Autor:	E. A. Mezhov, V. A. Kuchumov, V. V. Druzhenkov
Rok vydání:	2002
Předmět:	Aqueous solution Tertiary amine Extraction (chemistry) Inorganic chemistry Aqueous two-phase system chemistry.chemical_element Nitrogen chemistry.chemical_compound chemistry Nitric acid Physical and Theoretical Chemistry Solubility Nuclear chemistry Palladium
Zdroj:	Radiochemistry. 44:135-140
ISSN:	1066-3622
DOI:	10.1023/a:1019663027481
Popis:	Extractive power of high-molecular-weight amines and quarternary ammonium bases (QABs) of various structures in various aliphatic and aromatic diluents is studied with respect to recovery of palladium nitrate complexes from nitric acid solutions. The effects of pH of the aqueous phase, the contact time, and temperature on the extraction parameters were studied with selected (optimal) extractants (tri-n-octylamine and tricaprylmethylammonium nitrate) in benzene. The composition of extracted complexes was determined to be a monosolvate in the case of the QAB and a disolvate for the tertiary amine. Palladium is efficiently backwashed with concentrated HNO3 and aminoacetic acid at elevated temperature. The solubility of amines and QABs in aqueous solutions is briefly reviewed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5ff13bc2bc39a40df284469e2ad9b8c8 https://doi.org/10.1023/a:1019663027481 Zobrazit plný text záznamu Full text from SpringerLink