Suppr超能文献

过氧单体制备及其在氯酚催化过氧化反应中的活性和选择性。

The activity and selectivity of catalytic peroxide oxidation of chlorophenols over Cu-Al hydrotalcite/clay composite.

机构信息

Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.

出版信息

J Colloid Interface Sci. 2011 May 15;357(2):447-52. doi: 10.1016/j.jcis.2011.01.099. Epub 2011 Feb 3.

Abstract

Liquid phase catalytic oxidation of chlorophenols (CPs) was carried out over Cu-Al hydrotalcite/clay composite at ambient temperature and pressure using hydrogen peroxide as oxidant. The results showed that the catalyst had high catalytic activity, with complete oxidation of 4-CP within 40 min at 40 °C. The content and position of chlorine on the aromatic ring had significantly different effects on the oxidation rate of CPs, with the rate sequence of phenol > monochlorophenol (MCP) > dichlorophenol (DCP) > trichlorophenol (TCP), 3-CP > 2-CP > 4-CP, and 3,5-DCP > 3,4-DCP > 2,5-DCP > 2,4-DCP > 2,6-DCP. This was ascribed to the interactions among σ-electron withdrawing conductive effect, π-electron donating conjugative effect, and steric hindrance effect of chlorine. It was evidenced that the catalytic peroxide oxidation of CPs in the first step was selective and rate-limiting, where chlorinated 1,4-benzoquinones formed.

摘要

在环境温度和压力下,用过氧化氢作为氧化剂,在 Cu-Al 水滑石/粘土复合材料上进行了氯酚(CPs)的液相催化氧化。结果表明,该催化剂具有很高的催化活性,在 40°C 下 40 分钟内即可完全氧化 4-CP。芳环上氯的含量和位置对 CPs 的氧化速率有显著不同的影响,速率顺序为苯酚>单氯酚(MCP)>二氯酚(DCP)>三氯酚(TCP),3-CP>2-CP>4-CP,以及 3,5-DCP>3,4-DCP>2,5-DCP>2,4-DCP>2,6-DCP。这归因于氯的σ-电子吸电子导电效应、π-电子给体共轭效应和空间位阻效应之间的相互作用。有证据表明,CPs 的催化过氧化物氧化在第一步是选择性的和速率限制的,其中形成了氯化 1,4-苯醌。

相似文献

1
The activity and selectivity of catalytic peroxide oxidation of chlorophenols over Cu-Al hydrotalcite/clay composite.
J Colloid Interface Sci. 2011 May 15;357(2):447-52. doi: 10.1016/j.jcis.2011.01.099. Epub 2011 Feb 3.
2
Copper nanoparticles on hydrotalcite as a heterogeneous catalyst for oxidant-free dehydrogenation of alcohols.
Chem Commun (Camb). 2008 Oct 21(39):4804-6. doi: 10.1039/b809012b. Epub 2008 Aug 12.
3
CuO impregnated activated carbon for catalytic wet peroxide oxidation of phenol.
J Hazard Mater. 2009 Dec 15;172(1):498-506. doi: 10.1016/j.jhazmat.2009.07.012. Epub 2009 Jul 10.
4
Preparation of Fe-Cu-kaolinite for catalytic wet peroxide oxidation of 4-chlorophenol.
Environ Sci Pollut Res Int. 2018 Feb;25(5):4924-4933. doi: 10.1007/s11356-017-0859-4. Epub 2017 Dec 4.
10
Pd-Al pillared clays as catalysts for the hydrodechlorination of 4-chlorophenol in aqueous phase.
J Hazard Mater. 2009 Dec 15;172(1):214-23. doi: 10.1016/j.jhazmat.2009.06.161. Epub 2009 Jul 5.

引用本文的文献

1
Preparation of Fe-Cu-kaolinite for catalytic wet peroxide oxidation of 4-chlorophenol.
Environ Sci Pollut Res Int. 2018 Feb;25(5):4924-4933. doi: 10.1007/s11356-017-0859-4. Epub 2017 Dec 4.

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验