A new process of extraction distillation with salt was developed for the triple azeotropic system of methyl acetate - ethanol - water and the selective method of the solvent and salt were studied 本文针对乙酸甲酯?乙醇?水三元共沸体系，提出了加盐萃取精馏的工艺过程，并对盐的选择和萃取剂的选择方法进行了研究。
The optimum method of tta extraction : the extracting agent cocentration is 0 . 5mol / l , the diluent is xylene , the extracting media is nitric acid , its concentration is 4mol / l , the extracting time is lomin Tta萃取分离的最佳分离方案：萃取剂浓度为0 . 5mol / l ，稀释剂采用二甲苯，采用4mol / l的硝酸做为萃取介质，每次萃取时间为10min 。
The analytical method for five pesticide residues of pyrethroid , such as fenpropathrin , cypermethrin , fenvalerate , deltamethrin and bifenthrin in potable water and source water determination by capillary gas chromatography at the same time , with n - hexane for extracting agent 摘要以正己烷为萃取剂，采用毛细管气相色谱法同时测定生活饮用水及水源水中甲氰菊酯、氯氰菊酯、氰戊菊酯、溴氰菊酯和联苯菊酯五种拟除虫酯类农药残留量。
Abstract : technical progress of uranium extraction in recent years is introduced , including new processes such as uranium extraction by supercritical co2 fluid , calixarene , capillary electrophoresis , oscillation ; application of novel extractants and absorbents ; and three wastes disposal 文摘:介绍了近年来铀提取方面的技术进展，包括提铀新工艺:超临界co2流体提取铀,杯芳烃提铀,毛细管电泳分离铀,振荡法萃取铀；各国新型萃取剂和吸附剂的应用及三废治理。
In addition , the extractive distillation process with mixed solvents have a better performance and a wider use compared with that with single solvent in the same condition , and it can not only overcome conflict of single solvent ' s selectivity and solubility , but also not increase the complexity of original technology 另外，混合溶剂萃取精馏过程与简单溶剂萃取精馏过程相比，克服了简单萃取剂自身选择性与溶解性之间的矛盾，提升了萃取精馏工艺的分离效果及使用范围，并且没有增加原有工艺过程的复杂性。
Under the appropriate conditions of sampling equipment of gas chromatographic headspace analysis , determine a suitable salt and a suitable extracting solvent by the orthogonal design method , then determine the fitting feed composition of ethanol - water mixture , the fitting distribution between extracting solvent and mixture , and the fitting salt concentration by the uniform design method 在对建立的顶空气相色谱采样装置的操作条件进行优化之后，先用正交试验设计法确定非连续性因素盐和萃取剂及其在备选水平中的适宜水平，再用均匀试验设计确定连续性因素乙醇的进料浓度、萃取剂配比和加盐量及其备选水平中适宜的水平范围。
The path - way controlling of neptunium in co - decontamination step of purex process , the extraction thermodynamics of amido podand and its usage in recovery of actinides from simulated hllw have been investigated . more than 95 % np were maintained in np ( v ) in 1a extractor and flowed into 1 aw , if enough amount of hno2 was added in feed adjustment and then hno2 scavenger ( urea ) was added before extraction . three kinds of amido podand were synthesized , and the extraction of lanthanides , actinides and some fission products were studied . one of them ( tbopda , n , n , n ' , n " - tetrabutyl - 3 - oxa - pantenadiamide ) was used as extractant to recover actinides from hllw . the results of experiments show that more than 99 . 99 % actinides were recovered from hllw and separated basically in groups . the main digests are as follows : 1 镎走向控制研究中通过调价阶段加入亚硝酸、而萃取前清除亚硝酸的独特办法可以将大于95的镎赶入1aw 。合成了三种酰胺荚醚萃取剂，研究了它们对锕系和裂片元素的萃取热力学，通过条件实验选择了其中一种荚醚tbopda ( n ， n ， n ’ ， n ’ ?四丁基? 3 ?氧戊二酰胺) ，进行了从模拟高放废液中分离锕镧系元素的工艺研究，锕系的回收率大于99 . 99 ，并且基本上实现了锕镧元素的组分离。其要点如下： 1
Glycol was the fit solvent . one set of extractive experiment equipment with continuously feed was designed and established to validate the extractive distillation and extractive distillation with salt . good results of the two technology processes and the extractive solvent recycling experiment were gained respectively 本文还设计安装了一套实验室连续进料萃取装置进行工艺的验证实验，对萃取精馏和加盐萃取精馏工艺流程分别进行了验证，并对萃取剂的回收利用进行了实验，取得了良好的效果。
Finally glycyrrhiza as the raw material were extracted by the aqueous two - phase . the influences of the extraction time , temperature , the extractant ration ( filtrate / extractant ) , quantity ration were studied . the optimum condition was also determined 最后以甘草为原料，用双水相萃取技术提取甘草酸，对于不同分子量的聚乙二醇peg ，考察了提取时间、温度、萃取剂比例(滤液萃取剂)和双水相组分比聚乙二醇与硫酸铵质量比[ peg ( nh ) 4so4 ]对萃取量的影响，从而确定它们的最佳工艺条件。
