Extraction of Re(VII) by neutral and basic extractants
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D. Schrötterová
und
P. Nekovář
Abstract
The mechanism of Re(VII) extraction from sulphate-containing solutions using primary amine Primene JMT, trioctylphosphine oxide (TOPO), tributyl phosphate (TBP), and their mixtures was investigated. It was found that the ratio of Re(VII) with Primene JMT and its sulphate in the organic phase was 1:1. The composition of Re(VII) complexes with TOPO depended on the acidity of solution ranging from about 1:1 to 2:1. When the extraction was carried out by TBP the mole ratio of TBP to Re was approximately 4. Primene JMT proved to be the most suitable agent for Re(VII) extraction with the exception of strongly acidic solutions, in which TOPO provided better results. The mixed solvents Primene JMT and TOPO as well as Primene JMT and TBP presented a slight synergism in weakly acidic solutions.
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© 2006 Institute of Chemistry, Slovak Academy of Sciences
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Artikel in diesem Heft
- Coupled membrane process applied to fruit juice concentration
- Residence time distribution study for the catalytic packing MULTIPAK®
- Prediction of gaseous emissions from industrial stacks using an artificial intelligence method
- Production of process water using integrated membrane processes
- Kinetics of pyrolysis and properties of carbon black from a scrap tire
- Extraction of Re(VII) by neutral and basic extractants
- Multiple steady states in a CSTR with total condenser: Comparison of equilibrium and nonequilibrium models
- Influence of biomass on hydrodynamics of an internal loop airlift reactor
- Modelling of enzymatic reaction in an internal loop airlift reactor
- Safety analysis and risk identification for a tubular reactor using the HAZOP methodology
- Soil adsorption defluoridation of drinking water for an Ethiopian rural community
- Isolation and identification of anthraquinones of Caloplaca cerina and Cassia tora
- Selection of carrier for immobilization of fructosyltransferase from Aureobasidium pullulans
