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extraction reaction
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  萃取反应
     (3) The extraction reaction: Te~(4+) + H~+ + Cl_5~-?
     (3)萃取反应为: Te~(4+)+H~++Cl_5~-?
短句来源
     The influences of the concentration of TBP on the extraction of Np(Ⅳ,Ⅴ,Ⅵ) are studied, The extraction reaction equations of them and the corresponding apparent equilibrium constants at temperature of 25 ℃ are as follows: Np 4+ +4NO - 3+2TBPNp(NO 3) 4·2TBP, K ex (Np(Ⅳ))=0.705 mol -6 ·L 6;
     2 5℃下 ,Np(Ⅳ ,Ⅴ ,Ⅵ )的萃取反应方程及表观平衡常数分别为 :Np4 ++4NO- 3 +2TBPNp(NO3) 4 ·2TBP ,Kex(Np(Ⅳ ) ) =0 .70 5mol- 6·L6;
短句来源
     Studies of Extraction Mechanism of Rare Earth Elements with 2-Ethylhexylphosphonic Acid Mono-2-ethylhexyl Ester Ⅲ. The Distribution of High Aqueous Ln (Ⅲ) Concentrations in the System H+(HNO_3, HCl)-H_2O-HEH(EHP)-Kerosene and Extraction Reaction
     2-乙基己基膦酸单(2-乙基己基)酯萃取稀土元素机理的研究 III.高浓度稀土元素(III)在H~+(HNO_3,HCl)-H_2O-HEH(EHP)-煤油体系中的分配及萃取反应
短句来源
     The composition of the extracted complex is (N_(503)H)_2CdCl_4. The extraction reaction is exothermic.
     其萃取机理属离子缔合萃取,萃合物的组成为(N_(503)H)_2CdCl_4。 萃取反应是放热反应。
短句来源
     Thermodynamics process of extraction was assumed as macro-process, The extraction reaction enthalpy of three system P204, TOA TBP were respectively -9.20kJ/moh -5.57kJ/moK -3.47kJ/mol;
     将萃取热力学过程设想为一宏观过程,计算出P2O4、TOA、TBP三种体系的萃取反应热分别为-9.20kJ/mol、-5.57kJ/mol、-3.47kJ/mol,萃取反应均为放热过程;
短句来源
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  萃取反应的
     With the aid of Clausius-Clapeyron equation the enthalpy of the extraction reaction has been determined as ΔH=-4.0 Kcal/mole.
     根据Clausius-Clapeyron方程测得萃取反应的焓变⊿H=-4.0千卡/克分子。
短句来源
     It indicates that the extraction reaction of tetravalent neptunium is an endothermic reaction, and the free energy at 25 ℃ as well as the variety enthalpy is found to be -2.37 kJ/mol and 1.18 kJ/mol, respectively.
     考察了温度对Np(Ⅳ )萃取分配的影响 ,该反应为吸热反应 ,反应的焓变ΔH =1 18kJ/mol,2 5℃下萃取反应的自由能ΔG =- 2 37kJ/mol。
短句来源
     The equilibrium constants of extraction reaction are calculated.
     分别计算了各萃取反应的平衡常数,简单探讨了协萃反应的机理.
短句来源
     The enthalpy change in complex extraction reaction is 2.26kJ/mol.
     NB萃取关键杂质精制对氨基苯酚为一吸热反应,萃取反应的热效应为2.26kJ/mol。
短句来源
     The value of ΔH~0, ΔS~0, ΔG~0, and lg K_(ex) were estimated. The result demonstrated that the extraction reaction was an exothermic reaction.
     并根据分配比与温度的关系求出了萃取反应的ΔH0 、ΔS0 、ΔG0 和lgKex值 ,该萃取反应为放热反应。
短句来源
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  “extraction reaction”译为未确定词的双语例句
     The enthalpy of the extraction reaction was calculated to be ΔH~(0)=-42.59 kJ/mol based on the Van′t Hoff equation.
     根据Van′tHoff方程计算出ΔH0=-42.59kJ/mol。
短句来源
     The composition of the extraction complex and the extraction mechanism are also examined. The extraction reaction is 2NO - 3+Sr 2+ + i S oSr(NO 3) 2· i S o, i =3 for TBOPDA and TiBOPDA, i =2.5 for TBDOODA.
     萃取反应式为 :2NO3- +Sr2 ++iSoSr(NO3) 2 ·iSo(S代表萃取剂 ) ,对TBOPDA和TiBOPDA ,i=3; 对TBDOODA ,i=2 5。
短句来源
     Therefore DEHSO exhibits a higher U-Th separation factor than TBP. The extraction reaction for U(Ⅵ) and Th(Ⅳ) is exoergic and the compositions of extracted species are UO2(NO3)2 2DEHSO and Th(NO3)4 2DEHSO.
     DEHSO与U、Th和HNO_3形成的萃合物为UO_2(NO_3)_2·2DEHSO,Th(NO_3)_4·2DEHSO和HNO_3·DEHSO。
短句来源
     The tetravalent neptunium is extracted by means of Np(NO 3) 4 ·2TBP, and the equilibrium constant of the extraction reaction at 25 ℃ is obtained as 2.60 mol -6 ·L 6. The influence of temperature on the extraction of tetravalent neptunium is also investigated.
     考察了TBP浓度对Np (Ⅳ )萃取的影响 ,Np (Ⅳ )以Np(NO3) 4 ·2TBP形式被萃入有机相 ,2 5℃下TBP萃取Np (Ⅳ )的反应平衡常数Kex =2 60mol- 6·L6。
短句来源
     he extraction behavior of Tc(Ⅶ) by TRPOkerosene from nitric acid solution is studied. The extraction reaction is H++TcO-4+2TRPOHTcO_4·2TRPO.
     研究了用三烷基氧膦(TRPO)-煤油溶液从硝酸体系中萃取Tc(Ⅶ)的行为和机理,TRPO萃取Tc(Ⅶ)的反应式为:H++TcO-4+2TRPOHTcO4·2TRPO。
短句来源
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  extraction reaction
The kinetics of the chromium extraction reaction resulting from the residue of the soda-ash roasting process under an oxidizing atmosphere is also investigated.
      
Results show an exothermic extraction reaction with a distribution factor that decreases with the increase of the temperature and increases with the increase of the acidity and the TBP concentration.
      
The stoichiometric factor of water in the extraction reaction is found to be 4 by determining the activities of water and free chloride ions at various CaCl2 concentrations.
      
The predictive model makes use of the aqueous phase cupric sulfate complex stoichiometric stability constant expressed as its degree of formation, their extraction mechanism, and the equilibrium constant for the extraction reaction.
      
The predictive model makes use of the aqueous phase cupric sulfate complex stoichiometric stability constant expressed as its degree of formation, their extraction mechanism, and the equilibrium constant for the extraction reaction.
      
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The results obtained from the spectraphotometric determinationof the complex of Tecl_5~- and butylrhodamine B with TBP—C_6H_6solution extraction are recommended as follows: (1) The concentration of hydrochloric acid is 4—6 N and butyl-rhodamml B (0.5%) 4 — 6ml. The absorbance of the organic layer ismeasured at 540nm using a reagent blank as a reference. (2) The molar extinction coefficient of the complex is 6.4×10~4,the ion - pair complex of compositon is Tecl_5~-·R~+. (3) The extraction reaction: Te~(4+)...

The results obtained from the spectraphotometric determinationof the complex of Tecl_5~- and butylrhodamine B with TBP—C_6H_6solution extraction are recommended as follows: (1) The concentration of hydrochloric acid is 4—6 N and butyl-rhodamml B (0.5%) 4 — 6ml. The absorbance of the organic layer ismeasured at 540nm using a reagent blank as a reference. (2) The molar extinction coefficient of the complex is 6.4×10~4,the ion - pair complex of compositon is Tecl_5~-·R~+. (3) The extraction reaction: Te~(4+) + H~+ + Cl_5~-?HTeCl_5 TeCl_5~- + R + ? [TeCl_5~-·R+] The exrtaction equilibrium constant is 1×10~5. (4) The effects of a number of foreign ions have been studied andseveral can be tolerated to an appreciable extent. The method hasbeen successfully applied to the determination of Te in SeO_2.

介绍用TBP——苯溶液萃取光度测定Tecl_5~-与丁基罗丹明B终合物的如下结果: (1)盐酸浓度为4——6N,丁基罗丹明B(0.5%)4——6mI以试剂空白为参比在540nm处测量有机层的吸收。 (2)络合物克分子吸光系数为6.4×10~4,离子对络合物组成为Tecl_5~-.R~+。 (3)萃取反应为: Te~(4+)+H~++Cl_5~-?MHTeCl_5 TeCl_5~-+R+?[TeCl_5~-.R~+]萃取平衡常数为1×10~5. (4)研究了干扰离子的影响及其允许量;该方法已成功地用于二氧化硒中碲的分 离和测定。

This article deals with the behaviour and mechanism of extracting the rare earths from aqueous hydrochloride acid hy means of mixed system of naphthenic acid (HA)and N, N—Di—(1—methylheptyl) acetamide(N-503). Changing the concentration of HA or N-503, respectively, affects the pH_(0.5) values on lanthanum. Under the constant condition of [HA] and [N-503], the extraction curves of PH—E% for 14 elements of rare earth and the figure of LogD—Z(atomic number)are made. It also talks about the measurement of the compositon...

This article deals with the behaviour and mechanism of extracting the rare earths from aqueous hydrochloride acid hy means of mixed system of naphthenic acid (HA)and N, N—Di—(1—methylheptyl) acetamide(N-503). Changing the concentration of HA or N-503, respectively, affects the pH_(0.5) values on lanthanum. Under the constant condition of [HA] and [N-503], the extraction curves of PH—E% for 14 elements of rare earth and the figure of LogD—Z(atomic number)are made. It also talks about the measurement of the compositon of the extraction compound and of thermodynamic effects of extraction reaction for Y, Nd and Dy.

本文研究了RE~(3+)/HCI—H_2O/HA—N5O3-磺化煤油体系对于14个稀土元素的萃取行为,绘制了它们的PH—E%的萃取曲线和LogD—Z(原子序数)的图象(为倒W型)。测定了在分别改变环烷酸(HA)浓度与N,N—二(1——甲基庚基)乙酰胺(N—503)浓度的情况下对于(钅兰)的pH_(1/2)值的影响。还测定了个别稀土元素在该体系中的萃合物组成和萃合热效应。

N, N-Di-sec-octylacotamide (DOAA) possesses notable properties in extraction of phenols. This paper describes a study on the mechanism of the extraction of phenol by a solution of DOAA in dodecane or kerosene.The isotherms of the extraction equilibrium have been given and the constants in the equation Y = aX~b thereby calculated (X and Y denote the concentration of phenol in aqueous and organic phase respectively). The distribution ratio of phenol is shown to be as high as 400 in the extraction by pure DOAA....

N, N-Di-sec-octylacotamide (DOAA) possesses notable properties in extraction of phenols. This paper describes a study on the mechanism of the extraction of phenol by a solution of DOAA in dodecane or kerosene.The isotherms of the extraction equilibrium have been given and the constants in the equation Y = aX~b thereby calculated (X and Y denote the concentration of phenol in aqueous and organic phase respectively). The distribution ratio of phenol is shown to be as high as 400 in the extraction by pure DOAA. With the aid of Clausius-Clapeyron equation the enthalpy of the extraction reaction has been determined as ΔH=-4.0 Kcal/mole. By means of the slope method and the method of continuous variations, the composition of the extracted species is deduced to be C_6H_5OH·DOAA. A marked carbonyl shift was observed in the infrared spectra of the loaded organic phases. It is a consequence of the coordination effect during the process of extraction. As indicated by the NMR spectrum the value of the chemical shift of the hydroxyl proton in phenol was increased significantly in the extracted complex resulting from the effect of the intermolecular hydrogen bonding. The structure of the extracted species may thus be deduced as C_6H_5O—(sec—C_8H_(17))_2.

N,N-二仲辛基乙酰胺(DOAA)是一种新型萃取剂,它对苯酚有良好的萃取性能。本文系报道DOAA从水溶液中萃取苯酚机理的研究。测得DOAA萃取苯酚的等温线,计算了方程Y=aX~b中的常数(X和Y分别代表水相和有机相中苯酚的浓度)。DOAA萃取苯酚的分配比高达400以上。根据Clausius-Clapeyron方程测得萃取反应的焓变⊿H=-4.0千卡/克分子。采用双对数斜率法和连续变量法测得萃合物的组成为C_6H_5OH·DOAA。从负荷有机相的红外光谱观察到DOAA的羰基吸收峰移向低波数,说明DOAA羰基氧原子的缔合;同时从核磁共振谱观察到苯酚羟基的质子位移由于氢键缔合移向低场处。因此可以认为萃合物的结构为:C_6H_5O—H…O=(?)—H(secC_8H_(17))_2。

 
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