110~*树脂对铒(Ⅲ)的吸附及其机理

研究介质pH、温度、吸附时间、树脂量等因素对110*树脂吸附稀土金属铒离子的影响及吸附行为与机理。结果表明,110*树脂对铒(Ⅲ)的吸附在pH=5.70时最佳,静态饱和吸附容量为317mg.g-1(干树脂),用1.0~2.0mol/L的HCl作解吸剂可定量解吸。吸附过程服从Freundlich经验式,b值在2~10之间。吸附反应热力学函数ΔH=16.5kJ.mol-1,ΔS=58.7J.mol-1.K-1,ΔG=-1.00kJ.mol-1。表观吸附活化能Ea=31.3 kJ.mol-1,表观吸附速率常数k298=1.84×10-5s-1。树脂上C-OH中的H和C=O中的O与Er3+发生配位。     

D201树脂吸附钒(V)的过程

研究D201树脂吸附钒(V)的过程。结果表明,pH值对D201树脂吸附钒的影响很大,与钒在溶液中的赋存状态有关。测得吸附热力学参数ΔH=8.11kJ.mol-1,ΔS=34.63 J.mol-1.K-1,ΔG298=-2.21 kJ.mol-1。动力学研究表明吸附交换速率主要受液膜扩散控制,等温吸附遵循Freund lich和Langmu ir曲线。     

11O*树脂对铒(Ⅲ)的吸附及其机理

研究介质pH、温度、吸附时间、树脂量等因素对110*树脂吸附稀土金属铒离子的影响及吸附行为与机理.结果表明,110*树脂对铒(Ⅲ)的吸附在pH=5.70时最佳,静态饱和吸附容量为317mg·g-1(干树脂),用1.0～2.0mol/L的HCl作解吸剂可定量解吸.吸附过程服从Freundlich经验式,b值在2～10之间.吸附反应热力学函数△H=16.5kJ·mol-1,△S=58.7J·mol-1·K-1,△G=-1.00kJ·mol-1.表观吸附活化能Ea=31.3 kJ·mol-1,表观吸附速率常数k298=1.84×10-5s-1.树脂上C-OH中的H和C=O中的O与Er3+发生配位.     

D201×4树脂吸附钼(Ⅵ)的性能及机理

在pH=3.7的HAc-NaAc缓冲体系中,D201×4树脂对钼(Ⅵ)的静态饱和吸附容量为631mg/g.树脂,用4.0mol/LNaOH能定量解吸。测得表观吸附速率常数k298=6.25×10-5s-1。树脂吸附钼(Ⅵ)的行为遵守Freundlich方程。298K时测得吸附反应热效应ΔH=25.5kJ/mol,表观吸附活化能Ea=19.1kJ/mol。树脂功能基RN+(CH3)3Cl-与Mo(Ⅵ)的摩尔比约为1∶2。     

4-氨基-三氮唑树脂对钼(Ⅵ)的吸附性能及其机理的研究

在Ph=5.0的Hac-NaAc体系中,4-氨基-三氮唑树脂(4-ATR)对Mo(Ⅵ)有较好的吸附性.静态饱和吸附容量As=189.5mg/g·R,用1～3moll-1Ha可以将吸附的Mo定量洗脱.298K测得吸附热力学参数△H=-27.3kJ·mol-1,△G298=-34.1kJ·mol-1,△S298=22.8J·mol-1·K-1.吸附机理研究表明4-ATP,功能基上的N与Mo(Ⅵ)发生配位键合,配位摩尔比为2:1.4-ATR具有较强的再生能力.     

D301R树脂吸附钼(Ⅵ)的研究

研究用D301R树脂吸附钼(Ⅵ)的过程。结果表明,在pH=3．5时吸附效果最佳。静态饱和吸附容量为755mg／g·树脂,表观吸附速率常数k298=2．17×10-5s-1。吸附过程遵循Freundlich方程,吸附反应热效应△H298=34．0kJ·mol-1,表观吸附活化能Ea=56．5kJ·mol-1。树脂功能基与Mo(Ⅵ)的摩尔比为1:2。可用5％NH4CI-10％NH3·H2O溶液解吸。     

氨基膦酸树脂吸附镉的性能及机理

研究氨基膦酸树脂对Cd(Ⅱ)的吸附行为。结果表明,pH=5.6时,静态饱和吸附容量为294.5mg/g·树脂,用2.0mol·L~(-1)HCl解吸,一次解吸率为95.2％。等温吸附服从Freundlich经验式,表观吸附速率常数k_(298)=1.35×10~(-5)s~(-1),表观吸附活化能E_a=15.7kJ·mol~(-1),吸附反应的ΔH=19.9kJ·mol~(-1),吸附物中树脂功能基与Cd(Ⅱ)的配位比约为1:1。     

氨基膦酸树脂吸附锌的研究

研究用氨基膦酸树脂吸附锌的过程 ,测定氨基膦酸树脂对Zn2 + 的吸附容量 ,考查介质pH、温度、吸附时间等因素对吸附过程的影响。测得氨基膦酸树脂对Zn2 + 的吸附容量为 191 2mg/g·R ;吸附速率常数 k2 98=1 37× 10 - 5s- 1 ;热力学参数ΔH0=2 0 8(kJ·mol- 1 ) ,ΔG0 =-31 4(kJ·mol- 1 ) ,ΔS0 =175 (J·mol- 1 ·K- 1 ) ;功能基与锌离子的配位摩尔比约为 1∶ 1。并对负载树脂解吸进行探讨     

110^＊树脂对铒（Ⅲ）的吸附及其机理

研究介质pH、温度、吸附时间、树脂量等因素对110*树脂吸附稀土金属铒离子的影响及吸附行为与机理.结果表明,110*树脂对铒(Ⅲ)的吸附在pH=5.70时最佳,静态饱和吸附容量为317mg·g-1(干树脂),用1.0～2.0mol/L的HCl作解吸剂可定量解吸.吸附过程服从Freundlich经验式,b值在2～10之间.吸附反应热力学函数△H=16.5kJ·mol-1,△S=58.7J·mol-1·K-1,△G=-1.00kJ·mol-1.表观吸附活化能Ea=31.3 kJ·mol-1,表观吸附速率常数k298=1.84×10-5s-1.树脂上C-OH中的H和C=O中的O与Er3+发生配位.     

亚胺基二乙酸树脂对镝的吸附及机理

亚胺基二乙酸树脂 (D40 1)对镝 (Ⅲ )的吸附在 pH =5 73时最佳。静态饱和吸附容量为 183mg/ g(树脂 ) ,用 2 0mol·L- 1 HCl作解吸剂 ,解吸率为 95 5 % ,表观吸附速率常数k2 98=2 64× 10 - 5s- 1 ,表观吸附活化能Ea=2 5 6kJ·mol- 1 ;等温吸附服从Freundlich经验式 ;吸附热力学函数ΔH0 =18 0kJ·mol- 1 ;吸附机理表明D40 1功能基上的O与Dy3+ 发生配位键合 ,树脂功能基与镝 (Ⅲ )的配位摩尔比为 3∶1。     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。