{"title":"Hierarchical Sn-BEA Zeolites in Catalytic Oxidation of Dihydrocarvone with Hydrogen Peroxide","authors":"R. Yu. Barakov, A. V. Smirnov","doi":"10.1134/S0965544125600213","DOIUrl":null,"url":null,"abstract":"<p>The study proposes a novel method for synthesizing hierarchical Sn-BEA zeolites. This method consists of two successive steps: dealumination of a hierarchical Al-BEA zeolite prepared in a pre-concentrated reaction mixture; and incorporation of Sn by impregnating the dealuminated zeolite with a tin(IV) chloride ethanol solution. In the hierarchical zeolites, the Si/Sn ratio was varied between 29 and 41 by adding different amounts of the tin salt to the impregnating solution. The samples were tested in the Baeyer–Villiger catalytic oxidation of dihydrocarvone with hydrogen peroxide. The initial dihydrocarvone consumption rate has been found to increase with the concentration of Lewis acid sites in the samples and exceed that of the microporous Sn-BEA zeolite synthesized by a similar procedure except for the absence of the pre-concentration of the mixture. The highest yield of lactone (47%) has been achieved in the presence of the hierarchical Sn-BEA sample with the highest concentration of strong Lewis acid sites.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 4","pages":"313 - 322"},"PeriodicalIF":1.1000,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Petroleum Chemistry","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S0965544125600213","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, ORGANIC","Score":null,"Total":0}
引用次数: 0
Abstract
The study proposes a novel method for synthesizing hierarchical Sn-BEA zeolites. This method consists of two successive steps: dealumination of a hierarchical Al-BEA zeolite prepared in a pre-concentrated reaction mixture; and incorporation of Sn by impregnating the dealuminated zeolite with a tin(IV) chloride ethanol solution. In the hierarchical zeolites, the Si/Sn ratio was varied between 29 and 41 by adding different amounts of the tin salt to the impregnating solution. The samples were tested in the Baeyer–Villiger catalytic oxidation of dihydrocarvone with hydrogen peroxide. The initial dihydrocarvone consumption rate has been found to increase with the concentration of Lewis acid sites in the samples and exceed that of the microporous Sn-BEA zeolite synthesized by a similar procedure except for the absence of the pre-concentration of the mixture. The highest yield of lactone (47%) has been achieved in the presence of the hierarchical Sn-BEA sample with the highest concentration of strong Lewis acid sites.
期刊介绍：
Petroleum Chemistry (Neftekhimiya), founded in 1961, offers original papers on and reviews of theoretical and experimental studies concerned with current problems of petroleum chemistry and processing such as chemical composition of crude oils and natural gas liquids; petroleum refining (cracking, hydrocracking, and catalytic reforming); catalysts for petrochemical processes (hydrogenation, isomerization, oxidation, hydroformylation, etc.); activation and catalytic transformation of hydrocarbons and other components of petroleum, natural gas, and other complex organic mixtures; new petrochemicals including lubricants and additives; environmental problems; and information on scientific meetings relevant to these areas.
Petroleum Chemistry publishes articles on these topics from members of the scientific community of the former Soviet Union.
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