Abstract: The invention has compositions of matter and process aspects.The compositions of matter aspect relate to two classes of new organic compounds, viz., A. intermediates which are sulfur-containing hydrocarbons covalently bonded to trialkoxysilane and B. that class of intermediates covalently bonded to silica, e.g., sand and silica gel.The process aspect comprises two processes, viz., (1) A process for making the two new classes of compounds A and B, and (2) the process of removing and concentrating certain ions, such as noble metal ions and other transition metal ions, from solutions thereof admixed with other ions which may be present in much higher concentrations by forming a complex of the desired ion(s) with a compound of class B, e.g., by flowing the solution through a chromatography column packed with the compound, breaking the complex, e.g.

Abstract: The process of the invention comprises removing and concentrating certain ions, such as the transition metal ions, from solutions thereof admixed with other ions which may be present in much higher concentrations by forming a complex of the desired ion(s) with a compound ##STR1## B and D are each a radical selected from the group of N(R.sup.3), N(R.sup.3)CH.sub.2, O, OCH.sub.2, S and SCH.sub.2, but B or D must be N(R.sup.3) or N(R.sup.3)CH.sub.2 ; E is a radical selected from the group consisting of H, NH(R.sup.3), SH, OH, lower alkyl, and Y and Z are radicals selected from the group of Cl, OCH.sub.3, OC.sub.2 H.sub.5, methyl, ethyl and halogenated substituents thereof, and O-matrix; R.sup.1 is a radical selected from the group consisting of H, SH, OH, lower alkyl and aryl such as phenyl, naphthyl and pyridyl; R.sup.2 is a radical selected from the group consisting of H or lower alkyl; R.sup.

Abstract: The invention has composition of matter and process aspects. The composition of matter aspect relates to the compounds selected from the class consisting of: ##STR1## in which Silica is sand or silica gel. The process aspect involves the use of any of these compounds packed in a column through which a solution of the multiple ions is flowed to complex with the compound and separate a desired selected ion from a multiple ion solution, breaking the complex by flowing a receiving liquid through the column to free the desired ion and recovering the freed desired ion from the receiving liquid.

Abstract: A process of recovering cesium ions from mixtures of ions containing them and other ions, e.g., a solution of nuclear waste materials, which comprises establishing a separate source phase containing such a mixture of ions, establishing a separate recipient phase, establishing a liquid membrane phase in interfacial contact with said source and recipient phases, said membrane phase containing a ligand, preferably a selected calixarene as depicted in the drawing, maintaining said interfacial contact for a period of time long enough to transport by said ligand a substantial portion of the cesium ion from the source phase to the recipient phase, and recovering the cesium ion from the recipient phase. The separation of the source and recipient phases may be by the membrane phase only, e.g., where these aqueous phases are emulsified as dispersed phases in a continuous membrane phase, or may include a physical barrier as well, e.g.