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苯酚羟基化

苯酚羟基化的相关文献在1995年到2022年内共计160篇,主要集中在化学、化学工业、石油、天然气工业 等领域,其中期刊论文67篇、会议论文6篇、专利文献586456篇;相关期刊40种,包括实验技术与管理、石油化工、石油学报(石油加工)等; 相关会议6种,包括中国无机盐工业协会过氧化物分会2011年行业年会、第七届全国催化剂制备科学与技术研讨会、第三届中国膜科学与技术报告会等;苯酚羟基化的相关文献由320位作者贡献,包括朱斌、林民、史春风等。

苯酚羟基化—发文量

期刊论文>

论文:67 占比:0.01%

会议论文>

论文:6 占比:0.00%

专利文献>

论文:586456 占比:99.99%

总计:586529篇

苯酚羟基化—发文趋势图

苯酚羟基化

-研究学者

  • 朱斌
  • 林民
  • 史春风
  • 徐成华
  • 孔岩
  • 张春雷
  • 冯良荣
  • 邱发礼
  • 陈春霞
  • 吕强
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 赵新红; 杨志刚; 苏娜; 张晓晓
    • 摘要: 铁基沸石分子筛催化苯酚直接羟基化制备苯二酚反应,具有原料低廉、反应条件温和、合成路线简单和过程绿色环保等优势,近些年来逐渐成为研究的热点.主要分析苯酚羟基化反应中诱导期、催化活性、选择性和稳定性等与铁基沸石催化剂结构性质之间的关系.比较苯酚羟基化反应的各种机理.探讨反应温度、反应时间、溶剂、催化剂用量、过氧化氢与苯酚物质的量比和pH值等工艺条件对苯酚羟基化反应的影响.并且对该反应的应用前景和研究趋势进行了展望.
    • 王泳娟; 周钰明; 贺强
    • 摘要: 该文设计了锆掺杂介孔氧化铝的制备、表征及其苯酚羟基化反应性能的研究性综合设计型实验.对实际工业应用中催化剂高成本、低活性等问题展开研究,通过溶剂蒸发诱导自组装(EISA)法一步制备了锆掺杂的介孔氧化铝材料;采用X射线衍射仪、氮气吸附脱附仪、高分辨透射电子显微镜等对其物相性质、结构特征进行系统表征;通过苯酚羟基化反应过程来考察其催化反应活性,并利用重复性实验来研究其反应稳定性.本实验针对性强、设计新颖、操作简单,实验内容涵盖材料合成、结构表征、催化性能等多个知识点.教学实践表明,该综合研究实验能够全面培养学生的综合素质和创新能力,有助于学生建立对实验室实验到实际工业生产过程的认识.
    • 赵新红; 郝志鑫; 张晓晓; 段维婷; 王清鹏
    • 摘要: 在文献中所报道AEL型分子筛无溶剂合成法的基础上,引入低温预处理、机械化学预处理、晶种和双氧水等合成变量进行具有特定形貌或孔结构的高结晶度的FeAPO-11分子筛的合成,并将制备的分子筛作为催化剂应用于苯酚的羟基化反应中.采用XRD、SEM、氮气物理吸脱附以及紫外可见漫反射光谱(UV-Vis DRS)等手段对FeAPO-11分子筛进行表征,深入探讨了催化剂上铁元素含量、铁物种分布和比表面积等因素对苯酚羟基化反应的影响.结果表明,低温预处理和双氧水的引入能显著提高FeAPO-11分子筛的结晶度,在特定条件下能制备出具有规则纳米晶聚集体形貌的FeAPO-11分子筛.催化结果表明,苯酚羟基化反应的诱导期长短主要取决于FeAPO-11催化剂中非骨架铁形式的多核铁的含量.在被考察的5个催化剂中,FeAPO-11-LHSB由于具有规则的纳米晶聚集体形貌、高的外表面积及骨架铁含量,在苯酚羟基化反应中展示出最优的性能,其苯二酚的产率和选择性分别为33.6%和67.6%.%Based on the solvent-free synthesis method of AEL-type molecular sieves in the literature, FeAPO-11 molecular sieves with high crystallinity, specific morphology or pore structure were synthesized by introducing some additional synthetic variables, including low temperature pretreatment, mechanochemical pretreatment, seed crystals and hydrogen peroxide.Their catalytic performance was investigated using phenol hydroxylation as a probe reaction.The synthesized FeAPO-11 molecular sieves were further characterized by XRD, SEM, N2 physisorption and UV-Vis DRS.Moreover, the effects of content and distribution of Fe species, and surface area of the catalysts on the phenol hydroxylation reaction were thoroughly studied.Characterization results indicate that combination of low temperature pretreatment and hydrogen peroxide can significantly improve the crystallinity of FeAPO-11 zeolite.Especially, under some specific conditions, FeAPO-11 molecular sieve with uniform nanocrystalline aggregates morphology can be successfully prepared.The catalytic reaction results suggest that the induction period of phenol hydroxylation reaction is mainly determined by the amount of multi-nuclear iron in the form of non-framework iron species in FeAPO-11 catalysts. Among the five selected catalysts, due to its regular nanocrystalline aggregates morphology, high external surface area and high iron content in the framework, FeAPO-11-LHSB exhibites the best performance with 33.6% dihydroxybenzene yield and 67.6% selectivity.
    • 赵福桐; 李成龙; 高文艺; 吕雪川; 焦玉娟; 高肖汉
    • 摘要: 邻苯二酚和对苯二酚是重要的精细化工中间体,在各个行业中具有广泛的应用.苯酚与过氧化氢反应合成苯二酚是一条反应条件温和、环境友好的合成路线,该合成路线的关键是催化剂的选择和反应条件的优化.本文以铁改性的HMS分子筛为催化剂,研究了金属负载量、催化剂使用量、反应温度、反应时间等因素对催化性能的影响,优化了反应条件.以水为溶剂,n(Fe)∶n(Si) =0.04,n(苯酚)∶n(H2O2) =2∶1,反应温度50°C,催化剂用量0.1g,反应4h,苯酚的转化率达45.5%,苯二酚选择性为94.9%.N2吸附-脱附结果表明,Fe/HMS具有良好的介孔结构,铁进入HMS材料的骨架中,并且催化剂具有良好的稳定性,循环使用后骨架保持完整.
    • 陶明; 刘华彦; 俞喆雷; 陈银飞
    • 摘要: Using commercially available TS-1 molecular sieve as the active component,cordierite ceramic honeycomb as the carrier and silica sol (30% aqueous solution) as a binder,TS-1/cordierite monolithic catalyst was prepared by coating method.The as-prepared catalyst was used to catalyze hydroxylation of phenol with hydrogen peroxide(30% aqueous solution).The effects of reaction temperatures,reaction time,TS-1 loading and molar ratios of phenol to hydrogen peroxide on hydroxylation of phenol were investigated in a homemade external circulation-forced batch reactor.The results showed that firmness was greatly improved after adding the silica sol.Under the condition of water as the solvent,n(phenol)∶n(H2O2)=3∶1,m(H2O)∶m(phenol)=5∶1,m(phenol)∶m(TS-1)=10∶1,reaction temperature 60 °C and reaction time 6 h,phenol conversion and the selectivity to hydroquinone reached 28.3% and 93.2%,respectively.%以市售TS-1分子筛为活性组分,蜂窝状堇青石陶瓷为载体,硅溶胶(30%水溶液)为黏结剂,采用涂覆法制备TS-1/堇青石整体催化剂,并用于催化苯酚和过氧化氢(30%水溶液)的羟基化反应.在自制强制外循环间歇反应器中考察反应温度、反应时间、TS-1负载量和n(苯酚)∶n(过氧化氢)等对苯酚羟基化的影响.结果表明,添加硅溶胶后,牢固度有了很大提高.在以水为溶剂、n(苯酚)∶n(过氧化氢)=3∶1、m(H2O)∶m(苯酚)=5∶1、m(苯酚)∶m(TS-1)=10∶1和60 °C条件下反应6 h,苯酚转化率为28.3%,苯二酚选择性为93.2%.
    • 冯惠生; 钟鑫; 何丽娟; 孙德章; 罗彬彬
    • 摘要: Fe-D72 resin was prepared by the ion exchange process between iron ions and D72 resin.It was applied to the phenol hydroxylation with H2 O2.The effects of different reaction conditions such as the iron capacity of catalyst,reaction temperature,reaction time,catalyst dosage,molar ratio of H2O2to phenol were investigated.The orthogonal experiment was carried out to get the best optimized operating conditions.Under the conditions of iron capacity as 95.4 mg.g-1,reaction temperature as 70 °C,reactiontime as 1 h,catalyst dosage as 0.1 g,molar ratio of H2O2 to phenol as 1:1,42.4% phenol conversion was obtained with benzenediol selectivity being 94.1%.The reusability of prepared catalyst illustrated that it could be recovered and reused without notable loss of activity.%利用D72离子交换树脂作为载体与铁离子进行离子交换制备Fe-D72树脂催化剂,将其运用到苯酚羟基化反应中.通过单因素法研究催化剂的含铁量、反应温度、反应时间、催化剂用量、苯酚(PH)/过氧化氢(H2O2)物质的量之比对苯酚羟基化反应的影响;采用L9(34)正交表设计正交试验,结果表明:n(PH)(H2O2)和反应温度对苯二酚收率的影响最大;在考察的正交范围内,n(PH)(H2O2) =1,反应温度为70°C,反应时间为1h,催化剂量为0.1g时催化效果最好,此时苯酚转化率为42.4%,苯二酚选择性为94.1%,苯二酚收率为39.8%.Fe-D72催化剂连续重复利用4次,催化稳定性较好.
    • 赵玉梅
    • 摘要: 调节pH值合成不同铁含量的Fe-SBA-16-x-y介孔分子筛.采用X射线衍射、N2物理吸附-脱附、FT-IR、UV-vis对样品结构进行表征,并通过苯酚羟基化反应考查其催化活性.结果表明:合成的Fe-SBA-16-x-y催化剂保持了SBA-16介孔分子筛的有序结构和高的比表面积,且铁成功地引入到分子筛的骨架中.当反应温度为65°C,反应时间为2h,苯酚:双氧水为1:0.4时,Fe-SBA-16-50-3催化活性较好.
    • 席涛; 马红蕾; 张颖杰; 陈强; 孔岩
    • 摘要: 以表面活性剂为苯酚增溶剂,水为溶剂,H2 O2为氧化剂,0.5B-0.5Cr-4Fe-MCM-41为催化剂,催化苯酚羟基化反应合成苯二酚,考察了表面活性剂种类、苯酚在水中的质量分数(m(Phenol)/(m(Phenol) +m(H2O)))、苯酚与H2 O2的摩尔比(n(Phenol) (H2O2))、反应温度对该反应的影响.结果表明,在以十二烷基磺酸钠为增溶剂、m(Phenol)/(m(Phenol) +m(H2O)) =0.30、n(Phenol)(H2 O2)=3、反应温度25°C、反应时间2h的条件下,苯酚羟基化反应的苯酚转化率达到24.2%,苯二酚的选择性达到94.8%,且0.5B-0.5Cr-4Fe-MCM-41催化剂具有良好的重复使用性能,基本满足工业化要求.
    • 赵玉梅
    • 摘要: Fe-SBA-1 6 with different Fe were prepared under direct hydrothermal crystallization using tetraethyl orthosilicate as silica source,and the F127 as template.The structure was characterized with XRD,N2 adsorption-desorption,FTIR and UV-vis.The catalytic activities of Fe-SBA-1 6 for phenol hydroxylation was investigated using H2 O as solvent and H2 O2 as oxidant.The effects of the various reaction conditions including temperature,time,molar ratio of reactants and the amount of the catalyst on the yield of catechol and hydroquinone were studied. The results showed that all samples maintain the cubic cage-1 ike structure of mesoporous SBA-1 6 with a cubic symmetry, pore structure, high surface area.The Fe was successfully incorporated into the framework of SBA-16.Fe-SBA-16 with Si/Fe=30 showed excellent has higher activity and selectivity in phenol hydroxylation.The conversion of phenol was 30.8% at 65°C for 2h and n (Phenol) (H2 O2 )=1∶0.4.The selectivity to catechol and hydroquinone reached 64.3% and 30.5% respectively.%以正硅酸乙酯为硅源,F127为模板剂,采用水热合成法直接合成不同铁含量的 Fe-SBA-16分子筛。通过X射线衍射、N2物理吸附-脱附、红外光谱、紫外-可见漫反射光谱等分析手段对催化剂的结构进行表征。研究了Fe-SBA-16在以 H2 O 为溶剂,H2 O2为氧化剂的苯酚羟基化反应中的催化活性并考察了不同的反应条件(Fe 含量、反应温度、反应时间、催化剂用量、反应物配比)对催化性能的影响。结果表明,在一定铁含量的条件下合成出的 Fe-SBA-16样品均保持了 SBA-16介孔分子筛的立方笼状介孔结构和高的比表面积,且 Fe 被成功地引入到 SBA-16骨架上。当 Si/Fe=30时,Fe-SBA-16催化剂表现出良好的催化活性和选择性。反应温度为65°C,反应时间为2h,苯酚∶双氧水为1∶0.4时催化活性最好,苯酚的转化率为30.8%,邻苯二酚与对苯二酚的选择性分别为64.3%与30.5%。
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