707阴离子交换树脂吸附铌的性能及动力学研究

研究了707阴离子交换树脂从草酸溶液中吸附铌 草酸配合物的特性。试验结果表明,在[(NH4)2C2O4]=0 20mol/L,[K2S2O7]=0 030mol/L,[Nb]=8 0×10-5mol/L,pH=2 0条件下,铌的吸附率有最大值,测得Freundlish常数K=1 69×103,吸附速率常数k25℃=1 73×10-4s-1,吸附活化能Ea=22 1kJ/mol,树脂的饱和容量为每g干树脂123 2mg。     

W-305C树指吸附钽的性能及动力学研究

研究了 W 3 0 5 C树脂从草酸溶液中吸附钽草酸配合物的性能。结果表明 ,在 [(NH4) C2 O4]=0 .1 5 mol/L,[K2 S2 O7]=0 .0 2 8mol/ L,[Ta]=8.0× 1 0 -5mol/ L,p H=2 .0条件下 ,钽的吸附率有最大值 ,Freundlish常数k=3 .48× 1 0 3 ,吸附常数 K2 98=1 .72× 1 0 -4,吸附活化能 Ea=2 5 .70 k J/ mol,树脂对钽的饱和容量为每克干树脂 1 5 3 .5 2 mg。     

707阴离子交换树脂吸附钽的性能及动力学研究

本文研究了707阴离子交换树脂从草酸溶液中吸附钽草酸配合物的性能和动力学。试验结果表明在[（NH4）2C2O4]=0．13mol／L、[K2S2O8]=0．024mol／L、[Ta]=8×10－5mol／L、pH=1．5～3．5条件下，钽的吸附率有最大值。测得液膜扩散控制交换速率常数B25℃=2．5×10－4s－1，液膜扩散控制交换活化能Ea=15．96kJ／mol，钽的饱和吸附容量CTa=182．4mg／g干树脂。     

伯氨树脂对稀土矿酸浸出液中钍的吸附研究

合成了一种伯胺树脂,对钍具有很好的选择性,当钍浓度为125mg/L时,吸附钍的分配比达到2.48×103。与铁和铈的分离系数分别为1.29×104和9.7×104,吸附钍的最佳[SO42-]=1.0mol/L,[H+]=0.1mol/L,接触时间5min。对钍的去除率大于99%,处理液中钍浓度<0.001mg/L。     

IPN弱碱树脂吸附铼的行为及热力学性质

本文研究了IPN弱碱树脂从弱碱性介质中吸附铼的行为和热力学性质。实验结果表明,在PH=9.0—10.0范围内,该树脂能有效地吸附铼,而钼仅有少量被吸附,铼钼分离系数高达1506;树脂对铼的静态平衡交换容量和动态操作容量分别为804、805.3mg/g树脂;被吸附的铼用8％HN_3·H_2O+10％NH_4NO_3混合液淋洗,淋洗率为99.32％。树脂以阴离子交换机理吸附ReO_4~-。测定并求算了吸附过程的热力学函数。其值分别为ΔH~0=-9.62kJ/mol,ΔG~0=-10.00kJ/mol,ΔS~0=1.3J/mol·K。     

草酸-次甲基蓝极谱法测定有色金属矿石中微量锡

本文采用在硫酸介质中 ,用草酸沉淀分离锌、铜等多种重金属离子 ,二氯化钡分离铅以消除铅的影响。锡在草酸 -硫酸介质中呈草酸锡络合物状态 ,不易水解 ,不被吸附。络合物既可产生阴极波也可产生阳极波。体系中引入次甲基蓝后形成三元离子缔合物产生络合物吸附波 ,灵敏度增加 ,在 0 72mol/LH2 SO4- 0 2 5mol/L草酸 - 5 34×1 0 - 5mol/L次甲基蓝介质中其锡的峰电位为- 0 4V。采用阴极化Ip” ,E0 =- 0 0 8V ,在5 0mL溶液中Sn质量 0 5～ 1 0 0 μg成线性关系 ;用阳极化Ip″,E0 =- 0 2V ,在 5 0mL溶液中Sn质量 5～ 40 0 μg线性关…     

用强碱性阴离子交换树脂回收氰化物的研究

文中针对D2 - 1树脂和 2 0 1× 7树脂对氰化物的吸附和解吸性能进行了对比研究。研究主要集中在两种树脂的最佳吸附条件、饱和吸附量和吸附的热力学及动力学规律上 ,确定了两种树脂的最佳吸附条件均为 :pH值控制在 10～ 11之间 ,室温 ,静态吸附振荡 15min ;D2 - 1树脂和 2 0 1× 7树脂的静态饱和吸附量分别为 :15 .4 9mg/ml湿树脂 ,2 5 .39mg/ml湿树脂 ;吸附和解吸的速率常数 :D2 - 1树脂为 1.0 4× 10 - 2 s- 1和 1.4 8× 10 - 2 s- 1,2 0 1× 7树脂为 1.0 4× 10 - 2 s- 1和 2 .12× 10 - 2 s- 1,且吸附过程符合Freundlish经验等温式。同时 ,在研究解吸的过程中选择中性NaCl作为解吸剂 ,取得了良好的解吸效果。实验结果表明 ,2 0 1× 7树脂对氰化物的吸附性能优于D2 - 1树脂 ,在处理、回收提金废水中的氰化物方面更具有工业应用的前景。     

铋—檞皮素极谱络合吸附波测定锰盐中的痕量铋

在0.015至0.02mol/L H_2SO_4底液中,可获得灵敏的铋(Ⅲ)—檞皮素的络合吸附波.铋浓度由1.0×10~(-8)至6.0×10~(-6)mol/L与其二阶导数波有正比关系,检出限为5.0×10~(-9)mol/L.用其测定了试剂锰盐中10~(-4)的铋.测得电活性络合物组成为铋(Ⅲ):檞皮素=1:2,条件形成常数β=5.5×10~(-9).     

110~*树脂吸附铜的行为研究

研究了Cu2+在110*树脂上的吸附行为。结果表明:在pH=4.19的HAc-NaAc缓冲溶液中,110*树脂吸附Cu2+效果最佳,静态饱和吸附容量为240mg/g;用1.0~2.0mol/LHCl溶液洗脱,洗脱率达100%;表观速率常数k298=1.55×10-4s-1,表观活化能Ea=37.2kJ/mol;等温吸附服从Freundlich经验式;吸附热力学参数ΔH=14.8kJ/mol,ΔS=52.0J/(mol·K),ΔG=-0.7kJ/mol。用化学和红外光谱法确定了吸附机制为化学吸附。     

201×7树脂吸附回收提金尾液中的氰化物及金属铜

研究了201×7树脂吸附回收提金尾液中氰化物及金属铜的技术。通过对树脂的饱和吸附量、吸附速率及吸附等温线的研究,得到了201×7树脂对氰化物的饱和吸附量为44.39mg/ml湿树脂,铜的饱和吸附量为24.56mg/ml湿树脂;氰化物的吸附速率常数为k=9.30×10-4s-1,铜的吸附速率常数为k=1.39×10-3s-1;该树脂对氰化物及铜离子的吸附符合Freundlish方程;使用高浓度的NaCl溶液可以解吸树脂上负载的氰化物及金属铜,解吸率分别为85%和72%。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

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.