N,N′-乙撑双(硬脂酰胺)

分了C:7H。。一e一NH一CH:CH:一NH一C一Ci:Ha。 C:.H,eN,O: 分子量593 l英文名IN,N‘一Ethylene bis(s-tearanl记e) l国外商品名1 Chemetronwa、一100(Chemetron);Armowax EBS(Armak)书H佣ehst WaxC(Hoechst);AerawaxC(Glyeo),Kemam溉w 20(枷mko);Lubro/EA(ICI)。 l性状】白色至淡黄色粉末或粒状物。熔点130一145℃,闪点约285℃,比重0.98。不溶于水,常温下不溶于乙醇、丙酮等大多数溶剂,可溶于混合二甲苯、菇烯、丁醇、甲基溶纤素及大多数氯代烃类。游离脂肪酸含量低于4%,水份低于。.5%。 【制法】乙撑双硬脂酞胺的制备是…     

Extraction of Uranium(VI) and Thorium(IV) from Nitric Acid Solution by N,N,N′,N′ – Tetraoctylglutaricamide

Synthesis and characterization of N,N,N′,N′-tetraoctylglutaricamide (TOGA) was carried out and used for extraction of U(VI) and Th(IV) from nitric acid solutions. The processes of extraction were determined by the slope analysis and by analyzing a function that allows the simultaneous treatment of all the experimental points obtained in different conditions. The different factors affecting the extraction distribution ratio(D) of U(VI) and Th(IV) (extraction concentration, concentrations of nitric acid, salting-out agent NaNO₃ concentration, equilibration time, temperature, and types of diluents) were investigated. The results obtained indicated that the extraction species of U(VI) and Th(IV) are mainly extracted as UO₂(NO₃)₂·1.0TOGA and Th(NO₃)₄·1.5TOGA. The apparent equilibrium constant of U(VI) and Th(IV) extraction determined are 3.35 ± 0.03 L³/mol³ and 1.87 ± 0.01 L⁵/mol⁵ at 298 ± 1 K. Thermodynamic parameters such as the free energy(ΔG), enthalpy(ΔH), and entropy(ΔS) changes associated with the extraction processes could be evaluated. Back-extraction of U(VI) and Th(IV) from organic phases was also studied.     

Determination of N,N’, N’’-tris(3,7-dimethyloctyl)guanidine (TiDG) in Cesium Extraction Solvent

Several analytical methods were evaluated for determining the concentration of N,N’,N”-tris(3,7-dimethyloctyl)guanidine (TiDG) in a cesium extraction solvent. Of the methods evaluated, non-aqueous titration and ¹H NMR were shown to be successful at quantifying the amount of TiDG present in both a pure solvent extraction system, and a blended system containing an additional base, trioctylamine.     

N—甲基吡咯烷酮(purisol)法

<正> 发许可证者 American Lurgi Corporation; 377 Route 17; Hasbrouck Heights, NJ 07604 历史 Purisol法是由西德鲁奇公司开发的,是用N—甲基吡咯烷酮(NMP或M—Pyrol)从天然气、氢气或合成气中藉物理吸收除去酸性气体。一般地这个方法是用于: (1)将高浓度的CO_2降低到一个低的含量。 (2)用一个简单的闪蒸再生塔系统,将酸性组分大部分除去,降到一个适当的含量。 (3)选择性脱除H_2S~5。四个装置正在运转中,处理原料气量总计为420×10~6SCFD,其中两个用于高压     

丁腈橡胶(N41)性能优化探讨

对丁腈橡胶(N41)胶浆凝聚方法、防老剂P82含量、成品中氯化钙含量对丁腈橡胶性能的影响进行了讨论,结果表明在胶浆门尼黏度控制中采用反凝法进行胶浆门尼测试、采用小试组配制P82进行胶浆门尼测试,胶浆门尼与成品门尼能够严格对应;控制橡胶成品中氯化钙的含量能够较好地优化丁腈橡胶的物理性能,且氯化钙在丁腈橡胶中的最佳含量为1000±100 mg/kg。     

Non-Dispersive Solvent Extraction of Neodymium using N,N,N’,N’-Tetraoctyl Diglycolamide (TODGA)

Hollow fiber contactor was used to study non-dispersive extraction (NDSX) of Nd³⁺ ions from aqueous solutions. N,N,N′,N′-tetraoctyl diglycolamide (TODGA) diluted with n-dodecane was used as the organic phase with di-n-hexyl octanamide (DHOA) as the phase modifier. The role of cations (H⁺/Na⁺) on the transport of Nd³⁺ ions has been investigated for this system. It was observed that H⁺ ion has a significant role to play in the Nd³⁺/TODGA complexation reaction. A mathematical model has also been developed to simulate the NDSX process in a hollow fiber contactor. A comparison has also been made between extraction profiles from the NDSX process and the hollow fiber supported liquid membrane (HFSLM) process. It was observed that NDSX gave comparatively faster rates of extraction in the presence of H⁺ ions but slower in the absence of H⁺ ions.     

N,N,N′,N′-四丁基丁二酰胺萃取Ce(Ⅲ)的研究

合成了新型萃取剂N,N,N′,N′-四丁基丁二酰胺(TBSA),研究了其萃取Ce(Ⅲ)的性能,详细考察了硝酸浓度、萃取剂浓度、硝酸锂浓度以及温度等对萃取分配比的影响,得出了TBSA以甲苯为稀释剂时萃取反应的表观平衡常数为(0.29±0.16)L6/mol6及298K时的热力学焓变为-17.90kJ/mol,并用红外光谱表征了配合物Ce(NO3)3.3TBSA的结构。     

Evaluation of the Hydrophilic Complexant N,N,N’,N’-tetraethyldiglycolamide (TEDGA) and its Methyl-substituted Analogues in the Selective Am(III) Separation

ABSTRACT

N,N,N’,N’-tetraethyldiglycolamide (TEDGA) is used in the French EXAm (extraction of americium) process to separate Am(III) from Cm(III) and Ln(III). In this study, the complexation behavior of TEDGA towards actinides(III) and lanthanides(III) was compared to its methyl-substituted derivatives Me-TEDGA and Me₂-TEDGA under experimental conditions applying to the EXAm process. Using the EXAm solvent, 0.6 mol/L N,N’-dimethyl-N,N’-dioctyl-hexylethoxymalonamide (DMDOHEMA) and 0.45 mol/L bis(2-ethylhexyl)-phosphoric acid (HDEHP), An(III) and Ln(III) distribution ratios increase in the order TEDGA < Me-TEDGA < Me₂-TEDGA. This is explained by differences in the strength of complexation in the aqueous phase: Conditional stability constants for the formation of [Cm(DGA)_x]³⁺ complexes decrease in the order TEDGA > Me-TEDGA > Me₂-TEDGA, as shown by time-resolved laser fluorescence spectroscopy (TRLFS). TRLFS measurements verified the exclusive existence of [Cm(DGA)₃]³⁺ complexes in the aqueous phase. Both the homoleptic [Cm(DMDOHEMA)_n]³⁺ and the heteroleptic [Cm(DGA)_x(DMDOHEMA)_y]³⁺ complexes were detected in the organic phase, as postulated in the literature.^[14]     

N8161 萃取铼(Ⅶ)的热力学

以萃取剂N8161、稀释剂正庚烷研究了萃取铼的热力学. 在N8161 (NH4)ReO4 n C7H16 HCl H2O体系中,在温度278.15~298.15 K和离子强度0.1~2.0 mol/kg范围内,以NH4Cl为支持电解质,在HCl体系中测定了萃取平衡水相中的ReO4 浓度和pH值. 计算了萃取反应的标准平衡常数K0,并得到经验公式logK0 23.0353 4330.282T 1 0.04831T, 同时计算了萃取反应的其它热力学量,指出焓和熵是该萃取过程的推动力.     

Synthesis and Thermal Decomposition Studies of Silicon (IV) Compounds with N,N’-Bis(Salicylidene)Ethylenediimine

The silicon (IV) compounds possessing SiN₄O₂ (6), SiN₂O₂C₂ (7, 8), SiN₂O₂CCl (9) and SiN₄O₄ (10) coordinating frameworks have been synthesized in high yield by the reaction of the O,N,N,O- donor salen-type ligand N,N’-bis(salicylidene)ethylenediimine L with different silanes i.e. diethoxydiisocyanatosilane-(C₂H₅O)₂Si(NCO)₂ 1, dichlorodiphenylsilane-Ph₂SiCl₂ 2, dichloromethyl- phenylsilane-MePhSiCl₂ 3, trichlorophenylsilane-PhSiCl₃ 4 and silicon tetrachloride-SiCl₄ 5. The compounds 6–10 have been characterized by elemental analysis, IR, ¹H, ¹³C and ²⁹Si NMR and mass spectrometry. The decomposition reactivity of these compounds has been studied using a Thermal Gravimetric Analyzer (TGA) at a heating rate of 10°C/minute in an inert atmosphere.     

N—甲基甲酰胺(NMF)的合成

一、概述N——甲基甲酰胺(NMF)曾作为溶剂而有过合成。但随着 N,N——二甲基甲酰胺问世,后者逐渐代替了前者。近年来很少有合成 NMF 的研究报导。在抗癌药物的研究上,近年来国内集中在草及其药剂的研究.     

硝基甲烷-~(15)N的合成

以丰度为98.7 atom%的Na15NO2为同位素原料,与硫酸二甲酯反应合成了硝基甲烷-15N,方法简便,同位素转化率为75%,纯度为98.8%,丰度为98.56 atom%。     

N,N,N′,N′-Tetra(2-Ethylhexyl) Thiodiglycolamide T(2EH)TDGA: A Promising Ligand for Separation and Recovery of Palladium from High Level Liquid Waste (HLLW) Solutions

The extraction properties of N,N,N′,N′-tetra(2-ethylhexyl)thiodiglycolamide T(2EH)TDGA have been evaluated for the separation and recovery of palladium from simulated high-level liquid waste (SHLW). T(2EH)TDGA has shown very high selectivity for Pd (II) over other metal ions present in SHLW. The separation factor (SF) for Pd (II) over other metal ions was found to be more than 10⁵. Reusability studies of the extractant indicate that D_Pd remained almost constant even after five successive cycles of extraction and stripping. Palladium was quantitatively recovered from thiourea strip solution by treating it with ammonia and filtering the precipitate of palladium sulphide. The acid uptake constant (K_H) was found to be 0.62 which could be due to the presence of two carbonyl groups of amidic moiety. To account for very high extractability of palladium with T(2EH)TDGA over other ‘S’ donor extractants, namely Bis-(2-ethylhexyl)sulphoxide (BESO), FTIR, as well as Raman studies were carried out. FTIR and Raman studies suggested the ligation through carbonyl as well as the thio-ether group. Conditional extraction constants (log K′_ex) were determined and the thermodynamic parameters were calculated from the dependence of the conditional extraction constant (log K′_ex) on temperature. The calculated values of ΔG_ex, ΔH_ex, and ΔS_ex were ?41.78 kJmol^?1, ?55.12 kJmol^?1 and ?44.04 JK^?1 mol^?1 respectively. The extraction process is indicated to be enthalpy driven with the entropy factor counteracting it.     

新型环氧树脂N,N′-二(缩水甘油醚)-O-甲苯胺

N,N′-二(缩水甘油醚)-O-甲苯胺,简称 GOT,结构式为(?)鉴于其化学结构是一种芳香族胺的缩水甘油胺,因此,GOT 是一类特殊结构的环氧树脂,在酸、酸酐、多胺、聚酰胺、多元酚等固化剂中,常温或加热固化,便能得到具有优良机械性能、电性能的树脂。GOT 本身又能作其他环氧树脂的稀释剂,特别适宜作     

醋酸乙烯(VAC)—N—羟甲基丙烯酰胺(NMA)共聚乳液

一、前言: 醋酸乙烯均聚乳液具有不易燃烧,不会造成对大气的污染,施工方便,价格低廉等优点,它对木材、纸张、玻璃、陶瓷、织物等材料有良好的粘合力,因而广泛地被用作胶粘剂和制造以水为稀释剂的乳胶漆。但由于聚醋酸乙烯系线型结构的热塑性高聚物,所以它固化后所形成的膜层在耐水和耐热性能方面不能十分令人满意,限制了它的使用范围。为了克服这方面的缺陷,已做了大量的工作。特别是使聚醋酸乙烯分子链间发生交     

Metal binding properties of poly[N,N,N′,N′-tetrakis(2-hydroxypropyl)ethylenediamine methacrylate]

Summary When incorporated into a polymer hydrogel, the metal chelator, N,N,N,N-tetrakis(2-hydroxypropyl)ethylenediamine (THPED), retains its metal binding properties. The resultant poly(THPED methacrylate) homopolymer is a polybase with displacement binding constants for copper (II) and zinc(II) of-3.11 and-6.55, respectively, as compared to values for THPED of-3.83 and-7.44. The chelating capacity of the polymer for various divalent metal ions at pH 5.5 follows the order Cu>Cd>Co>Zn>Mn, while calcium and magnesium do not bind. Metal ion release curves indicate that after 30 hours, Cd(II), Co(II), Zn(II), and Mn(II) are released at a slow, steady rate, while Cu(II) is not released under experimental conditions.     

二步法合成N,N,N′,N′-四(β-羟乙基)己二酰胺

标题化合物("552")是一种新型的粉末涂料固化剂,具有高效、节能、环保的特性.用己二酸二甲酯和二乙醇胺的氨解反应,二步法合成"552",产率86%.具体的条件为:1)n(己二酸二甲酯)∶n(二乙醇胺)=1∶1.1,在甲醇钠和氢氧化钾的催化下,100 ℃反应3 h;2)继续加入二乙醇胺(与己二酸二甲酯的物质的量比为0.95)和甲醇钠,70 ℃反应3 h;总的物质的量比n(己二酸二甲酯)∶n(二乙醇胺)=1∶2.05.探索该反应的过程,分离提纯出中间体并进行 1HNMR 表征,为提高"552"的产率提供理论依据.