Kinetics and reaction mechanism of phenol hydroxylation catalyzed by la-co4fealco3
文献类型：期刊论文
| 作者 | Chen, CX; Xu, CH; Feng, LR; Suo, JS; Qu, FL |
| 刊名 | Science in china series b-chemistry
 |
| 出版日期 | 2005-12-01 |
| 卷号 | 48期号:6页码:530-537 |
| 关键词 | Rare earth Hydrotalcite Microwave irradiation Phenol hydroxylation Kinetics Reaction mechanism |
| ISSN号 | 1006-9291 |
| DOI | 10.1360/042004-66 |
| 通讯作者 | Chen, cx(ccx1759@163.com) |
| 英文摘要 | The present work synthesizes la-cu4fealco3 catalyst under microwave irradiation and characterizes its structure using xrd and ir techniques. the results show that the obtained la-cu4fealco3 has a hydrotalcite structure. in the phenol hydroxylation with h2o2 catalyzed by la-cu4fealco3, the effects of reaction time and phenol/h2o2 molar ratio on the phenol hydroxylation, and relationships between the initial hydroxylation rate with concentration of the catalyst, phenol, h2o2 and reaction temperature are also investigated in details. it is shown the phenol conversion can reach 50.09% (mol percent) in the phenol hydroxylation catalyzed by la-cu4fealco3, under the reaction conditions of the molar ratio of phenol/h2o2 1/2, the amount ratio of phenol/catalyst 20, reaction temperature 343 k, reaction time 120 min, 10 ml distilled water as solvent. moreover, a kinetic equation of v = k[la - cu4fealco3][c6h5oh] [h2o2]. and the activation energy of e-a=58.37 kj/mol are obtained according to the kinetic studies. due to the fact that the ho-cu+-oh species are detected in la-cu4fealco3/h2o2 system by xps, the new mechanism about the generation of hydroxyl free radicals in the phenol hydroxylation is proposed, which is supposed that ho-cu+-oh species are transition state in this reaction. |
| WOS关键词 | HYDROTALCITE-LIKE COMPOUNDS ; TERNARY HYDROTALCITES ; HYDROGEN-PEROXIDE ; AL ; OXIDATION ; METHANOL ; NI ; CO ; CR |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000234871500006 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2377231 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Chen, CX |
| 作者单位 | 1.Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, CX,Xu, CH,Feng, LR,et al. Kinetics and reaction mechanism of phenol hydroxylation catalyzed by la-co4fealco3[J]. Science in china series b-chemistry,2005,48(6):530-537. |
| APA | Chen, CX,Xu, CH,Feng, LR,Suo, JS,&Qu, FL.(2005).Kinetics and reaction mechanism of phenol hydroxylation catalyzed by la-co4fealco3.Science in china series b-chemistry,48(6),530-537. |
| MLA | Chen, CX,et al."Kinetics and reaction mechanism of phenol hydroxylation catalyzed by la-co4fealco3".Science in china series b-chemistry 48.6(2005):530-537. |
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来源：中国科学院大学
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