Prospects for the use of crown esters and of calix[4]resorcins in the processes of isolation, concentration and separation of precious metals
Abstract
The review summarizes and analyzes current data from various literature sources on the processes of separation, concentration and separation of precious metals. The relevance and importance of the chain "production forecasting – processing process – price and sales" was noted. Different types of compounds and methods allowing to isolate, concentrate and separate noble metals from mixtures with the best results are considered. The advantages and disadvantages of the methods (deposition, SX, IX, MRT™) are shown. The advantages of molecular recognition (MRT™) systems, which allow the use of elements of "green chemistry" and "green engineering" in the process of separation, concentration and separation of precious metals, are noted.
Using examples of rhodium and platinum compounds with O-, N-, and P-containing crown esters and calix[4]resorcins in non-aqueous media, the results of our research on the yields of solid target products that can be used as the basis for the separation, concentration, and separation of precious metals are presented.
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