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嫁接Al改性MCM-41介孔分子筛催化合成双酚F

谢铭宇,李若飞,贾雪,田黎黎,夏新年*   

  1. (湖南大学化学与化工学院 长沙 410082)
  • 收稿日期:2013-05-13 修回日期:2013-06-19 出版日期:2014-02-10 发布日期:2014-02-10
  • 通讯作者: 夏新年,副教授; Tel/Fax:0731-88821549; E-mail:xiaxinnian8787@163.com; 研究方向:水性环氧树脂,高分子合成,固化剂的制备
  • 基金资助:
    化石能源低碳化清洁利用—教育部创新团队(湖南大学)支助计划(IRT1238);湖南大学理科化学基地-科研训练及科研能力提高项目(J1210040);湖南省科技厅项目(2011WK3010)

Synthesis of Bisphenol F Catalyzed by Aluminum-grafted MCM-41 Mesoporous Molecular Sieve

XIE Mingyu, LI Ruofei, JIA Xue, TIAN Lili, XIA Xiannian*   

  1. (College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China)
  • Received:2013-05-13 Revised:2013-06-19 Published:2014-02-10 Online:2014-02-10
  • Contact: Xinnian

摘要: 以十六烷基三甲基溴化铵和正硅酸乙酯为原料,合成纯硅MCM-41介孔分子筛。 再利用九水硝酸铝为改性剂来嫁接改性纯硅MCM-41介孔分子筛,NH3-TPD结果表明,嫁接后的AlMCM-41产生了中强酸。 用改性后不同n(Si)/n(Al)的AlMCM-41催化合成双酚F,在n(苯酚)/n(甲醛)=30、反应时间5 h、反应温度90 ℃、m(甲醛)/m(AlMCM-41)=7的反应条件下,在一定范围内,双酚F的产率随Al含量增加而增加,但在n(Si)/n(Al)<50时,双酚F的产率反而下降,当n(Si)/n(Al)=50时,双酚F的产率最高,为42.28%。

关键词: 硝酸铝, 嫁接, 双酚F, MCM-41分子筛

Abstract: Cetyltrimethylammonium bromide(CTAB) and tetraethylorthosilicate(TEOS) were selected as raw materials for the synthesis of pure silicon MCM-41. Using Al(NO3)3·9H2O as aluminum source to modify pure silicon MCM-41 by grafting method. The AlMCM-41 was characterized by NH3-TPD. The results show that AlMCM-41 produced mild acid after grafting. The synthesis of bisphenol F was catalyzed by AlMCM-41 with different silicon/aluminium. The optimized reaction conditions are:n(phenol)/n(formaldehyde)=30, reaction time of 5 h, reaction temperature of 90 ℃, m(formaldehyde)/m(AlMCM-41)=7. In a certain range, the yield of bisphenol F increases with the increase of Al. When the n(Si)/n(Al) is less than 50, the yield of bisphenol F tends to decrease. While n(Si)/n(Al)=50, the yield of bisphenol F can reach its highest value of 42.28%.

Key words: aluminum nitrate, grafting, bisphenol F, MCM-41 molecular sieve

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