Recycling schemes from rare-earth-containing scraps have been developed rapidly due to the increasing supply risk for rare-earth elements (REEs). This article aimed to reduce the ecological impact and reagent costs for separating and recycling REEs from scraps, i.e., spent ceria-based polishing powders and lutetium-based crystal waste. A simultaneous process was proposed using an industrial extractant Cyanex^®572, which allowed efficient recycling of REEs from the wastes with less acid and alkali consumption than traditional hydrometallurgy process. Based on thermodynamic and kinetic analyses, common acid scrubbing was avoided by employing REEs scrubbing. Additionally, the alkali saponification, acid stripping and oxalic acid precipitation were substituted by one step of precipitation-stripping-saponification with ammonium fluoride which contained abundant F⁻ in the solution with weak acidity. F⁻ was easy to complex with REEs on the extractant as precipitate while NH₄⁺ bonded with anion of the extractant. Using this technique, the vast consumption of chemicals and million tons of wastewater in REEs industry may be avoided. Totally, the chemical consumption could be reduced over 80% and the wastewater was decreased more than 90%. REEs recovery yield also increased considerably using the novel process. Moreover, the ammonium fluoride was designed in containment system and was reused with no emission to the environment. This article provides a sustainable and efficient alternative process to REEs waste treatment industry.

由于稀土元素（REE）的供应风险增加，因此从含稀土的废料中回收利用的方案已得到迅速发展。本文旨在减少从废料（即废的基于二氧化铈的抛光粉和基于-的晶体废料）中分离和回收稀土元素的生态影响和试剂成本。使用工业萃取CYANEX提出了一种同时处理^®572，与传统的湿法冶金工艺相比，酸和碱消耗量少的废物中的稀土元素得以有效回收。根据热力学和动力学分析，通过使用REE洗涤可避免常规酸洗涤。此外，碱皂化，酸剥离和草酸沉淀通过沉淀剥离皂化的氟化铵中的一个步骤，该步骤包含丰富F取代^-与弱酸性溶液中。˚F ^-很容易复杂与萃取剂作为沉淀物而稀土元素NH ₄ ⁺与萃取剂的阴离子键合。使用这种技术，可以避免稀土工业中化学药品的大量消耗和数百万吨废水的消耗。总共可以减少80％以上的化学消耗，而废水减少90％以上。使用该新方法，REEs的回收率也大大提高。此外，氟化铵是在密闭系统中设计的，可在不向环境排放的情况下重复使用。本文为REEs废物处理行业提供了一种可持续，高效的替代方法。