The composition and structure of cyclic sulfoxide derivative Pd(IT) complexwere investigated. The coordinated number was studied with slope method. The coordination number is2 in lower acidity, but it is 3 in higher a...The composition and structure of cyclic sulfoxide derivative Pd(IT) complexwere investigated. The coordinated number was studied with slope method. The coordination number is2 in lower acidity, but it is 3 in higher acidity. Four methods, UV (ultraviolet) spectra, FUR(Fourier transform infrared) spectra, ~1H-NMR (nuclear magnetic resonance) spectra, and ^(13)C-NMRspectra, were used to determine the coordinated atom in complex. Pd is coordinated with O and S atomin S=O group in lower acidity media. The conversion of coordination bond appears with an increasingtime. Pd is coordinated with S atom in S=O group in higher acidity media, and inter-ligand-transferreaction occurs.展开更多
The extraction of gold （Ⅲ）, palladium （Ⅱ）, and platinum （Ⅳ） from the acidic media with the cyclic sulfoxide derivative of α-dodecyl-tetrahydrothiophene 1-oxide （dtmso） was investigated. Gold （Ⅲ）, pallad...The extraction of gold （Ⅲ）, palladium （Ⅱ）, and platinum （Ⅳ） from the acidic media with the cyclic sulfoxide derivative of α-dodecyl-tetrahydrothiophene 1-oxide （dtmso） was investigated. Gold （Ⅲ）, palladium （Ⅱ）, and platinum （Ⅳ） could be separated from the acidic media with suitable sulfoxide concentration and acidity. The extraction reaction of gold （Ⅲ）, palladium （Ⅱ） or platinum （Ⅳ） is exothermic when dtmso is used as an extracting reagent. The coordination number was studied by the slope method. The results indicate that, in high acidity, the dtmso coordination number for extracting gold （Ⅲ） or palladium （Ⅱ） is 3, and that for platinum （Ⅳ） is 2. UV and FT-IR spectra were used to analyze the structure of the complex. Gold （Ⅲ） is coordinated with the oxygen atom in S=O group in dtmso, and palladium （Ⅱ） or platinum （Ⅳ） is coordinated with the sulfur atom in S=O group in dtmso.展开更多
The extraction of palladium(Ⅱ) from acidic media with cyclic sulfoxidedervva-tive-α-octyl-tetrahydrothiophene-1-oxide (OTMSO) was investigated. The extraction efficiencyof palla-dium(Ⅱ) with OTMSO is 97.1% at 0.3 m...The extraction of palladium(Ⅱ) from acidic media with cyclic sulfoxidedervva-tive-α-octyl-tetrahydrothiophene-1-oxide (OTMSO) was investigated. The extraction efficiencyof palla-dium(Ⅱ) with OTMSO is 97.1% at 0.3 mol·L^(-1) OTMSO. The plots of the extractionefficiency for palla-dium(Ⅲ) appear to lie on a convex curve having a minimum of extractionefficiency at 1-2 mol·L^(-1) HCl. The extraction reaction of palladium(Ⅱ) with OTMSO isendothermic, and ΔH_(OTMSO)~θ = 12.2 kJ·mol^(-1). The coordination number was studied with slopemethod. The result indicates that coordination number is 2. FT-IR spectra were used to analyze thestructure of complex and coordinated atom in complex. Pd is coordinated with both oxygen and sulfuratom in S=O group in OTMSO. The situation and intensity of peaks contributed by complex preparedfrom various acidity were different. The recovery of palladium(Ⅱ) with OTMSO from scrap containingpalladium was discussed. After silver and bismuth were removed, the feed solution was extractedthree times by 40% (volume fraction) OTMSO-kerosene. The loaded organic phase was scrubbed threetimes, and stripped three times by 2 mol·L^(-1) NH_3·H_2O solution. The total recovery ofpalladium was 99.8%, and the purity of palladium was 99.8 %.展开更多
文摘The composition and structure of cyclic sulfoxide derivative Pd(IT) complexwere investigated. The coordinated number was studied with slope method. The coordination number is2 in lower acidity, but it is 3 in higher acidity. Four methods, UV (ultraviolet) spectra, FUR(Fourier transform infrared) spectra, ~1H-NMR (nuclear magnetic resonance) spectra, and ^(13)C-NMRspectra, were used to determine the coordinated atom in complex. Pd is coordinated with O and S atomin S=O group in lower acidity media. The conversion of coordination bond appears with an increasingtime. Pd is coordinated with S atom in S=O group in higher acidity media, and inter-ligand-transferreaction occurs.
文摘The extraction of gold （Ⅲ）, palladium （Ⅱ）, and platinum （Ⅳ） from the acidic media with the cyclic sulfoxide derivative of α-dodecyl-tetrahydrothiophene 1-oxide （dtmso） was investigated. Gold （Ⅲ）, palladium （Ⅱ）, and platinum （Ⅳ） could be separated from the acidic media with suitable sulfoxide concentration and acidity. The extraction reaction of gold （Ⅲ）, palladium （Ⅱ） or platinum （Ⅳ） is exothermic when dtmso is used as an extracting reagent. The coordination number was studied by the slope method. The results indicate that, in high acidity, the dtmso coordination number for extracting gold （Ⅲ） or palladium （Ⅱ） is 3, and that for platinum （Ⅳ） is 2. UV and FT-IR spectra were used to analyze the structure of the complex. Gold （Ⅲ） is coordinated with the oxygen atom in S=O group in dtmso, and palladium （Ⅱ） or platinum （Ⅳ） is coordinated with the sulfur atom in S=O group in dtmso.
文摘The extraction of palladium(Ⅱ) from acidic media with cyclic sulfoxidedervva-tive-α-octyl-tetrahydrothiophene-1-oxide (OTMSO) was investigated. The extraction efficiencyof palla-dium(Ⅱ) with OTMSO is 97.1% at 0.3 mol·L^(-1) OTMSO. The plots of the extractionefficiency for palla-dium(Ⅲ) appear to lie on a convex curve having a minimum of extractionefficiency at 1-2 mol·L^(-1) HCl. The extraction reaction of palladium(Ⅱ) with OTMSO isendothermic, and ΔH_(OTMSO)~θ = 12.2 kJ·mol^(-1). The coordination number was studied with slopemethod. The result indicates that coordination number is 2. FT-IR spectra were used to analyze thestructure of complex and coordinated atom in complex. Pd is coordinated with both oxygen and sulfuratom in S=O group in OTMSO. The situation and intensity of peaks contributed by complex preparedfrom various acidity were different. The recovery of palladium(Ⅱ) with OTMSO from scrap containingpalladium was discussed. After silver and bismuth were removed, the feed solution was extractedthree times by 40% (volume fraction) OTMSO-kerosene. The loaded organic phase was scrubbed threetimes, and stripped three times by 2 mol·L^(-1) NH_3·H_2O solution. The total recovery ofpalladium was 99.8%, and the purity of palladium was 99.8 %.
