H2O2—水杨基荧光酮指示反应体系动力学光度法测定痕量锰

在碱性介质中，痕量锰（Ⅱ）能显著催化H2O2氧化水杨基荧光酮的反应。本文据此建立了测定痕量锰的催化动力学分析法，测定条件为：4．0×10－5mol／L水杨基荧光配（SAF）0．012／H2O2，2．4×10-2mol／LNaOH，60℃。线性范围为0．1～2．0μg／L，方法检测限为0.02μg／L。测得反应表现活化能为20．78kJ／mol。测定了土壤、碳素钢及铝合金等样品中锰的含量，结果满意。     

中孔纳米二氧化钛光催化降解苯酚的研究

以溶胶-凝胶法合成中孔纳米二氧化钛，考察不同光降解反应条件下其对苯酚溶液的降解效果。结果表明，反应液pH在7～9。通氧速率为1g／L，光催化剂用量为0．3～0．4g／L时，光催化降解效果最好。制备的中孔二氧化钛由于其孔状结构使光催化效率明显高于P-25。     

MgO包覆LiCoO2的结构及性能

通过湿化学方法首先制得锂离子电池正极材料LiCoO2，以MgSO4和氨水为原料对LiCoO2进行表面包覆得到MgO包覆LiCoO2样品。扫描电镜(SEM)及光电子能谱对包覆样品的分析结果表明：MgO均匀地包覆在LiCoO2的表面；X射线衍射(XRD)图谱及晶胞参数表明：包覆MgO不改变LiCoO2的结构；电性能测试结果表明：MgO-LiCoO2比LiCoO2具有更高的可逆容量，其中当包覆量为0．5％～1．0％时，效果最好。     

氧化铁-云母纳米薄膜材料的制备研究

本文利用加碱中和法在天然白云母基片上沉积氧化铁纳米颗粒薄层，制备出Fe2O3—云母纳米薄膜材料，并探讨了实验条件对结果的影响，总结得到Fe2O3—云母纳米薄膜材料的最佳实验制备工艺参数。结果与分析表明，工艺条件如pH、温度等因素的不同设置，将带来不同的成膜效果，如薄膜材料的均匀性、包覆率，及其颜色。实验得到的Fe2O3—云母纳米薄膜材料的最佳制备工艺为：氯化铁溶液浓度为0．2mol／l，其用量与云母粉料比为11：1；成膜过程：pH值控制在3左右，反应温度为70～80℃，滴定速度为1．0～1．4ml／min；焙烧阶段：650℃、900℃煅烧2小时，即可获得带有金黄光泽的Fe2O3—云母纳米薄膜材料。     

氢化物发生原子荧光光谱法测定化妆品中的砷、汞

采用HNO3--H2SO4混合酸消化化妆品样品，氢化物发生原子荧光光谱法测定As、Hg，对仪器条件、HCl酸度、共存干扰进行了试验。As的方法检出限为0．0227μg／g，测定精密度0．9％～1．4％，回收率为96．0％～102.7％、Hg的方法检出限为0．171ng／g，测定精密度1．4％～2．0％，回收率为90．0％-105．0％。     

流动注射——树脂在线分离—分光光度法自动测定铌反萃取液中微量钽的研究

研究了铌反萃取液（合常量铌的溶液）中微量钽的测定。采用流动注射进样（18μL），用组成为1mol／LHCl＋1％HF的溶液作为上柱液，通过阴离子交换树脂柱吸附微量钽使之与大量铌分离，之后用组成为0．66mol／LNH4Cl＋0．33mol／LNH4F溶液作为钽的解吸液。解吸出的钽在缓冲液和络合剂存在下与溴邻苯三酚红-溴化十六烷基三甲胺反应，形成的紫色络合物停流3min后，在620nm和38℃条件下进行吸光度测定。方法可用于铌反萃取液中Ta2O5含量为0．05～0．5g／L的测定。样品的相标偏为±5％，回收率为90％～100％，分析速度约为7样次／h。     

密实移动床吸附塔吸附及多塔串联淋洗的研究

本文叙述300mm×6000mm密实移动床吸附塔对新疆七三七矿地浸液的吸附工艺试验结果。试验使用201×7强碱性阴离子交换树脂，与由下进料方式的原料铀溶液呈逆流操作，其传质高度6m。原料液来自地浸生产线，铀浓度为46～49mg／L，进料空塔线速度35～45m／h，树脂工作容量58～63mg／g（干）．尾弃铀浓度均＜lmg／L。淋洗采用四塔串联，传质高度1．8m，淋洗剂1mol／LNaCl＋0．05mol／LH2SO4，空塔线速度2m／h，合格液铀浓度6．6～7．7g／L，贫树脂含铀0．24～0．4g／L。结果表明，密实移动床吸附塔处理新疆七三七矿地浸液是适用的。     

用LIX 622从含砷铜／锌混合精矿加压浸出液中萃取铜

研究采用LIX622从含砷铜／锌混合精矿加压浸出液中萃取铜的工艺过程。含Cu10～15g／L，pH=1．0～1．2的加压浸出料液，采用22．58％LIX622-煤油体系，经过3级萃取、3级洗涤和3级反萃，萃余液中含铜可降到0．3～0．6g／L，平均铜萃取率达95．40％，反萃液满足电积工艺要求。     

脉冲电解制备纯铜的工艺条件

在小型电解槽中。研究脉冲电解法精炼铜的最佳工艺条件。脉冲电解参数为：平均电流密度500A／m^2，脉冲宽度6．0ms，脉冲间隔12．0ms。结果表明。最佳电解工艺条件：电解温度30℃；硫酸浓度140～180g／L；极间距5～6cm；氯离子添加量3．0mg／L；硫脲添加量0．5mg／L；骨胶添加量0．75mg／L；有害杂质允许含量(g／L)，As^3 ≤0．1,Sb^3 ≤0．05,Bi^3 ≤0．05。     

碳羟磷灰石对废水中铅离子吸附研究

利用废弃蛋壳制备碳羟磷灰石（简称CHAP），并用作去除废水中Pb^2＋的吸附剂。考查了pH值、吸附时间、温度、吸附剂用量以及Pb^2＋初始浓度等因素对吸附效果的影响。结果表明：0．6g／L的CHAP对750mg／L的Pb^2＋的去除率高达99．9％，吸附容量达到1243．75mg／g。CHAP对Pb^2＋吸附的吸附等温线均符合Freundlich和Langmuir两种模式，从Freundlich方程中的常数1／n=0．0184可知，该吸附反应为吸热自发反应，且反应速率快。     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

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