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Process of removing ions from solutions by forming a complex with a sulfur containing hydrocarbon covalently bonded to silica
| Details |
Inventors: Bradshaw, Jerald S.; Tarbet, Byron J.; Krakowiak, Krzysztof E.; Biernat, Jan F.; Bruening, Ronald L.; Izatt, Reed M.;
Assignee: Brigham Young University (Provo, UT)
Primary Examiner: Cintins; Ivars
Assistant Examiner:
Attorney, Agent or Firm: Thorpe, North & Western
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., by flowing a receiving liquid through the column in much smaller amount than the amount of solution passed through it to remove and concentrate the desired ion(s) in solution in the receiving liquid and recovering the desired ion(s) from the receiving liquid. |
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DETAILED DESCRIPTION The compounds of the present invention comprise certain sulfur-containing hydrocarbon ligands covalently bonded to silica.
e.
g.
, sand or silica gel.
The compounds are identified above in Formula 2.
The process of the present invention uses the compounds, which are characterized by high selectivity for and removal of desired metal ions or groups of metal ions such as the noble metal ions present at low concentrations from the source phase containing a mixture of these metal ions with the ions one does not desire to remove present in much greater concentrations in the solution, in a separation device such as a column through which the solution is flowed.
The process of selectively removing and concentrating the desired ion(s) is characterized by the ability to quantitatively complex from a large volume of solution the desired ion(s) when they are present at low concentrations.
The said ions are recovered from the separation column by flowing through it a small volume of a receiving phase which contains a solubilized reagent which need not be selective, but which will strip the ions from the ligand quantitatively.
The recovery of the desired metal ions from the receiving phase is easily accomplished by well known procedures.
The process of producing the compounds of Formula 1 and Formula 2 are an important part of the present invention.
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Liquid Purification 
