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化工进展  2015 

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, PP. 3476-3480

Keywords: 催化剂,还原,铁粉,电解

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Abstract:

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)=13,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。

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