高温合金酸浸液回收高纯铼酸铵的试验研究

采用D296树脂吸附—NH4SCN溶液解吸—KReO4晶体析出—C160树脂除杂等工序从高温合金酸浸液中回收高纯铼酸铵。结果表明,铼吸附率可达99.03%;当NH4SCN溶液浓度为8%、NH4SCN解吸液与负载树脂体积比10∶1、解吸流速1BVs/h时,铼解吸率为99.55%;采用10倍理论用量KCl进行浓缩结晶得到KReO4,铼结晶率达到95.14%;再经C160树脂除杂—氨水中和—浓缩结晶—1次重结晶,制得纯度达99.995%的高纯铼酸铵。     

钼酸铵生产工艺优化浅析

文章阐述了现有钼酸铵生产工艺的特点及不足,进行大量的小型试验研究,提出了优化工艺,确定了新工艺的较佳工艺条件。利用新工艺处理钼焙砂,一方面可大大降低焙砂中的杂质含量,降低了硫化铵的单耗,每吨钼酸铵硫化铵单耗由0.025t降至0.01t以下,且有效地提高钼酸铵产品品质和纯度,另一方面实现了钼铼有效分离,并为铼金属综合回收提供了有利条件。     

俄罗斯对贫铜矿和铜镍矿处理过程中回收铼的研究

介绍了俄罗斯从贫铜矿和铜镍矿中回收铼的研究概况。     

Thermophysical properties of molybdenum and rhenium

Thermophysical properties measurements have been made on the metals molybdenum and rhenium at high temperatures and a pressure of 0.2 GPa. These measured properties include volume, temperature, enthalpy, and electrical resistivity. Values for these quantities are shown for both solid and liquid phases. In addition, sound velocities were measured for liquid molybdenum.     

基于热导传感器的高精密测氮仪设计

介绍一种基于热导传感器的高精密测氮仪的研究与设计.对测氮仪中的核心部件热导传感器进行了理论分析与设计,并在此基础上,采用CPLD ATF1508AS的架构平台,对控制系统进行了硬件设计和软件设计,通过对热导传感器的检测和整机的实验,该测氮仪具有测量速度快、测量精度高、信噪比高等优点,准确度和精密度均远高于国家标准.     

酮类试剂萃取分离铼的研究

简述了碱性体系中酮类试剂对铼的萃取分离研究，研究了萃取率与萃取剂用量、体系碱性浓度以及金属离子浓度等之间的关键，并比较了含氧萃取剂及酮类试剂间对铼的萃分离的能力。丙酮对铼的萃取分离已用于岩石中痕量铼的实际分析测定。     

Dynamic combinatorial self-assembly of cyclophilin hCyp-18 ligands through oxorhenium coordination

The dynamic combinatorial assembly of independent modules A and B through oxorhenium(V) coordination by a NS2+S motif in the presence of cyclophilin hCyp-18-an important peptidyl-prolyl isomerase-was investigated. Increasing glutathione (GSH) concentrations were used to dissociate [ARe(V)OB] complexes that displayed low affinity for hCyp-18. Conversely, coordinates that displayed submicromolar affinities for hCyp-18 were protected against thiol exchange and could be detected by LC-MS. Determination of the GSH concentration that decreased the extracted ionic current of the complex by 50 % (CC(50)) enabled the selection of three oxorhenium coordinates that were shown to bind to the active site of hCyp-18 and to inhibit its peptidyl-prolyl isomerase activity in the micromolar to submicromolar range.     

Novel ReS2/g-C3N4 heterojunction photocatalyst formed by electrostatic self-assembly with increased H2 production

Binary heterostructures (named as CN@Re) composed of ReS₂ nanospheres and g-C₃N₄ nanosheets are constructed by electrostatic self-assembly method. The ReS₂ nanospheres were prepared by hydrothermal method and the g-C₃N₄ nanosheets were treated with surface charge modification. Hydrogen production efficiency of modified CN and CN@Re nanostructures was evaluated in a simulated solar environment. To our surprise, CN5@Re5% exhibits the highest H₂ production up to 1823 μmol g^?1h^?1 of CN5@Rey, which is 3.2 times as high as CN. The improvement of the photocatalytic hydrogen production efficiency of modified CN is attributed to its interaction with the hole sacrificing agent lactic acid, while the improvement of the photocatalytic activity of CN@Re nanostructure is attributed to the efficient electron transfer efficiency between CN and ReS₂ and the enhanced light absorption capacity brought by ReS₂. In addition, the photocatalytic stability of CN5@Re5% has been studied, which can maintain a stable rate of hydrogen production over four cycles. The apparent quantum efficiency is as high as 4.10% at 365 nm and 2.82% at 420 nm.     

钼精矿焙烧烟气淋洗液中回收铼的试验研究

针对低浓度含铼淋洗液中铼的回收进行了树脂吸附和解吸试验研究。通过研究对比旧树脂和新型树脂,得出合适的吸附和解吸条件。同时通过对温度、流速、解吸浓度等因素进行研究。结果表明,随着氨水浓度升高至3%时,解吸率可升高到98.54%。同时温度越低,流速越小,越有利于铼吸附。     

从净化洗涤污酸中提取金属铼的试验研究

研究了萃取法从污酸中直接提取铼生产铼酸铵的可行性,确定了工艺流程与条件参数。