NEAR NEUTRAL AQUEOUS CHITOSAN SOLUTION, ITS DRIED PRODUCT, AND METHOD OF PRODUCING THEM

PROBLEM TO BE SOLVED: To provide a chitosan solution stable at near neutral and its dried product, these are widely applicable to the fields of cosmetics, foodstuff and the like. SOLUTION: The stable aqueous chitosan solution containing chitosan solubilized with use of an inorganic or organic acid,...

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Bibliographische Detailangaben
Hauptverfasser:	ODANAKA SUSUMU, YAKO HIROSHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL RIPENING OF FRUIT OR VEGETABLES CHEMISTRY COMPOSITIONS BASED THEREON DAIRY PRODUCTS, e.g. MILK, BUTTER, CHEESE DERIVATIVES THEREOF FOODS OR FOODSTUFFS FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J HUMAN NECESSITIES HYGIENE MAKING THEREOF MEDICAL OR VETERINARY SCIENCE METALLURGY MILK OR CHEESE SUBSTITUTES ORGANIC MACROMOLECULAR COMPOUNDS POLYSACCHARIDES PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT,VEGETABLES, EDIBLE SEEDS SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS THE PRESERVED, RIPENED, OR CANNED PRODUCTS THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a chitosan solution stable at near neutral and its dried product, these are widely applicable to the fields of cosmetics, foodstuff and the like. SOLUTION: The stable aqueous chitosan solution containing chitosan solubilized with use of an inorganic or organic acid, has pH of neutral, preferably pH 6 to 7, without including any excess acid practically, and is processed to a dried product thereof. The chitosan solution is deacidified to the extent of giving no acidic stimulation to the skin. A method of producing the aqueous chitosan solution is characterized by that chitosan is dissolved in an acid, then the excess acid is removed giving the near neutral stable aqueous chitosan solution by controlling a water content of the chitosan solution, after removing the excess acid, so that concentration of the chitosan may keep a constant value providing pH of near neutral. After removal of the excess acid, and chitosan is treated with an adsorbent. The chitosan is dispersed in water and is dissolved by adding an inorganic or organic acid. The excess acid is removed by using a strong or weak basic anion exchange resin or chitosan derived from a natural product.