title: Dialkylmethyl-2-(N,N-diisobutyl)acetamidoammonium iodide as a ruthenium selective ligand from nitric acid medium.
abstract: A new class of quaternary ammonium iodide based ligands with 2-(N,N-diisobutyl)acetamide as an alkyl appendage have been designed, synthesized and tested for their ability to extract ruthenium selectively from nitric acid medium. The 2-(N,N-diisobutyl)acetamido ammonium iodide with two propyl and a methyl substituents showed best results for the recovery of ruthenium. The optimized concentration of the solvent was found to be 0.2M in 30% isodecyl alcohol/n-dodecane. The stoichiometry of the complex was ascertained by slope analysis method and was found to be 1:1 with respect to ligand L(+)I(-) and Ru(NO)(NO3)3. Ruthenium formed an adduct of structure LRu(NO)(NO3)3 I in the extraction medium. Iodide ion played an important role in the formation of the stable and extractable complex of ruthenium. No extraction was observed when iodide was replaced by nitrate anion in the ligand. The ligand also showed good selectivity for ruthenium in the presence of other metal ions commonly found in nitric acid solutions of nuclear waste.
authors: Bio-Organic Division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India.
authors: Shikha
authors: S
authors: Sharma
authors: Bio-Organic Division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India. Electronic address: ghsunil@barc.gov.in.
authors: Sunil K
authors: SK
authors: Ghosh
authors: Process Development Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India. Electronic address: jnsharma@barc.gov.in.
authors: Joti N
authors: JN
authors: Sharma
mesh_terms: D064751:Ammonium Compounds; D005998:Glycine / Q000031:analogs & derivatives* / Q000737:chemistry; D007700:Kinetics; D017942:Nitric Acid / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D064751:Ammonium Compounds; D000644:Quaternary Ammonium Compounds; D017942:Nitric Acid; D012428:Ruthenium; C582942:ammonium iodide; D005998:Glycine
keywords: Alkylammonium acetamides; Iodide ion; Ruthenium; Separation; Solvent extraction