SODIUM HYDROGEN CARBONATE PARTICLE AND METHOD FOR PRODUCING THE SAME

PROBLEM TO BE SOLVED: To provide a sodium hydrogen carbonate particle having an excellent flowability and a method for producing the same.SOLUTION: In the sodium hydrogen carbonate particle, a contour of an image projected from any direction is comprised in the area between a circumscribed circle of...

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Bibliographic Details
Main Authors SAKURAI MIKAKO, OKI TORU
Format Patent
LanguageEnglish
Published 28.08.2014
Subjects
CHEMISTRY
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM
HUMAN NECESSITIES
HYGIENE
INORGANIC CHEMISTRY
MEDICAL OR VETERINARY SCIENCE
METALLURGY
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS
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Summary:PROBLEM TO BE SOLVED: To provide a sodium hydrogen carbonate particle having an excellent flowability and a method for producing the same.SOLUTION: In the sodium hydrogen carbonate particle, a contour of an image projected from any direction is comprised in the area between a circumscribed circle of the projected image and a concentric circle whose radius length is 90% of that of the circumscribed circle. The method comprises a gas-liquid contact step in which an alkali aqueous solution of sodium salt is brought into contact with carbon dioxide. The alkali aqueous solution contains 0.01-0.025 mass% of at least one polymer compound selected from the group consisting of polyacrylic acid and its salt, and a polymer of acrylic acid and dicarboxylic acid and its salt, wherein the polyacrylic acid has an average molecular weight of 10000-1000000, and the polymer has an average molecular weight of 10000-1000000.
Bibliography:Application Number: JP20130028227