POLYETHER COMPOUNDS

摘要

The present invention relates to a novel process for the extraction and removal of selected metal cations and of other predetermined constituents of various mixtures and especially to the selective removal of certain predetermined metal values from solutions containing these in admixture with other metal cations. The present invention also comprises a process for the selective extraction of certain anionic constituents. Furthermore, the present invention provides novel extracting agents which are characterised by their specificity for various cationic or anionic components of systems containing a mixture of constituents. The extractants to be used in the process of the present invention are based on the use of certain polyoxyalkenes, such as polythylene glycol(PEC) and polypropylene glycol (PPG), and of modifications, and functional derivatives of these, as defined hereinafter.