• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Sustainable oxidation of cyclohexane catalyzed by a VO(acac)2-oxalic acid tandem: the electrochemical motive of the process efficiency
【24h】

Sustainable oxidation of cyclohexane catalyzed by a VO(acac)2-oxalic acid tandem: the electrochemical motive of the process efficiency

机译：vo（acac）2-草酸催化的可持续氧化催化催化：工艺效率的电化学动力

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Cyclohexane oxidation by H _(2) O _(2) to cyclohexanol, cyclohexanone, and cyclohexylhydroperoxide under mild (40 °C, 1 atm) conditions is significantly enhanced in the system composed of VO(acac) _(2) (starting catalyst) and small additives of oxalic acid (process promoter). In corroboration of this, several times higher yield of the desired products was obtained compared to that obtained in the acid-free process. The revealed advantage was addressed to elevate the electrical conductance G (or vice versa , decreasing the resistance, 1/ G ) of the reaction medium. On the other hand, the content of oxalic acid (20–30 mM) was compulsory to optimize the process parameters. The last value of concentration affords, besides the lowest 1/ G , the utmost impact on pH, redox potential, and current–voltage relationships. Exceeding this level leads to an increase in 1/ G of the reaction solution, ceases the impact on pH, ORP, and CV profiles, and is detrimental for the product yield. The putative mechanism of the revealed effects has been envisaged.
机译：在VO（ACAC）_（2）组成的系统中，在温和（40℃，1atm）条件下，通过H _（2）O _（2）至环己醇，环己酮和环己基氢氧化酯的环己烷氧化在系统中显着增强（起始催化剂）和草酸的小添加剂（工艺启动子）。在粗化的情况下，与在无酸过程中获得的相比，获得了所需产物的几倍的产量。已经解决了揭示的优点以提高反应介质的电导克（反之亦然，降低抗性，1 / g）。另一方面，草酸（20-30mm）的含量是强制性的，以优化工艺参数。除了最低1 / g之外，浓度的最后值为1 / g，对pH，氧化还原电位和电流 - 电压关系的最大影响。超过该水平导致1 / g的反应溶液的增加，停止对pH，ORP和CV型材的影响，并且对产物产率有害。设想了揭示效应的推定机制。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号