电场强化铁粉还原对苯醌合成对苯二酚

doi:10.16085/j.issn.1000-6613.2015.09.043

化工进展 ›› 2015, Vol. 34 ›› Issue (09): 3476-3480.DOI: 10.16085/j.issn.1000-6613.2015.09.043

电场强化铁粉还原对苯醌合成对苯二酚

孙大贵¹, 刘业芳¹, 刘作华¹, 杜军¹, 范兴¹, 陶长元¹, 周小霞²

1. 重庆大学化学化工学院, 重庆 400044;
2. 第三军医大学化学教研室, 重庆 400038

收稿日期:2015-02-02 修回日期:2015-03-22 出版日期:2015-09-05 发布日期:2015-09-05
通讯作者: 刘作华,博士,教授,主要从事环境资源化工和化工工程强化方面的研究。E-mail:liuzuohua@cqu.edu.cn
作者简介:孙大贵(1954-),男,硕士,副教授,主要从事环境资源化工方面的研究。E-mail:daguisun@126.com
基金资助:
国家自然科学基金(31101447)及重庆市121科技支撑示范工程项目(kjzcsf28)。

Preparation of hydroquinone from p-benzoquinone intensified by reduction with iron powder under electric field

SUN Dagui¹, LIU Yefang¹, LIU Zuohua¹, DU Jun¹, FAN Xing¹, TAO Changyuan¹, ZHOU Xiaoxia²

1. School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China;
2. Chemistry Group, Third Military Medical University, Chongqing 400038, China

Received:2015-02-02 Revised:2015-03-22 Online:2015-09-05 Published:2015-09-05

摘要/Abstract

摘要： 研究了在酸性体系中,用电场强化铁粉还原对苯醌制对苯二酚的方法,该法考察了铁粉用量、硫酸用量、硫酸加入方式、电解电压和反应时间对铁粉利用率与对苯二酚收率的影响,并在此基础上探讨了还原机理。结果表明:电场强化了还原反应过程中电子的定向迁移,活化了反应物。此时,在95℃下,当硫酸与铁粉的摩尔比n(硫酸):n(铁粉)=1:3,采用逐步加入硫酸的方式,电解电压为3.0V,反应时间为2h时,铁粉利用率由28.57%提高到75.19%,对苯二酚收率达95%。与现有工艺相比,电场强化法的铁粉利用率高、还原过程无副产物,并且该法易于控制,反应周期短。

关键词: 催化剂, 还原, 铁粉, 电解

Abstract: Preparation of hydroquinone from p-benzoquinone intensified by reduction with iron powder was studied under electric field in the acidic system. The effects of dosage of iron powder,dosage of H₂SO₄,means of adding H₂SO₄,voltage and reaction time on the utilization ratio of iron powder and the yield of hydroquinone were investigated and the mechanism of the reaction process was studied. Electric field strengthened the electronic directional migration and activated iron powder in the reduction process. Optimal parameters were obtained with molar ratio of H₂SO₄/Fe 1:3 at 3.0V for 2h,and H₂SO₄ was added gradually. The utilization ratio of iron powder was increased from 28.57% to 75.19% and the yield of hydroquinone was up to 95%. Compared with the present industrial process,there was higher iron powder utilization and there was no reduction byproduct. Furthermore,the method was easy to control and could greatly shorten the reaction period.

Key words: catalysis, reduction, iron powder, electrolysis

中图分类号:

TQ243.1

孙大贵, 刘业芳, 刘作华, 杜军, 范兴, 陶长元, 周小霞. 电场强化铁粉还原对苯醌合成对苯二酚[J]. 化工进展, 2015, 34(09): 3476-3480.

SUN Dagui, LIU Yefang, LIU Zuohua, DU Jun, FAN Xing, TAO Changyuan, ZHOU Xiaoxia. Preparation of hydroquinone from p-benzoquinone intensified by reduction with iron powder under electric field[J]. Chemical Industry and Engineering Progree, 2015, 34(09): 3476-3480.

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电场强化铁粉还原对苯醌合成对苯二酚

Preparation of hydroquinone from p-benzoquinone intensified by reduction with iron powder under electric field

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