Cyanex272浸渍树脂萃取色层法分离铥、镱、镥

研究了不同温度、淋洗液酸度、稀土负载量、淋洗液流速及装柱树脂高度对Cyanex272浸渍树脂萃取色层法分离Tm, Yb, Lu的影响和柱参数. 结果表明, 在温度为30 ℃, 梯度淋洗酸度为0.5, 0.6, 1.5 mol·L-1, 稀土负载量为0.3%, 淋洗液流速为1.0 ml·cm-2·min-1,装柱树脂高度为480 mm(柱内径为16 mm)的条件下, 对Tm, Yb, Lu富集物分离效果较好.     

CL-P507-HCl体系萃取色层法分离铒、铥、镱

研究了用CL-P507-HCl体系萃取色层法分离铒、铥、镱,考察了树脂粒度、溶液温度、淋洗液酸度、树脂负载量、进样质量比等条件对分离效果的影响.结果表明,铥、镱之间存在着萃取抑制现象;以1.65 mol/L盐酸淋洗铒,1.90 mol/L盐酸淋洗铥和镱,在溶液温度50 ℃时可实现3者的分离;以99.9%氧化铥为原料,单柱一次分离可获得高纯铥溶液.     

CL-P204萃淋树脂分离稀土的研究

用萃淋树脂CL-P204作为萃取色层的固定相研究了淋洗液HCl酸度(1.5～1.9N),流速(0.65～1.05ml/cm~2·min),负载量(占饱和吸附量的0.65％、1.3％与1.95％)与柱长径比L/φ(17、37)对相邻稀土元素铽与镝分离的影响。用log D对log[H~+]作图得一组直线,其斜率～3。说明萃淋树脂上的P204萃取稀土时一个稀土离子置换三个氢离子。饱和吸附量法测得树脂上的P204与稀土形成的络合物的克分子比是3:1。其反应式可能是:Ln_(+3)+1.5(H_2A_2)=LnA_3+3H~+。     

氨基膦酸螯合树脂离子交换色层法分离重稀土的研究

采用离子交换色层法用氨基膦酸螯合树脂对重稀土铥、镱、镥富集物进行动态吸附和淋洗分离研究,考察了淋洗剂浓度、酸度、淋洗液流速、温度等因素对分离的影响。结果表明,在吸附柱中,以0.1mL/(cm2.min)的流速进料时能得到较大的吸附率;在淋洗液流速为0.3mL/(cm2.min)、温度30℃的条件下,用pH=8.0、浓度0.02mol/L的EDTA淋洗重稀土富集物,可实现铥、镱、镥三者的完全分离。     

萃取色层法分离铽镝研究

采用P₅₀₇萃淋树脂萃取色层法以Tb、Dy富集物作原料,研究了淋洗液酸度、柱径比、淋洗速度、稀土负载量以及原料中Tb、Dy含量对Tb、Dy分离的影响。并根据研究结果,选出较佳的分离工艺条件进行了多次综合条件试验,试验结果表明:一次分离可分别获得纯度>99.9 5%的髙纯Tb₄O₇和Dy₂O₃, 平均实收率分别为89.62%和87.63%。      

萃取色层法分离铽镝研究

采用Ｐ５０７萃淋树脂萃取色层法以Ｔｂ、Ｄｙ富集物作原料，研究了淋洗液酸度、柱径比、淋洗速度、稀土负载量以及原料中Ｔｂ、Ｄｙ含量对Ｔｂ、Ｄｙ分离的影响。并根据研究结果，选出较佳的分离工艺条件进行了多次综合条件试验，试验结果表明：一次分离可分别获得纯度〉９９．９５％的高纯Ｔｂ４Ｏ７和Ｄｙ２Ｏ３平均实收率分别为８９．６２％和８７．６３％。     

高纯氧化钆的分离

本文以填充萃取剂２－乙基己基膦酸单２－乙基己基酯的ＣＬ－Ｐ５０７萃淋树脂为萃取色层的固定相，研究了在盐酸介质中淋洗液酸度、稀土负载量对分离钆的影响。对萃取色层柱效率与液－液萃取理论级数进行了比较，优化了工艺条件，分离出纯度大于９９．９９９７％的Ｇｄ２Ｏ３。     

P507萃淋树脂提取高纯氧化镝的研究

以Ｐ５０７萃淋树脂为萃取色层的固定相、盐酸为流动相，在Φ×Ｌ＝１３ｍＭ×６４ｍｍ柱中，分别研究了洗液酸度、流速、稀土负载量和温度对稀土元素铽、镝、钬分离的影响，从而初步确定了从Ｔｂ－Ｄｙ－Ｈｏ混合料液中提取高纯镝的适宜工艺条件。     

LN树脂对溶液中钐和钆的静态吸附和色层柱分离研究

探究LN树脂对Sm(Ⅲ)和Gd(Ⅲ)的吸附效果,考察了时间、酸度和温度对树脂吸附量的影响,对吸附过程的吸附动力学和吸附热力学进行了研究,并测定了相关热力学参数?H、?S以及?G。结果表明,LN树脂在298 K下对Sm(Ⅲ)和Gd(Ⅲ)的吸附可在2 min后达到平衡,酸度越小平衡吸附量越大,且随温度升高平衡吸附量也逐渐升高。使用LN树脂色层柱进行了钐和钆的分离试验,Sm(Ⅲ)在0.75 mol/L HNO3酸度下洗脱,Gd(Ⅲ)在1.0 mol/L HNO3酸度下洗脱,不同洗脱液流速对柱分离效果的影响结果表明,流速为0.53 mL/min时分离效果最好。     

P507萃淋树脂色层法制备高纯Tb4O7的研究

研究了P507-HCL体系萃取色层法分离Gd、Tb、Dy的影响因素,在温度为50℃,流速为0.75L/min和负载量3.8 kg条件下,用0.45、0.55、0.8 mol/L的HCl溶液梯度淋洗,可分别将Gd、Tb、Dy彻底分离,且可制得4N以上高纯Tb4O7.     

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.