalline Rebaudioside D, which has a solubility of 0.05%, was dissolved in aqueous alcohol at a concentration of 0.5 to 50%, preferably 5-25%, more preferably 10-20%. The alcohol content used in aqueous alcohol is 0.1-100% (vol/vol), preferably 20-70% (vol/vol), more preferably 30-50% (vol/vol). The alcohol is selected from the group consisting of alkanols, more particularly methanol, ethanol, n-propanol, 2-propanol, 1-butanol, 2-butanol or combinations thereof To dissolve the Reb D, the solution is heated to 30-100°C, preferably 50-100°C, more preferably 60- 100°C. To prevent premature crystallization, the solution is maintained at 20-80°C, preferably 30-70°C, more preferably 50-60°C. The solution is fed to a spray drier to obtain a powder of highly purified amorphous Reb D with a solubility of 0.2%.
In another embodiment highly purified amorphous or crystalline Rebaudioside D is combined with a polyol at a ratio of 1 : 1 to 1 : 100 (wt/wt), preferably 1 : 1 to 1 :30 (wt/wt), more preferably 1 : 1 to 1 : 10. The polyol is selected from group consisting of erythritol, maltitol, mannitol, sorbitol, lactitol, xylitol, inositol, isomalt, propylene glycol, glycerol (glycerine), threitol, galactitol, reduced isomalto-oligosaccharides, reduced xylo- oligosaccharides, reduced gentio-oligosaccharides, reduced maltose syrup, reduced glucose syrup or combinations thereof. Preferably, the polyol is selected from group consisting of erythritol, maltitol, mannitol, sorbitol, lactitol, xylitol, inositol, and isomalt, and more preferably, erythritol, maltitol, sorbitol, and isomalt. When the prepared compositions containing crystalline Reb D are dissolved in water at room temperature the solubility of Reb D is 0.1-2.0%. For compositions with amorphous RebD the solubility under the same conditions is 0.3-2.0%.
In another embodiment, the combination of amorphous Reb D and polyol at a ratio of 1 :1 to 1: 100 (w/w), preferably 1 : 1 to 1 :30 (w/w), more preferably 1 :1 to 1 :10, is granulated by means of any equipment known to art suitable for granulation of fine powder into granules, preferably by means of a roll compact granulator. The roll speed was between about 5-20 rpm, preferably between about 7-10 rpm, and more preferably about 9 rpm. The roll pressure was between about 20-80 bar, preferably between about 40- 50 bar, and more preferably about 45 bar. The granulator rotors were rotating at a rate of between about 50-2000 rpm, preferably between about 100-200 rpm, and more preferably at about 150 rpm. The granulators were equipped with screens which sizes were between about 0.5-6.0 mm, preferably between about 1-4 mm, and more preferably about 3.1 mm for the pre-granulator and about 1.6 mm for the fine granulator. When the prepared compositions are dissolved in water, the solubility of Reb D is 0.1-2.5%.
In another embodiment, the non-glycosidic fraction of stevia is combined with crystalline Rebaudioside D, at a ratio of 1: 1 to 1 : 100 (wt/wt), preferably 1 :2 to 1 :20 (wt/wt), more preferably 1 :3 to 1 :10. The mixture is dissolved in aqueous alcohol at a concentration of 0.5 to 50%, preferably 5-25%, more preferably 10-20%. The alcohol content in used aqueous alcohol is 0.1-100% (vol/vol), preferably 20-70% (vol/vol), more preferably 30-50% (vol/vol). The alcohol is selected from the group consisting of alkanols, more particularly methanol, ethanol, n-propanol, 2-propanol, 1-butanol, and 2-butanol. To dissolve the Reb D, the solution is heated to 30-100°C, preferably 50-100°C, more preferably 60-100°C. To prevent premature crystallization, the solution is maintained at 20-80°C, preferably 30-70°C, more preferably 50-60°C. The solution is fed to a spray drier to obtain a powder of highly soluble Reb D composition. When the prepared compositions are dissolved in water at room temperature the solubility of Reb D is 0.3- 5.0%, or 0.1-2.5%.
In another embodiment, molasses are combined with crystalline Rebaudioside D, at a ratio of 1 :1 to 1 :100 (w/w), preferably 1 :2 to 1:20 (w/w), more preferably 1 :3 to 1:10. The mixture is dissolved in aqueous alcohol at a concentration of 0.5 to 50%, preferably 5- 25%, more preferably 10-20%. The alcohol content in used aqueous alcohol is 0.1-100% (vol/vol), preferably 20-70% (vol/vol), more preferably 30-50% (vol/vol). The alcohol is selected from the group consisting of alkanols, more particularly methanol, ethanol, n- propanol, 2-propanol, 1-butanol, 2-butanol. The molasses are selected from the group comprising of US grade "A", "B" and "C" molasses as well as substandard molasses, preferably grade "A" molasses. To dissolve the Reb D the solution is heated to 30-100°C, preferably 50-100°C, more preferably 60-100°C. To prevent premature crystallization the solution is maintained at 20-80°C, preferably 30-70°C, more preferably 50-60°C. The solution is fed to a spray drier to obtain a powder of highly soluble Reb D composition. When the prepared compositions are dissolved in water, the solubility of Reb D is 0.1- 3.5%.
In another embodiment, caramel is combined with crystalline Rebaudioside D, at a ratio of 1 :1 to 1 : 100 (w/w), preferably 1 :2 to 1 :20 (w/w), more preferably 1 :3 to 1 :10. The mixture is dissolved in aqueous alcohol at a concentration of 0.5 to 50%, preferably 5- 25%, more preferably 10-20%. The alcohol content in used aqueous alcohol is 0.1-100% (vol/vol), preferably 20-70% (vol/vol), more preferably 30-50% (vol/vol). The alcohol is selected from the group consisting of alkanols, more particularly methanol, ethanol, n- propanol, 2-propanol, 1-butanol, 2-butanol. The caramel is selected from the group comprising of class I, class II, class III and class IV caramel colors, preferably, class I caramel. To dissolve the Reb D the solution is heated to 30-100°C, preferably 50-100°C, more preferably 60-100°C. To prevent premature crystallization the solution is maintained at 20-80°C, preferably 30-70°C, more preferably 50-60°C. The solution is fed to a spray drier to obtain a powder of highly soluble Reb D composition. When the prepared compositions are dissolved in water, the solubility of Reb D is 0.3-3.5%. The following examples illustrate preferred embodiments of the invention. It will be understood that the invention is not limited to the materials, proportions, conditions and procedures set forth in the examples, which are only illustrative.
EXAMPLE 1 : Preparation of amorphous Rebaudioside D lOOg of crystalline Rebaudioside D, produced by PureCircle Sdn Bhd, with 98.1% purity (on anhydrous basis) was dissolved in 500 mL aqueous ethanol, containing 50% (vol.) ethanol. The solution was maintained at 50°C and dried using a YC-015 laboratory spray drier (Shanghai Pilotech Instrument & Equipment Co. Ltd., China) operating at 175°C inlet and 100°C outlet temperatures. The obtained amorphous powder was compared with crystalline material for solubility.
Table 2
Solubility of Rebaudioside D
Figure imgf000013_0001
*Solutions obtained at 50°C and 100°C crystallized after cooling down to room temperature (20°C).
EXAMPLE 2: Preparation of non-glycosidic stevia fraction
500g of commercial stevia extract, containing Rebaudioside A 41.2%, Stevioside 30.6%, Rebaudioside C 9.9%, Rebaudioside F 2.3%, Dulcoside A 0.5%, Rubusoside 0.6%, Rebaudioside D 1.5%, Steviolbioside 0.2% and Rebaudioside B 0.1% were dissolved in 9.5 liter of RO water and passed through a column packed with 10 liter Amberlite XAD7HP resin. The column was washed with 10 volumes of RO water. The collected water fractions were evaporated under vacuum at 55°C and spray dried to yield 45g powder with 9.8% TSG including 7.8% Rebaudioside D, 2.0% Rebaudioside A and non-detectable amounts of other steviol glycosides. EXAMPLE 3: Preparation of Rebaudioside D soluble composition lOg of crystalline Rebaudioside D, produced by PureCircle Sdn Bhd, with 98.1% purity (on anhydrous basis) was mixed with different amounts of erythritol (Prima Inter- Chem Sdn Bhd, Malaysia). The obtained blends were tested for solubility, and solution stability to crystallization, during storage at room temperature.
Table 3
Solubility of Rebaudioside D blends
Figure imgf000014_0001
* Solubility is calculated for RebD % content in solution
** The material was dissolved at 100°C and cooled down to room temperature (20°C). The reported concentrations are stable (do not crystallize) for 24hrs storage in room temperature.
EXAMPLE 4: Preparation of Rebaudioside D soluble composition lOg of amorphous Rebaudioside D prepared according to EXAMPLE 1, was mixed with different amounts of erythritol (Prima Inter-Chem Sdn Bhd, Malaysia). The obtained blends were tested for solubility, and solution stability to crystallization, during storage at room temperature. Table 4
Solubility of Rebaudioside D blends
Figure imgf000015_0001
* Solubility is calculated for RebD % content in solution
** The material was dissolved at 100°C and cooled down to room temperature (20°C). The reported concentrations are stable (do not crystallize) for 24hrs storage in room temperature.
EXAMPLE 5: Preparation of Rebaudioside D soluble composition lOg of crystalline Rebaudioside D, produced by PureCircle Sdn Bhd, with 98.1% purity (on anhydrous basis) was mixed with different amounts of erythritol (Prima Inter- Chem Sdn Bhd, Malaysia). The obtained blends were dissolved in 5 volumes of aqueous ethanol, containing 50% (vol.) ethanol. The solution was maintained at 50°C and dried using a YC-015 laboratory spray drier (Shanghai Pilotech Instrument & Equipment Co. Ltd., China) operating at 175°C inlet and 100°C outlet temperatures. The obtained amorphous powder was tested for solubility, and solution stability to crystallization, during storage at room temperature.
Table 5
Solubility of Rebaudioside D blends
Figure imgf000015_0002
* Solubility is calculated for RebD % content in solution
** The material was dissolved at 100°C and cooled down to room temperature (20°C). The reported concentrations are stable (do not crystallize) for 24hrs storage in room temperature. EXAMPLE 6: Preparation of Rebaudioside D soluble composition l Og of crystalline Rebaudioside D, produced by PureCircle Sdn Bhd, with 98.1 % purity (on anhydrous basis) was mixed with different amounts of stevia non-glycosidic fraction prepared according to EXAMPLE 2. The obtained blends were tested for solubility, and solution stability to crystallization, during storage at room temperature.
Table 6
Solubility of Rebaudioside D blends
Figure imgf000016_0001
* Solubility is calculated for RebD % content in solution
** The material was dissolved at 100°C and cooled down to room temperature (20°C). The reported concentrations are stable (do not crystallize) for 24hrs storage in room temperature.
EXAMPLE 7: Preparation of Rebaudioside D soluble composition lOg of amorphous Rebaudioside D, prepared according to EXAMPLE 1 , was mixed with different amounts of stevia non-glycosidic fraction, prepared according to EXAMPLE 2. The obtained blends were tested for solubility, and solution stability to crystallization, during storage at room temperature.
Table 7
Solubility of Rebaudioside D blends
Figure imgf000017_0001
* Solubility is calculated for RebD % content in solution
** The material was dissolved at 100°C and cooled down to room temperature (20°C). The reported concentrations are stable (do not crystallize) for 24hrs storage in room temperature.
EXAMPLE 8: Preparation of Rebaudioside D soluble composition lOg of crystalline Rebaudioside D was mixed with different amounts of stevia non- glycosidic fraction, prepared according to EXAMPLE 2. The obtained blends were dissolved in 5 volumes of aqueous ethanol, containing 50% (vol.) ethanol. The solution was maintained at 50°C and dried using a YC-015 laboratory spray drier (Shanghai Pilotech Instrument & Equipment Co. Ltd., China) operating at 175°C inlet and 100°C outlet temperatures. The obtained amorphous powder was tested for solubility, and solution stability to crystallization, during storage at room temperature.
Table 8
Solubility of Rebaudioside D blends
Figure imgf000017_0002
* Solubility is calculated for RebD % content in solution
** The material was dissolved at 100°C and cooled down to room temperature (20°C). The reported concentrations are stable (do not crystallize) for 24hrs storage in room temperature EXAMPLE 9: Preparation of Rebaudioside D soluble composition lOg of crystalline Rebaudioside D, produced by PureCircle Sdn Bhd, was mixed with different amounts of molasses (Chee Lam Trading, Malaysia). The obtained blends were dissolved in 5 volumes of aqueous ethanol, containing 50% (vol.) ethanol. The solution was maintained at 50°C and dried using a YC-015 laboratory spray drier (Shanghai Pilotech Instrument & Equipment Co. Ltd., China) operating at 175°C inlet and 100°C outlet temperatures. The obtained amorphous powder was tested for solubility, and solution stability to crystallization, during storage at room temperature.
Table 9
Solubility of Rebaudioside D blends
Figure imgf000018_0001
* Solubility is calculated for RebD % content in solution
** The material was dissolved at 100°C and cooled down to room temperature (20°C). The reported concentrations are stable (do not crystallize) for 24hrs storage in room temperature
EXAMPLE 10: Preparation of granulated Rebaudioside D soluble composition lkg of amorphous Rebaudioside D prepared according to EXAMPLE 1, was mixed with different amounts of erythritol (Prima Inter-Chem Sdn Bhd, Malaysia). The obtained blends were transferred to an Alexanderwerk WP 50N/75 roller compactor. The compactor was operating at 9 rpm and 45 bar pressure. The compacted mass was fed to a pre-granulator and a fine granulator with rotors at rotating at 150 rpm. The screen size for the pre-granulator was 3.1 mm and for the fine granulator was 1.6 mm. The "overs" (particles that are too large) and "fines" (particles that are too small) were separated by top screen having a screen size of US Mesh 10 and bottom screen of US Mesh 40. The % ratio of "overs":"product":"fines" was 0.9%:78.2%:20.9% respectively. The obtained products were tested for solubility, and solution stability to crystallization, during storage at room temperature.
Table 10
Solubility of Rebaudioside D blends
Figure imgf000019_0001
* Solubility is calculated for RebD % content in solution
** The material was dissolved at 100°C and cooled down to room temperature (20°C). The reported concentrations are stable (do not crystallize) for 24hrs storage in room temperature
While the foregoing has described one or more embodiments of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements or compositions thereof without departing from the true scope of the invention. Therefore, it is intended that this invention not be limited to a particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

CLAIMS:
1. A method of preparing a highly soluble steviol glycoside, comprising the steps of:
a. providing a highly purified steviol glycoside;
b. dissolving the highly purified steviol glycoside in a solvent selected from the group consisting of water or aqueous alcohol to make a solution;
c. drying the solution to obtain the highly soluble steviol glycoside.
2. The method of claim 1, wherein the steviol glycoside is selected from the group consisting of Rebaudioside A, Rebaudioside B, Rebaudioside C, Rebaudioside D, Rebaudioside E, Rebaudioside F, Stevioside, Dulcoside A, and combinations thereof.
3. The method of claim 1 wherein the highly purified steviol glycoside comprises Rebaudioside D.
4. The method of claim 1 wherein an alcohol content of the aqueous alcohol is about 0.1-100% (vol/vol), preferably about 20-70% (vol/vol), and more preferably about 30-50% (vol/vol), and a ratio of aqueous alcohol to dissolved steviol glycoside solids (vol/wt) is about 5: 1 to about 10: 1.
5. The method of claim 1 wherein drying is performed by a technique capable of yielding materials with amorphous polymorphic forms.
6. The method of claim 1, wherein the highly soluble steviol glycoside is in an amorphous powder form.
7. The method of claim 1, additionally comprising the step of blending the highly purified steviol glycoside with a polyol to form a blend, and the dissolving step (b) comprises dissolving the blend in the solvent.
8. The method of claim 7, wherein the highly purified steviol glycoside and the polyol are blended to achieve a ratio (wt/wt) of steviol glycoside to polyol of about 1 : 100 to about 100: 1, preferably about 1 : 1 to about 1 :30, and more preferably about 1 : 1 to about 1 : 10.
9. The method of claim 7, wherein the polyol is selected from the group consisting of erythritol, maltitol, mannitol, sorbitol, lactitol, xylitol, inositol, isomalt, propylene glycol, glycerol (glycerine), threitol, galactitol, reduced isomalto-oligosaccharides, reduced xylo- oligosaccharides, reduced gentio-oligosaccharides, reduced maltose syrup, reduced glucose syrup, and combinations thereof.
10. The method of claim 7, wherein the polyol comprises erythritol.
1 1. The method of claim 1, additionally comprising the step of blending the highly purified steviol glycoside with a non-glycosidic fraction of Stevia to form a blend, and the dissolving step (b) comprises dissolving the blend in the solvent.
12. The method of claim 1 1 wherein a ratio (wt/wt) of the non-glycosidic fraction of Stevia to the highly purified steviol glycoside is about 1 : 100 to about 100: 1, preferably about 1 :2 to about 1 :20, more preferably about 1 :3 to about 1 : 10.
13. The method of claim 1 1 wherein the non-glycosidic fraction of Stevia is prepared by a process comprising the steps of:
a. providing a stevia extract;
b. dissolving the stevia extract in water or aqueous alcohol to form a stevia extract solution;
c. passing the stevia extract solution through a chromatographic system packed with macroporous adsorbent resin capable of adsorbing steviol glycosides; d. collecting an effluent from the chromatographic system;
e. drying the effluent to obtain the non-glycosidic fraction of Stevia.
14. The method of claim 13, wherein the stevia extract contains about 10-95%, preferably about 30-90%, and more preferably about 40-85% total steviol glycosides.
15. The method of claim 13, wherein the water or aqueous alcohol ratio to dissolved stevia extract solids (vol/wt) is about 1 : 1 to about 200:1, preferably about 5: 1 to about 100: 1, more preferably about 10:1 to about 50:1.
16. The method of claim 13 wherein the amount of stevia extract exceeds an adsorption capacity of the adsorbent in the chromatographic system by about 1-10 times, preferably by about 1-5 times, and more preferably by about 1-1.5 times.
17. The method of claim 13, wherein the chromatographic system comprises about 1- 20 consecutively connected columns, preferably about 1-10 columns, and more preferably about 1-6 columns.
18. The method of claim 1, additionally comprising the step of blending the highly purified steviol glycoside with molasses to form a blend, and the dissolving step (b) comprises dissolving the blend in the solvent.
19. The method of claim 18, wherein a ratio (w/w) of molasses to steviol glycoside is about 1 :100 to about 100: 1, preferably about 1:2 to about 1 :20 and more preferably about 1:3 to about 1 :10.
20. The method of claim 18, wherein the molasses is selected from the group comprising sugarcane molasses such as first molasses, second molasses, US grade "A", "B", "C", and substandard blackstrap molasses; beet sugar molasses; boil-back molasses; high-test molasses; refiners' molasses; sweet sorghum syrup; and a combination thereof.
21. The method of claim 1, additionally comprising the step of blending the highly purified steviol glycoside with caramel to form a blend, and the dissolving step (b) comprises dissolving the blend in the solvent.
22. The method of claim 21, wherein a ratio (w/w) of caramel to steviol glycoside is about 1 : 100 to about 100: 1, preferably about 1 :2 to about 1 :20, and more preferably about 1 :3 to about 1 : 10.
23. The method of claim 21, wherein the caramel is selected from the group consisting of Class I (INS No: 150a), Class II (INS No: 150b), Class III (INS No: 150c), and Class IV (INS No: 150d) caramel colors and combinations thereof.
24. The method of claim 1, wherein the drying step comprises spray drying the solution in a spray drier operating at an inlet temperature of about 150-200°C and an outlet temperature of about 80-120°C.
25. The method of claim 6, further comprising blending the highly soluble amorphous steviol glycoside with a polyol to form a blend, and granulating the blend to prepare a highly soluble steviol glycoside composition.
26. A highly soluble steviol glycoside made by the method of claim 1.
27. A product comprising the highly soluble steviol glycoside of claim 26.
28. The product of claim 27, selected from the group consisting of a food product, a beverage product, a pharmaceutcal composition, a nutraceutical composition, a tobacco product, an oral hygiene composition and a cosmetic composition.
PCT/US2011/064343 2010-12-13 2011-12-12 Highly soluble rebaudioside d WO2012082587A2 (en)

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BR112013014589-7A BR112013014589B1 (en) 2010-12-13 2011-12-12 METHOD FOR PREPARING A HIGHLY SOLUBLE REBAUDIOSIDE COMPOSITION
EP11849387.3A EP2651960A4 (en) 2010-12-13 2011-12-12 Highly soluble rebaudioside d
MX2013006631A MX346137B (en) 2010-12-13 2011-12-12 Highly soluble rebaudioside d.
US13/993,415 US9029426B2 (en) 2010-12-13 2011-12-12 Highly soluble Rebaudioside D
US13/957,098 US9510611B2 (en) 2010-12-13 2013-08-01 Stevia composition to improve sweetness and flavor profile
US14/677,538 US9456626B2 (en) 2010-12-13 2015-04-02 Highly soluble rebaudioside D
US15/284,265 US9901110B2 (en) 2010-12-13 2016-10-03 Highly soluble Rebaudioside D
US15/369,400 US10561164B2 (en) 2010-12-13 2016-12-05 Stevia composition to improve sweetness and flavor profile
US15/887,052 US10492516B2 (en) 2010-12-13 2018-02-02 Food ingredients from Stevia rebaudiana
US15/905,414 US10420359B2 (en) 2010-12-13 2018-02-26 Highly soluble rebaudioside D
US16/700,954 US11439169B2 (en) 2010-12-13 2019-12-02 Food ingredients from Stevia rebaudiana
US16/793,813 US20200253255A1 (en) 2010-12-13 2020-02-18 Stevia composition to improve sweetness and flavor profile

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US13/957,098 Continuation-In-Part US9510611B2 (en) 2010-12-13 2013-08-01 Stevia composition to improve sweetness and flavor profile
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