查询词典 distillation

Over a solid acid catalyst, the reaction in which methanol and formaldehyde are condensed into mathylal is reversible. This reaction tends to be completion by reactive distillation and the high-purity methylal product can be obtained.

在固体酸催化剂作用下，由甲醇、甲醛缩合生成甲缩醛，该反应为可逆反应，采用催化精馏技术可使反应趋于完全，并得到高纯度甲缩醛产品。

The experiment results indicate that: the increases of catalyst concentration, feed mole ratio of methanol to formaldehyde and the decrease of total feed flow can increase the yield of methylal; the concentration of methylal in distillate also increases with the increase of catalyst concentration; that the effects of reflux ratio on the yield and concentration of methylal in distillate are different from conventional distillation process, an optimal value of reflux ratio exists between 1 and 2 for this process.

实验结果表明：回流比对甲缩醛收率和塔顶甲缩醛纯度的影响不同于一般的精馏过程，存在一个最优回流比，本过程最佳回流比在1-2之间；提高催化剂浓度，甲缩醛收率和塔顶甲缩醛纯度均增加；提高进料醇醛摩尔比也会提高甲缩醛收率；进料总流量对甲缩醛的收率的影响十分明显，进料总流量减少可以使甲缩醛的收率得到明显提高。

The vacuum distillation technology for production of technical methylnaphthalene was introduced.

本文介绍了采用减压蒸馏法生产工业甲基萘的两种工艺路线，可生产不同品级的产品，并详细介绍了有关操作参数和工艺要点，进行了经济效益的讨论。

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%。

At present, the oil washing process methods domestic uses are washing oil by removing phenol in alkali, removing pyridine and quinoline in acid, getting naphthalene oil, methylnaphthalene oil and heavy oil after distillation.

目前，国内普通采用洗油加工方法是洗油经碱洗脱酚、酸洗脱吡啶和喹啉，蒸馏得萘油、甲基萘油和重油。

Codistillation is distillation which is performed on mixtures in which the two compounds are not miscible.

共馏是对由不易混合的两种化合物组成的混合物进行的蒸馏。

OR IS IT JUST TO SUPPRESS HIS INNER EMOTTIONS,MISGUIDE HIS LIFE-DOMAIN TO DEVELOP IN DISTILLATION ?

就目前这样的现象演化真的是满足人们真正的需求吗？

The effectiveness of criteria based on convergence depth control is shown by the rSQP algorithm in the solution of problems from CUTE, distillation columns under changing feed conditions, and catalyst mixing problem.

收敛深度控制准则的有效性，通过rSQP算法应用于标准算例库求解、变负荷联塔系统优化、催化剂混合优化等数值实验得到体现。

The new model is the same as that of traditional distillation process in expression style, and it is solved by an algorithm which combines the relaxation method with the modified Newton Raphson method.

引入变换变量的概念，将发生平衡反应的反应精馏过程模型变换为普通精馏过程模型，减少了迭代变量，避免了反应量的计算，并易于采用普通精馏的计算方法。

Keywords rose oil;molecular distillation;extraction;separation

玫瑰油；分子蒸馏；提取；分离

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐