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Tunable Fabrication of NiAl‐LDHs Containing Acid Activity Sites as Green Catalyst for Acetalization of Furfural to Furfural Diethyl Acetal
Author(s) -
Du Yali,
Liu Xuezhen,
Wu Xu,
Cheng Qiangqiang,
Ci Chao,
Huang Wei
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201800302
Subject(s) - furfural , nial , acetal , catalysis , chemistry , selectivity , lewis acids and bases , organic chemistry , brønsted–lowry acid–base theory , inorganic chemistry , nuclear chemistry , intermetallic , alloy
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‐CO 3 ‐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‐NO 3 ‐LDH) was produced. NiAl‐NO 3 ‐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.