馏分

With the fractional device manufactured by us, more than 97% natural citral can be separated out from the litsea cubeba oil, which is hard to rectify, the product with pure odor is produced with high yield and low energy consumption.

公司设计制造的分馏设备可从分馏难度较大的山苍子油中单离出97%的天然柠檬醛，生产的产品香气纯正、得率高、能耗低。

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。

The product quality, yield and the energy consumption of column will directly influence by the design and function of NGL fractional column .

天然气凝液分馏是天然气凝液回收工艺过程的重要组成部分，凝液分馏塔的设计和运行是否合理，将直接影响产品质量、产品收率和塔运行能耗。

Using Rali isotope fractionation effect to get methane isotope fractionation formula. According to the relationship between isotope fractionation of diagenesis and depth, and combined with sedimentary rate of the region, it is estimated that relict gas of the biothermocatalytic transitional zone gas in the representative basin.

应用瑞利同位素分馏效应推导了过渡带气低温催化作用甲烷同位素分馏公式，依据成岩过程同位素分馏与深度变化关系，并结合该区的沉积速率对典型盆地的过渡带气残余生气量的分数进行了估算。

The company performs the professional design according to the investment scale and the production features, uses the international advanced falling film heating vaporation technology, the rectification process is characterized by high heating rate and low energy consumption, the liquid in the caldron is in the motion state all the time, which solves the technical problems of the traditional fractionation equipment such as long time stationary material liquid in the caldron, locally heated media, deterioration or polymerization, more bottom settlings and unpleasant burned taste caused by overtemperature.

公司根据企业的投资规模和生产特点进行专业设计，运用了国际上先进的降膜加热蒸发技术，分馏过程加热速度快、能耗低、釜液始终处于运动状态，解决了传统分馏设备存在的原料液在塔釜内长时间静止、介质局部受热、温度过高、导致产品变质或聚合、脚子多、产品带有不愉快焦味等技术难题。此外，采用了真空状态下连续出料技术，解决了分馏过程中系统放料操作通入空气，导致系统真空不稳定及带来热敏性介质氧化聚合问题。

It is explained that the large fractionation of boron isotope observed in tourmalines of Altay No. 3 pegmatite is resulted from the fractionation of boron isotopes between tourmaline and muscovite, and also tetraborate, in combination with the fractionation between fluid and melt phases.

本次研究利用电气石-白云母和电气石-四硼酸盐矿物间的同位素分馏以及熔体相-流体相间的同位素分馏，合理解释了阿尔泰3号伟晶岩脉电气石B同位素分馏过程，并首次获得伟晶岩形成、演化过程中B同位素组成演化的全程图谱。

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。

Various solvent naphtha fraction generally have to go through refining.

各种溶剂油馏分一般都需要经过精制加工。

The heavier distillations, such as gas oil, undergo various other processes, of which the most important is known as cracking.

对于较重馏分的蒸馏，如柴油，需要额外经过几个步骤，其中最重要的步骤是裂化蒸馏。

Research progress at home and abroad in recent years was reviewed on the correlation s of physica1 and chemical properties between crude oil and its distillations including the selection of correlation al parameters and the conformation of correlation al formulas.

综述了国内外原油及馏分油物性关联研究的进展，包括关联参数的选择、关联公式的构造等。

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。