精馏

Refining monomer and preparating plexiglas sheet having yellow color were researched. The two projects were adopted, one was to add fluorescence adding white acidifier OB and PF, the other was to process alkali to wash and add additive before rectifying.

对工业上精制单体制取有机玻璃板颜色发黄问题进行了研究，采用在预聚体中加荧光增白剂OB和PF与裂解单体进行精馏前碱洗及加添加剂两个方案。

1,6-Dimethyl adipate with selectivity of 100% was synthesized by batch and continuous esterification process using adipic acid and methanol as raw materials,DNW-I strong-acid cation exchange resin as catalyst.

摘 要：以DNW-I型强酸型正离子交换树脂为催化剂，己二酸和甲醇为原料，经间歇酯化和连续酯化反应后通过精馏可制备选择性为100%的1，6-己二酸二甲酯。

Based on quasi-binary method built agone, a new RD column design method is put forward.

基于建立的拟二元法，提出一种新的反应精馏塔的设计法。

The invention provides an anhydrous hydrogen fluoride production process; reaction raw materials fluorite powder and sulfate are mixed by an external mixer and enter into a converter with jacket; hot air with the temperature of 350 DEG C to 600 DEG C is fed in the jacket; the fluorite powder and the sulfate have chemical reaction and produce hydrogen fluoride; the produced hydrogen fluoride enters into a scrubber from a furnace header to be washed; the washed hydrogen fluoride enters into an intermediate tank from a condenser, and then receives distillation and degasification to prepare the finished product anhydrous hydrogen fluoride; solid residue is emitted from a furnace tail.

本发明提供一种无水氟化氢生产工艺，反应原料萤石粉及硫酸经外混器混合后进入带有夹套的转炉，向夹套内通入350～600℃的热风，萤石粉和硫酸在发生化学反应生成氟化氢，生成的氟化氢气体由炉头进入洗涤塔进行洗涤，洗涤后的氟化氢由冷凝器进入中间槽，然后经过精馏、脱气制得成品无水氟化氢；固体残渣由炉尾排出。

With a strong affinity between water and ammonia, the purification of ammonia is rather difficult.

由於氨与水具有强亲合性，为了获取高浓度的氨气，都是藉由体积庞大的蒸馏塔，将氨气从氨水溶液中精馏出来。

In this paper, a new method of measuring liquid three dimensional flow velocity by rotating the probe in the plane is presented based on the elaborate analyzing of hot film anemometer.

针对热膜流速仪元件的工作原理提出了通过平面旋转测量液体三维流速的新方法，并测量了大型精馏塔板液相单相三维流场，为计算流体力学对塔板模拟提供了实验验证。

In order to study the permission quantity of heat transfer from high temperature smoke in the process of zinc refining in lead column, a control model was established based on the law of mass conservation and the law of energy conservation.

为了研究铅塔锌精馏过程中高温烟气供给塔盘的允许传热量，基於质量守恒和能量守恒定律，建立了铅塔锌精馏过程高温烟气供热控制模型。

Meanwhile, the most difficult task for simulation and optimization of heterogeneous distillations is to determine whether the liquid phase is stable in column stages or packing sections, which is also one of the focuses of this dissertation.

对三相共沸精馏过程而言，一个汽相和两个液相(来源：ABC论文68网www.abclunwen.com)形成汽液液三相共存现象，第二个液相会或多或少地改变精馏过程的流体力学特性并最终影响过程的传质分离效率。

Conventional and new modes of batch distillation were studied to reduce energy cost in the separation of aqueous isopropanol.

针对间歇恒沸精馏法从异丙醇水溶液中回收异丙醇能耗高的问题，研究了传统和新型操作方式对二元、三元间歇恒沸精馏的影响。

In petrochemical process, there are many important indicator variables that cannot be measured on-line. Such as purity, dry point of distillation product and distillation tray efficiency, etc.

在石油化工生产中，存在很多无法在线测量的重要指标变量，例如炼油企业精馏产品的纯度、干点以及精馏塔塔板效率等。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。