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二(2-乙基己基)膦酸萃取不同介質(zhì)中Pr^3+的研究
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TF804.2

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Study on Solvent Extraction of Pr3+ from Different Medium by Bis (2-Ethylhexyl) Phosphonic Acid in Heptane
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    摘要:

    研究了二(2-乙基己基)膦酸(PIA-8)的庚烷溶液分別在高氯酸鈉、氯乙酸、檸檬酸介質(zhì)中對(duì)pr^3+的萃取。探討了萃取平衡時(shí)間、不同介質(zhì)、PIA-8濃度對(duì)萃取Pr^3+的影響及反萃劑濃度對(duì)反萃率的影響;斜率法確定了萃合物的組成為Pr(HA2)3;測(cè)定了La^3+、Ce^3+、pr^3+、Nd^3+、Sm^3+、Eu^3+在不同介質(zhì)中的半萃取pH值,在高氯酸鈉介質(zhì)中分別為3.55、3.19、3.02、2.98、2.61、2.43:在氯乙酸介質(zhì)中分別為3.65、3.27、3.12、3.08、2.66、2.50;在檸檬酸介質(zhì)中分別為4.34、4.26、4.11、3.91、3.57、3.38。

    Abstract:

    The extraction of Pr3+was studied by using heptane containing bis(2-ethylhexyl)phosphinic acid in sodium perchlorate,chloroacetic acid and citric acid medium,respectively. The effects of extraction equilibrium time,different mediums,PIA-8 concentrations upon extraction Pr3+ and that of concentration of back extraction agent on back extraction rate of Pr3+ were discussed. The composition of the extracted compound was shown to be La(HA2)3.The pH1/2 values of La3+,Ce3+,Pr3+,Nd3+,Sm3+ and Eu3+ in different mediums were determined,it is 3.69,3.30,3.16,3.10,2.68 and 2.54 in sodium perchlorate medium respectively,3.65,3.27,3.12,3.08,2.66 and 2.50 in chloroacetic acid mediums,respectively,4.34,4.26,4.11,3.91,3.57 and 3.38 in citric acid mediums,respectively.

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余曉皎 姚秉華 永長(zhǎng)幸雄.二(2-乙基己基)膦酸萃取不同介質(zhì)中Pr^3+的研究[J].稀有金屬材料與工程,2007,36(6):1099~1101.[Yu Xiaojiao, Yao Binghua, Nagaosa Yukio. Study on Solvent Extraction of Pr3+ from Different Medium by Bis (2-Ethylhexyl) Phosphonic Acid in Heptane[J]. Rare Metal Materials and Engineering,2007,36(6):1099~1101.]
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