用常温下呈固态的有机物质(如萘、石蜡等)加热熔成液态,与有机萃取剂组成均匀有机相,对水相中金属离子进行萃取,冷却后,有机相呈固态析出而与萃余水相分离。本文将这种萃取分离方法命名为固-液萃取分离。对固-液萃取分离研究,已有报导使用萘、二苯甲酮、联苯等做溶剂。本文提出的石蜡溶剂较之性能良好,以石蜡作溶剂的固-液萃取是有助于克服液-液萃取的某些缺陷 The organic phase is solidified with organic substance (such as naphthalene, paraffin and the like) heated at normal temperature and melted into a liquid state to form a uniform organic phase with the organic extractant, and the metal ions in the aqueous phase are extracted. After cooling, the organic phase is precipitated in solid state, Water phase separation. In this paper, this method of extraction and separation named solid-liquid extraction separation. Solid-liquid extraction separation studies have been reported using naphthalene, benzophenone, biphenyl, etc. as a solvent. The proposed paraffin solvent performs better than this. Solid-liquid extraction with paraffin as solvent helps to overcome some of the drawbacks of liquid-liquid extraction