Molten solvent extraction behavior of palladium with 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone at 60 °C |
| |
Authors: | Bo Peng Xiaojun Guo Xuefen Mao Jinzhang Gao |
| |
Institution: | (1) College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, P. R. China |
| |
Abstract: | The solvent extraction behavior of precious metal palladium with 1-phenyl-3-methyl-4-benzoyl-5-pyrazone (PMBP) into molten
paraffin wax has been studied in the temperature range from 55 to 75 °C. The complex consisting of PMBP and palladium was
extracted into molten wax phase in the pH range from 1.0 to 3.5 at 60 °C. The extraction efficiency was up to 97% at the experimental
pH. The stoichiometry of the extracted species of palladium was determined on the basis of slope analysis method. The effects
of time to achieve equilibrium, temperature, and extractant concentration on the extraction were discussed. The thermodynamic
data indicate that the extraction is an endothermic reaction and the increase of temperature promotes the extraction of palladium
into molten paraffin wax and the extraction of palladium with PMBP is entropy controlled at high temperatures.
|
| |
Keywords: | Molten solvent extraction paraffin wax palladium 1-phenyl-3-methyl-4-benzoyl-5-pyrazone thermodynamic data |
本文献已被 SpringerLink 等数据库收录! |