以偏钒酸铵为钒源,采用溶胶-凝胶法合成了不同钒含量的六方介孔硅(V-HMS)分子筛,利用X射线衍射、N2吸附-脱附和程序升温还原( H2-TPR)对合成的催化剂进行了表征,考察了V-HMS对苯羟基化反应的影响.结果表明,钒进入了分子筛骨架,并且在HMS分子筛上具有较好的分散性.V-HMS对苯羟基化反应具有良好的催化活性；高分散的钒氧物种有利于提高苯的羟基化反应性能,溶剂乙腈对反应促进作用明显.乙腈为溶剂,w(V(5.8)-HMS) =2％,60℃反应5h,苯酚收率达到18.55％,选择性达到100％.
参考文献
| [1] | Schmidt R J.Industrial Catalytic Processes-Phenol Production[J].Appl Catal A,2005,280:89-103. |
| [2] | Zhang J,Tang Y,Li G,et al.Room Temperature Direct Oxidation of Benzene to Phenol Using Hydrogen Peroxide in the Presence of Vanadium-Substituted Heteropolymolybades[J].Appl Catal A,2005,278:251-261. |
| [3] | ZHANG Xiongfu.Direct Hydroxylation of Benzene to Phenol[J].Prog Chem,2008,20(2/3):386-395 (in Chinese).张雄福.苯直接一步氧化合成苯酚[J].化学进展,2008,20(2/3):386-395. |
| [4] | Pauly T R,Pinnavaia T J.Pore Size Modification of Mesoporous HMS Molecular Sieve Silicas with Wormhole Framework Structures[J].Chem Mater,2001,13:987-993. |
| [5] | Nguyen L D,Loridant S,Launay H,et al.Study of New Catalysts Based on Vanadium Oxide Supported on Mesoporous Silica for the Partial Oxidation of Methane to Formaldehyde:Catalytic Properties and Reaction Mechanism[J].J Catal,2006,237(1):38-48. |
| [6] | Gao X,Xu J.A New Application of Clay-Supported Vanadium Oxide Catalyst to Selective Hydroxylation of Benzene to Phenol[J].Appl Clay Sci,2006,33:1-6. |
| [7] | ChenJ,Gao S,Xu J.Direct Hydroxylation of Benzene to Phenol over a New Vanadium-Substituted Phosphomolybdate as a Solid Catalyst[J].Catal Commun,2008,9:728-733. |
| [8] | Zhu Y,Dong Y,Zhao L N,et al.Highly Efficient VOx/SBA-16 Mesoporous Catalyst for Hydroxylation of Benzene[J].J Chin Catal,2008,29(11):1067-1069. |
| [9] | Zhu Y,Dong Y,Zhao L,et al.Preparation and Characterization of Mesoporous VOx/SBA-16 and Their Application for the Direct Catalytic Hydroxylation of Benzene to Phenol[J].J Mol Catal A:Chem,2010,315:205-212. |
| [10] | Feng S,Pei S,Yue B,et al.Synthesis and Characterization of V-HMS Employed for Catalytic Hydroxylation of Benzene[J].Catal Left,2009,131:458-462. |
| [11] | JIA Lihua,ZHANG Sen,SONG He,et al.Catalytic Oxidation of Benzyl Alcohol to Benzyl Aldehyde with Fe-HMS[J].J Chem Ind Eng,2009,60(9):2210-2214(in Chinese).贾丽华,张森,宋贺,等.铁改性HMS催化氧化苯甲醇合成苯甲醛[J].化工学报,2009,60(9):2210-2214. |
| [12] | Tanev P T,Pinnavaia T J.A Neutral Templating Route to Mesoporous Molecular Sieve[J].Science,1995,267:865-867. |
| [13] | JIAO Qingzhu,PANG Wenqin.Studies on Hetero-Atom ZSM-48 Type Molecular Sieves:Ⅲ.Existing State of Hetero-Atom[J].Acta Phys-Chem Sin,1991,7(6):662-665(in Chinese).焦庆祝,庞文琴.杂原子ZSM-48型分子筛研究:Ⅲ.杂原子存在状态[J].物理化学学报,1991,7(6):662-665. |
| [14] | Zhang W Z,Pauly T R,Pinnavaia T J.Tailoring the Framework and Textural Mesopores of HMS Molecular Sieves Through an Electrically Neutral(S0I0) Assembly Pathway[J].Chem Mater,1997,9:2491-2498. |
| [15] | Pauly T R,Liu Y,Pinnavaia T J,et al.Textural Mesoporosity and the Catalytic Activity of Mesoporous Molecular Sieves with Wormhole Framework Structures[J].J Am Chem Soc,1999,21:8835-8842. |
| [16] | XU Lianbo,FAN Yining,LIU Liu,et al.Dispersion State and Catalytic Properties of Vanadium Species on the Surface V2O5/TiO2 Catalyst[J].Sci China(Series B),2002,32 (3):235-242 (in Chinese).许波连,范以宁,刘浏,等.V2O5/TiO2催化剂表面钒氧物种的分散状态和催化性能[J].中国科学:B,2002,32(3):235-242. |
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