聚氧乙烯十二烷基醚-盐-水-液-固萃取体系

研究了聚氧乙烯十二烷基醚(PLE)水溶液在无机盐存在下的分相条件;讨论了偶氮氯膦(CPA)等螯合剂及U(Ⅵ)、La(Ⅲ)、Zr(Ⅳ)、Sc(Ⅲ)等金属离子的螯合物在PLE固相中的萃取行为。用控制酸度与加掩蔽剂的方法实现了U(Ⅵ)—La(Ⅲ)、U(Ⅶ)—Zr(Ⅳ)的定量萃取分离。     

聚乙二醇-偶氮胂Ⅲ萃取光度法测定锆的研究

研究了偶氮胂Ⅲ (ArsenazoⅢ )作萃取剂和显色剂 ,在聚乙二醇 (PEG) - (NH4) 2 SO4-ArsenazoⅢ体系中的非有机溶剂萃取光度法测定锆。将络合物从 0 2 5mol/LHCl水溶液中萃取到PEG相 ,其最大吸收波长位于660nm ,ε =1.90× 1 0 4 和 1.70× 1 0 4 。Zr 的线性范围为 0～ 3 0 μg/mL和 3 0～ 5 0 μg/mL ,锆与ArsenazoⅢ的配位比为 1∶2。方法用于镁锌合金及铝合金中锆的测定 ,获得满意结果。     

聚乙二醇—偶氮伸Ⅲ萃取光度法测定锆的研究

研究了偶氮胂Ⅲ (ArsenazoⅢ )作萃取剂和显色剂 ,在聚乙二醇 (PEG) - (NH4) 2 SO4-ArsenazoⅢ体系中的非有机溶剂萃取光度法测定锆。将络合物从 0 2 5mol/LHCl水溶液中萃取到PEG相 ,其最大吸收波长位于660nm ,ε =1 90× 1 0 4 和 1 70× 1 0 4 。Zr 的线性范围为 0～ 3 0 μg/mL和 3 0～ 5 0 μg/mL ,锆与ArsenazoⅢ的配位比为 1∶2。方法用于镁锌合金及铝合金中锆的测定 ,获得满意结果。     

偶氮胂Ⅰ双水相萃取分离钍、铀、镧、钒、钼的研究

研究了在聚乙醇-2000（PEG）-硫酸铵-偶氮胂Ⅰ体系中Th(Ⅳ），U（Ⅵ），La（Ⅲ），V（Ⅴ）的萃取行为。结果表明，在pH1.0-5.0溶液中，Th(Ⅳ）可被PEG相几乎完全萃取，Mo(Ⅵ）部分被萃取，而La(Ⅲ），U（Ⅵ），V（Ⅴ）则不被萃取，从而实现了Th(Ⅳ）与U（Ⅵ），La（Ⅲ），V（Ⅴ）混合离子间的定量分离。通过吸收光谱和络合比的测定，研究了PEG相中试剂对络合物的存在形态。     

选择性分光光度法测定铀(Ⅵ)

偶氮胂Ⅲ可与许多金属离子发生具有高灵敏度的显色反应。Savvin把这种性质用于测定铀,其中包括预先把铀(Ⅵ)还原到铀(Ⅳ)或者采用EDTA和二苯胍萃取-分光光度的方法。我们观察到在pH5.5左右,如果采用二乙撑三胺五乙酸(DTPA)作掩蔽剂时,偶氮胂Ⅲ与铀之间的显色反应为测定铀提供了一种有足够的灵敏度和选择性的方法。而DTPA对显色反应没有明显的抑制作用。本文报道了该法在一些岩石样品中的应用。     

聚乙烯吡咯烷酮─偶氮胂M非有机溶剂液─固萃取体系

聚乙烯吡咯烷酮（ＰＶＰ）水溶液在不同盐存在下可分成聚合物固相和盐水相。研究了分相条件和水溶性螫合剂及金属离子螫合物在该体系两相间的分配行为。用偶氮胂Ｍ作萃取剂，实现了错（Ⅳ）－钪（Ⅲ），铀（Ⅵ）－铁（Ⅲ），铁（Ⅲ）－钪（Ⅲ）的定量萃取分离，探讨了ＰＶＰ相的萃取机理。     

离子液体[Bmim]BF4-NaH2PO4-偶氮胂Ⅲ体系中La（Ⅲ）的存在形态及测定

建立了室温离子液体四氟硼酸1-丁基-3-甲基咪唑([Bmim]BF4)和NaH2PO4组成的双水相体系, 并用于对偶氮胂Ⅲ和La(Ⅲ)配合物萃取测定研究.考察了离子液体用量、溶液酸度、偶氮胂Ⅲ加入量、盐的浓度和加入其他物质对La(Ⅲ)配合物测定的影响.结果表明, 离子液在4.0 ml, 磷酸二氢钠加入量在2.0～3.0 g, 偶氮胂Ⅲ溶液1.0 ml, 溶液酸度在pH值为2～6范围, 偶氮胂Ⅲ和La(Ⅲ)配合物在离子液相中有较大的吸光度.除阳离子表面活性剂外, 其他离子表面活性剂和大多数无机离子不影响La(Ⅲ)的测定.吸收光谱、摩尔比、连续浓度变换、加入表面活性剂等实验表明, 在萃取相La(Ⅲ)与偶氮胂Ⅲ是以1∶3络阴离子形式存在的.利用离子液体双水相体系, 测定了样品中La(Ⅲ)的含量.     

用1,3,4-噻二唑-2-壬基巯基-5-硫醇萃取某些贱金属和贵金属

对于萃取分离贵金属的基本化学,已进行了一系列研究,本文即是其中之一。用1,3,4-噻二唑-2-壬基巯基-5-硫醇(TNSTH)作萃取剂,从浓盐酸溶液(约5M)中萃取分离金(Ⅲ)和钯(Ⅱ)的含氯阴离子颇有希望。在该介质中的分配系数约为10~4。TNSTH可用来使多种贵金属互相分离。例如,金(Ⅲ)-铑(Ⅲ)和钯(Ⅱ)-铑(Ⅲ)的混合溶液的分离因数(即分配系数之比)为10~6;金(Ⅲ)-钯(Ⅱ)为145;钯(Ⅱ)-铜(Ⅰ或Ⅱ)为180;钯(Ⅱ)-铂(Ⅳ)为10~6。钯(Ⅱ)的半萃取时间约为6分钟,能满足工业生产的要求。TNSTH不萃取除铜以外的贱金属,所以这种萃取剂为贵金属同贱金属的分离提供了一种手段。就铜而言,所萃取的是铜(Ⅰ)而不是铜(Ⅱ)。钯(Ⅱ)萃合物中的化学计量比为Pd:TNSTH等于1:1.5。关于乙醇溶液中TNSTH同各种含氯阴离子所形成的络合物的性质的补充资料表明,所形成的各种络合物是Cu(TNST)、Ag(TNST)、Pd(TNST)_2和RhCl_3(TNST)_2。大多数金属可用硫脲-盐酸溶液反萃取(值得注意的例外是铑(Ⅲ)和(Ⅳ))。萃取剂TNSTH可认为是一种具有供电子的氮原子和硫原子的螯合试剂。     

超基性岩中微量钛的测定

本文试验了在二氯化锡存在下,以甲苯萃取钛—N—苯甲酰—N—苯墓羟胺(BP-HA)—硫氰酸盐黄色三元络合物的萃取条件并拟定了超基性岩中微量钛的分析方法。试验表明,萃取的盐酸酸度必须保持6N以上,络合物至少能稳定6小时。Ca(Ⅱ)、Mg(Ⅱ)、Al(Ⅲ)、Mn(Ⅱ)、Zr(Ⅳ)等不干扰,V(V),Cr(Ⅵ)、Fe(Ⅲ)在二氯化锡在下，     

较大量铜铁镉锰镁铝铬钴镍存在下微量铀的萃取光度测定

国产胺型萃取剂N_(235)对U的萃取性能已有研究,本文作者亦报导了用丙铜作混溶剂,偶氮胂Ⅲ为显色剂,直接光度测定N_(235)-二甲苯中微量U.但当较大量的Cu、Fe、Cd、Mn、Al、Cr、Co、Ni存在下,利用N_(235)作萃取剂光度测定微量U,目前尚未见报导.本文研究了在硫酸介质中,用N_(235)-二甲苯萃取微量铀的条件,试验了近20种共存离子的干扰情况及消除方法,拟定了较大量Cu、Fe、Cd、Mn、Mg、Al、Cr、Co、Ni等金属离子存在下,微量U的测定方法.方法简单快速、易于掌握,结果满     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.