Solid Acid Catalysts in Tert-Butyl Removal Reaction of 4,6-DBMC: Performance Insights and Industrial Implications

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-04-04 DOI:10.1007/s10562-025-04985-y

Xiangke Wang, Xuan Meng, Li Shi, Naiwang Liu, Jiyu Wang

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引用次数: 0

Abstract

In the tert-butyl removal reaction, solid acid catalysts have emerged as a preferred alternative to liquid acid catalysts due to their environmentally friendly advantages. Various zeolites, such as ZSM-5, MCM-41, USY, and H beta, as well as mesoporous materials, such as γ-Al₂O₃ and active clay were employed for the first time to prepare m-cresol through the tert-butyl removal reaction of 4,6-di-tert-butyl-m-cresol (4,6-DBMC). γ-Al₂O₃ and active clay catalysts were found to have excellent catalytic performance in this reaction. The thermodynamic properties of the tert-butyl removal reaction of 4,6-DBMC were studied. Under different temperature and solvent conditions, the product distribution was investigated. A proposed reaction pathway and mechanism were proposed. And through cyclic experiments, the stability of γ-Al₂O₃ and active clay catalysts was investigated separately. After six cycles, the m-cresol yield for active clay catalyst was still maintained at about 90%. The causes of deactivation of the two catalysts were analyzed. After regeneration, both catalysts exhibited good regeneration performance. This study offers a basis for the selection of solid acid catalysts for the tert-butyl groups removal of 4,6-DBMC.

Graphical abstract

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固体酸催化剂在4,6- dbmc脱叔丁基反应中的应用：性能观察和工业意义

在叔丁基脱除反应中，固体酸催化剂因其环境友好的优点而成为液体酸催化剂的首选替代品。首次采用ZSM-5、MCM-41、USY、H β等沸石和γ-Al2O3、活性粘土等介孔材料，通过4,6-二叔丁基间甲酚（4,6- dbmc）的叔丁基脱除反应制备间甲酚。发现γ-Al2O3和活性粘土催化剂在该反应中具有优异的催化性能。研究了4,6- dbmc脱叔丁基反应的热力学性质。在不同的温度和溶剂条件下，考察了产物的分布。提出了反应途径和反应机理。并通过循环实验，分别考察了γ-Al2O3和活性粘土催化剂的稳定性。经过6次循环后，活性粘土催化剂的间甲酚收率仍保持在90%左右。分析了两种催化剂失活的原因。再生后，两种催化剂均表现出良好的再生性能。该研究为选择固体酸催化剂去除4,6- dbmc的叔丁基提供了依据。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.