精馏

As there exists azeotropic composition for high concentration ethanol/water mixture, the separation of ethanol/water based on distillation and ethanol dehydration consume a major part of energy in an ethanol production process.

具有较高乙醇浓度的乙醇/水混合物存在共沸组成，因此基于精馏的乙醇-水的分离及脱水在乙醇工业生产的能耗中占有很大的比例。

Through computer simulation of azeotropy rectification dehydration tower with benzene as entrainer, the optimal technical parameters were obtained as follows:①the output quantity of top tower was 69 kg／h, return benzene phasor as 58 kg／h and reflux ratio as 3, alcohol concentration in charge the higher the better, however, its maximum value influenced by water content at azeotropy point;②sensitivity analysis results indicated that the sensitivity of output quantity of top tower was the highest, alcohol concentration in charge the second and return benzene phasor and reflux ratio the lowest.

对以苯作为夹带剂的共沸精馏脱水塔进行了计算机模拟，得到了最佳工艺参数：①塔顶采出量为69 kg／h，返回苯相量为58 kg／h，回流比为3，进料乙醇浓度越高越好，但其最大值受共沸点水含量的影响。②敏感性分析的结果为塔顶采出量的灵敏度最大，进料乙醇浓度次之，而返回苯相量和回流比较小。

Keywords azeotropy;pressure-swing distillation;process simulation;ethanol-benzene;Aspen Plus

共沸； 变压精馏；过程模拟；乙醇苯； AspenPlus

Using benzyl chloride and chlorine as starting materials, benzal chloride is prepared through photo-chlorination in loop reactor.

采用环流反应器、以氯化苄和氯气为原料进行光氯化反应，制备苄叉二氯；将制得的苄叉二氯粗品进行真空精馏得到高纯度的精品；然后用一种新型醇胺类相转移催化剂，分别以盐酸和水作为介质，在 90～ 110℃水解后得到了高纯度的苯甲醛。

In this way benzothiophene extraction rectification can be conducted under more economic condition, therefore the better separation effect was achieved.

使硫茚萃取精馏在比较经济的条件下进行，并取得了较好的分离效果。

The extractive distillation process of benzothiophene was simulated using the software of Aspen plus.

采用Aspen plus软件模拟计算硫茚的萃取精馏，并通过了实验的校核。

Especially for structured packed columns, which are boomingly used, due to the poor self-distributivity resulted from the lower pressure drop of the structured packing, and the more sensitivity to gas distribution, the influence of gas distribution for structured packed columns is more severe.

特别是目前逐渐被广泛应用的规整填料塔，由于其阻力小，对气体得自分布性能较差，同时有对气体的分布较为敏感，所以气体分布状况会对整个精馏塔的分离效率有较大的影响。

The studies on production of pure cyclopentadiene by depolymerization-rectify of technical dicyclopentadiene and the influenceable factors about preparation of cyclopentene by liquid hydrogenation of cyclopentadiene at the Raney Nickel catalyst were carried out.

介绍了以工业级双环戊二烯为原料，经过解聚-精馏得到高纯度的环戊二烯，以骨架镍为催化剂，对环戊二烯液相加氢制备环戊烯的影响因素进行了研究。

The result of study on the apparent kinetics of photochlorination of acetic acid showed that the reaction rate is comparatively slow and the byproduct of dichloroacetic acid is created during the reaction. In order to put the technology of photochlorination of acetic acid into industrialization, the new technology about distillation column with a single reactor having a large reactive potency must be adapted.

由乙酸光氯化反应宏观动力学研究结果可见，反应速度相对较慢，且生成二氯乙酸副产品，为了乙酸光氯化工艺实现工业化，必须采用具有较大反应能力的反应与精馏耦合工艺。

Pure ethylamine, diethylamine and triethylamine were separated using six distillation towers.

乙基胺分离系统包括6个塔，精馏后得到纯的一乙胺、二乙胺、三乙胺产品。

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。