Studies of Inorganic Ion Exchangers. V. The Preparation of the Granulated Product from Titanium(IV) Bis(hydrogenphosphate) and Carbonaceous Materials, and Its Ion-exchange Properties
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概要
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In order to develop an inorganic ion exchanger for industrial use, a mixture of titanium(IV) bis (hydrogenphosphate), a carbonaceous material (sugar, flour, or sodium ligninsulfonate), and an additive (H<SUB>2</SUB>SO<SUB>4</SUB> or H<SUB>3</SUB>PO<SUB>4</SUB>) was sintered, and the resultant sintered product was crushed to obtain a granulated product, the ion-exchange property of which was then investigated. The mixing ratio of the titanium phosphate to the carbonaceous material has an influence on the ion-exchange capacity and the durability of the granulated product. In consideration of this influence, the weight ratio of the titanium phosphate to carbon included in the carbonaceous material was expediently chosen as 1 : 0.5. The acid additives promoted the carbonization of the carbonaceous material, whereby the sintered product of porosity was obtained. The weight ratio of the carbonaceous part to the titanium phosphate in the product decreased with an increase in the temperature within the range from 185 to 350 °C. In a batch method, a granulated product including Ti(HPO<SUB>4</SUB>)<SUB>2</SUB>·H<SUB>2</SUB>O adsorbed Na<SUP>+</SUP>, but not K<SUP>+</SUP>. A granulated product including Ti(HPO<SUB>4</SUB>)<SUB>2</SUB>·1/2H<SUB>2</SUB>O, however, adsorbed these ions, the equilibrium ion-exchange capacities toward Na<SUP>+</SUP> and K<SUP>+</SUP> being 1.28–1.78 and 1.56–2.34 meq/g respectively, and the selectivity quotient and the distribution coefficient toward K<SUP>+</SUP> showed larger values than those toward Na<SUP>+</SUP>. In a column method, when a NaCl (26.66 g/l)KCl (0.67 g/l) aqueous solution flowed into a column which had been packed with the granulated product (5 g) including the hemihydrate, the ion-exchange capacities of this granulated product toward Na<SUP>+</SUP> and K<SUP>+</SUP> were 1.1–1.2 and 0.38–0.58 meq/g, respectively, showing the separation factor (α<SUB>Na</SUB><SUP>K</SUP>) of 18–25. When artificial brackish water also flowed into the column, very small quantities of the Mg<SUP>2+</SUP> and Ca<SUP>2+</SUP> were adsorbed; consequently, a selective ion-exchange property of the granulated product toward K<SUP>+</SUP> was recognized. Also, the carbonaceous part in the granulated product adsorbed such coloring matter as Methylene Blue.
- 公益社団法人 日本化学会の論文
著者
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Kanayama Tadao
National Chemical Laboratory for Industry
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Kobayashi Etsuro
National Chemical Laboratory for Industry
関連論文
- Studies of Inorganic Ion Exchangers. V. The Preparation of the Granulated Product from Titanium(IV) Bis(hydrogenphosphate) and Carbonaceous Materials, and Its Ion-exchange Properties
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