可溶性塩類の浮選における界面活性剤濃度と臨界pHとの関係:可溶性塩類の浮選に関する研究 (第1報)

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The Flotation Method is known to be an important and interesting industrial process in the separation, recovery and refining of the mixture of several salts, and it should be more widely utilized. The above study was carried out by us as a fundamental experiment in order to explain the mechanism of"flotation"-the effect of pH in soluble salt flotation by observing the hydrophobic extent of soluble salt crystals-using a few surface active agents at soluble potassic salts. The results thus obtained were as follows:<BR>1) Potassic salts belong to the alkaline side in the case of the anionic surface active agents. But they are acidic and are apt to be hydrophobic easily in the case of"the cationic surface active agent."<BR>2) Potassic salts can be separated and recovered in the side which is more than pH 5 in the case of anionic surface. active agents of Na-lauryl sulfate or Na-dodecylbenzenesulfonate. But they are also apt to be separated and recovered in the side which is below pH 7 in the case of cationic surface active agents of laurylamine acetate or octadecylamine acetate.<BR>3) Our selective separation of the salt from the mixture of several salts in the flotation method was possible only under a certain condition.<BR>In conclusion, it.was proved by us in this case that the relation between the concentration of the surface active agent and critical pH in soluble salt flotation was an important factor.
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