Solvent Extraction and Separation of Palladium(II) from Hydrochloric Acid Medium with N-Benzothiazolylazo Butyl Imide
A new extractant,N-benzothiazolylazo Butyl Imide(BBI),was synthesized and identified by elemental analysis,infrared spectrum and nuclear magnetic resonance (NMR).The extraction of Pd(II) using BBI diluted with CHCl3 show high efficiency in 0-0.4M HCl medium.The dependence of the extraction percentages of Pd(II),Pt(IV)and base metal ions (Fe(III),Cu(II),and Zn(II)) on the HCl and BBI concentrations demonstrate that the idea condition for Pd(II) extraction is 0-0.4M HCl, 0.01-0.05M BBI.The stoichiometric ratio of Pd(II)-BBI complex is 1:2.The loading capacity of Pd(II) is about 0.5g/L using 0.1M BBI,which is comparable to that using DBSO.Complete stripping of Pd(II),Pt(IV) from loaded organic was proposed with 0.5M thiourea and 0.1M HCl.The Pd(II)-BBI-Cl complex has been characterized by elemental analysis,IR and 1HNMR spectra.
Jinglong Bu, Pengcheng Wang, Liqun Ai, Xiaoming Sang, Yungang Li
L. L. Chen et al., "Solvent Extraction and Separation of Palladium(II) from Hydrochloric Acid Medium with N-Benzothiazolylazo Butyl Imide", Advanced Materials Research, Vols. 287-290, pp. 1626-1631, 2011