精馏

Compared with the traditional process of esterify reaction, Employing the method of distillation with reaction can simplify the esterifying process, and save much energy and money.

结果表明，与传统的酯化反应过程相比较，采用反应精馏法可以简化酯化流程，节省大量能量和开支，是一项切实可行的方案。

It shows that the method is reliable and can be utilized to improve the efficiency of PET equipment. This method can also apply to the esterify reaction process of PBT and PTT.

该反应精馏法亦可应用于生产聚对苯二甲酸丁二醇酯、聚对苯二甲酸丙二醇酯的酯化反应部分。

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。

Ethylene glycol process is a long process, which includes more than ten fractionating columns and fixed-bed catalytic reactor.

乙二醇生产流程是一个包含十几个精馏塔和固定床催化反应器的长流程。

The synthetic route of glycidyl nitrate was improved. Glycidol was synthesized by the cyclization process from allyl alcohol and m-CPBA, then glycidyl nitrate was synthesized with glycidol as raw materials and HNO3/ 2O as nitrating agent.

为了改进缩水甘油醚硝酸酯的合成路线，以丙烯醇为原料，经间氯过苯甲酸环氧化后得到缩水甘油醇，然后GA经硝酸／醋酐硝化后得到了GN，硝化产物GN的收率为70.2%，经过减压精馏后GN的纯度达到了98.9%。

The fraction between the temperature range of 130℃ and 160℃ wascollected and the levulinic concentration was 98%.

洗脱液经浓缩后，在0.00266MPa下精馏，收集130℃-160℃的馏分，最终得到乙酰丙酸的纯度为98％。

The traditional separation and purification process of levulinic acid was consisted of solvent extraction and high vaccumn distillation, which was low in product recovery, high in energy consumption and complex in process operation.

传统的乙酰丙酸分离提取工艺以有机溶剂萃取和真空精馏为核心，乙酰丙酸的回收率低、能耗高、工艺复杂，成了制约工业化生产的主要因素。

Affection of Atmosphere Pressure to Hydro-kinetic Force Process and Amendatery Methid

精馏塔的馏出液组成与塔顶温度有关，大气压不同塔顶温度也不同。

This dissertation is concerned with nonequilibrium stage modeling, optimal operation and control of multicomponent distillation processes.

本文系统地研究了多元精馏过程的非平衡级模型、操作优化与控制问题，主要内容及结果如下

The simulation and optimization of three-phase nonequilibrium model are discussed.

本文主要研究了填料塔精馏过程的三相非平衡模型建模、仿真和优化问题，并进行了一系列实验验证，具体内容包括： 1。

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。