The heterogenization of homogeneous catalysis is forecasted to be the industrialization tendencies for alcohols aerobic oxidation. 预测了均相催化剂的多相化是今后工业化发展的趋势。
Unlike homogeneous catalysis, separating catalysts from the reactive mixture was much easier in a heterogeneously catalytic process and the catalysts could be recycled. 同均相催化相比,多相催化具有催化剂与产物分离容易、催化剂可循环使用的突出优点。
Study on the synthesis of diphenyl carbonate in homogeneous catalysis by PbO PbO均相催化反应精馏合成碳酸二苯酯的研究
Thermodynamic Analysis of Methyl Carbamate Synthesis from Urea and Methanol Synthesis of Methyl Carbamate by Urea and Methanol in Homogeneous Catalysis System 尿素和甲醇制氨基甲酸甲酯体系热力学分析
Among which, the ligands with a so-called "pincer" structure have been investigated deeply recent years with regard to their synthesis as well as their potential application in homogeneous catalysis. 其中一类具有pincer结构的吡啶基含氮三齿配体的合成及其在均相催化中的潜在应用,近些年得到了较深入的研究报道。
With the rapid progress of catalysts preparation technology, the trends of the homogenization of heterogenous catalysis and the heterogenization of homogeneous catalysis have been obvious more and more. 随着催化剂生产工艺的迅猛发展,多相催化均相化及均相催化多相化的趋势日益明显。
Synthesis of Pyridine-Based Tridentate N-Ligands and the Application in Homogeneous Catalysis 吡啶基含氮三齿配体的合成及其在均相催化反应中的应用
Mesoporous molecular sieves MCM-41 has large surface, ordered structure and silanol groups on its surface. It can be functionalized and applied to assembly homogeneous catalysis, which makes it possible to heterogenize homogeneous catalysts. 介孔分子筛MCM-41具有较高的比表面和规整的结构以及表面带有羟基,因此可对MCM-41进行官能团化,从而实现均相催化剂在MCM-41中的组装,达到均相催化剂多相化的目的。
The research on water-soluble phosphines modified catalysts and aqueous/ organic biphasic catalysis system provides a promising avenue for the recycling of noble metal catalysts, and it has become a hot topic in homogeneous catalysis. 水溶性膦配体改进的催化剂和水/有机两相催化体系的研究为解决贵金属催化剂的分离回收问题提供了一条极具应用前景的途径,已成为均相络合催化领域的研究热点之一。
Supported liquid phase catalysts ( SLPC) are novel 'hybrids' catalysts, which combined the features of homogeneous catalysis ( high activity and high selectivity) with those of heterogeneous catalysis ( large interfacial area and easy separation of catalyst from the products). 负载液相催化剂是一种新型的混合型催化剂,它结合了均相催化高活性、高选择性和多相催化接触面积大、容易分离的优点,有广阔的应用前景。
Development and prospect of homogeneous catalysis of organo-transition metallic complex 有机过渡金属配合物均相催化发展及展望
Determination of lead by homogeneous catalysis and gas chromatography phase and its significance 均相催化气相色谱法分析铅
In this paper, the new progress in homogeneous catalyst is reviewed. It includes homogeneous catalyst oxidation, olefin polymerization homogeneous catalyst, hydrogenation homogeneous catalyst, heterogenization of homogeneous catalyst and homogeneous catalysis mechanism. 综述了国内外均相催化的最新进展,包括均相催化氧化、烯烃聚合均相催化、加氢均相催化、均相催化多相化新进展及均相催化机理等。
Decomposition Reaction of Hydrogen Peroxide under Homogeneous Catalysis 过氧化氢的均相催化分解反应
In recent years, homogeneous catalysis broadens horizon of process chemistry, this is the area that will most likely make the greatest further progress. 近年来均相催化的进展拓宽了工艺化学的地平线,这看来是将来会取得最大进展的领域。
A series of solid catalysts were prepared in order to solve the problems such as the separation of product, the recovery and recycle of catalyst brought by homogeneous catalysis. 为克服均相催化剂产生的产物分离精制、催化剂回收利用等问题,制备了一系列固体催化剂。
With good stability and high reactivity, pyridine-based tridentate N-ligands have been widely used in the fields of coordination chemistry, organic synthesis and homogeneous catalysis. 吡啶基含氮三齿配体具有良好的稳定性和反应活性,在配位化学,有机合成和均相催化中均得到了广泛的应用。
Catalyst selenium combined advantages from heterogeneous catalysis and homogeneous catalysis is a typical example of reaction process transfer catalysis. 催化剂硒在催化反应中表现出反应过程相转移的特性,兼具了多相催化与均相催化的优点,是反应过程相转移概念中的典型实例。
Present Situation of Study on Homogeneous Catalysis Property of Biomimetic Oxygen Carrier 仿生氧载体均相催化性能研究现状
New method of synthesizing dimethyl carbonate by urea and methanol in homogeneous catalysis system 尿素甲醇均相催化合成碳酸二甲酯的新方法
As we know, homogeneous processes are characterized by both high catalytic activity and high selectivity. In turn, homogeneous catalysis has been widely applied in many fields. 众所周知,均相催化剂由于反应活性高、产物选择性好,因此被广泛应用于诸多领域。
Because the homogeneous catalysis has a series of problems, such as product separation difficulty and catalyst recovery difficulty, the heterogeneous catalysis was studied preliminarily. 由于均相催化存在产品分离困难、催化剂难以回收等问题,本论文对多相催化进行了初步研究。
Homogeneous catalysis transesterification to produce biodiesel is the most used technology, but it is difficult to separate catalyst from products and catalyst wastewater cause pollution of the environment and other issues. 均相催化酯交换反应是目前制备生物柴油采用最多的工艺,然而均相催化酯交换法却存在着产品和催化剂难分离、排放催化剂废水污染环境等问题。
There are many methods to prepare biodiesel, such as homogeneous catalysis method, solid phase catalysis method and supercritical flow method. 而生物柴油的制备有均相催化法、固相催化法和超临界流动法。
In order to overcome these problems, immobilization of the homogeneous catalysis to produce recoverable and recyclable catalysts have been intensively studied. 为了克服这些问题,均相催化剂的各类固载化被广泛研究。
Currently, they use a homogeneous catalysis to prepare biodiesel in domestic and international, such as liquid acid and alkali as a catalyst. 目前,对于国内外大多采用均相催化法制备生物柴油,如液体酸和液体碱作为催化剂。
However, it is pity that expensive metalloporphyrins in homogeneous catalysis system can not be reused further, resulting in high cost in practical industry. 但是,在均相催化氧化体系中金属卟啉无法回收再利用,造成昂贵金属卟啉的浪费。
Among of these carried-ligands, soluble polymer-supported ligands, which combine the advantages of homogeneous catalysis with the easy separation, have achieved good catalytic activity and enantioselectivity. 其中可溶性高聚物负载配体将易于回收的优点与均相催化的高活性相结合,得到了较高的催化活性和立体选择性。
The preparation of biodiesel mainly uses transesterification. Present used catalysts are homogeneous acid or alkali, but saponification reaction easily happens and separation between products and catalysts are difficult in homogeneous catalysis. 生物柴油制备方法主要采用酯交换反应,目前多使用的催化剂以均相酸或碱为主,但是均相催化反应易发生皂化反应且产物与催化剂难以分离。