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Tunable Fabrication of NiAl‐LDHs Containing Acid Activity Sites as Green Catalyst for Acetalization of Furfural to Furfural Diethyl Acetal
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-07-20 , DOI: 10.1002/slct.201800302 Yali Du 1, 2 , Xuezhen Liu 2 , Xu Wu 2 , Qiangqiang Cheng 2 , Chao Ci 2 , Wei Huang 3
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-07-20 , DOI: 10.1002/slct.201800302 Yali Du 1, 2 , Xuezhen Liu 2 , Xu Wu 2 , Qiangqiang Cheng 2 , Chao Ci 2 , Wei Huang 3
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NiAl‐LDHs with different acid‐base activity sites were fabricated by tuning the synthetic pH. NiAl‐LDH was introduced into acetalization of furfural to furfural diethyl acetal for the first time. As the result showed that carbonate form LDH (marked as NiAl‐CO3‐LDH) obtained at basic pH presented inert activity as for the absence of appropriate acid activity sites. However, while at acidic pH ambience, nitrate form LDH (marked as NiAl‐NO3‐LDH) was produced. NiAl‐NO3‐LDH expressed preferable acid catalytic property with fine acid activity sites, when setting reaction time of 30 minutes, the equilibrium conversion of furfural was up to 78.5% and the selectivity of furfural diethyl acetal was nearly 100%. Besides, it could be recycled several times and showed stable activity without structural change. Different from the Brønsted acidity catalysts, this is an excellent result ever achieved for the synthesis of furfural diethyl acetal on the Lewis acidic catalyst.
中文翻译：
含酸活性位点的NiAl-LDHs的可调谐制备作为糠醛到糠醛二乙缩醛催化绿色催化剂的绿色催化剂
通过调节合成pH值可以制备出具有不同酸碱活性位点的NiAl-LDH。NiAl-LDH首次被引入糠醛缩醛化为糠醛二乙缩醛中。结果表明，在碱性pH值下获得的碳酸盐形式的LDH（标记为NiAl-CO 3 -LDH）表现出惰性活性，因为没有合适的酸活性位。但是，在酸性pH值环境中，会生成硝酸盐形式的LDH（标记为NiAl-NO 3 -LDH）。镍铝3‐LDH表现出较好的酸催化性能，具有良好的酸活性位点，当将反应时间设置为30分钟时，糠醛的平衡转化率高达78.5％，糠醛二乙缩醛的选择性接近100％。此外，它可以循环使用多次，显示出稳定的活性，而无需改变结构。与布朗斯台德酸性催化剂不同，这是在路易斯酸性催化剂上合成糠醛二乙基乙缩醛所获得的出色结果。
更新日期：2018-07-20
中文翻译：
含酸活性位点的NiAl-LDHs的可调谐制备作为糠醛到糠醛二乙缩醛催化绿色催化剂的绿色催化剂
通过调节合成pH值可以制备出具有不同酸碱活性位点的NiAl-LDH。NiAl-LDH首次被引入糠醛缩醛化为糠醛二乙缩醛中。结果表明，在碱性pH值下获得的碳酸盐形式的LDH（标记为NiAl-CO 3 -LDH）表现出惰性活性，因为没有合适的酸活性位。但是，在酸性pH值环境中，会生成硝酸盐形式的LDH（标记为NiAl-NO 3 -LDH）。镍铝3‐LDH表现出较好的酸催化性能，具有良好的酸活性位点，当将反应时间设置为30分钟时，糠醛的平衡转化率高达78.5％，糠醛二乙缩醛的选择性接近100％。此外，它可以循环使用多次，显示出稳定的活性，而无需改变结构。与布朗斯台德酸性催化剂不同，这是在路易斯酸性催化剂上合成糠醛二乙基乙缩醛所获得的出色结果。
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