核燃料萃取的化学(Ⅳ) 磷酸二丁酯和磷酸三丁酯对六价铀的协同萃取

通过在不同条件下萃取分配比的测定和对数作图法,确定了磷酸二丁酯的四氯化碳溶液从0.1M H_2SO_4溶液中单独萃取六价轴的反应式为: UO_2~(++)+2H_2A_2(O)=UO_2A_2(HA)_2(O)+2H~+.上式中H_2A_2为磷酸二丁酯的二聚分子;下角标(O)表示有机相.同时测定了上述反应的平衡常数: K_1={[UO_2A_2(HA)_2]O[H~2]~2}/[UO_2~(++)][H_2A_2]_O~2=10~(10.63)用磷酸二丁酯和磷酸三丁酯的四氯化碳溶液共同萃取六价铀时,磷酸二丁酯在有机相中的二聚分子的浓度[H_2A_2]_O为10~(-3)×10~(-2)M,磷酸三丁酯在有机相中的浓度[B]_O为3×10~(-3)—1M的范围内均有协同效应,其反应机理为UO_2~(++)+3/2H_2A_2(O)+B_(O)=UO_2A_2(HA)B_(O)+2H~+, K_2={[UO_2A_2(HA)B]_O[H~+]~2}/[UO_2~(++)][H_2A_2]_O~(3/2)[B]_O=10~(4.24)文中还详细讨论了与第尔逊(D.Dyrssen)研究结果的分歧及产生分歧的原因.     

Rare Earth Complexes of Aminopolycarboxylic Acid Ⅱ.Synthesis and Structure of Lanthanum Complex of Dipicolinic Acid

Complexes of the general formula,(Me_4N)_2[(Ln(HDPA)_2(DPA)]·Cl,have been synthesized,whereLn=La,Ce,Pr,Nd,Sm and H_2DPA=dipicolinic acid.Among them,the crystal structure of the La complexhas been determined by a four-circle X-ray diffractometer to a final R value of 0.080.The crystal isorthorhombic,space group Pccn with a=1.0321(1),b=1.4951(2),c=2.0766(6)nm,V=3.2044(9)nm~3,andZ=4.The rare earth ion is nine coordinated to forming a tortuous tricapped trigonal prism.     

Synthesis and Crystal Structure of a Heteronuclear Complex［MnSc（DTPA）（H_2O）_2］·2H_2O

ＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆａＨｅｔｅｒｏｎｕｃｌｅａｒＣｏｍｐｌｅｘ［ＭｎＳｃ（ＤＴＰＡ）（Ｈ_２Ｏ）_２］·２Ｈ_２ＯＺｈａｎｇＹｉ；ＬｉＢｉａｏｇｕｏ；ＧａｏＳｏｎｇ；ＪｉｎＴｉａｎｚｈｕ；ＸｕＧｕａｎｇｘｉａｎ（?..     

Crystal Structure of a Heteronuclear Complex of Erbium-Yttrium and Glycine [ErY(GIy)_6(H_2O)_4] (ClO_4)_6·5H_2O

The title complex [ErY(Gly)_6(H_2O)4](ClO_4)_6·51H_2O has been synthesized.Its crystal structure has beendetermined by X-ray diffraction method.The crystal is triclinic with space group P.The unit cell parametersare as follows:a=1.1518(4) nm,b=1.4105(7) nm,c=1.5530(6) nm,α=96.61(3)°,β=102.74(3)°,γ=105.70(3)°,V=2.3277(17) nm~3,Z=2,D_(calc)=2.091 g/cm~3.The structure has been refined to a final R of0.0785.The crystal-is an infinite chain complex,in which four carboxyl groups from glycine molecules bridge theEr~(3+) and Y~(3+) ions,and the other two carboxyl groups bridge two adjacent Er~(3+) or Y~(3+) ions.     

对于吐哈油田油气储运中存在问题的分析

石油是现代社会使用的主要能源之一,石油的开采业及加工行业也得到了长足的发展。油气储运属于炼油厂、加油站油库等单位的主要工作内容之一,由于该项工作所处的环境较为复杂,影响因素较多,需要对于该过程中出现的各种问题采取有效措施,保障油气储运的安全性,并降低损耗。本文简单分析了油气储运中出现的常见问题,如火灾安全隐患、油气蒸发损耗及管道开裂腐蚀问题,并针对上述问题提出了几点对策,包括防火措施、改造油罐及强化管道保护,为从事油气储运的人员提供一定的参考与借鉴。     

Crystal Structure and Specific Rotation of a Tetrakis－HistidineOcto－Aquo Di－Erbium Perchlorate Complex

ＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅａｎｄＳｐｅｃｉｆｉｃＲｏｔａｔｉｏｎｏｆａＴｅｔｒａｋｉｓ－ＨｉｓｔｉｄｉｎｅＯｃｔｏ－ＡｑｕｏＤｉ－ＥｒｂｉｕｍＰｅｒｃｈｌｏｒａｔｅＣｏｍｐｌｅｘＹａｎｇＷｅｉｃｈｕｎ（杨维春）；ＣｈｅｎＤｅｆｕ（陈德福）；Ｊｉ...     

Synthesis and Crystal Structure of Heteronuclear Complex of Copper and Ytrium with Glycine

ＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆＨｅｔｅｒｏｎｕｃｌｅａｒＣｏｍｐｌｅｘｏｆＣｏｐｐｅｒａｎｄＹｔｒｉｕｍｗｉｔｈＧｌｙｃｉｎｅＷａｎｇＲｕｉｙａｏ（王瑞瑶），ＧａｏＦｅｎｇ（高峰），ＪｉｎＴｉａｎｚｈｕ（金天柱）（...     

pH-Potentiometric Study on Rare Earths and Calcium Binary and Ternary Complexes with DL-Malic Acid and L-Hydroxyproline

ｐＨＰｏｔｅｎｔｉｏｍｅｔｒｉｃＳｔｕｄｙｏｎＲａｒｅＥａｒｔｈｓａｎｄＣａｌｃｉｕｍＢｉｎａｒｙａｎｄＴｅｒｎａｒｙＣｏｍｐｌｅｘｅｓｗｉｔｈＤＬＭａｌｉｃＡｃｉｄａｎｄＬＨｙｄｒｏｘｙｐｒｏｌｉｎｅＷａｎｇＲｕｉｙａｏ（王瑞瑶），ＧａｏＦ...     

HS400单缸风冷柴油机的开发

根据国内市场对小型风冷单缸柴油机的需求以及满足即将出台的新一代单缸机标准要求,上海内燃机研究所进行HS400单缸风冷柴油机的开发.开发工作以符合工厂实际情况的设计思想和开发策略为先导,依托成熟技术平台,对进排气道、供油系统、配气机构、缸盖三孔位置和燃烧室等进行优化设计,对关键零部件及配置进行更符合发动机产品制造工艺,更...     

Synthesis and Crystal Structure of an Erbium Complex with Valine [Er_2(Val)_4(H_2O)_8](ClO_4)_6·4H_2O

ＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆａｎＥｒｂｉｕｍＣｏｍｐｌｅｘｗｉｔｈＶａｌｉｎｅ［Ｅｒ２（Ｖａｌ）４（Ｈ２Ｏ）８］（ＣｌＯ４）６·４Ｈ２ＯＹａｎｇＷｅｉｃｈｕｎ（杨维春），ＷａｎｇＲｕｉｙａｏ（王瑞瑶），ＪｉｎＴｉａｎ...