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嫁接Al改性MCM-41介孔分子筛催化合成双酚F

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

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【作者】 谢铭宇李若飞贾雪田黎黎夏新年

【Author】 XIE Mingyu;LI Ruofei;JIA Xue;TIAN Lili;XIA Xiannian;College of Chemistry and Chemical Engineering,Hunan University;

【机构】 湖南大学化学与化工学院

【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%。

【Abstract】 Cetyltrimethylammonium bromide(CTAB) and tetraethylorthosilicate(TEOS) were selected as raw materials for the synthesis of pure silicon MCM-41.Using Al(NO 3) 3 ·9H 2 O as aluminum source to modify pure silicon MCM-41 by grafting method.The AlMCM-41 was characterized by NH 3-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%.

【关键词】 硝酸铝嫁接双酚FMCM-41分子筛
【Key words】 aluminum nitrategraftingbisphenol FMCM-41 molecular sieve
【基金】 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)~~
  • 【文献出处】 应用化学 ,Chinese Journal of Applied Chemistry , 编辑部邮箱 ,2014年02期
  • 【分类号】TQ243.11
  • 【被引频次】6
  • 【下载频次】214
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