Development of fine-particle separation technique using interfacial phenomena in oil-water-solid three-phase system

对油水三相体系回收细小固体颗粒的一系列研究成果进行了总结。在《水解铝和铬离子对滑石亲油性的影响》一文中，讨论了体系Zeta电位与液-液萃取回收率的关系。颗粒表面的亲水性-亲油性转变与油滴、固体颗粒和金属氢氧化物沉淀物之间的互凝作用密切相关。在《金属阳离子在十二烷基硫酸盐液-液萃取超细二氧化硅中的作用》一文中，发现通过添加金属盐的活化与金属氢氧化物、络合物或沉淀物的形成有关。这些现象与金属残留物浓度的变化进行了比较，浓度降低的pH范围与获得高回收率的pH范围一致。…在《无机抑制剂在人造钻石和石墨上的吸附》一文中，我们考察了无机抑制剂对疏水微粒，特别是聚磷酸盐和硅酸盐的吸附行为，考察了溶液pH值和抑制剂浓度的影响。证实了这些物种在金刚石和石墨表面的吸附能介于化学吸附和物理吸附之间。在《金属离子对十六烷基三甲基氯化铵液-液萃取二氧化硅微粉的影响》中，证实了这些金属物种在二氧化硅萃取中起到了抑制作用。在发生抑制的pH范围内，在二氧化硅表面包覆金属氢氧化物沉淀物是可行的机理。在“8-羟基喹啉双液浮选细粒氧化物”中，研究了用8-羟基喹啉为络合剂的双液浮选中几种氧化物颗粒的回收，并讨论了油相pH值和捕收剂浓度的最佳条件。较少

The summaries obtained from a series of studies on the recovery of fine solid particles using oil-water-sold three-phase system are as follows.In "Effect of hydrolysed aluminum (III) and chromium (III) cations on the lipophilicity of talc," the relationship between the zeta potential and the liquid-liquid extraction recovery in the system was discussed. The hydrophile-lipophile transition of the particle surfaces was well concerned with the hetero-coagulation among oil droplets, solid particles, and metal-hydroxide precipitates.In "The Role of Hydrolyzed Metal Cations in the Liquid-Liquid Extraction of Ultrafine Silica with Dodecyl Sulfate," it was found that the activation through the addition of metal salts is correlated to the formation of the metal hydroxide, complex or precipitate. These phenomena were compared with the variation in residual concentration of metal species, the pH range where the concentration is reduced being in agreement with that where the high recovery is obtai … More ned.In "Adsorption of Inorganic Depressants on Synthesized Diamond and Graphite," the adsorption behaviors of the inorganic depressant for fine hydrophobic particles, in particular polyphosphate and silicate, were examined in terms of aqueous pH and depressant concentration. It was confirmed that the adsorption energy of these species in the diamond and graphite surfaces ranged between chemical and physical adsorption.In "Effect of Hydrolysed Metal Cations on the Liquid-Liquid Extraction of Silica Fines with Cetyltrimethylammonium Chloride," it was confirmed that the metal species act as a depressant in the silica extraction. The feasible mechanism of the above depression is the coating of metal hydroxide precipitates on the silica surfaces in the pH range where the depression takes place.In "Two-Liquid Flotation of Fine Oxide Particles with 8-Hydroxyquinoline," the recovery of several oxide particles in the two-liquid flotation using a chelating reagent of 8-hydroxyquinoline was investigated, and the optimum condition interms of pH and collector concentration in the oil phase was discussed. Less