Degradation of Lix984N and its effect on interfacial emulsion

1 INTRODUCTION Interfacial cruds are supposed to be one of the commonest and most troublesome problems emerging out in practice of copper solvent extraction. Generally, interfacial cruds are inhomogeneous oil/water emulsions that consist of organic phase, aqueous phase and solid particles. It can lead to a lot of detrimental effects on plant operations including difficult phase disengagement, contaminated electrolytes, extractant loss, declined product quality and polluted environment. Lo…     

用溶剂萃取法从氧化锌矿浸出渣中回收锌

低品位氧化锌矿酸浸后，浸出渣中夹带3％以上的锌，采用水洗-P204萃取可回收酸浸渣中的水溶性锌，得到的反萃液经过净化后可电积沉锌。该工艺可与湿法炼锌工艺相结合处理低品位氧化锌矿。     

用羧酸和脂肪族羟基肟协同萃取体系溶剂萃取镍和钴

Chu Yong Cheng用Versatic10酸和LIX63及改性剂TBP确定了金属萃取pH等温线及萃取、反萃取动力学，试图开发出一种从浸出液中分离、纯化和回收镍和钴的协同溶剂萃取体系。     

Effect of the Structure of Cations and Anions of Ionic Liquids on Separation of Aromatics from Hydrocarbon Mixtures

1. Introduction Benzene is a key chemical in the chemical industry, used as the raw material for producing polymer precursors, solvents, dyes, drugs, herbicides, and so on. The world production of benzene is more than 2.0×107 tons/year (Vervalin, 1991; Weissermel and Arpe, 1993; Villaluenga and Tabe-Mohammadi, 2000). Before World War II, benzene was mainly produced from coal, but nowadays more than 90% is obtained from petroleum, mainly from catalytic reformates and FCC gasoline, and by …     

硝酸溶液中锯的溶剂萃取研究——Ⅱ.丁基磷酸及混合丁基磷酸酯萃取铌

前言在核燃料后处理工艺中,对铌的过程化学研究很少。本文在资料[1]的基础上,探讨了DBP、MRP及其与TBP的混合溶剂萃取铌的行为。发现TBP和DBP混合萃取铌,有反协同效应。对DBP-正十二烷萃取铌,D_(Nb)随接触时间延长而下降的现象作了解释。     

镍电解液用P204萃取除铜

以P204为萃取剂,从镍电解液中萃取除铜。研究了pH、相比(O/A)、P204体积浓度和振荡时间对萃取效果的影响,确定了P204萃取铜的最佳条件。结果表明:随着pH的升高,铜的萃取率增大;相比(O/A)越大萃取分离效果越好;随着P204体积浓度的升高,铜萃取率也相应的升高。室温下P204萃取铜的最佳工艺条件:P204的体积浓度15%,相比(O/A)1∶2,水相初始pH2.0,振荡时间3 min。在此最佳条件下,待处理液的一级萃取率达81.33%。反萃实验中反萃率可达84.97%。     

溶剂萃取-传统湿法炼锌工艺联合处理氧化锌矿

高杂质、低品位锌的氧化矿物经硫酸浸出后采用溶剂萃取-传统湿法工艺进行处理,湿法炼锌的原料拓展至低品位氧化矿和含杂质高的复杂矿物以及再生资源。该技术也可从含锌废水中回收锌。     

加速溶剂萃取气相色谱-质谱法检测土壤中双酚A

建立加速溶剂萃取后利用气相色谱-质谱法测定土壤中双酚A的检测方法。样品前处理采用加速溶剂萃取,经硅胶柱净化,以HP-5MS色谱柱,采用气相色谱-质谱联用全扫描和选择离子扫描进行分析。结果表明:双酚A在0.1~10.0 mg/L的质量浓度范围内,线性良好,相关系数为0.999 3;方法检出限为0.01 mg/kg(S/N=3)。在0.1,1.0,10 mg/kg这3个加标水平下,样品的平均回收率为82.5%~101.7%,相对标准偏差(RSD)≤3.3%。该方法简便快速,灵敏度及准确度高,可用于土壤中双酚A的分析测定。