SCI和EI收录∣中国化工学会会刊

›› 2015, Vol. 23 ›› Issue (2): 384-388.DOI: 10.1016/j.cjche.2013.12.001

• 催化、动力学与反应工程 • 上一篇    下一篇

Synthesis, characterization of triphenyltin grafted on SBA-15 mesoporous silica and its catalytic performance for the synthesis of 4-methylacetophenone

Qigang Deng, Zhile Qin, Ying Yang, Weiming Song   

  1. College of Chemistry and Chemical Engineering of Qiqihar University, Qiqihar 161000, China
  • 收稿日期:2013-03-21 修回日期:2013-12-16 出版日期:2015-02-28 发布日期:2015-03-01
  • 通讯作者: Qigang Deng
  • 基金资助:
    Supported by the National Science Foundation of Heilongjiang Province (B201010) and the Education Department of Heilongjiang Province (12511595).

Synthesis, characterization of triphenyltin grafted on SBA-15 mesoporous silica and its catalytic performance for the synthesis of 4-methylacetophenone

Qigang Deng, Zhile Qin, Ying Yang, Weiming Song   

  1. College of Chemistry and Chemical Engineering of Qiqihar University, Qiqihar 161000, China
  • Received:2013-03-21 Revised:2013-12-16 Online:2015-02-28 Published:2015-03-01
  • Supported by:
    Supported by the National Science Foundation of Heilongjiang Province (B201010) and the Education Department of Heilongjiang Province (12511595).

摘要: The production of Ph3Sn-O-SBA-15 (Ph3SnSBA) was achieved by heating triphenyltin chloride and SBA-15 in N-methylpyrrolidone at 190℃ for 5 h using triethylamine as a catalyst. The composition, structure, and surface physical and chemical properties of Ph3SnSBA were characterized using inductively coupled plasma-atomic emission spectroscopy (ICP-AES), 13C, 119Sn and 29Si solid-state nuclear magnetic resonance (NMR) spectroscopy in situ pyridine infrared spectroscopy (Py-IR), N2 adsorption-desorption isotherms, X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results of ICP-AES and organic elemental analysis showed that the grafting yield of Sn was 17% (by mass) for Ph3SnSBA. The elemental analysis and solid-state NMR results for Ph3SnSBA were consistent with grafting of triphenyltin on SBA-15. The N2 adsorption-desorption, XRD and TEM analyses showed that Ph3SnSBA retained an ordered hexagonal mesoporous structure, resulting in decreases in the surface area, pore size and mesopore volume, and an increase in acidity as compared with SBA-15. The Hammett acidity function (H0) value and the number of acid sites for Ph3SnSBA, obtained by the Hammett methods, were 2.77-3.30 and 2.07 mmol·g-1, respectively. The Friedel-Crafts acylation of toluene and acetic anhydride over Ph3SnSBA was investigated. The yield of methylacetophenone (MAP) and the selectivity for 4-methylacetophenone (PMAP) were 79.56% and 97.12%, respectively, when the conditions were n(toluene):n(anhydride)=2.0:1.0 with 6% (by mass) catalyst, and heating under reflux for 5 h. The PMAP selectivity still reached 93.11% when Ph3SnSBA was used for the fifth time under the same reaction conditions.

关键词: SBA-15, Triphenyltin chloride, Grafting reaction, Catalysis, Friedel-Crafts

Abstract: The production of Ph3Sn-O-SBA-15 (Ph3SnSBA) was achieved by heating triphenyltin chloride and SBA-15 in N-methylpyrrolidone at 190℃ for 5 h using triethylamine as a catalyst. The composition, structure, and surface physical and chemical properties of Ph3SnSBA were characterized using inductively coupled plasma-atomic emission spectroscopy (ICP-AES), 13C, 119Sn and 29Si solid-state nuclear magnetic resonance (NMR) spectroscopy in situ pyridine infrared spectroscopy (Py-IR), N2 adsorption-desorption isotherms, X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results of ICP-AES and organic elemental analysis showed that the grafting yield of Sn was 17% (by mass) for Ph3SnSBA. The elemental analysis and solid-state NMR results for Ph3SnSBA were consistent with grafting of triphenyltin on SBA-15. The N2 adsorption-desorption, XRD and TEM analyses showed that Ph3SnSBA retained an ordered hexagonal mesoporous structure, resulting in decreases in the surface area, pore size and mesopore volume, and an increase in acidity as compared with SBA-15. The Hammett acidity function (H0) value and the number of acid sites for Ph3SnSBA, obtained by the Hammett methods, were 2.77-3.30 and 2.07 mmol·g-1, respectively. The Friedel-Crafts acylation of toluene and acetic anhydride over Ph3SnSBA was investigated. The yield of methylacetophenone (MAP) and the selectivity for 4-methylacetophenone (PMAP) were 79.56% and 97.12%, respectively, when the conditions were n(toluene):n(anhydride)=2.0:1.0 with 6% (by mass) catalyst, and heating under reflux for 5 h. The PMAP selectivity still reached 93.11% when Ph3SnSBA was used for the fifth time under the same reaction conditions.

Key words: SBA-15, Triphenyltin chloride, Grafting reaction, Catalysis, Friedel-Crafts