查询词典 toluene

To effectively enhance the contraposition selectivity of chlorinating reaction the p-chlorotoluene was prepared by direct chlorination of toluene and chlorine gas in the presence of zeolite catalyst.

为了有效提高甲苯氯化反应的对位选择性，研究了在分子筛催化作用下甲苯与氯气直接氯化制取对氯甲苯。

The usual plan is to put in the water first, then add the indigo and copperas, which should be dissolved first, and finally to add the milk of lime, stirring all the time. Artificial indigo has been made from coal-tar products. The raw material is a coal-tar naphtha called toluene or toluol, which is also the raw material for saccharin, a sweetening agent made from coal-tar.

通常先加水，然后添加靛蓝和已溶于水的绿矾，最后加石灰乳，不时的搅拌人造靛青是取自煤焦油的产品物，原料是所谓甲苯的煤石脑油，这也是糖精的原料，糖精是取自煤石脑油的一种甜剂。

The nature and strength of the cation-π interactions between and toluene, p -cresol, or Me-indole were studied in terms of the topological properties of molecular charge density and binding energy decomposition.

本文通过电荷密度的拓扑性质和结合能的能量分解两个方面研究了NH4+与甲苯、对甲基苯酚以及甲基吲哚间阳离子-π相互作用的大小及其作用本质。

In order to satisfy the user's demands ,O –cresol Formaldehyde Epoxy Resin was successfully synthesized by using component solvent of toluene to substitute for MIBK.

为满足用户，在实验室成功地使用了甲苯代替MIBK生产邻甲酚醛环氧树脂。

For example, in 10^(-4) mol/L toluene solution, cruciform 1 shows a σ' value of 491.0×10^(-50) cm^4s, while the σ' value of R1 is only 137.5×10^(-50) cm^4s.

在10^(-4)mol/L的甲苯溶液中，十字结构分子1的σ'值为491.0×10^(-50) cm^4s，而R1的σ'值仅为137.5×10^(-50)cm^4s。

Polystyrene itself is non-toxic, but the residual polystyrene resin polymerization of styrene monomer and some other volatile substances, including ethylene, cumene, toluene, etc., have a certain toxicity.

聚苯乙烯本身是无毒的，但聚苯乙烯树脂聚合残留的单体苯乙烯及其他一些挥发性物质，包括乙烯、异丙苯、甲苯等，有一定毒性。

The surface activity of fluorocarbon surfactants in organic liquids such as toluene,hexane,decane,cyclohexane,nitromethane,dimethylsulfoxide,1-butanol,etc.,was investigated by measurement of surface tension.

碳氟表面活性剂由于其碳氟链既疏水又疏油的特性，除了可显著降低水溶液的表面张力之外，也可降低有机液体的表面张力﹝14﹞。

Emphasis has been put on changes of structure properties such as crystallization, crystal cell parameter, BET surface area, average pore diameter and pore volume with addition amount of FCC decant oil under conditions that the ratios of toluene to FCC decant oil are 1∶1 and 2∶1 respectively.

结果表明，当剂油比为1∶1时，分子筛的结晶度和晶胞参数随催化油浆添加量的变化呈现先增加后减小趋势，当noil/nCTMAB=0.34时，其晶胞参数最大可以达到5.95 nm；当剂油比为2∶1时，随添加剂量的增加，分子筛结晶度降低，BET表面积成先增大后减小，而孔容和平均孔径呈逐渐增加趋势。

The principle of double-effect energy saving was applied to retrofit the traditional separation process for toluene diamine.

采用双效节能原理对传统的甲苯二胺分离工艺进行改进。

The dual-site phase-transfer catalyst, 1,4-bisbenzene dibromide, was synthesized in toluene solution at 70℃ from p-xylylene dibromide and tributylamine.

双活性基相间转移触媒是由二溴对二甲苯与三丁胺以甲苯为溶剂在70℃下反应生成溴化1，4-二苯。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。