| 1. | Thus it becomes an economic tradeoff which must be evaluated for each catalyst system if optimum results are to be obtained .
这就成为一个经济性权衡的问题，要想得到最佳化成果，就必须对每一个催化剂系统进行评价。 |
| 2. | Twc three way catalyst system
三元催化系统 |
| 3. | Dual - catalyst system
双重催化系统 |
| 4. | Large - sized catalyst system : voc catalyst regeneration environmental protection deodorization catalyst substance peoples livelihood environmental protection catalyst scr de - nox peel saltpeter catalyst voc organic volatility gas dealing with catalyst
大型触媒系统： voc触媒再生、环保除臭触媒担体、民生环保触媒、 scr de - nox脱硝触媒、 voc有机挥发性气体处理触媒 |
| 5. | Progresses in research on asymmetric hydrocyanation , asymmetric hydroformylation , asymmetric cross - coupling reaction and asymmetric hydrosilylation catalized by palladium - chiral phosphine - catalyst systems are reviewed with 36 references
综述了钯手性膦配体催化剂在烯烃的不对称氢氰化、不对称羰基化、不对称交叉偶联、不对称氢化硅氢化等方面的研究进展。参考文献36篇。 |
| 6. | Progresses in research on asymmetric hydrocyanation , asymmetric hydroformylation , asymmetric cross - coupling reaction and asymmetric hydrosilylation catalized by palladium - chiral phosphine - catalyst systems are reviewed with 36 references
摘要综述了钯手性膦配体催化剂在烯烃的不对称氢氰化、不对称羰基化、不对称交叉偶联、不对称氢化硅氢化等方面的研究进展。参考文献36篇。 |
| 7. | However the binary catalysts system favors low residue content . it was found that the residue content were remained at a low level with ethylene glycol as the reaction media and 6 % ( by mass ) of sulfuric acid as the catalyst in the presence of phenol . the contents of lipophilic products were investigated
经凝胶色谱法测定表明，以浓硫酸苯酚为催化剂、乙二醇为反应介质的反应体系，所得到液化产物的平均相对分子质量最低， m _ w为806 ， m _ n为799 。 |
| 8. | Abstract : polyphenylacetylenes were synthesized by rn ( nbd ) cl 2 and wcl6 / ph4sn catalyst systems in n2 at room temperature . polymers with high yield and high molecular weight were obtained . their structures were characterized by uv , ir , nmr and gpc , respectively . the fluorescence of the polymer solution with different concentration was investigated using variable excitation wavelength from uv to visible region . the relation between fluorescence and polymer structure was studied . the results showed that the molecular chain structure has great influence on fluorescence of the polymers . the emitting peak wavelength of fluorescence for the polymer of high stereoregularity is independent of solution concentration and excitation wavelength . the emitting peak wavelength of fluorescence for the polymer with disordered molecular chain arrangement varies with changing the solution concentration and excitation wavelength , and different emission sites in molecular chains and low emitting yield are shown . the measurement and analysis of fluorescence spectroscopy of polyphenylacetylenes may provide some useful information to judge the molecular chain arrangement in some conjugated polymers
文摘:使用有机金属铑、金属钨/四苯基锡催化剂体系聚合苯乙炔，分别获得了高产率和高分子量的聚苯乙炔.使用uv ， ir ， nmr ， gpc等分别对聚合物结构进行了表征.采用不同波长的激发光对聚合物荧光性能进行研究，详细分析了聚合物结构与荧光性能之间的关系.研究结果发现，不同聚合物结构对聚合物荧光性能产生很大影响，规整性高的聚合物，将有较高的发光量子效率；聚合物规整性差，将可能导致多个荧光发光结构点，其荧光强度降低.聚合物荧光光谱研究将对某些共轭聚合物结构的规整性分析提供一些有用的信息 |
| 9. | Applications of room temperature ionic liquids as a classification of green solvents and a catalyst system in the fields such as separation process , chemical reaction . electrolysis chemistry are introduced ; meanwhile ionic liquids can also he used as lubricating materials , sensitive materials , energy - storage materials and optical materials
摘要介绍了室温离子液体作为一类绿色溶剂和催化剂体系在分离过程、化学反应、电化学等领域的应用情况；同时离子液体还可以作为润滑材料、敏感材料、储能材料和光学材料。 |
