共搜索到14条信息，每页显示10条信息，共2页。用时：0小时0分0秒416毫秒
Cyanex272与HEHEHP混合体系萃取分离重稀土的研究 徐廷华1,邓佐国1,刘营2 (1.南方冶金学院材料工程系,江西赣州,341000;2.北京有色金属研究总院,北京,100088) 摘要:选定了HEHEHP与Cyanex272组成混合体系,确定了萃取体系的最佳组成,测定了该体系的萃取容量,反萃酸度以及相邻重稀土元素之间的分离系数,考察了体系萃取性能的主要影响因素. 关键词:Cyanex 272; HEHEHP; 萃取; 重稀土; [全文内容正在添加中] ......
J. Cent. South Univ. (2021) 28: 679-689 DOI: https://doi.org/10.1007/s11771-021-4637-6 Scandium recovery from ion-adsorption rare earth concentrate with HEHEHP as extractant ZHANG Wei(张伟)1, ZHU Hao... in 4 mol/L HCl solution was achieved with the separation factor βSc/REEs over 8000 by 2-ethylhexyl phosphoric acid mono 2-ethylhexyl ester (HEHEHP) and the extraction equilibrium can be obtained......
acid mono-2-ethylhexyl ester(HEHAMP) and 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester(HEHEHP). The maximum synergistic enhancement coefficients(R) of Lu, Yb, Tm, Er, Y and Ho are 2.89, 2.76.../Yb = 1.20). The extracted complex is determined to be RE[H(EHAMP)2][H(EHEHP)2]2 by the slope analysis method. The loading capacities of the mixtures consisting of 15% HEHAMP and 15% HEHEHP for Y and Lu......
acid mono-2-ethylhexyl ester(HEHAMP) and 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester(HEHEHP). The maximum synergistic enhancement coefficients(R) of Lu, Yb, Tm, Er, Y and Ho are 2.89, 2.76.../Yb = 1.20). The extracted complex is determined to be RE[H(EHAMP)2][H(EHEHP)2]2 by the slope analysis method. The loading capacities of the mixtures consisting of 15% HEHAMP and 15% HEHEHP for Y and Lu......
Mathematical Simulation of Nd and Sm Extract Separation in (Nd,Sm)Cl3－HCL－HEHEHP－Kerosene System黄文梅,应娓娟,王乃宾摘 要:ＭａｔｈｅｍａｔｉｃａｌＳｉｍｕｌａｔｉｏｎｏｆＮｄａｎｄＳｍＥｘｔｒａｃｔＳｅｐａｒａｔｉｏｎｉｎ(Ｎｄ,Ｓｍ)Ｃｌ＿３－ＨＣＬ－ＨＥＨＥＨＰ－ＫｅｒｏｓｅｎｅＳｙｓｔｅｍＨｕａｎｇＷｅｎｍｅｉ；ＹｉｎｇＷｅｉｊｕａｎａｎｄＷａｎｇＮａｉｂｉｎ(黄...关键词:......
股份有限公司,北京100088) 摘 要:采用恒摩尔法,斜率法以及饱和容量法研究从硫酸介质中用P204(D2EHPA,用(HA)2表示)与P507(HEHEHP,用(HL)2表示)协同萃取Nd3+或Sm3+的性能与机理,并测定协萃反应的热力学平衡常数Ks.e,求得反应的焓变和熵变.结果表明,萃取反应呈现正协同效应,且协萃过程为放热反应,协萃配合物组成分别为Nd?(HA2)2?HL2和..., Beijing 100088, China; 3. GRIREM Advanced Material Co., Ltd, Beijing 100088, China) Abstract: The mechanism and characteristics about synergistic extraction of Nd3+ and Sm3+ by D2EHPA and HEHEHP from......
HEHEHP-HCl-NaAC体系萃取铥的机制研究王香兰,彭苏武汉生物工程学院化学与环境工程系摘 要:针对工业上广泛应用的氨水皂化HEHEHP[2-乙基己基磷酸单乙基己基脂]萃取剂分离稀土元素产生含有很高浓度NH+4的废水,对环境污染严重的问题,通过在稀土氯化物溶液中加入配合剂醋酸钠(CH3COONa),采用非皂化的HEHEHP萃取剂萃取重稀土元素Tm.研究了该体系中水相酸度,有机相浓度,乙酸钠浓度等因素对Tm3+分配比的影响.结果表明:HEHEHP-HCl-Na AC体系对Tm3+萃取过程遵循阳离子交换机制;萃取液中形成的乙酸-乙酸盐缓冲溶液能够维持萃取水相酸度恒定,萃取过程中有机相不再需要皂化,有效避免HEHEHP皂化产生含NH+4废水污染环境的问题.关键词:HEHEHP-HCl......
Extraction of Metal(Ti,V,Mo)-oxyl Cations by Monoacidic Phosphates and Phosphonates傅洵,傅有君,牛增元,胡正水,辛惠蓁,张雅萍摘 要:<正> The extraction of TiO2+,VO2+,VO2+ and MoO22+by HDEHP,HEHEHP and HDTMPP was studiedrespectively.The orders of extraction ability for the three extractant systems are as follows:for TiO2+,VO2+:HDEHP>HEHEHP>HDTMPP;for VO2+, MoO22......
-(2-ethylhexyl) ester (HEHEHP) combined with [di-(2-ethylhexyl)-phosphoric acid (HDEHP),isopropylphosphonic acid 1-hexyl-4-ethyloctyl ester (HHEOIPP),bis(2,4,4-trimethylpentyl)-phosphinic acid (Cyanex 272... on the extraction was studied. According to the corresponding separation factors for adjacent pairs of rare earths,it could be concluded that HEHEHP and Cyanex 272 could be employed for the separation of Tm......
-(2-ethylhexyl) ester (HEHEHP) combined with [di-(2-ethylhexyl)-phosphoric acid (HDEHP),isopropylphosphonic acid 1-hexyl-4-ethyloctyl ester (HHEOIPP),bis(2,4,4-trimethylpentyl)-phosphinic acid (Cyanex 272... on the extraction was studied. According to the corresponding separation factors for adjacent pairs of rare earths,it could be concluded that HEHEHP and Cyanex 272 could be employed for the separation of Tm......
