Record Details

Direct in situ supercritical fluid extraction of neodymium ion from its oxide using thenoyl tri fluoro acetone–tri butyl phosphate–methanol in carbon dioxide

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Direct in situ supercritical fluid extraction of neodymium ion from its oxide using thenoyl tri fluoro acetone–tri butyl phosphate–methanol in carbon dioxide
 
Creator VINCENT, TESSY
MUKHOPADHYAY, MAMATA
WATTAL, PK
 
Subject acetone
carbon dioxide
carbon monoxide
complexation
dissolution
 
Description A novel process has been developed for the direct extraction of heavy metal ions from their oxides using ligand assisted supercritical carbon dioxide (SC CO2) without and with a cosolvent. A systematic investigation has been carried out to ascertain the mechanism of direct in situ supercritical fluid extraction, which involves three essential steps, namely ionisation, complexation and extraction. The present work involves direct extraction of metal ions from their oxides using neodymium (Nd) as candidate metal utilizing a synergy of thenoyl tri fluoroacetone (TTA) and tri butyl phosphate (TBP). The mechanism has been established by analysing the conversion of neodymium oxide to Nd3+ and metal complex. By the reaction with carbonic acid, the metal oxide is converted into metal cation. SC CO2 facilitates tautomerisation and dissolution of TTA required for the chelation. Addition of methanol to SC CO2 enhances the formation of metal complex which is being extracted in the SC fluid phase. Effects of process parameters have been evaluated on the performance of the process to ascertain the optimum conditions.
 
Publisher Elsevier
 
Date 2009-09-12T08:26:55Z
2011-11-25T15:20:37Z
2011-12-26T13:04:32Z
2011-12-27T05:50:24Z
2009-09-12T08:26:55Z
2011-11-25T15:20:37Z
2011-12-26T13:04:32Z
2011-12-27T05:50:24Z
2009
 
Type Article
 
Identifier The Journal of Supercritical Fluids 48(3), 230-237
0896-8446
http://dx.doi.org/10.1016/j.supflu.2008.10.022
http://hdl.handle.net/10054/1627
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1627
 
Language en