Synergistic Extraction of Lanthanides by 1-Nitroso-2-Naphthol and Trioctylphosphine Oxide in Paraffin Wax

1 ＩｎｔｒｏｄｕｃｔｉｏｎＡｓａｋｉｎｄｏｆｓｅｐａｒａｔｉｏｎｔｅｃｈｎｉｑｕｅ ,ｓｏｌｖｅｎｔｅｘｔｒａｃｔｉｏｎｉｓｗｉｄｅｌｙａｐｐｌｉｅｄ .Ｍｏｒｅ ｏｖｅｒ ,ｉｎｓｙｎｅｒｇｉｓｔｉｃｓｙｓｔｅｍｔｈｅｅｘｔｒａｃｉｎｇｐｏｗｅｒｏｆｔｈｅｍｉｘｔｕｒｅｅｘｃｅｅｄｓｏｂｖｉｏｕｓｌｙｔｈｅｓｕｍｅｆｆｅｃｔｏｆｔｈｅｅｘｔｒａｃｔｉｎｇｐｏｗｅｒｓｏｆｉｔｓｃｏｍｐｏｎｅｎｔｓ .Ｔｈｅｅｎｈａｎｃｅｄｅｘｔｒａｃｔｉｏｎｈａｓｂｅｅｎｏｂｓｅｒｖｅｄｉｎｍａｎｙｍｅｔａｌｅｘｔｒａ…     

Cerium Oxide Film Prepared from Molten Salts

Cerium oxide film is used in many fields,such as corrosion and protection, cell, high-temperature condition, superconductor, catalyst,electronic equipmeflt and meter indication. Nonaqueous oxide film is needed under many actualsituations. Oxide film prepared by electrochemical deposition in aqueous solution, however, isat least partly hydrated. Though dehydration canbe realized by heat tramment, the quality of thefilm will be apparently abased because of the afresh arrangement of atom/molecula…     

Synergistic Extraction of Rare Earth Ions by 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone and Trioctylphousphine Oxide in Paraffin Wax

ＳｙｎｅｒｇｉｓｔｉｃＥｘｔｒａｃｔｉｏｎｏｆＲａｒｅＥａｒｔｈＩｏｎｓｂｙ１ｐｈｅｎｙｌ３ｍｅｔｈｙｌ４ｂｅｎｚｏｙｌ５ｐｙｒａｚｏｌｏｎｅａｎｄＴｒｉｏｃｔｙｌｐｈｏｕｓｐｈｉｎｅＯｘｉｄｅｉｎＰａｒａｆｉｎＷａｘＧａｏＪｉｎｚｈａ...     

电脱氧法制备Ni基电池材料的研究

利用电脱氧法(FFC)从NiO-CeO2、NiO-SnO2氧化物制备CeNi5、Ni3Sn2.以不同温度烧结的混合氧化物试样作阴极,石墨碳棒作阳极,在850℃的CaCl2熔盐中,3.1 V电压下完成反应.采用SEM和XRD分析电解前后试样形貌及相组成.结果表明:烧结温度越高,试样的孔隙率越低,电解电流越小;不同温度烧结试样可电解出纯CeNi5相,低温烧结试样可电解出纯Ni3Sn2相,产物为疏松的海绵状.本实验为电池材料提供了一种新的制备方法.     

Thermodynamics of Solvent Extraction of Indium with EHEHPA

Molalities of In³⁺ were measured at ionic strength from 0.1 to 2.0 mol·kg⁻¹ in aqueous phase containing Na₂SO₄ as supporting electrolyte and at constant molality extractant at temperatures from 278.15 to 303.15 K in organic phase. The standard extraction constants K ⁰ at various temperatures were obtained by methods of extrapolation and polynomial approximation. Thermodynamic quantities for the extraction process were calculated.     

熔盐电解法制取Al-Mg-RE三元合金

以MgO为原料、RECl3-KCl-MgCl2为电解质，熔盐电解法制取Al-Mg-RE三元合金。结果表明：RE是由Al直接还原得到，而Mg是由电解得到的：可制得RE含量为0-8％～1．2％，Mg含量为1％-4％的三元合金；电解温度在720℃～780℃之间，电流效率随电解温度的升高而升高，电流效率最高可达到81．3％，但超过780℃，电流效率随电解温度的升高而降低；电流密度在0．8A／cm^2时电流效率最高，过低或者过高的电流密度都可以降低电流效率；电解过程中基本上不产生Cl2。     

溶剂萃取从酸性溶液中回收钯

概述了近十多年来溶剂萃取法从酸性溶液中回收钯的研究工作。并对各种类型的萃取剂萃取钯的优缺点做了评述，指出了溶剂萃取法回收钯的发展前景。     

Thermodynamics of Solvent Extraction of Indium with P507

At high acidity and high ionic concentration, molalities of In³⁺ were measured in aqueous phase containing Na₂SO₄ as supporting electrolyte at ionic strength from 0.1 to 2.0 mol/kg and at constant molality extractant at temperatures from 278.15 to 303.15 K in organic phase. The standard extraction constants K ⁰ at various temperatures were obtained by methods of extrapolation and polynomial approximation. Thermodynamic quantities for the extraction process were calculated.     

钴基合金在锌液中的摩擦磨损性能研究

在自行研制的试验设备上研究了几种钴基合金与Al2O3干磨损和在锌液中(460±5℃)腐蚀磨损的状况及磨损机理。研究表明,过共晶钴基合金的耐腐蚀磨损性能要优于亚共晶合金,但是干磨损时情况完全相反。在不同的摩擦副中几乎都有磨粒磨损发生。钴基合金的腐蚀磨损机制主要是材料的塑性变形、脆性断裂和磨粒磨损。     

MIBK双溶剂萃取法制备原子能级氧化锆和氧化铪的工艺设计

介绍了国内外制备原子能级氧化锆、氧化铪工艺的研究现状，并对各种工艺流程的优劣进行了技术经济分析。江西晶安高科在我国率先完成了规模为30以的原子能级氧化锆、氧化铪分离工艺中试。其采用MIBK＋有机试剂L双溶剂萃取法分离锆铪，得到的氧化锆中氧化铪含量小于0．006％，氧化铪纯度大于98％。     

溶剂萃取分离金川料液中的贵金属

用全萃取分离金川Ｏｓ、Ｒｕ蒸馏残液中的贵金属。首先用贵贱金属分离法除去残液中的贱金属及硫酸盐，使贵金属转入盐酸介质，然后用ＤＢＣ萃金，自制的Ｐｄ（Ⅱ）萃取剂萃Ｐｄ或共萃Ｐｔ、Ｐｄ再用ＴＢＰ萃Ｉｒ，萃残液为粗氯铑酸溶液，给出了贵贱分离及全萃取的实验数据。     

铂族金属精炼中的溶剂萃取技术

铂族精炼中的溶剂萃取法比传统的沉淀法具有许多优点。本文简述铂族溶剂萃取机理,分析了目前国际上精炼厂所采用的3种萃取流程,还介绍了我国铂族金属溶剂萃取技术及机理研究的新进展。     

NaCl—KCl熔融体系电镀钛的研究

研究了在NaCl-KCl熔融盐体系中进行难熔金属钛的电镀过程中,K2TiF6添加剂的加入量等因素对电镀结构的影响,并对直流电镀、脉冲电流电镀在熔融盐电镀中的应用进行了比较。使用换向脉冲电流电镀的新工艺,在碳钢表面获得了较好的金属钛镀层。     

Molten solvent extraction behavior of trivalent La, Sm, Dy, and Yb with tri-n-butyl phosphate into molten paraffin wax at 60℃

The extraction behavior of La3 , Sm3 , Dy3 , and Yb3 in sodium acetate-acetic acid medium was studied with tri-n-butyl phosphate (TBP) at 60 ~C using paraffin wax as a diluent. The extraction percentage is greater than 85% in the pH range of 6 to 8. The result of slope analysis method indicates that the compositions of the extracted species are different between the light and heavy rare earths. The formula of the extracted species is found to be La(TBP)(OH)(Ac)2 for La3 and Yb(TBP)(OH)3 for Yb3 . The effects of extracting time, the concentration of TBP in the organic phase and salts on the extraction efficiency were also discussed.     

Solid-liquid Extraction Spectrophotometric Determination of Copper with 2,9-dimethyl-1,10-phenanthroline

Solid-liquid extraction deterndnation andseparation of metal ions has been well devel-oped in recent year[l--4]. The deterndnation oflanthanides and precious metals were exten-siveIy investigated by using solid diluent sol-vent in our previous works[5--7]. These previ-ous studies indicate that high temPerature andlow melting point solvent give a lot of advan-tages which is absent in room temPeratllrecommon liquid-liquid extraction.Copper(I) and neo-cuproine can stronglyform a yellow colored …     

铁硅金属间化合物耐熔铝腐蚀性研究

对不同相的铁硅金属间化合物套管在熔融铝液中进行了不同温度的耐熔铝腐蚀性测试,并观察其断口形貌.结果表明：质量成分为Fe50Si50的套管耐蚀性最好,SiC冷静压烧结管次之,Fe75Si25套管最差;随着腐蚀温度的升高,套管的腐蚀程度加重,但在950℃温度下腐蚀96 h后,套管仍具有良好的耐熔铝腐蚀性能;腐蚀过程中,Al原子并未置换出Fe原子而与之发生反应,断口形貌显示材料表面缺陷可能导致了腐蚀的发生.     

基于熔融态氯化镁热解实现新镁钛联合的研究

现行的Kroll法生产海绵钛存在的问题是镁电解的投资较高,以及氯的环境污染控制要求较高。基于此,本工作提出了将还原蒸馏产生的熔融态氯化镁直接氧化热解得到高纯氧化镁及氯气,氧化镁经热还原法炼镁,实现海绵钛过程新的镁钛联合。本工作对新的镁钛联合关键环节熔融态氯化镁氧化热解过程进行了研究,通过绘制Mg-O-Cl体系优势区图,获得Mg O相稳定存在的条件;确定了适宜的反应条件:反应温度1200℃、输入氧分压0.1 MPa,反应时间为50 min,该条件下,氯化镁的热解率可达99.9%,产物中氯含量为0.00262%;XRD和SEM分析表明:氧化镁结晶度高,颗粒粒度分布均匀,分散性较好,为不规则的六面体,氧化镁颗粒的平均粒度在1μm左右。     

双(正-辛基亚磺酰)乙烷-乙酸丁酯萃取体系分离富集钯、铂

本文研究了KSCN存在的条件下双（正－辛基亚磺酰）乙烷（简称BOSE）－乙酸丁酯体系萃取Pd,Pt的行为。实验结果表明，利用1－2mol/H HCl介质可以进行Pd,Pt的定量分离。本法应用于合成矿样的Pd,Pt分离富集，结果令人满意。     

铁硅金属间化合物耐熔铝腐蚀性研究

对不同相的铁硅金属间化合物套管在熔融铝液中进行了不同温度的耐熔铝腐蚀性测试,并观察其断口形貌。结果表明:质量成分为Fe50Si50的套管耐蚀性最好,SiC冷静压烧结管次之,Fe75Si25套管最差;随着腐蚀温度的升高,套管的腐蚀程度加重,但在950℃温度下腐蚀96 h后,套管仍具有良好的耐熔铝腐蚀性能;腐蚀过程中,Al原子并未置换出Fe原子而与之发生反应,断口形貌显示材料表面缺陷可能导致了腐蚀的发生。     

氧化镁的耐熔盐腐蚀特性研究

通过添加不同摩尔比的烧结助剂，在1640℃烧结了相对密度大于99％的氧化镁陶瓷样品。并将这些样品置于1050℃的氯化钙熔盐中进行腐蚀。烧结助剂的加入能够降低氧化镁烧结温度，降低样品开气孔率。样品经腐蚀后有增重，增重量的大小和开气孔率有一定关系。烧结的致密氧化镁陶瓷具有较强的抗熔盐腐蚀能力。