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催化羟基化反应
相关语句
  catalytic hydroxylation
     Studies of the Influence of the Steric Effect on the Catalytic Hydroxylation of Cyclohexane by Iron Porphyrins
     铁卟啉的空间效应对其催化羟基化反应性能的影响
短句来源
     Recent Progress on Research and Development of Direct Catalytic Hydroxylation of Benzene and Phenol
     苯和苯酚直接催化羟基化反应研究新进展
短句来源
  “催化羟基化反应”译为未确定词的双语例句
     Study on Hydroxylation Reaction Catalyzed by Polyphenoloxidase in Nonaqueous Media
     非水介质中多酚氧化酶催化羟基化反应的研究
短句来源
  相似匹配句对
     STUDY ON HYDROXYLATION OF PHENOL BY INORGANIC CARRIER CATALYSIS
     无机物负载催化苯酚羟基化反应研究
短句来源
     STUDY ON HYDROXYLATION OF BENZENE WITH HYDROGEN PEROXIDE CATALYZED BY TITANIUM SILICALITE 1
     TS-1分子筛催化羟基化反应
短句来源
     CATALYTIC TITRATION
     催化滴定
短句来源
     catalyst A340;
     催化催化 ;
短句来源
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  catalytic hydroxylation
The isotope composition of carbon of ethyl alcohol obtained during catalytic hydroxylation of ethylene has a δ13C of -30.6 ± 0.3%..
      
The reaction of catalytic hydroxylation of olefins by organic hydroperoxides in the presence of osmium carbonyl clusters supported on polymer matrices is studied.
      
Comparative study of photo- and thermal catalytic hydroxylation of phenol with H2O2over TS-1
      
Liquid-Phase Catalytic Hydroxylation of Phenol Using Cu(II), Ni(II) and Zn(II) Complexes of Amidate Ligand Encapsulated in Zeoli
      
Dioxovanadium(V) Complexes of Dibasic Tridentate Ligands Encapsulated in Zeolite-Y for the Liquid Phase Catalytic Hydroxylation
      
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The paper reviews the progress in study of catalysis in the catalytic Hydroxylation of Phenol by Hydrogen Peroxide and generatiges that the essential tendency of catalyst's development is from simple homogeneous form to compound heterogeneous supported form. It is suggested that based on economical Fe-based complex catalysts is the important type.

本文综述了双氧水苯酚催化羟基化反应中催化剂的开发研究状况 ;概括了催化剂是从简单的、均相的形式向复合的、非均相的载体形式发展的基本趋势 ;提出了铁系复合型催化剂是经济的、有前途的催化剂形式

Recent advance in direct catalytic hydroxylation of benzene to phenol, phenol to pyrocatechol and hydroquinone were reviewed. The oxidants and a variety of heterogeneous catalysts for the catalytic hydroxylation system were remarked. Hydrogen peroxide was regarded as a green oxidant with soft reaction conditions and high oxidative efficiency. The development of new heterogeneous catalysts with high catalytic performance for hydroxylation with hydrogen peroxide is the key technology.

叙述了苯直接催化羟基化反应制苯酚、苯酚直接催化羟基化反应制苯二酚的研究 开发的最新进展,介绍了不同氧化剂的试验情况,评述了各类多相催化剂的研究开发成 果。H2O2作为苯及苯酚羟基化反应的氧化剂,具有反应条件温和,产物选择性高,对环境 无害等特点,成为工业催化领域中由苯直接羟基化反应制苯酚、苯酚直接羟基化反应制 苯二酚的主导氧化剂,开发高效的多相催化剂是该绿色合成技术的技术关键。

Using delamination of the ultra dilute montmorillonite (mmt) suspension and pillaring techniques, the mixed Fe-Al/montmorillonite (Fe-Al/mmt) composites with mesoporous structure have been synthesized. Powder X-ray diffraction (XRD), N2 adsorption-desorption isotherms, Fourier transform infrared spectroscopy (FTIR), UV-Vis-diffuse reflectance spectroscopy (UV-Vis-DRS) and catalytic hydroxylation of phenol with H2O2 were used to characterize the samples. The XRD results suggest that the content of Fe plays an...

Using delamination of the ultra dilute montmorillonite (mmt) suspension and pillaring techniques, the mixed Fe-Al/montmorillonite (Fe-Al/mmt) composites with mesoporous structure have been synthesized. Powder X-ray diffraction (XRD), N2 adsorption-desorption isotherms, Fourier transform infrared spectroscopy (FTIR), UV-Vis-diffuse reflectance spectroscopy (UV-Vis-DRS) and catalytic hydroxylation of phenol with H2O2 were used to characterize the samples. The XRD results suggest that the content of Fe plays an important role in the delaminating degree of mmt owing to flocculation of Fe-Al polyoxycations precursors. Only under lower molar ratio of 0.05 to 0.3 of Fe/(Fe+Al), can Fe-Al/mmt composites with the intercalated and occluded mixed thermally stable Fe-Al oxide particles up to 350 ℃ be obtained. Accordingly, the nitrogen sorption isotherms of resulting samples are of mesoporous type with hysteresis loops and narrow pore size distribution. The FTIR spectra preliminarily show the synthesized Fe-Al/mmt composites contain both Bronsted and Lewis acid sites. Lewis acid sites could be mainly provided and adjusted by intercalated/occluded mixed Fe-Al species. The UV-Vis-DRS spectra indicate the occurrence of clay Si-O → Fe and Al-O → Fe charge transfer transitions and interband transitions, leading to the characteristic broad absorbance and confirming the formation of mixed Fe-Al oxide in mmt aggregates. So it has been postulated that under experimental conditions, when the ultra dilute mmt suspension was used, the flocculation of mmt by pillaring Fe-Al polyoxycations could lead to delaminated aggregates, the "card-house" structure occluding in mixed Fe-Al polyoxycations species. The catalytic activity of phenol hydroxylation was at a ratio of Fe/(Fe+Al)=0.3 with phenol conversion of 36.7% and selectivity to hydroxylation products of 32.3%. The doping of alumina could improve the catalytic partial oxidation via adjustment of Fe/(Fe+Al) ratio and the surface acidity.

利用极稀悬浮液中蒙脱土的解离作用并结合柱化技术过程,制备了介孔结构的铝铁/蒙脱土复合材料(Fe-Al/mmt);并采用粉末X射线衍射、氮等温吸脱附、傅立叶红外光谱、紫外可见光漫反射光谱及苯酚催化羟基化反应表征了其结构和性能。结果显示,铁铝聚合前驱液中铁/铝比影响复合材料中蒙脱土的解离程度,且仅当低铁/铝比时(即Fe/(Fe+Al)物质的量的比介于0.05-0.3),嵌入解离的蒙脱土片层间的混合铁铝物种呈现能耐温350℃的热稳定性;氮等温吸脱附分析反映出这种解离的蒙脱土堆积结构呈现介孔特征,孔径分布窄,介于2.0-2.3nm;红外分析表明材料表面具有L酸和B酸位,并且L酸位量与嵌入解离的蒙脱土结构中的混合铁铝物种相关;由于结构中混合铁铝物种的存在及相应的Si-O→Fe、Al-O→Fe间的电子跃迁,Fe-Al/mmt材料在紫外区呈现宽泛的能量吸收特征。这些结果说明,由于混合铁铝物种嵌入于解离的蒙脱土片层堆积结构中,形成了“卡片屋”式介孔结构。实验条件下,Fe/(Fe+Al)物质的量的比为0.3的Fe-Al/mmt呈现较佳的催化羟基化性能,苯酚转化率为36.7%,二酚产物选择性32.3%;并且初步表明铝...

利用极稀悬浮液中蒙脱土的解离作用并结合柱化技术过程,制备了介孔结构的铝铁/蒙脱土复合材料(Fe-Al/mmt);并采用粉末X射线衍射、氮等温吸脱附、傅立叶红外光谱、紫外可见光漫反射光谱及苯酚催化羟基化反应表征了其结构和性能。结果显示,铁铝聚合前驱液中铁/铝比影响复合材料中蒙脱土的解离程度,且仅当低铁/铝比时(即Fe/(Fe+Al)物质的量的比介于0.05-0.3),嵌入解离的蒙脱土片层间的混合铁铝物种呈现能耐温350℃的热稳定性;氮等温吸脱附分析反映出这种解离的蒙脱土堆积结构呈现介孔特征,孔径分布窄,介于2.0-2.3nm;红外分析表明材料表面具有L酸和B酸位,并且L酸位量与嵌入解离的蒙脱土结构中的混合铁铝物种相关;由于结构中混合铁铝物种的存在及相应的Si-O→Fe、Al-O→Fe间的电子跃迁,Fe-Al/mmt材料在紫外区呈现宽泛的能量吸收特征。这些结果说明,由于混合铁铝物种嵌入于解离的蒙脱土片层堆积结构中,形成了“卡片屋”式介孔结构。实验条件下,Fe/(Fe+Al)物质的量的比为0.3的Fe-Al/mmt呈现较佳的催化羟基化性能,苯酚转化率为36.7%,二酚产物选择性32.3%;并且初步表明铝掺杂后,通过铁铝比和表面酸性的调整,材料的部分选择氧化性能可以得到改善。

 
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