查询词典 solvent

Furthermore,The results show that alumina is more suitable for the separation of ethyl linolenate than the widely used silica gel, and the supercritical fluids is a good solvent than organic solvent because of its adjustability by changing the extraction conditions.

研究结果表明，超临界流体分离效果优于石油醚和正己烷等有机溶剂，氧化铝载体分离效果优于硅胶，超临界流体结合硝酸银吸附柱分离亚麻酸乙酯具有较好的效果，可得到纯度约95%的亚麻酸乙酯，其工业应用前景诱人。

An alkaline solution containing mercaptides is regenerated in an improved process wherein the alkaline solution to be regenerated containing a suitable oxidation catalyst is contacted with an oxygen-containing solvent which is immiscible with said alkaline solution in a reaction zone comprising a plurality of fibers positioned longitudinally within a conduit, whereby the two liquids are in contact while concurrently flowing through said reaction zone during which the mercaptides contained in the alkaline solution are oxidized to disulfides and are simultaneously extracted from the alkaline solution into the solvent solution.

包含 mercaptides 的碱解决在一个改良的程序被再产生在何处碱的解决被再产生包含一个适当的氧化催化剂与被说反应的碱的解决组成一个纤维的多数地域纵观地放置在一个导管里面的对一个包含氧的溶剂感到不能相混合的一起连络，那里当协同地流动过说的反应地域的时候，这二种液体保持接触在哪一个期间包含在碱的解决 mercaptides 被使氧化到 disulfides 而且同时地从碱的解决到有偿付能力的解决被吸取。

The Mannich-type addition of O , O'-dialky phosphite to 2-fluorobenzaldehyde and 4-trifluoro- methylaniline was carried out in one pot by means of adopting three kinds of green synthetic methods, microwave irradiation, ionic liquid and free solvent-catalyst condition. According to the results, the synthetic method was optimized without catalyst and solvent at 100 ℃ and 15 min, and it was economic, convenient, high yields, timesaving and environment friendly.

采用微波辐射﹑离子液体和无溶剂无催化剂三种绿色合成方法，分别进行了以亚磷酸酯、邻氟苯甲醛和对三氟甲基苯胺为原料的类Mannich一锅法合成反应研究，经合成筛选，优选出控制反应温度100 ℃、无溶剂和无催化剂加热反应15 min的合成方法，实验结果表明该方法经济、简便、产率高、反应时间短及对环境友好。

Main product has: SBR of butadiene styrene rubber - 1500, SBR - 1502, SBR - 1712, butadiene rubber BR - 9000, BR - 9073 with 6 ＃ solvent naphtha, 120 ＃ industrial aether of butyl of solvent naphtha, methylic father's younger brother, 1 - Ding Xi.

主要产品有：丁苯橡胶 SBR－ 1500、 SBR－ 1502、 SBR－ 1712，顺丁橡胶 BR－ 9000、 BR－ 9073和 6＃溶剂油、 120＃工业用溶剂油、甲基叔丁基醚、 1－丁烯。

Propylene glycol monomethyl ether propionate is new member cf P series solvent of glycol ethers, it not only has the excellent solubility, but also has the lowest genital toxicity among the all of glycol ethers, as a result it is called "green solvent".

丙二醇单甲醚丙酸酯是P系列二元醇醚溶剂中的新成员，它不仅具有优异的溶解性能，更是二元醇醚溶剂中生殖毒性最低微的产品，因而被称为&绿色溶剂&。

Results show the optimal conditions for the moringa seed oil extraction are as follows: using petroleum ether as solvent,the ratio of solvent to moringa seeds is 8∶1,extraction time 40 min and extracting twice with the aid of 28 kHz ultrasonic.At the conditions,the ...

结果显示，超声波辅助溶剂萃取辣木籽油的最佳条件为：溶剂石油醚，提取次数2次，提取时间40 min，超声波频率28 kHz，液料比8∶1，在此条件下，辣木籽的平均出油率为35.85%，提取率96%，表明超声波辅助溶剂萃取法是一种可用于萃取辣木籽油的适宜方法。

Myrcene, unreacted isoprene and solvent were separated form reactant by conventional distillations, the contents of recovered isoprene, solvent and...

回收的溶剂和异戊二烯可以再利用，月桂烯的总收率大于 4 0 %，异戊二烯直接二聚合成月桂烯工艺简单，便于放大

Regeneration of granular activated carbon adsorbing o- nitrophenol was studied using organic solvent as regeneration solvent coupled with microwave irradiation.

采用微波辅助溶剂再生的方法，对吸附邻硝基苯酚的粒状活性炭的再生过程进行了研究。

In this part, the densities of sodium benzoate, sodium nitrobenzoate, sodium chlorobenzoate and sodium methylbenzoate in DMFwater mixed solvents have been measured at 298.15K with an Anton Paar Model 55 densimeter. From these densities, apparent molar volumes and partial molar volumes have been calculated, transfer volumes from water to DMF-water mixtures and substituent contributions to the transfer volumes have also been obtained. Solvent and substituent effects are discussed in detail. The Scaled Partical Theory has been applied to the ternary solutions to evaluate the partial molar volumes of cavity formation and the volumes change associated with solute-solvent interaction.

选择了含有取代基团的芳香类有机电解质，主要是苯甲酸钠、硝基苯甲酸钠、氯苯甲酸钠和甲基苯甲酸钠的邻、间、对同分异构体作为研究对象，用DMA 55型振荡管密度计测定了它们在不同质量百分数组成的DMF-水混合溶剂中的密度，利用这些密度数据，计算了表观摩尔体积和偏摩尔体积，得到了这些单取代苯甲酸钠从水到DMF-水混合溶剂中的迁移偏摩尔体积及苯环上不同位置的取代基对迁移偏摩尔体积的贡献值，讨论了溶剂效应和取代基效应，并将定标粒子理论应用于此三元电解质溶液中。

Densities of glycylglycine in sucrose-water mixed solvent have been measured at 288.15, 298.15 and 308.15 K by Anton Paar DMA55 vibrating-tube digital densimeter. The apparent molar volume VΦ, limiting partial molar volume , partial molar volumes of transfer Δtrs from water to sucrose-water mixed solvent and the hydration numbers Nh for glycylglycine have been calculated.

利用Anton Paar DMA55精密数字密度计测定了288.15， 298.15和308.15 K甘氨酰甘氨酸在蔗糖-水混合溶剂中的密度，计算了甘氨酰甘氨酸的表观摩尔体积VΦ和极限偏摩尔体积，得到了其由纯水溶剂转移至混合溶剂中的迁移偏摩尔体积Δtrs 和理论水化数Nh。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷