【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%。更多还原

【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%.更多还原