Synthesis and Crystal Structure of Synergistic Complex of Tris（1－Phenyl－3－Methyl－4－Trifluoroacetyl－Pyrazolone－5） Mono （TriphenylphosphineOxide） Scandium

ＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆＳｙｎｅｒｇｉｓｔｉｃＣｏｍｐｌｅｘｏｆＴｒｉｓ（１－Ｐｈｅｎｙｌ－３－Ｍｅｔｈｙｌ－４－Ｔｒｉｆｌｕｏｒｏａｃｅｔｙｌ－Ｐｙｒａｚｏｌｏｎｅ－５）　Ｍｏｎｏ　（Ｔｒｉｐｈｅｎｙｌｐｈｏｓｐ...     

Study on the Synergistic Extraction of Ytterbium with 1－Phenyl－3－Methyl－4－（α－Furoyl）－5－Pyrazolone and Neutral Extractant

ＳｔｕｄｙｏｎｔｈｅＳｙｎｅｒｇｉｓｔｉｃＥｘｔｒａｃｔｉｏｎｏｆＹｔｔｅｒｂｉｕｍｗｉｔｈ１－Ｐｈｅｎｙｌ－３－Ｍｅｔｈｙｌ－４－（α－Ｆｕｒｏｙｌ）－５－ＰｙｒａｚｏｌｏｎｅａｎｄＮｅｕｔｒａｌＥｘｔｒａｃｔａｎｔ￥ＤｉｎｇＺｈｏｎｇ－Ｔａｏ；Ｌ...     

Crystal Structure and Raman Spectrum of Neodymium（Ⅲ） Complex of p－Aminobenzoic Acid and 1，10－Phenanthroline

ＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅａｎｄＲａｍａｎＳｐｅｃｔｒｕｍｏｆＮｅｏｄｙｍｉｕｍ（Ⅲ）Ｃｏｍｐｌｅｘｏｆｐ－ＡｍｉｎｏｂｅｎｚｏｉｃＡｃｉｄａｎｄ１，１０－ＰｈｅｎａｎｔｈｒｏｌｉｎｅＺｈｅｎｇＸｉａｏ－Ｍｅｉ（郑晓梅）；ＪｉｎＬｉｎ－Ｐｅｉ（...     

Separation of Th~(4 ) and RE~(3 ) with Hollow Fiber Extraction

Ｔｈｏｒｉｕｍｉｓａｍａｉｎｓｏｕｒｃｅｏｆｒａｄｉｏａｃｔｉｖｉｔｙｉｎｔｈｅｒａｒｅｅａｒｔｈｍｉｎｅｒａｌｓ．Ｔｈｅｔｒａｄｉｔｉｏｎａｌｐｒｏｃｅｓｔｏｒｅｍｏｖｅｔｈｏｒｉｕｍｃｏｎｓｉｓｔｓｏｆｓｅｖｅｒａｌｓｔｅｐｓｉｎｃｌｕｄｉｎｇ...     

New Environment-Friendly Approach for Bastnasite Metallurgic Treatment （Ⅰ）： Extraction of Tetravalent Cerium from Sulphuric Acid Medium with Di（2-ethylhexyl） Phosphoric Acid

The extraction of cerium （Ⅳ) from sulphuric acid medium with Di(2-ethylhexyl) phosphoric acid (DEHPA) was studied. The influence of sulphate ion, acidity, extractant concentration as well as the presence of fluoride ion on the extraction of Ce(Ⅳ) was investigated, and the extraction mechanism was also discussed. The results show that sulphate ion can inhibit the extraction of Ce(Ⅳ) significantly due to its complexation with Ce(Ⅳ). Fluoride ion can enhance Ce(Ⅳ) extraction dramatically by the formation of CeF2^2 and less amount of CeF^3 which can almost be extracted completely. Nevertheless, in the case as F/Ce(mole ratio) in the initial aqueous phase is approximately more than 1.5, the precipitate will be formed and the extraction can not be progressed smoothly.     

Transport Behaviour of La~（3＋） with Flat－Sheet－Sandwich Supported Liquid Membrane Extraction System

ＴｒａｎｓｐｏｒｔＢｅｈａｖｉｏｕｒｏｆ Ｌａ~（３＋） ｗｉｔｈ Ｆｌａｔ－Ｓｈｅｅｔ－ＳａｎｄｗｉｃｈＳｕｐｐｏｒｔｅｄ ＬｉｑｕｉｄＭｅｍｂｒａｎｅＥｘｔｒａｃｔｉｏｎＳｙｓｔｅｍＹｉＴａｏ（易涛）；ＹａｎＣｈｕｎｈｕａ（严纯华）；ＬｉＢｉａｏｇｕ?..     

ABSTRACTS──From the Journal of Iron and Steel Research（in Chinese） 1996，8（1）──1996，8（3）

ＡＢＳＴＲＡＣＴＳ──ＦｒｏｍｔｈｅＪｏｕｒｎａｌｏｆＩｒｏｎａｎｄＳｔｅｅｌＲｅｓｅａｒｃｈ（ｉｎ　Ｃｈｉｎｅｓｅ）１９９６，８（１）──１９９６，８（３）ＮｕｍｅｒｉｃａｌＳｉｍｕｌａｔｉｏｎｏｆＰｕｌｖｅｒｉｚｅｄＣｏａｌＣｏｍｂｕｓｔｉｏｎｉ...     

Extraction and separation of thorium and rare earths with 5,11,17,23-tetra （diethoxyphosphoryl）-25,26,27,28-tetraacetoxycalix[4] arene

A calixarene derivative, 5,11,17,23-tetra(diethoxyphosphoryl)-25,26,27,28-tetraacetoxycalix[4]arene (L), was studied for the extraction and separation of thorium and rare earths in nitrate medium. Thorium was extracted into the organic phase by a complex of Th(NO3 ) 4 ·L with the logarithm of the equilibrium constant of 2.77. Thermodynamic functions, ΔH, ΔG and ΔS were calculated to be-2.49,-15.55 kJ/mol and 44.53 J/(mol·K), respectively. The results indicated that this calixarene derivative might be used to separate thorium from rare earths and the separation factors were larger than 26. However, the salting-out agents affected the separation.     

Synthesis and Characterization of Eu（ Ⅲ ） Quaternary Complex with 2,2-Dihydroxymethyl Propionic Acid

A new quaternary complex with 2, 2-dihydroxymethyl propionic acid and 1, 10-phenanthroline, Eu(CH3C (CH2OH)2CO0) (NO3)2 (phen), was synthesized in ethanolelemental analysis, IR and solid-state ^13C NMR. The result of molar electro conductivity of complex indicates that it is non-electrolyte. Solution properties and UV spectra of complex further verify that the complex is different from that of ligants. In addition, the analytical results also imply that the two hydroxyl groups of 2,2-dihydroxvmethvl propionic acid are not involved in the coordinate reaction.     

Separation of Tb~(3 ) , Dy~(3 ) , Ho~(3 ) , Er~( 3 ) with Solvent Impregnated Resins Containing Di-(2,4,4-trimethylpentyl) Phosphinic Acid

Separation of Tb~(3 ) , Dy~(3 ) , Ho~(3 ) , Er~( 3 ) with Solvent Impregnated Resins Containing Di-(2,4,4-trimethylpentyl) Phosphinic Acid     

2—（5—羧基—1,3,4—三氮唑偶氮）—5—二乙氨基酚与铁显色反应的研究

研究了新显色剂２-（５-羧基-１,３．４-三氮唑偶氮）-５-二乙氨基酚（ＣＦＺＡＰＮ）与Ｆｅ３＋的显色反应的条件．结果表明,Ｆｅ３＋在ｐＨ７．０的ＮＨ４ＡＣ缓冲溶液中与ＣＴＺＡＰＮ形成稳定的组成比为１：３的紫色络合物,５７０ｎｍ,试剂的对比度,其表观摩尔吸光系数范围内服从比尔定律,所拟方法用于纯铝和铝合金样品中微量铁的测定,结果满意．     

Extraction and Separation of Thorium and Ytterbium with Bis(2,4,4-Trimethylpentyl) Phosphinic Acid Using a Hollow Fiber Membrane Extractor

Ｔｈｅｅｘｔｒａｃｔｉｏｎｔｅｃｈｎｏｌｏｇｙｏｆｈｏｌｌｏｗｆｉｂｂｅｒｍｅｍｂｒａｎｅ (ＨＦＭ)ｉｓａｎｅｗｋｉｎｄｏｆｓｅｐａｒａｔｉｏｎｍｅｔｈｏｄｃｏｍｂｉｎｉｎｇｐｒｏｃｅｓｓｅｓｏｆｌｉｑｕｉｄ ｌｉｑｕｉｄａｎｄｍｅｍｂｒａｎｅｅｘｔｒａｃｔｉｏｎ ,ｗｈｉｃｈｈａｓｓｅｖｅｒａｌａｄｖａｎｔａｇｅｓｏｖｅｒｃｏｎｖｅｎｔｉｏｎａｌｅｘｔｒａｃｔｏｒｓ[1,2 ] ,ｅ .ｇ .,ａｖｅｒｙｈｉｇｈｉｎｔｅｒｆａｃｉａｌａｒｅａｐｅｒｕｎｉｔｅｘ ｔｒａｃｔｏｒｖｏｌｕｍｅａｎｄｎｏｐｒｏｂｌｅｍ…     

1-（4-安替比林）-3-（对苯磺酸）三氮烯光度法测定废水中镉(Ⅱ)

探讨了1-（4-安替比林）-3-（对苯磺酸）三氮烯(ASTA)与镉的反应,建立了直接测定废水中镉的光度分析方法。试验表明,在硼砂－氢氧化钠介质中,镉与ASTA形成1∶2的红色络合物,该络合物的最大吸收峰位于505 nm,表观摩尔吸光系数为2.7×10⁵ L·mol^-1·cm^-1。10 mL溶液中,镉量在0.3～5.0 μg之间符合比尔定律,检出限为0.1 mg/L。方法已用于电镀废水样中镉的测定,结果与原子吸收光谱法相一致,方法的回收率在104%～105%之间,相对标准偏差(n=6)小于3.9%。     

新试剂1-(4-安替比林)-3-(对苯甲酸)-三氮烯的合成及其应用研究

以4-氨基安替比林和对氨基苯甲酸为原料,经重氮化和偶联两步反应合成了一个新的三氮烯类显色剂:1-(4-安替比林)-3-(对苯甲酸)-三氮烯(ABTA),并用红外光谱和元素分析对其结构进行了表征.同时,研究了新试剂与Pd(Ⅱ)的显色反应条件,建立了一个测定钯的光度分析新方法.在最佳实验条件下,Pd(Ⅱ)的质量浓度在0.25～2.8μg/ml范围内符合比尔定律, 其摩尔吸光系数ε=2.87×104 L/(mol·cm),大量常见离子对Pd(Ⅱ)的测定不干扰.该方法用于催化剂样品中钯的测定,结果令人满意.     

On the Rare Earth Chelates of(1'-Phenyl-3'-Methyl-5'-Pyrazolone-4')-Carbonylmethanoic Acid and 1,10-Phenanthroline

Some rare earth chelates of(1'-phenyl-3'-methyl-5'-phrazolone-4')-carbonylmethanoic acid and 1,10-phenanthroline have been synthesized.The composition of the complexes were confirmed by elemental analy.sis.The molar conductance,IR,~4H-NMR,electronic spectra and thermogravimetric analysis of the chelateshave been measured and discussed.     

1-吡啶-3-[4-(苯基偶氮)苯基]-三氮烯与汞的显色反应及其应用

在Triton X-100存在下的pH 10的Na2B4O7-NaOH缓冲介质中,研究了1-吡淀-3-[4-(苯基偶氮)苯基]-三氮烯(PYPAPT)与汞离子(Hg2 )的显色反应,建立了微量汞的测定方法。Hg2 与PYPAPT形成1∶2的红色络合物,络合物最大吸收波长位于518 nm,表观摩尔吸光系数为1.42×105L.mol-1.cm-1,Hg2 质量浓度在0~0.64 mg/L范围内符合比尔定律。方法用于铅锌矿样中微量汞的测定,RSD小于2.6%,测定结果与AAS法相符。     

1-(4-硝基苯基)-3-(3,5-二溴吡啶)三氮烯的合成及其与铜的显色反应

合成了显色剂1-(4-硝基苯基)-3-(3,5-二溴吡啶)三氮烯(NPDBPDT),并研究了其与铜的显色反应。在pH11.0的Na2B4O7-NaOH缓冲溶液介质中,表面活性剂OP存在下,铜与NPDBPDT生成组成比为1∶4的络合物。该络合物在460nm处有最大正吸收峰,540nm处有最大负吸收峰,以540nm为参比波长,460nm为测量波长进行双波长测定络合物的吸光度。体系表观摩尔吸光系数为2.02×105L.mol-1.cm-1,铜量在8～480μg/L范围内符合比尔定律,方法检出限为7.43×10-9g/mL。所拟方法用于铜矿和铝合金样品中铜的测定,结果与原子吸收光谱法相吻合,相对标准偏差分别为1.63%和1·56%。     

4-(2-噻唑偶氮)连苯三酚光度法测定钢样中钛(Ⅳ)

在溴化十六烷基三甲基铵存在下,用分光光度法研究了4-(2-噻唑偶氮)连苯三酚与钛(Ⅳ)的显色反应性能。结果表明:在pH 2.0~5.0氯乙酸-氯乙酸钠缓冲溶液条件下,4-(2-噻唑偶氮)连苯三酚与钛(Ⅳ)形成摩尔比为2∶1的红色络合物,其最大吸收波长λmax为560 nm,在25 mL显色液中钛量在0~20μg范围内服从比尔定律,相关系数r=0.999 0,测定的表观摩尔吸光系数ε560=4.07×104L.mol-1.cm-1,方法成功应用于钢样品中微量钛的测定,结果同认定值相符。     

1，8－双－（1＇－苯基－3＇－甲基－5＇－氧代吡唑－4＇－基）－3，6－二氧杂辛二酮－［1，8］稀土配合物的合成与表征

在乙醇溶液中合成了７种１，８—双—（１＇苯基—３＇—甲基—５＇—氧代吡唑—４＇—基）—３，６—二氧杂辛二酮—［１，８］，（简作Ｈ２Ｌ）稀土配合物。元素分析确定其组成为ＲＥ２Ｌ３·ｎＨ２Ｏ。通过电子光谱、红外光谱、核磁共振谱、热谱、荧光光谱、摩尔电导等进行了表征。