查询词典 fractionating

In this dissertation, we choosed anisole as starting material, via chloromethyla tion, cyanogenation, to prepare methoxybenzeneacetonitrile, then fractionated in a fractionating tower, and finally...

本论文也对两步的反应条件进行了探索，获得了比较理想的反应条件。文中还对对甲氧基苄氯自聚的原因与机理进行了探讨，并找到了比较理想的阻聚剂，使得粗品收率提高了10％。

This paper introduces industrial application of the new compound slant-hole tray with multiple downcomer in the refinery gas separation unit, The result shows that the methods for design of the new tray is reliable, and the new tray can be used widely among the fractionating tower, absorbing tower, desorber in petrochemical, chemical, pharmaceutical industries and so on.

介绍了新型多溢流复合斜孔塔板在炼厂气体分馏装置上的工业化应用，结果表明其设计方法是可靠的，可以广泛应用于石化、化工、医药等许多行业的精馏塔、吸收塔和解吸塔上，特别适用于液相负荷很大的体系。

Therefore, fractional distillation must be used in order to separate the components well by repeated vaporization-condensation cycles within a packed fractionating column.

因此，为了很好地分离各组分，必须通过在一个填充分馏柱内不断重复汽化－冷凝周期的方法进行分馏。

In this study,we introduced the use of sodium chloride step gradients in fractionating foreign DNA fragment for microinjection.

与传统的琼脂糖凝胶回收的方法相比较，用此方法制备的外源DNA片段对小鼠受精卵进行显微注射后，受卵体母鼠的胚胎存活率，以及子代小鼠的外源基因整合率均有明显的提高。

As the solution to be purified is heated, its vapors rise to the fractionating column.

当要被提纯的液体受热时，它的蒸汽上升到分馏柱。

Thus, the model has more highly application value and directions on theory to the analysis and design of the fractionating column controlling system.

因此，本模型对于精馏过程的控制系统分析和设计具有较高的实际应用价值和理论指导意义。

The fractionating systems of various specifications are available for manual, semi-automatic and computer automatic control.

各种规模的分馏系统，可实现手动、半自动、电脑自动控制。

In other embodiments, the invention provides a means for fractionating a mixture of gaseous fluids within the formation.

在另外一些实施方案中，本发明提供了一种用于分离岩层内的气态流体混合物的方法。

The working principle of fiber fractionating screen has been introduced,and the function of fiber fractionating screen in waste paper recycling has been analysed by an example of its application.

本文阐述了纤维分级筛的工作原理，并通过一个应用实例分析了纤维分级筛在废纸回用技术上的作

The delayed cooking equipment process mainly consists of heating furnace, coke drum, fractionating tower and some other simple units. Since the heating, coking and fractionating are focused on this study, heating furnace, coke drum and fractionating tower are established and the suitable solution way is selected.

延迟焦化装置流程主要包括加热炉、焦炭塔、分馏塔和其他一些简单单元设备，本论文分别对加热、焦化、分馏过程进行研究，建立了加热炉、焦炭塔、分馏塔模型并选择适宜的解法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。