以Ce3+/Ce4+为媒质间接电合成1,4-萘醌

doi:10.3969/j.issn.0438-1157.2013.01.038

化工学报 ›› 2013, Vol. 64 ›› Issue (1): 334-339.DOI: 10.3969/j.issn.0438-1157.2013.01.038

以Ce³⁺/Ce⁴⁺为媒质间接电合成1,4-萘醌

李照华, 褚有群, 马淳安

浙江工业大学化学工程与材料学院,绿色化学合成技术国家重点实验室培育基地,浙江杭州 310032

收稿日期:2012-08-06 修回日期:2012-11-06 出版日期:2013-01-05 发布日期:2013-01-05
通讯作者: 马淳安
作者简介:李照华(1986—),男,博士研究生。
基金资助:
国家重点基础研究发展计划项目(2012CB722604);浙江省自然科学基金项目(LY12B03004); 浙江省研究生教育创新示范基地基金项目(1001)。

Indirect electrochemical synthesis of 1,4-naphthoquinone mediated by Ce³⁺/Ce⁴⁺

LI Zhaohua, CHU Youqun, MA Chun'an

School of Chemical Engineering and Materials Science, Zhejiang University of Technology, State Key Laboratory of Green Chemistry-Synthesis Technology, Hangzhou 310032, Zhejiang, China

Received:2012-08-06 Revised:2012-11-06 Online:2013-01-05 Published:2013-01-05
Supported by:
supported by the National Basic Research Program of China (2012CB722604), the Natural Science Foundation of Zhejiang Province (LY12B03004) and the Foundation of Graduate Educational Innovation Base of Zhejiang Province (1001).

摘要/Abstract

摘要： 探讨了以Ce³⁺/Ce⁴⁺为媒质的1,4-萘醌间接电化学合成反应。考察了液相氧化、Ce³⁺电解氧化过程的影响因素,并进行了萘醌的间接电合成实验。结果发现,硫酸浓度、溶液温度对铈离子的氧化能力和电化学反应活性具有重要的影响;当温度为70℃、硫酸浓度为1.0 mol·L^-1时,液相氧化反应的收率最高(85.8%)。Ce³⁺电解氧化的最优条件为:电流密度50 mA·cm^-2、硫酸浓度1.0 mol·L^-1、温度为50℃,其电流效率可达90.6%;间接电合成实验过程中萘醌的平均收率达85.7%,Ce³⁺电解氧化的平均电流效率达87.8%,并且电解过程具有良好的稳定性,表明该技术具有良好的产业化应用前景。

关键词: 萘醌, 间接电合成, 媒质, 铈离子

Abstract: Indirect electrochemical synthesis of 1,4-naphthoquinone was studied by using Ce³⁺/Ce⁴⁺ as mediator.The influence factors related to the processes of liquid phase oxidation of naphthalene and electrochemical oxidation of Ce³⁺ were investigated, and indirect electrochemical synthesis of 1,4-naphthoquinone was also conducted.The experimental results showed that concentrations of H₂SO₄ and solution temperature had significant influence on oxidative ability and electrochemical reactivity of cerium ions.The highest yield of 1,4-naphthoquinone (85.8%) could be obtained during liquid phase oxidation in 1.0 mol·L^-1 H₂SO₄ at 70℃.The current efficiency of electrochemical oxidation of Ce³⁺ could reach up to 90.6% with current density of 50 mA·cm^-2 in 1.0 mol·L^-1 H₂SO₄ at 50℃.Excellent results were achieved during indirect electrochemical synthesis of 1,4-naphthoquinone.The tests were cycled for six times, and average yield of 1,4-naphthoquinone and current efficiency of electrochemical oxidation of Ce³⁺ were 85.7% and 87.8% respectively.These indicated that this technology could have a good prospect of commercialization.

Key words: naphthoquinone, indirect electrochemical synthesis, medium, cerium

中图分类号:

TQ15

李照华, 褚有群, 马淳安. 以Ce³⁺/Ce⁴⁺为媒质间接电合成1,4-萘醌[J]. 化工学报, 2013, 64(1): 334-339.

LI Zhaohua, CHU Youqun, MA Chun'an. Indirect electrochemical synthesis of 1,4-naphthoquinone mediated by Ce³⁺/Ce⁴⁺[J]. CIESC Journal, 2013, 64(1): 334-339.

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以Ce³⁺/Ce⁴⁺为媒质间接电合成1,4-萘醌

Indirect electrochemical synthesis of 1,4-naphthoquinone mediated by Ce³⁺/Ce⁴⁺

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