| 苯与1,2,4-三甲苯在纳米HZSM-5上的烷基转移反应 |
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| 引用本文： | 程晓晶,王祥生. 苯与1,2,4-三甲苯在纳米HZSM-5上的烷基转移反应[J]. 石油炼制与化工, 2011, 42(9): 23-26 |
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| 作者姓名： | 程晓晶 王祥生 |
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| 作者单位： | 1. 新疆大学石油天然气精细化工教育部重点实验室;2. 大连理工大学精细化工国家重点实验室; |
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| 摘 要： | 研究了硅酸乙酯或吡啶改性对纳米HZSM-5分子筛催化剂上苯与1,2,4-三甲苯反应体系中各反应的影响。结果表明：在苯与1,2,4-三甲苯反应体系中，1,2,4-三甲苯的脱烷基反应、烷基转移反应及异构化反应等一次反应主要在纳米HZSM-5外表面及孔口酸位上进行；苯与二甲苯之间的烷基转移反应、二甲苯的脱烷基反应等二次反应主要在纳米HZSM-5内表面酸位上进行；反应由B酸催化。
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| 关 键 词： | 纳米HZSM-5 烷基转移反应 酸性 |
| 收稿时间： | 2011-02-21 |
| 修稿时间： | 2011-05-03 |
TRANSALKYLATION OF BENZENE AND 1,2,4- TRIMETHYLBENZENE OVER NANOSIZED HZSM-5 |
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| Cheng Xiaojing,Wang Xiangsheng. TRANSALKYLATION OF BENZENE AND 1,2,4- TRIMETHYLBENZENE OVER NANOSIZED HZSM-5[J]. Petroleum Processing and Petrochemicals, 2011, 42(9): 23-26 |
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| Authors: | Cheng Xiaojing Wang Xiangsheng |
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| Affiliation: | Cheng Xiaojing 1,2,Wang Xiangsheng 1 (1.State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian 116012,2.Key Laboratory of Oil & Gas Fine Chemistry,Xinjiang University) |
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| Abstract: | In this present study, nanosized HZSM-5 was treated by tetraethoxysilane and pyridine respectively to study the effect on the reactions in benzene and 1,2,4-trimethylbenzene (1,2,4-TMB) system. It was found that the primary reactions such as transalkylation of benzene and 1,2,4-TMB, dealkylation of 1,2,4-TMB and isomerization of 1,2,4-TMB occurred at the acid sites of the external surface and pore opening near by. Secondary reactions such as dealkylation of xylenes, transalkylation of benzene and xylenes occurred at acid sites of the internal surface. These reactions were catalyzed by Br?nsted acid sites. |
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| Keywords: | nanosized HZSM-5 transalkylation acidity |
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