精馏

Adsorption rate of thiophene was slower than that of ethanethiol under same condition.

目前常用的脱硫方法有加氢脱硫、催化脱硫、精馏脱硫和吸附脱硫等。

SO(superscript 2- subscript 4)/ZrO2-TiO2 solid super acid was prepared and used as the catalyst for synthesis of glycerol triacetate from glycerol and acetic acid.

采用复合固体超强酸SO(上标 2-下标 4)/ZrO2-TiO2为催化剂，甘油和醋酸为原料，结合醋酸精馏回流工艺，合成了三醋酸甘油酯。

The Bidiagonal matrix method for the simulation of distillation and catalytic distillation is developed. The bidiagonal matrix method is proved to be better in convergcnce and stability by compared with the tridiagonal matrix method.

在多组分精馏塔的稳态模拟计算中，三对角矩阵法具有占用计算机内存少，无需计算偏导数矩阵等优点，但对强非理想性体系有时计算不收敛。

The proper models, such as Chao-Seader model, are chosen to caculate physical properties parameter so that physical properties caculation can be simplified and has good accuracy, tridiagonal matrix method is used to solve process modes. Normalization algorithms is improved.

模型以经典经验公式与操作员经验相结合估算精馏塔效率；选择Chao—Seader模型计算物性参数使物性计算简洁并达到较高精度；应用三对角矩阵泡点法求解过程模型；改进归一算法，提出CMB法与θ法相结合的新型归一算法提高了模型计算的收敛性与快速性。

The reduced quasi-block tridiagonal matrix simultaneous correction algorithm based on LU decomposition is developed for interlinked distillation columns, which can successfully solve non-tridiagonal matrix caused by connecting stream or recycle stream of the column system.

提出了处理内联精馏塔系统的基于LU分解的压缩型拟块三对角矩阵方程组同时校正算法，解决了由于塔之间存在联接物流或回流而形成的非三对角矩阵方程的求解问题。

It was proposed in the 1960's and developed rapidly in the 1990's. However, some theory problems, for example, the fluid dynamics and mass transfer during the filling up period which could not be dealt with in conventional distillation theories has been remained unstudied. And the simulation and mathematical models have to be made based on some assumptions, which are different from the actual situation obviously. Therefore the further development of DACO was restrained in the past years.

该操作方法自20世纪60年代提出，90年代以来得到了迅速发展，但众多学者的研究基本上集中在优化操作及其与传统恒回流法的比较，而许多重要的基本理论问题至今缺乏研究，特别是传统精馏理论无法涉及的塔内无回流充液阶段的流体力学和传质问题一直没有得到很好解决，导致了动态累积循环操作法的数学模型和模拟计算只能以与塔内真实状况相差很大的简化假设为基础，这严重地阻碍着动态累积循环操作法的进一步发展。

Taking advantage of better solubility and thermal stability of ionic liquid, the ionic liquid supported acetylacetone catalyst can be simply recycled by water washing or vacuumdistillation.The background of this research is renovation on the traditional oxidation reactions by green chemistry principle.

根据离子液体支载催化剂的两个特性：在水中良好的溶解性和具有很好的热稳定性，在反应结束后通过水洗涤或精馏的方法，很方便的对催化剂进行了回收再利用。

In this work, a new process based on ion-exchange and high vaccumn distillation was developed. A weak alkalic ionexchange resin, D301, was screened out.

本文研究开发了以离子交换树脂法和真空精馏结合分离提纯乙酰丙酸的新工艺。

The process of continuous heterogeneous azeotropic distillation for isopropanol-water system was studied.

为适应工业大规模连续化生产的要求，进行了异丙醇-水体系非均相共沸精馏连续过程的实验研究。

Extractive distillation is an important and useful technique for separating close boiling and azeotropic liquid mixtures.

萃取精馏是分离沸点相近或具有恒沸组成混合物的一种重要方法。

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。