Separation of rare earth elements by liquid-liquid extraction using halogenated diluents or diluents of carboxylic acid type

摘要

The invention relates to a method of separation of rare earths by extraction liquid -. & / p & & p & according to this process is used as the extraction agent of an organic phase comprising an acid organophosphonic or phosphine and a diluent or halogen chosen from the group of the carboxylic acids.