可精馏的

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。

In addition, the low-temperature heat utilization in deaeration of desahed water and temperature elevation of deaerated water is explored on the basis of refinery system integration and optimization.

其次从炼油厂系统整合优化角度探讨除盐水在除氧环节以及除氧水在升温环节低温热利用的途径，通过技术改进和系统低温热利用相结合，探讨芳烃精馏塔实现回收低温热和消除装置瓶颈的可行性，提出利用区域除盐水集中升温除氧以及区域除氧水先集中升温再进汽包产汽的芳烃脱庚烷塔低温热利用方案，不仅能回收67％的低温热，产生的1.4MPa低压蒸汽（10t／h）还可代替连续重整装置脱已烷塔重沸器的中压蒸汽。

The components of the system being studied are divided into two groups according to degree of volatility, named quasi-heavy component and quasi-light component, then through solving the vapor-liquid equilibrium data of the system, quasi-binary method can be applied to carry out RD graphical design calculation.

把待研究体系的多个组分按照挥发度高低划分为拟重和拟轻两个组分，通过求解体系的汽液平衡数据，可采用拟二元方法进行反应精馏塔的图解设计计算。

The distillation process is simulated by using Aspen Plus with the DSTWU fractionation module and the NRTL property method results showed that 99.9% methylnaphthalene and almost 100% tritoluene could be recovered.

利用Aspen Plus化工模拟软件的DSTWU精馏模块对产物进行模拟运算。结果表明：采用NRTL物性方法的模拟计算结果能够满足工艺要求，甲基萘回收率可达99.9%，溶剂回收率可达100%。

By using ethanol precipitative pretreatment and rectification patent technology,the product 1,3-propanediol with purity of 99% had been harvested,the seperation yield of 1,3-propa...

采用发酵液醇沉预处理、再精馏的专利技术可分离得到纯度大于99%的1，3-丙二醇产品，分离收率大于85%，产品质量达到了聚对苯二甲酸丙二酯聚合反应的要求。

In this paper, the development of pinch zone for ternary systems in constant reflux operation is discussed.

在无穷板数和任一瞬时釜浓下选择不同的回流比可使分批精馏处于不同夹紧区下操作。

The acetic acid is refined by vacuum distillation and azeotropic distillation.

以醋酸的精制可利用减压精馏蒸出和共沸精馏脱水来实现。

It can be concluded that the design results of this paper fit close with results of other literatures, and can maintain low energy consummation at the same time, furthermore the method have advantage of using simply , so it can be used to design RD process.

结果表明，本文设计结果同文献结果吻合很好，且具有适应性强，使用简单等优点，可用于反应精馏过程的概念设计。

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。