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本文分别测定了几种不同类型络合剂的络合能力和分散能力。并且考查了它们的综合效果,即在精练中的作用,发现优秀的格合分散剂在精练中可以起到极佳的助练作用,它可以使精炼后的织物毛效提高,木质素明显减少,有效地提高了精练效果。 相似文献
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选择了15种单一稀释剂和4种混合稀释剂,分别研究它们对异丙氧基杯[4]冠-6的溶解性能和在不同酸度下对异丙氧基杯[4]冠-6萃取铯的影响。研究结果表明:正辛醇、苯甲醇、环己酮、硝基苯基甲基醚做稀释剂时可较好萃取铯离子,萃取体系对于模拟高放废液中其它离子的萃取率很低。 相似文献
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A new stripping agent N, N-dimetbyl-3-oxa-glutaramic Acid (DOGA) was used in TRPO process to simplify the TRPO process. The structures of the complexes of the DOGA with Eu(Ⅲ), Nd(Ⅲ), La(Ⅲ) were characterized with extended X-ray absorption fine structure spectroscopy (EXAFS), infrared spectra (IR) and mass spectra (MS). The molecular formula of the complexes of Eu( Ⅲ ) and Nd( Ⅲ ) is deduced to be M(DOGA)3, and only La( Ⅲ ) can form the complex HM(DOGA)4 under condition of high consistency of the DOGA. The coordination number of Ln( Ⅲ ) in the complexes is 8, and all of coordinated donor atoms are O atoms. For Eu( Ⅲ ), Nd( Ⅲ ), the coordination numbers of O atom in the first coordination shell is 6 and the average coordination bond lengths of Ln - O are 0.240 nm, 0.244 nm respectively,while the numbers of the second O shell are 2.4, and the average coordination bond lengths of Ln - O are 0.260 nm,0. 262 nm. For La( Ⅲ ), the coordination numbers of O atom in the first coordination shell is 6 and the average coordination bond lengths of La - O are 0.258nm, while the number of O atom in the second coordination shell is 4.4, and the average coordination bond length of La - O is 0.28 nm. The results of IR and MS show that there is no water coordinating with Ln( Ⅲ ) in the complexes. 相似文献
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N,N,N′,N′-四异丁基-3-氧杂戊二酰胺对超铀元素和锝的萃取 总被引:1,自引:0,他引:1
研究了N,N,N′,N′-四异丁基-3-氧杂戊二酰胺(TiBOGA)-40%正辛醇/煤油对超铀元素及Tc的萃取,研究结果表明,0.2mol/L,TiBOGA-40%正辛醇/煤油对Tc(Ⅶ),Am(Ⅲ),Np(Ⅳ),Np(Ⅴ),Pu(Ⅲ),Pu(Ⅳ)均有一定萃取能力,在酸度为1mol/L HNO3的模拟料液中,其分配比分别为:2.25,>2000,43,0.734,>2000,34。TiBOGA-40%正辛醇/煤油对各种离子的萃取能力受酸度和盐析剂浓度影响较大,用0.1mol/L HNO3能将除Am(Ⅲ)以外的其它几种离子从有机相中反萃下来。0.6mol/L H2C2O4对超铀元素的反萃效果都很好,经过1次或2次反萃,反萃率均可达99%以上。 相似文献
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研究了乙异羟肟酸(AHA)在TRPO简化流程反萃段的应用。研究结果表明,用0.5mol/L 0AHA水溶液可从30%TRPO/煤油中反萃负载的Am(Ⅲ),Eu(Ⅲ)和Pu(Ⅳ),但U(Ⅵ)不能反萃下来,藉此可以实现U与Am,Pu的分离,但所需的反萃级数较多。另外,由于负载的铁不能完全反萃,会给后续的碳酸铵反萃U(Ⅵ)带来麻烦。因此要将乙异羟肟酸用于TRPO简化流程,还必须解决铁的反萃。 相似文献