分馏的

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。

The main method of separation used in refineries is fractional distillation , although further processing is normally required to produce marketable petroleum products .

炼油厂所使用的主要分离方法是分馏，不过分馏所得一般都需要一步加工才能成为可供销售的石油制品。

The second variation type is called reversion evolution type, which represents the liquid segregation mainly with vapour-liquid fractional distillation. The third variation type is called saltatory variation type, which is formed from the liquid segregation mainly with immiscibility.

称为正向演化类型，是结晶分异结果；②称为反向演化类型，代表气液分馏为主的液态分离；③称为演化突变类型，是不混溶为主的液态分离形成。

Secondly,the synthesis of SIPE and the reaction conditions such as catalyst,anti-ether agent,temperature and water are researched to control the generation of diethylene glycol and the self-polymerization of SIPM by controlling the total quantum of distillate and the temperature of distillation column and reaction and the reliable synthetic conditions of SIPE are obtained.

其次，在此基础上，研究了三单体的中间体SIPE的合成工艺，研究了催化剂、抑醚剂、反应温度及水分等对合成反应的影响，同时提出了控制馏出物总量、控制分馏柱温度和控制反应温度等措施来控制二甘醇生成反应和SIPM自聚等副反应，得到了可靠的SIPE合成工艺。

According to the characteristics of the cold insulation box of Fractionating tower, it is considered that the effect of inner-filling on the construction is related with the variable density, then the relative formulation in the condition of n...

根据分馏塔保冷箱的特点，认为内填料对结构的作用与变密度有关，推导了无水平位移下的相关公式；对此结构在有水平位移下内填料的发育进行仿真分析，并将内填料的作用与结构的楼层柱的旋转角建立联系；最后根据得到的结论对分馏塔保冷箱在风与内填料作用下进行了非线性分析，得到结构的极限承载力。

In addition, based on process calculations and soft sensor technology, the author built a online and real time mechanism models which can calculate the quality parameters of unmeasured distillate from fractionating tower, and used them as controlled variable of RMPCT Controller.

另外，利用软测量技术，在工艺计算的基础上建立机理模型，在线、实时地计算出不可测的分馏塔各馏分油产品的质量指标，作为RMPCT控制器的受控变量。

The simulation results show good agreement with the industrial process mechanism. In order to describe the oil trap structure of the main fractionating tower, the basic tray model is improved by embedding oil trap model.

还针对燕化延迟焦化装置分馏塔中存在的集油器结构的特点，对分馏塔的基本塔段模型进行改进得到了含集油器结构的塔段模型。

The difference in δ 13 C values (2 88‰±0 31‰) between upland buzzards and small mammals was much larger than the differences reported previously, 1‰-2‰, and showed significant difference, while 1 31‰± 0 34‰ between upland buzzard and passerine bird species did not differ from the previously reported trophic fractionation difference of 1‰-2‰.

基于碳同位素的分馏模式(即动物和它食物之间稳定性碳同位素分馏在 1‰～ 2‰之间)，我们推断经大规模灭鼠后，大的食性发生了较大变化，其食物主要来源于高寒草甸的雀形目鸟类，而非原来的小型哺乳类。

Carbonate rocks are susceptible to later recrystallization during deep burial, and can isotopically re-equilibrate with higher-temperature fluids depending upon the water/rock ratios and the isotopic composition of the fluids.

碳酸盐岩在深埋过程中很容易被后期的重结晶作用影响，并且在高温流体的加入时发生同位素的分馏，这种分馏与水/岩比率以及流体同位素的组成相关。

Topological optimization system of variable density method based on finite element software;2. Interface depths inversion of potential field data with variable density model;3. According to the characteristics of the cold insulation box of Fractionating tower, it is considered that the effect of inner-filling on the construction is related with the variable density, then the relative formulation in the condition of n.

根据分馏塔保冷箱的特点，认为内填料对结构的作用与变密度有关，推导了无水平位移下的相关公式；对此结构在有水平位移下内填料的发育进行仿真分析，并将内填料的作用与结构的楼层柱的旋转角建立联系；最后根据得到的结论对分馏塔保冷箱在风与内填料作用下进行了非线性分析，得到结构的极限承载力。

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。