查询词典 synthesis method

The effect of heating temperature on the synthesis was investigated and the synthesis process was studied by thermodynamic analysis as well.

考察了加热温度对SiC-Al2O3系复合耐火粉体合成的影响并对合成过程进行了热力学分析。

Difunctional group reagents, which have metal and heteroatom linked to the olefinic carbon atoms, play an important role in organic synthesis, especially in developing many convenient methods for the stereoselective synthesis of substituted alkenes.

含金属或杂原子的双官能团试剂为取代烯烃的立体选择合成提供了许多方便方法，在有机合成中具有重要作用。

We have studied the transition metal complexes catalyzed sequential cross coupling reactions of these new difunctional group reagents with electrophiles and nucleophiles, respectively; developed some convenient and practical new methods for the stereoselective synthesis of disubstituted alkenes, trisubstituted alkenes, conjugated dienes containing heteroatom, conjugated enyne containing heteroatom etc., enriching methodologies for organic synthesis.

继而研究了这些新型双官能试剂在过渡金属配合物催化下分别与亲电试剂、亲核试剂的顺序交叉偶联反应，为双取代烯烃、三取代烯烃、杂原子取代的共轭二烯烃、杂原子取代的共轭烯炔烃等的立体选择合成提供了方便实用的新方法，丰富了烯烃立体选择合成的方法学。

Hydrogenolysis results show that the activity and selectivity of methanol produced from synthesis gas are smaller than those from pure H2.With increasing reaction temperature,the activity of methanol synthesis increases gradually,with simultaneously speeding up of side reactions.

结果表明，合成气氢解反应活性和甲醇选择性明显低于纯氢氢解反应活性和甲醇选择性，反应温度高对提高催化剂活性有利，但同时也加速了副反应的进行。

An alternative way of the synthesis of methanol from syngas is low-temperature methanol synthesis via methyl formate in liquid phase, namely, carbonylation of methanol in the first step, and hydrogenolysis of methyl formate in the second step.

低温液相甲醇合成是指在（80-160℃）范围内，甲醇首先与合成气中的CO发生羰基化反应生成甲酸甲酯，甲酸甲酯再氢解生成甲醇的两个反应在一个反应器内串联进行的方法。

Development of indene industry and synthesis of indene was introduced in the aspects of separation and synthesis.

概述了国外茚工业的发展现状，重点阐述了茚的分离技术及合成工艺的研究进展。

The scholars pursuing the researches of DES come from the fields of automatic control as well as computer, communication, manufacturing and management science and so on.The research of DES mainly consists of system performance analysis and control synthesis. The present dissertation uses Petri nets as tool to study the controller synthesis of DES with inequality constraint.

制造系统(尤其是柔性制造系统FMS、计算机集成制造系统CIMS)、系统调度、通信网络、交通控制系统、随机服务系统、计算机操作系统、军事上的C_3I系统以及其他一些对现代文明的发展至关重要的系统等都是DES的典型实例。

Recent developments in the synthesis,modification and catalytic properties of titanium silicalite molecular sieve are reviewed,including the developments in the synthesis of TS-1 with hydrothermal and isomorphous replacement methods,the modification of TS-1,as well as applications in catalytic oxidation and acid catalysis systems.

本文重点综述了近年来钛硅分子筛催化材料的合成、改性及其催化应用的研究进展，包括钛硅分子筛（TS-1）的水热合成方法和同晶取代合成法、改性、成型与负载以及钛硅分子筛催化氧化功能和酸催化功能的研究。

The experimental results indicate that methanol synthesis gas can be produced by steam gasification of lauan sawdust at 680℃ without catalyst addition. However, in the presence of steam reforming catalyst (RKNR+RKS-1), weight ratio of catalyst to dry wood sawdust =1, methanol synthesis gas can be produced at 580℃.

实验结果显示：未加触媒时，本屑在680℃气化所产生的气体可用於甲醇的合成；而使用蒸气重组触媒(RKNR+RKS-1)，在580℃、触媒与全乾木屑的重量比为1时，所产生的气体即可用於甲醇的合成。

In the paper the effects and main differences of maleic anhydride and acrylic acid in the synthesis of polycarboxylate superplasticizers are analyzed according to their respective characteristics and technical requirements for synthesis.

根据马来酸酐与丙烯酸各自的特性和聚羧酸盐减水剂合成的技术要求，分析了它们在合成过程中的作用和主要差别，并概述了马来酸酐在合成中的应用情况，最后提出了马来酸酐在合成中应用的几点建议。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。