精馏

Secondly, the optimum operating conditions of the batch distilling tower for separating amyl alcohol from the fusel oil were found by applying CC-BATCH, a batch distillation model of the chemical engineering simulative system named ChemCAD5.0, to simulate and calculate the special technological process of salt outing-special batch distillation.

其次，利用ChemCAD化工模拟系统软件中的CC-BATCH间歇精馏模块对"盐析—特殊间歇精密精馏法"从杂醇油中制备C5醇的分离工艺进行了全流程模拟优化计算，模拟过程在所设限定条件下能满意收敛，所得结果与实验结果基本上一致。

The appositeness of gas furnace gas application in the production of zinc powder by distillation method as heating energy is described.

阐述采用煤气发生炉生产煤气作为精馏法生产锌粉生产工艺中加热源的合理性，分析两段式煤气发生炉在用于生产热煤气时的优缺点，介绍其在精馏法生产锌粉生产工艺中的应用及其所做的改进。

This model austerely simulating dynamic action of vacuum distillation unit, and the dynamic curve of Vacuum's sidetrack from feed-in to static state.

该模型严格地模拟了减压精馏塔的动态行为，模拟了稳态下进料发生变化时减压精馏塔中各塔板上液相浓度变化的曲线。

Batch extractive distillation is used to separate azeotrope or the mixture of which the relative volatility is close to 1.0. For it has both advantages of batch distillation and extractive distillation, batch extractive distillation is becoming increasingly important to the production of small scale and high value products like fine chemicals and pharmaceuticals.

间歇萃取精馏是分离共沸物或近沸物的一种方法，由于它结合了间歇和萃取的优点，特别适用于化工、制药、溶剂回收、天然产物提取等产量小，品种多的行业，因此间歇萃取精馏近年来已成为非常活跃的研究和开发领域。

In the end, the extractive distillation method was applied to separate and purify the binary azeotrope mixture, methanol-dimethyl carbonate. The isoamyl acetate was used as extractant and the two tower system was introduced to continuous extractive distillation operation. The results show a better separation effect.

最后采用萃取精馏的方法，对甲醇-碳酸二甲酯的二元共沸混合物进行了分离提纯研究，以毒性较低的乙酸异戊酯为萃取剂，采用两塔连续萃取精馏操作，结果表明，分离效果比较理想。

Linear solvation energy relation was firstly introduced in the paper, and the method and step of gaining the special parameters of solvent and solute were introduced in detail, and these special parameters were used to selection and optimization of extractive agent in extractive distillation. The model of predicting activity coefficient at infinite dilution was established by linear solvation energy relation. By the above theory, several candidate solvents were selected to separate C5 fraction, and by experiment of vapor-liquid phase equilibrium at atmosphere pressure, the mixture of N-methyl-pyrrolidone including 4% water was used extractive agent of separating C5 fraction. Then binary vapor-liquid phase equilibrium of the some compound in C5 fraction and N-methyl-pyrolidone were determined at atmosphere pressure and correlated by NRTL equation. Isoprene being objective compound, experiments were operated in the laboratory-scale column; the processes were simulated by RadFrac model in ASPEN PLUS. And by the combination of experiment and simulation, the new process of separation of C5 was established.

本文首先对线性溶剂化能关系进行了分析介绍，也介绍了采用溶剂化能关系得到溶质溶剂特性参数的方法步骤，并将这些参数用于萃取精馏萃取剂的选择与优化；也通过线性溶剂化能关系式建立无限稀释活度系数预测模型，取得了一定的预测精度；将通过上述方法初选的溶剂进行了常压汽液平衡的测定研究，通过实验研究选定含水4%的N-甲基吡咯烷酮溶液做为C5分离的萃取剂，测定了大量N-甲基吡咯烷酮与C5组分的二元平衡数据，并进行关联计算；以异戊二烯为目标产物在实验室规模的精馏塔内进行了C5分离的实验研究，取得大量塔内数据；通过选用合适的热力学模型，采用ASPEN中RadFrac模块对分离过程进行模拟研究，通过实验与模拟相结合，建立了C5分离的新工艺，为将来的工业化打下了坚实的基础。

In this thesis, control and optimization of heat pump assisted distillation is studied based on a mechanism model.

本文在热泵精馏模型化的基础上，分析了塔顶蒸汽压缩型热泵精馏过程的特性，并研究了过程控制与优化的一些问题。

The experimental setup is designed to measure the change of dynamic holdup during the course of non-reflux period and the calculation value is consistent with the experimental results, which indicates that the downflow velocity of dynamic holdup becomes smaller with the decrease of dynamic holdup in the column during the course of non-reflux period.

本文设计了测定无回流过程中动持液量变化的实验装置，在与动态液相交换的全回流间歇精馏串联实验相同的条件下测定了无回流阶段的动持液量变化，模型计算值与实验值比较吻合，结果表明在无回流过程中随着精馏塔中动持液量越来越少，动持液向下流动速度也越来越小。

Then in another tower, of which the height was 1.6m and the inner diameter was 20mm, the pentanol mixture was exactly rectified. The influence factors on separation effect, for example, the material concentration, evaporation velocity, circumfluence rate.etc, were studied and a set of separation system about salt-out -exactitude rectify was upbuilt. The result showed: when the material concentration was 60%, we got our product, 2-methyl-1-butanol, with the concentration over 99% and the top quality recovery over 82.7% which would increase as the material concentration did.

在高1.6m，内径为20rnm的精馏塔内，对戊醇混合物进行精密精馏，研究了原料浓度、蒸发速率、回流比等因素对分离效果的影响，建立了一套盐析-精密精馏的分离体系，结果表明：原料中2-甲基-1-丁醇浓度60％时，得到的2-甲基-1-丁醇产品浓度在99％以上，最高收率达82.7％以上，且随着原料浓度的增加而进一步增大。

The results show that the three-effect concurrent distillation is the best separation technology in response to the objective function of the ratio of multi-effect distillation expenditures to mono-column expenditures.

并以多效精馏与单塔精馏总费用的相对值最低为目标函数，确定分离甲醇－水体系的最佳方案为三效顺流精馏工艺。

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。