METHOD AND APPARATUS FOR PRODUCING HIGH PURITY ALKALI CARBONATE

PROBLEM TO BE SOLVED: To provide a method and an apparatus for producing a high purity alkali carbonate, by which the alkali carbonate containing extremely low content of metal impurities can be obtained. SOLUTION: Carbon dioxide gas containing high content of metal impurities is dissolved in any of...

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Bibliographic Details
Main Authors INOKO MASANORI, TSUCHIYA YASUSHI
Format Patent
LanguageEnglish
Published 27.07.2006
Subjects
CHEMISTRY
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM
INORGANIC CHEMISTRY
METALLURGY
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Summary:PROBLEM TO BE SOLVED: To provide a method and an apparatus for producing a high purity alkali carbonate, by which the alkali carbonate containing extremely low content of metal impurities can be obtained. SOLUTION: Carbon dioxide gas containing high content of metal impurities is dissolved in any of an acidic solution, a neutral solution, or an aqueous solution of an alkali hydrogen carbonate, and carbon dioxide gas which is generated from the solution and contains low content of metal impurities is obtained. Further, sodium carbonate, containing low content of metal impurities, is obtained by dissolving the obtained carbon dioxide gas into a high concentration alkali hydroxide aqueous solution, e.g. a sodium hydroxide aqueous solution. COPYRIGHT: (C)2006,JPO&NCIPI
Bibliography:Application Number: JP20050004109