Studies on salt hydrates for latent heat storge. VI. Preheating effect on crystallization of sodium acetate trihydrate from aqueous solution with a small amount of disodium hydrogenphosphate.
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概要
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With particular reference to the use of Na<SUB>2</SUB>HPO<SUB>4</SUB> as nucleation catalyst for crystallization of CH<SUB>3</SUB>CO<SUB>2</SUB>Na·3H<SUB>2</SUB>O, influences of preheating temperature and time were studied on the crystallization of CH<SUB>3</SUB>CO<SUB>2</SUB>Na·3H<SUB>2</SUB>O from three kinds of CH<SUB>3</SUB>CO<SUB>2</SUB>Na aqueous solutions, whose concentrations were 58.0, 60.3, and 62.8 wt%. In 60.3 wt% aqueous solution (CH<SUB>3</SUB>CO<SUB>2</SUB>Na·3H<SUB>2</SUB>O), the nucleation catalyst begins to get deactivated by preheating at 81 °C. The temperature at which the catalyst begins to get deactivated is slightly raised with increasing CH<SUB>3</SUB>CO<SUB>2</SUB>Na concentration of the solution. The results obtained are compared with those previously reported on the use of Na<SUB>4</SUB>P<SUB>2</SUB>O<SUB>7</SUB>·10H<SUB>2</SUB>O as nucleation catalyst, and are discussed on the basis of the crystalline adsorption model.
- 公益社団法人 日本化学会の論文
著者
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Wada Takahiro
Central Research Laboratories Matsushita Electric Industrial Co. Ltd.
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Matsuo Yoshihiro
Central Research Laboratory Matsushita Electric Industrial Co. Ltd.
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