萃取柱色层分离法制取高纯氧化钇

研究了萃取色层法制备高纯氧化钇的最佳条件,指出,P_(507)-硅球色层柱和HCl淋洗剂体系能分离氧化钇中的轻稀土杂质,N_(263)-硅球色层柱和NH_4SCN淋洗剂体系能分离氧化钇中的重稀土。我们采用两者的组合,制备了接近六个九的高纯氧化钇。收率约60％左右。     

由还原渣提取高纯氧化铥和氧化镥新工艺研究

研究了以铥、镱、镥富集物经金属镧热还原法提取金属镱后所得的还原渣为原料，经酸溶配料，用稀土硫酸钠复盐沉淀除去镧，滤液用Ｐ５Ｓ７萃淋树脂萃取色层法提取高纯氧化铥、氧化镱，氧化镥（纯度均大于９９．９５％），并获得较高的收率。确定了稀土硫酸钠复盐沉淀除镧和萃取色层法分离铥、镱、镥的最佳分离条件。     

同还原渣提取高纯氧化铥和氧化镥新工艺研究

研究了以铥、镱、镥富集物经金属镧热还原法提取金属镱石所得的还原渣为原料，经酸溶配料，用稀土硫酸钠复盐沉淀除去镧，滤液用Ｐ５０７萃淋树脂萃取色层法提取高纯氧化铥、氧化镱，氧化镥（纯度均大于９９．９５％），并获得较高的收率。确定了稀土硫酸钠复盐沉淀除镧和萃取色层法分离铥、镱、镥的最佳分离条件。     

高纯氧化铕中14个稀土杂质的化学光谱测定——P507-HCl体系萃取色层分离

本文研究了用P507为固定相,硅球作载体,盐酸为流动相的萃取色层法从高纯氧化铕中分离14个稀土杂质,把富集的稀土杂质用PMBP萃取,10％HCl反萃取,用发射光谱法进行测定。其分离周期为6小时,平均回收率在83.75、113.00％,相对标准偏差在3.70～15.70％。方法较简便、快速。     

钨渣的综合利用研究

研究了钨渣的综合利用技术，依据钨渣的主要成分特点，用还原熔炼法提取出铁锰钨铌等多元素合金，再利用硫酸自热反应分解还原熔炼渣并用水浸出铌，钍，铀，稀土等，然后，采用萃取和萃取色层法分离出大于９９．９９９％的高纯氧化钪。本工艺具有明显的经济效益，环境效益和社会效益。     

萃取色层法净化钴溶液制备高纯钴的研究

高纯钴盐溶液的净化是制备高纯金属钴的关键,钴与镍的深度分离是制备高纯钴盐溶液的核心技术之一。采用HPD-100苯乙烯-二乙烯基苯大孔吸附树脂和P507萃取剂制备的P507萃淋树脂净化硫酸钴溶液,研究了萃淋树脂的萃取容量以及萃取pH值、淋洗pH值、流出体积等因素对镍钴的分离效果的影响。研究表明:在Φ65 mm×700 mm色层柱中采用含55%P507的萃淋树脂,控制萃取pH值3.7,缓冲溶液淋洗pH值2.98的条件下净化硫酸钴溶液,溶液流速为1.0～1.5个色层柱空体积/h,当淋出液体积为色层柱空体积的3倍时收集淋出液,并用pH 1.0的盐酸反萃,得到高纯氯化钴溶液。将该溶液除去夹杂的有机物,浓缩后进行电解,得到高纯钴经GDMS检测20个杂质元素总含量小于10×10-6%。萃取色层法净化后的溶液,满足制备高纯钴的要求。     

电化学在稀土湿法冶金中的应用──I．铈的电解氧化及分离工艺

电化学在稀土湿法冶金中的应用──Ｉ．铈的电解氧化及分离工艺刘建刚（包钢稀土研究院包头０１４０１０）目前，国内外单一稀土氧化物的制备普遍使用溶剂萃取法和离子交换色层法。由于稀土元素同在镧系（钪、钇除外），结构相似，使得他们之间的分离系数很小，要实现萃取...     

包钢稀土成果用于生产

(一)萃取色层法制备高纯氧化铽试验研究; (二)从碱法处理稀土精矿的工业废液中制取固体氢氧化钠的试验研究,年经济效益十万元; (三)萃取流量自动控制系统的研究; (四)从包钢选矿厂尾矿中选取高品位     

P507萃淋树脂提取高纯氧化镝的研究

以Ｐ５０７萃淋树脂为萃取色层的固定相、盐酸为流动相，在Φ×Ｌ＝１３ｍＭ×６４ｍｍ柱中，分别研究了洗液酸度、流速、稀土负载量和温度对稀土元素铽、镝、钬分离的影响，从而初步确定了从Ｔｂ－Ｄｙ－Ｈｏ混合料液中提取高纯镝的适宜工艺条件。     

电解质水溶液中钴、镍分离、提纯研究进展

高浓度、高纯度钴盐电解质水溶液是电解或电解精炼生产高纯乃至超高纯金属钴的关键.钴、镍离子深度地分离是制备该种电解质水溶液的核心任务.研究发现目前主要的分离、提纯方法包括:离子交换法、萃取色层法、膜分离法和溶剂萃取法等.研究对象主要集中在含高镍、低钴的硫酸盐水溶液体系.离子交换法、萃取色层法是实现两者深度分离的有效手段，溶剂萃取法则更易实现规模化.研究主要针对有机萃取剂和吸附材料的研发、改性、组合和分离提取工艺的改进等展开.文中对含钴、镍电解质水溶液中钴、镍分离研究进展进行总结评述，并对其发展进行展望.      

高纯氧化镱制备工艺研究

通过小型实验和扩大实验研究了用Cl-P507萃取色层法制备高纯氧化镱的工艺流程和工艺条件，重点考查了淋洗酸度对分离效果的影响规律。在扩大实验中，色谱柱为Φ102mm×2000mm，以99%Yb     

Solid phase synthesis of benzylamine-derived sulfonamide library

Using solid phase synthesis, a library has been constructed of benzylamine-derived sulfonamides which have strong inhibitory activity against the blood coagulant thrombin. The library compounds were obtained in good yield and high purity; four of these thrombin inhibitors showed nanomolar potency (Ki 600-10 nM).     

副产SiCl4生产光纤用高纯SiCl4

本文探讨了从生产多晶硅副产物中综合回收利用ＳｉＣｌ４并提纯使其达到生产光导纤维秀的质量要求。ＳｉＣｌ４作为生产光纤光缆的基础原料,其质量好坏直接影响光纤光缆的质量。ＳｉＣｌ４是工业硅原料与ＨＣｌ气体合成产物的一部分,其杂质含量很高。研究探讨光纤用ＳｉＣｌ４中各种杂质元素和其它化合物存在的形态、除去的方法和其对光子传递及光通信的影响和危害,并建立工业化光纤用高纯ＳｉＣｌ４生产线是本文研究的目的。将生     

The gallium-deferoxamine complex: stability with different deferoxamine concentrations and incubation conditions

Previous studies report that deferoxamine (DFO) binds metallic ions such as Fe3+, In3+ and Ga3+ with very high affinity. This property of DFO has been utilized to label DFO-coupled compounds with radiometals such as 67Ga and 111In. We have studied the effect of low DFO concentrations and of different incubation conditions on the stability of the 67Ga-DFO complex. In our experience high (> 5 microM) DFO concentration appears to be critical in obtaining high radiochemical purity of such complexes.     

CIS薄膜太阳能电池吸收层用高纯CuInSe2块体材料的制备

以Cu,In,Se为原料制备了高纯CuInSe2块体材料.分别采用熔盐净化-电解-区域熔炼工艺和真空蒸馏-区域熔炼联合工艺对原料In,Se进行提纯,可获得纯度99.9999%In和99.9995%Se.采用多室真空梯度合成工艺,制备出纯度大于99.999%的CuSe、In2Se3中间化合物.将其破碎混匀后压制烧结,合成出的块体材料成分均匀、纯度大于99.999%.XRD分析表明,块体相结构为CuInSe2相.     

高纯钨研究现状及制备工艺方法综述

高纯钨具有很高的附加价值,其市场前景与集成电路发展密切相关,高纯钨的净化是目前高纯钨生产中的重要研究课题。简要介绍了国内外高纯钨的生产现状、制备工艺及其纯度表征,在此基础上进行了展望。     

高纯铝的研究进展

超高纯铝比原铝具有更好的导电性、延展性、反射性和抗腐蚀性,在电子工业及航空航天等领域有着广泛用途,目前国内只有极少数厂家能够生产纯度达 99.999%(质量分数）的高纯铝。主要介绍了国内外生产高纯铝的企业、主要生产工艺及生产设备,对国内外高纯及超高纯铝的研究现状及进展情况进行了分析总结。     

Electrocatalytic Formation and Inactivation of Intermetallic Compounds in Electrorefining of Silicon

Silicon for solar cell purposes is today produced by an energy intensive process exhibiting high irreversible thermodynamic energy losses. The purity of the product; 99,9999999 pct (9N), far exceeds what is generally accepted to be the requirements for photovoltaic purposes (4-6N). According to thermodynamics, all elements except boron may be removed from silicon by three layer electrochemical refining above the melting point of Si. Boron, on the other hand, shows higher affinity to specific transition metals compared to silicon. This may be exploited by applying two principles in parallel; electrochemical refining and electrocatalyzed reaction-precipitation of transition metal borides as heavy, stable particles. In this study we report on the formation of such compounds at the cathode-electrolyte interface during electrochemical refining. The trends and mechanisms observed in the laboratory scale investigation indicate that high purity silicon may be produced in industrial scale reactors at low cost- and energy intensity.     

Specific deuteromethylation by the Eschweiler-Clarke reaction. Synthesis of differently labelled variants of trimethylamine and their use for the preparation of labelled choline and acetylcholine

Reductive methylation (the Eschweiler-Clarke reaction) was used as a route for the synthesis of differently deuterium labelled variants of trimethylamine with the ultimate aim of preparing labelled variants of choline and acetylcholine. Combinations of unlabelled and labelled formaldehyde and formic acid yielded symmetrically labelled trimethylamines of high isotopic purity. The labelled congeners to acetylcholine and choline that were prepared subsequently provide suitable internal standards and tracers to be used in mass spectral analysis and in the evaluation of the pharmacokinetics of the parent compounds.     

Isolation and Purification of Unstable Iridoid Glucosides from Traditional Chinese Medicine by Preparative High Performance Liquid Chromatography Coupled with Solid-phase Extraction

An efficient preparative method was successfully developed for isolation and purification of unstable components from medicinal plant extracts, using a combined method of preparative high performance liquid chro- matography(HPLC) and solid-phase extraction(SPE). The aim of this study was to obtain an effective method with high preparative efficiency and importantly to avoid the transformation of unstable compounds. The preparative HPLC system was based on an LC/MS controlled four-channel autopurification system. The SPE method was per- formed with a C<,18> packing material to trap the target compounds and to remove the acidic additive derived from the mobile phase. Using this method, the unstable iridoid glucosides(IGs) as model compounds were successfully iso- lated and purified from the extract of Hedyotis diffusa Willd. Six IGs(including one new minor IG) and one nucleo- tide compound were simultaneously obtained, each with a purity of >91% as determined by HPLC. The structures of the isolated compounds were identified by UPLC/Q-TOF MS, UV, ID and/or 2D NMR. It was demonstrated that the combination of preparative HPLC with SPE is a versatile tool for preparative purification of unstable compounds from complex natural products.