W-305C树脂吸附铌的性能及动力学研究

研究了W 305C离子交换树脂从草酸溶液中吸附铌草酸配合物的性能。试验结果表明,在[(NH4)C2O4]=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Freundish常数K=3 50×103,吸附率常数k25℃=1 70×10-4s-1,吸附活化能Ea=24 94kJ/mol,铌的饱和容量为每g干树脂143 2mg。     

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。     

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。     

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…     

氨基膦酸树脂对钇的吸附及机理

氨基膦酸树脂 (APAR)对钇 ( )的吸附在 p H=5 .0时最佳。静态饱和吸附容量为 14 3mg/ g树脂 ;用 2 .0～ 4 .0 m ol· L- 1 HCl作解吸剂 ,解析率为 90 % ;测得吸附速率常数 k2 98=1.81× 10 - 5s- 1 ;等温吸附服从 Fre-undlich经验式 ;吸附热力学函数△ H°=1.32 k J· m ol- 1 ;吸附机理表明 ,APAR功能基上的 N、 O与 Y3 发生配位键合。     

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。     

氨基膦酸树脂吸附铈的研究

研究了铈(Ⅲ)在氨基磷酸树脂上的吸附行为。试验结果在pH5.0时,静态饱和吸附容量为197mg/g干树脂;用2mol.L-1HCl洗脱,洗脱率为98.1%;表观速率常数k298=2.71×10-5s-1;等温吸附服从Freundlich经验式;吸附反应中的△Ho=50.0kJ.mol-1,△So=286J.mol-1.K-1,△Go=-35.1kJ.mol-1。树脂功能基与Ce3+的配比为2∶1;并用红外光谱探讨了树脂与铈的成键。     

D152树脂对镝的吸附及机制

对D152树脂吸附镝(Ⅲ)的过程及镝在D152树脂上的吸附行为进行了研究。研究了介质pH、温度、吸附时间、树脂量等因素对吸附过程的影响。实验结果表明:D152树脂对镝(Ⅲ)的吸附在pH=5.93的HAc-NaAc的缓冲溶液中为最佳。25℃时静态饱和吸附量为314.6mg.g-1(干树脂)。用1.0 mol.L-1的HCl溶液作为解吸剂,解吸率为96.2%;D152树脂对镝(Ⅲ)的表观吸附活化能Ea=18.28 kJ.mol-1,表观吸附速率常数k298=2.54×10-5s-1,k308=2.93×10-5s-1,k318=4.05×10-5s-1,测得热力学参数分别为ΔH=18.19 kJ.mol-1,ΔG=-0.88 kJ.mol-1,ΔS=63.99 J.mol-1.K-1,等温吸附服从Freundlich经验式。并用化学和红外光谱的方法探求树脂对镝(Ⅲ)的吸附机制。     

CL—P350萃淋树脂吸附铼和分离钼的性能研究

本文研究了CL-P_(350)萃淋树脂从硫酸溶液中提取铼和分离铜的性能。静态实验表明,不同酸液中DR_c值顺序是H(?)SO_4>HC1>HNO_3。在H_2SO_4浓度为3mol/L时,D_(Rc)=203.8mL/g,Dm_o=0.51mL/g;二者的分离系数B_(Rc)Mo有最大值399.6。D_(Rc)随温度升高而降低。动态实验表明,[Re]=0.372g/L的溶液和[Re]=0.372、[Mo]=0.96g/L的混合液分别流经柱床时,铼的动态饱和吸附容量均大于32mg/g,铼钼分离时铼的回收率接近90％.     

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.