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SODIUM HYDROXIDE AQUEOUS SOLUTION REDUCED IN POTASSIUM CONTENT, SOLID-SHAPED SODIUM HYDROXIDE AND METHOD FOR PRODUCING THEM
SODIUM HYDROXIDE AQUEOUS SOLUTION REDUCED IN POTASSIUM CONTENT, SOLID-SHAPED SODIUM HYDROXIDE AND METHOD FOR PRODUCING THEM
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机译:钾含量降低的氢氧化钠水溶液,固体状氢氧化钠及其制备方法
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摘要
PROBLEM TO BE SOLVED: To provide a method for producing sodium hydroxide reduced in potassium content by which potassium being impurities can simply be removed from a sodium hydroxide aqueous solution of high concentration without taking a great deal of expense, and to provide the sodium hydroxide reduced in potassium content.;SOLUTION: The method for producing the sodium hydroxide aqueous solution reduced in potassium concentration comprises: a stage where a sodium hydroxide aqueous solution comprising potassium ions is prepared; a stage where the sodium hydroxide aqueous solution is admixed with the solid or aqueous solution of sodium tetraphenylborate so as to precipitate potassium tetraphenylborate; and a stage where the precipitated potassium tetraphenylborate is separated. Further, the solid-shaped sodium hydroxide is obtained by evaporating moisture in the sodium hydroxide aqueous solution with a reduced potassium content.;COPYRIGHT: (C)2011,JPO&INPIT
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