反应选择性
- 网络Reaction selectivity
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优化结果表明,反应选择性可提高2%以上。
The optimization results indicated that the reaction selectivity increased by over 2 % .
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搅拌槽内加料方式对反应选择性影响的研究
Study on the Influence of Feed Methods on the Reaction Selectivity in Stirred Tank
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温度对脂肪酸甲醋的臭氧化反应选择性(K)有影响。
Temperature also has great influence to the reaction .
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羟基化合物对Fenton反应选择性的影响研究
Effect of compounds with hydroxyl on Fenton reagent selection
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水和氧在电解银表面上存在着竞争吸附,水的加入能抑制甲醇氧化为甲醛的副产物CO2的产生,提高反应选择性。
It has also been found that there exists competitive adsorption between water and oxygen on silver and water can increase the selectivity of methanol oxidation to formaldehyde .
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利用β-环糊精对底物的包络作用,经由Fries重排反应选择性合成了邻羟基苯乙酮。
Using the inclusion action of β - Cyclodextrin with phenyl acetate , 2-Hydroxy-acetophenone was Synthesized via Fries rearrangement reaction .
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结果与结论3种方法中,采用氢溴酸作催化剂的反应选择性最高,收率达到95.67%,产物结构经1H-NMR和EI-MS确证。
The optimal catalyst was HBr with a highest selectivity and yield of 95.67 % . The structure of emodin synthesized was characterized by 1H-NMR and EI-MS.
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在水介质中,以Pd/C为催化剂,考察了不同种类助催化剂对催化加氢法制备4,4′-二氨基二苯乙烯-2,2′-二磺酸(DSD酸)反应选择性的影响。
The effect of a series of catalyst promoters on selectivity in preparation of 4,4 ' - diaminostilbene-2,2 ' - disulfonic acid ( DSD acid ) was studied by catalytic hydrogenation using palladium-carbon as the catalyst in aqueous medium .
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研究表明,Fukui函数不是决定反应选择性的唯一因素,而局域意义的软硬酸碱原理可用来理解此类反应性。
According to our study , the Fukui function is not the only factor to determine the selectivity of a chemical reaction , while the principle of hard and soft acid and base in a local sense can be used to understand this kind of reactivity .
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反相微乳液中苯酚硝化反应选择性的研究
Study of the selectivity of phenol nitration reaction in reverse microemulsion
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特戊酰氯在全回流填料塔内一氯化反应选择性的研究
Selectivity of Monochlorination of Pivaloyl Chloride Utilizing Total Reflux Packed Column
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内扩散对连续反应选择性影响的计算机模拟
Inner Diffusion on Selectivity of Consecutive Reaction by Computer Simulation
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提高复合反应选择性的措施
The methods to improve the selectivity of complex reaction
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萃取剂伴生,环己烯反应选择性高。
Co-production of extractant in reaction resulted in high selectivity of cyclohexene reaction .
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该反应选择性高,操作简便。
This reaction was easily manipulated and high regioselective .
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电环化反应选择性规律的一种新解释&轨道转化-电子填充法
A new method for the explaining of electrocyclic reaction Orbital conversion electron filling
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有机合成反应选择性及其控制策略
Selectivity and Their Controlled Strategies in the Organic Synthesis
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烷烃卤代反应选择性的讨论
Discussion of the Selectivity of Alkane Halogenation Reaction
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溶剂对有机反应选择性影响
Effect of Slovents on Selectivity to Organic Reaction
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该显色反应选择性好。
This reaction has good selectivity .
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得出了反应选择性预测模型。经优化计算,按给出的操作参数优化值改善操作工况,收到了显著的经济效益。
Through optimization calculation , operation of the reactor was improved and good economic result achieved .
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本工作旨在研究铁、钯等过渡金属催化的反应选择性控制。
This thesis focuses on the selective control of iron , palladium and other transition metal-catalyzed reactions .
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利用计算机编程绘制出内扩散对连续反应选择性的影响图。
Using computer programme , the effect element figure of inner diffusion on selectivity of consecutive reaction is drawn .
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烯酸络合物碳阳离子的前沿轨道系数愈大,反应选择性愈高。本文还初步讨论了环取代反应和醚生成反应之间的相互关系。
The larger the molecular orbital coefficent of the acid-olefine complex is , the higher the selectivity of the reaction will be .
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本文分析了活性具有δ&函数分布的多孔球形催化剂对多组分平行竞争反应选择性的影响。
The influences of spherical catalyst pellets with δ - function activity profiles on the selectivity of multi-component parallel reactions were studied .
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但随温度的进一步增大,水蒸气的反应选择性减弱,不利于焦油的产生。
However , with further increasing of temperature , the reaction selectivity of steam was abated , which prejudiced the production of tar .
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结果表明,在转化率为80%以前有良好的反应选择性,副反应可忽略不计。
As the conversion is below 80 % , the selectivity shown is good , and any negligible side reactions present may not be considered .
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这种方法简单,反应选择性好,副产物少,因此易于分离提纯,并且普遍适用于不同金属、取代基相似的酞菁。
The method has good selectivity with fewer by-products and was easy to be purified . The method was suitable for different phthalocyanines with similar structure and various metals .
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近年来,出现了一些提高复合反应选择性的新方法,如:超临界反应、膜反应、反应精馏等。
Recently , some new methods , such as supercritical chemical reaction , membrane reaction , and reactive distillation , have been applied to improve the selectivity of complex reaction .
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乙醇与β-环糊精的协同作用,使1,4-二羟基蒽醌-Be体系荧光强度提高10倍以上,反应选择性有所改善。
The concurrent action of alcohol and β - cyclodextrin enhances the fluorescence intensity of 1 , 4-dihydroxyanthraquinone-beryllium system by a factor of more than ten and improves the selectivity of the reaction remarkably .