{"title":"活性炭负载多金属氧酸酯催化空气氧化甲苯制苯甲醛的研究","authors":"Di Zhu, Jun-qi Hai, Le-yao Wang, Xiang-li Long","doi":"10.1016/j.mcat.2023.113626","DOIUrl":null,"url":null,"abstract":"<div><p>At present, benzaldehyde is mainly produced in the way of liquid-phase chlorination of toluene followed by hydrolysis. Such method not only pollutes the environment with the discharge of large amount of waste water, but also limits its application into the field of food and medicine due to the existence of chlorides. In this paper, toluene is oxidized to benzaldehyde by air in acetic acid using polyoxometalate supported on activated carbon as a catalyst. The composition and preparation conditions of the catalyst have been explored. The optimum polyoxometalate composition is determined as Na<sub>5.1</sub>La<sub>0.7</sub>CoMn<sub>0.3</sub>Mo<sub>11.7</sub>O<sub>40</sub>·22.05H<sub>2</sub>O@AC by ICP-OES, FT-IR, XRD and TG. The optimum catalyst preparation conditions are pH<sub>1</sub>=6.3, pH<sub>2</sub>=3.8, T<sub>1</sub>=95°C, T<sub>2</sub>=85°C, activation temperature 220°C and activation time 4 h. The best experimental results are toluene conversion 13.18 %, benzaldehyde selectivity 40.43 % and benzaldehyde yield 5.33 %.</p></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"551 ","pages":"Article 113626"},"PeriodicalIF":4.9000,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A study on the oxidation of toluene to benzaldehyde by air catalyzed by polyoxometalate loaded on activated carbon\",\"authors\":\"Di Zhu, Jun-qi Hai, Le-yao Wang, Xiang-li Long\",\"doi\":\"10.1016/j.mcat.2023.113626\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>At present, benzaldehyde is mainly produced in the way of liquid-phase chlorination of toluene followed by hydrolysis. Such method not only pollutes the environment with the discharge of large amount of waste water, but also limits its application into the field of food and medicine due to the existence of chlorides. In this paper, toluene is oxidized to benzaldehyde by air in acetic acid using polyoxometalate supported on activated carbon as a catalyst. The composition and preparation conditions of the catalyst have been explored. The optimum polyoxometalate composition is determined as Na<sub>5.1</sub>La<sub>0.7</sub>CoMn<sub>0.3</sub>Mo<sub>11.7</sub>O<sub>40</sub>·22.05H<sub>2</sub>O@AC by ICP-OES, FT-IR, XRD and TG. The optimum catalyst preparation conditions are pH<sub>1</sub>=6.3, pH<sub>2</sub>=3.8, T<sub>1</sub>=95°C, T<sub>2</sub>=85°C, activation temperature 220°C and activation time 4 h. The best experimental results are toluene conversion 13.18 %, benzaldehyde selectivity 40.43 % and benzaldehyde yield 5.33 %.</p></div>\",\"PeriodicalId\":393,\"journal\":{\"name\":\"Molecular Catalysis\",\"volume\":\"551 \",\"pages\":\"Article 113626\"},\"PeriodicalIF\":4.9000,\"publicationDate\":\"2023-10-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Molecular Catalysis\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2468823123007095\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Molecular Catalysis","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2468823123007095","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
A study on the oxidation of toluene to benzaldehyde by air catalyzed by polyoxometalate loaded on activated carbon
At present, benzaldehyde is mainly produced in the way of liquid-phase chlorination of toluene followed by hydrolysis. Such method not only pollutes the environment with the discharge of large amount of waste water, but also limits its application into the field of food and medicine due to the existence of chlorides. In this paper, toluene is oxidized to benzaldehyde by air in acetic acid using polyoxometalate supported on activated carbon as a catalyst. The composition and preparation conditions of the catalyst have been explored. The optimum polyoxometalate composition is determined as Na5.1La0.7CoMn0.3Mo11.7O40·22.05H2O@AC by ICP-OES, FT-IR, XRD and TG. The optimum catalyst preparation conditions are pH1=6.3, pH2=3.8, T1=95°C, T2=85°C, activation temperature 220°C and activation time 4 h. The best experimental results are toluene conversion 13.18 %, benzaldehyde selectivity 40.43 % and benzaldehyde yield 5.33 %.
期刊介绍：
Molecular Catalysis publishes full papers that are original, rigorous, and scholarly contributions examining the molecular and atomic aspects of catalytic activation and reaction mechanisms. The fields covered are:
Heterogeneous catalysis including immobilized molecular catalysts
Homogeneous catalysis including organocatalysis, organometallic catalysis and biocatalysis
Photo- and electrochemistry
Theoretical aspects of catalysis analyzed by computational methods
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