Comparative research on three types of MIL-101(Cr)-SO(3)H for esterification of cyclohexene with formic acid.
Comparative research on three types of MIL-101(Cr)-SO(3)H for esterification of cyclohexene with formic acid.
复制标题
三种MIL-101(Cr)-SO3H用于环己烯与甲酸酯化反应的对比研究
作者：
以CrO3或Cr(NO3)3·9H2O为Cr源，2-磺对苯二甲酸钠盐为配体，分别以HCl、HF和NaAC为矿化剂，采用一锅法合成MIL-101(Cr)-SO3H。在所制备的催化剂中，以HCl为矿化剂的MIL-101(Cr)-SO3H具有较高的比表面积和较强的酸性。当这些催化剂用于催化环己烯与甲酸的酯化反应时，以HCl为矿化剂制备的MIL-101(Cr)-SO3H在酯化反应中具有最高的催化活性，环己烯的转化率为63.97%，而以NaAC和HF为矿化剂制备的MIL-101(Cr)-SO3H的环己烯转化率为38.40%和32.46%，对甲酸环己酯的选择性为97.50%。以HCl为矿化剂的MIL-101(Cr)-SO3H可以连续重复使用三次而不损失催化活性。MIL-101(Cr)-SO3H分别用HCl、HF和NaAC三种不同的矿化剂制备。并比较了三种样品催化环己烯与甲酸酯化反应的性能和稳定性。
MIL-101(Cr)-SO3H was prepared by a one-pot synthesis method using CrO3 or Cr(NO3)3·9H2O as a Cr source and 2-sulfoterephthalic acid monosodium salt as a ligand with three different mineralizers, HCl, HF and NaAC, respectively. Among the prepared catalysts, MIL-101(Cr)-SO3H, which uses HCl as a mineralizer, has a high specific surface area and the strongest acidity compared with the other two mineralizers. When these catalysts were used to catalyze the esterification of cyclohexene with formic acid, MIL-101(Cr)-SO3H prepared using HCl as a mineralizer possessed the highest catalytic activity in the esterification, because the conversion rate of cyclohexene is 63.97%, whereas MIL-101(Cr)-SO3H prepared using NaAC and HF as a mineralizer shows cyclohexene conversion rates of 38.40% and 32.46%, while their selectivity to cyclohexyl formate is about 97.50%. MIL-101(Cr)-SO3H with HCl as a mineralizer can be reused three times in succession without any loss of catalytic activity. MIL-101(Cr)-SO3H was prepared with three different mineralizers, namely HCl, HF and NaAC, respectively. And catalytic performance and stability of three samples catalyzing the esterification of cyclohexene with formic acid were compared.
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