反萃取

Continuous multistage counterflow centrifugal dephenol extraction and reextraction regeneration of the extractor were studied and proper operating parameters determined.

在此基础上，进行了多级连续逆流离心萃取脱酚及萃取剂反萃再生的研究，确定了适宜的工艺操作参数。

For lanthanides in Am at pH 2. 7～2. 8. According to empirical distribution ratio model and proposed calculation method, flow sheets are proposed for the separation of Am and fission product lanthanides from power reactor and production reactor waste respectively.

7级萃取、3级洗涤2级反萃的多级逆流分馏萃取实验表明HBTMPDTP-TBP-煤油能够很好地萃取分离镅和镧系元素，在pH值为2.7～2.8时，镧系元素中镅的分离系数大于5×10〓，镅中镧系元素的分离系数大于2.5×10〓。

And Cucumis sativus L. were tested by bioassay-guided separation. The extracts from P. tomentosa flower with ethanol were extracted with petroleum ether, ethyl acetate and n-butanol. The inhibition rate of the ethyl acetate extract to growth of the 3 kinds of plant radicel were 99.89%, 63.53% and 32.74% respectively at 0.5 mg/mL concentration, and that of petroleum ether were 76.30%, 56.17% and 23.36%.

绒叶泡桐Paulownia tomentosa花乙醇提取物依次用石油醚、乙酸乙酯、正丁醇和水萃取后进行活性测定，结果表明，石油醚萃取物在浓度为0.5mg/mL时，对反枝苋、生菜和黄瓜种子胚根生长的抑制率分别为76.30%、56.17%和23.36%；乙酸乙酯萃取物在浓度为0.5mg/mL时，对反枝苋、生菜和黄瓜种子胚根生长的抑制率分别为99.89%、63.53%和32.74%。

The effects of ,, and temperature on the distribution ratio have been investigated. The composition of the extracted species is determined by the methods of slope ratio, continuous variation,extraction isotherm curves and their chemical analyses. The extraction is found to proceed according to the reaction:AuCl_4 ~-+DEOTA_(0)TAuCl3 .DEOTA_...

着重研究了盐酸浓度、氯离子浓度、氢离子浓度和温度诸因素对萃取的影响；对有机相中金的反萃行为也进行了初探；通过斜率法、等摩尔系列法、萃取等温线法确定了配合物的组成；推定了DEOTA在盐酸体系中萃取金的机理为配位取代反应；计算了萃取反应的表观平衡常数和配合物的稳定常数。

The phenol in the wastewater from fluorobenzene production was recovered by replacement extraction with TBP as extractant and NaOH aqueous as reverse extractant.

以磷酸三丁酯为萃取剂、NaOH水溶液为反萃剂，采用萃取置换法回收处理氟苯生产废水中的苯酚。

With the extraction efficiency of rotenone and total substance obtained as estimated index, the technology conditions of extracting rotenone from the leaves of Tephrosia vogelii were investigated by SFE-HPLC method.

采用超临界流体萃取反相高效液相色谱法，以鱼藤酮萃取率和萃取产物总得率为评价指标，研究提出非洲山毛豆 Tephrosia vogelii Hook.f中鱼藤酮的超临界流体萃取较优工艺条件为：萃取物料粒径30目，静态萃取20min，萃取温度45℃，压力27.58MPa，流体总流量30mL/g，萃取前向萃取池中加入3mL甲醇作夹带剂。

Solvent Extraction method was applied to separate trace tin and trace germanium, which tributyl phosphate and tetrachloromethane became a kind of extractant, using counter synergistic extraction, and inorganic salt was used as salting-out.

主要是采用液-液萃取法，用磷酸三丁酯与四氯化碳作为混合萃取剂，利用反协同萃取，并加入无机盐作为盐析剂对微量锡与微量锗进行分离富集。

According to the results of the former study in our laboratory, trans-1, 2-cyclohexanediol is produced with a lot of acids and water, for extraction of trans-1, 2-cyclohexanediol from the solution, ethyl acetate and butyl acetate were used as extraction reagents, the solubility data of the trans-1, 2-cyclohexanediol in corresponding mixed solvents of some sorts of acetates and water are needed.

根据本实验室前期研究结果可知，反式-1，2-环己二醇是在酸性和大量水存在的条件下得到的，为了把反式-1，2-环己二醇从反应液中萃取出来，本工艺所采用的萃取剂是乙酸乙酯和乙酸丁酯，需要获得反式-1，2-环己二醇在这些酯类与水混合溶剂中的溶解度数据，因而对反式-1，2-环己二醇进行相关固液相平衡的研究是非常迫切和必要的。

In the pulse plate column of the plate's aperture being 3.2 mm, the open mesh area percentage is 23%, and the distance between plates is 50 mm, extraction: phase ratio 3:1, reaction order: 2~3; washing: phase ratio 6:1; re-extraction: phase ratio 3:1, the product phosphoric acid and all the content of impurity can attain or overmatch the old-style extraction equipment.

在脉冲筛板萃取塔中，在萃取时相比为3：1，反应级为2~3，洗涤时相比为6：1，反萃时相比为3：1的条件下，所得磷酸及各项杂质含量指标均达到或优于老式萃取设备。

A method for the determination of trans-fatty acids in vegetable butter by microwave-assisted extraction coupled with gas chromatography was developed.

建立了微波辅助合成／萃取－气相色谱测定植物黄油中反式脂肪酸的分析方法，优化了萃取溶剂、萃取温度和萃取时间等条件。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。