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首页> 外文期刊>RSC Advances >Highly selective conversion of guaiacol to tert-butylphenols in supercritical ethanol over a H2WO4 catalyst
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Highly selective conversion of guaiacol to tert-butylphenols in supercritical ethanol over a H2WO4 catalyst

机译：在H2WO4催化剂上高度选择性转化Guaiacol在超临界乙醇中叔丁基苯酚

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摘要

The conversion of guaiacol is examined at 300 degrees C in supercritical ethanol over a H2WO4 catalyst. Guaiacol is consumed completely, meanwhile, 16.7% aromatic ethers and 80.0% alkylphenols are obtained. Interestingly, tert-butylphenols are produced mainly with a high selectivity of 71.8%, and the overall selectivity of 2,6-di-tert-butylphenol and 2,6-di-tert-butyl-4-ethylphenol is as high as 63.7%. The experimental results indicate that catechol and 2-ethoxyphenol are the intermediates. Meanwhile, the WO3 sites play an important role in the conversion of guaiacol and the Bronsted acid sites on H2WO4 enhance the conversion and favour a high selectivity of the tert-butylphenols. The recycling tests show that the carbon deposition on the catalyst surface, the dehydration and partial reduction of the catalyst itself are responsible for the decay of the H2WO4 catalyst. Finally, the possible reaction pathways proposed involve the transetherification process and the alkylation process during guaiacol conversion.
机译：在H 2 O 4催化剂上以300摄氏度的超临界乙醇在300℃下检查Guaiacol的转化。同时，Guaiacol完全消耗，得到16.7％的芳族醚和80.0％的烷基酚。有趣的是，叔丁基苯酚主要具有71.8％的高选择性，以及2,6-二叔丁基苯酚和2,6-二叔丁基-4-乙基苯酚的总选择性高达63.7％ 。实验结果表明，儿茶酚和2-乙氧基苯酚是中间体。同时，WO3位点在愈缩菌和H 2 O 4上转化的重要作用，增强了转化率，并赞成叔丁基苯酚的高选择性。再循环试验表明，催化剂表面上的碳沉积，催化剂本身的脱水和部分还原是H2WO4催化剂的衰减。最后，提出的可能反应途径涉及在愈缩液转化过程中的酮化方法和烷基化方法。

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  • 来源
    《RSC Advances》 |2019年第5期|共8页
  • 作者

    Mai Fuhang; Cui Kai; Wen Zhe; Wu Kai; Yan Fei; Chen Mengmeng; Chen Hong; Li Yongdan;

  • 作者单位

    Tianjin Univ State Key Lab Chem Engn Tianjin Key Lab Appl Catalysis Sci &

    Technol Sch Chem Engn Tianjin 300072 Peoples R China;

    Tianjin Univ State Key Lab Chem Engn Tianjin Key Lab Appl Catalysis Sci &

    Technol Sch Chem Engn Tianjin 300072 Peoples R China;

    Tianjin Univ State Key Lab Chem Engn Tianjin Key Lab Appl Catalysis Sci &

    Technol Sch Chem Engn Tianjin 300072 Peoples R China;

    Tianjin Univ State Key Lab Chem Engn Tianjin Key Lab Appl Catalysis Sci &

    Technol Sch Chem Engn Tianjin 300072 Peoples R China;

    Tianjin Univ State Key Lab Chem Engn Tianjin Key Lab Appl Catalysis Sci &

    Technol Sch Chem Engn Tianjin 300072 Peoples R China;

    Tianjin Univ State Key Lab Chem Engn Tianjin Key Lab Appl Catalysis Sci &

    Technol Sch Chem Engn Tianjin 300072 Peoples R China;

    Tianjin Univ Sch Environm Sci &

    Engn Tianjin 300072 Peoples R China;

    Tianjin Univ State Key Lab Chem Engn Tianjin Key Lab Appl Catalysis Sci &

    Technol Sch Chem Engn Tianjin 300072 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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