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不對(duì)稱亞砜BSO萃取鉑的性能及機(jī)理研究
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Study on Behaviour and Mechanism of Extraction of Platinum (Ⅳ) with Unsymmetrical Sulfoxide BSO
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    研究了不對(duì)稱亞砜BSO從鹽酸介質(zhì)中萃取鉑的性能和機(jī)理。結(jié)果表明：待萃液Pt(IV)濃度為1.000 g· L-1，HCl濃度為4 mol·L-1，用0.5 mol·L-1 BSO-煤油按相比1:1混合萃取Pt(IV)，經(jīng)過(guò)5 min的萃取振蕩，萃取率可達(dá)99.55%。亞砜BSO萃取Pt(IV)的反應(yīng)是放熱反應(yīng)，分配比隨溫度的升高而下降，反應(yīng)焓為–12.35 kJ·mol-1。通過(guò)斜率法、紫外-可見(jiàn)光譜和紅外光譜分析表明，在1~5 mol·L-1的HCl范圍內(nèi)，BSO萃取Pt(IV)的機(jī)理為酸性離子締合萃取

    Abstract:

    The behaviour and mechanism of extraction of platinum (IV) with unsymmetrical sulfoxide BSO from HCl media are studied. The results showed that the percentage extraction of Pt (IV) achieved 99.55% from 4 mol·L-1 HCl media with 0.5 mol·L-1 BSO-kerosene as an extractant. This was an exothermic reaction with an enthalpy of –12.35 kJ·mol-1. The structure of complex was discussed by slope analysis method, UV spectra, FT-IR spectra. The extraction mechanism under the above mentioned conditions could be determined to be an ion-pair formation with the protonated BSO, and the composition of complex may be [2(BSOH+)]·[PtCl62-]·[BSO·HCl]·[2BSO](0).

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陳柱慧.不對(duì)稱亞砜BSO萃取鉑的性能及機(jī)理研究[J].稀有金屬材料與工程,2009,38(6):1062~1065.[Chen Zhuhui. Study on Behaviour and Mechanism of Extraction of Platinum (Ⅳ) with Unsymmetrical Sulfoxide BSO[J]. Rare Metal Materials and Engineering,2009,38(6):1062~1065.]
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  • 收稿日期:2008-06-28
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