Abstract
The binary extraction is characterized by a number of properties being also typical for the coordinative extraction as well as by peculiarities in respect to the properties of union and cation exchanging extractants. Therefore it is suitable to consider it a new class of extraction processes. The extraction of acids, salts and metal hydroxides is described, examples are discussed, and extraction series are given. Due to the manifold possibilities of the variation of the binary extractant there are a number of variants to influence e. g. selectivity, and thus to control the processes of separation. The binary extraction thus leads to new efficient solutions of hydrometallurgical problems.
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