Catalytic Properties of a Heated Ammonium-Saturated Dioctahedral Smectite
Catalytic Properties of a Heated Ammonium-Saturated Dioctahedral Smectite
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DOI：
10.1135/cccc20001527
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发表时间：
2000
影响因子：
--
通讯作者：
Ľ. Jankovič;P. Komadel
中科院分区：
文献类型：
--
作者：
Ľ. Jankovič;P. Komadel
以饱和NH4的蒙脱石为原料，在200~600℃下加热24 h制备了一系列酸性催化剂，并考察了它们对3，4，5-三甲氧基苯甲醛与乙酸酐的乙酰化反应的催化活性。该反应对催化剂的改性非常敏感，适用于改性蒙脱石的催化活性测试。所制备的催化剂大多能催化试验反应，并能以高于50%的产率合成双乙酸酯。在300℃加热后得到的催化剂活性最高，其活性略低于商用酸活化K10催化剂。
A series of acid catalysts was prepared by heating of NH 4 -saturated montmorillonite at 200-600 °C for 24 h. Their catalytic activity was tested in acetylation of 3,4,5-trimethoxybenzaldehyde with acetic anhydride. This reaction is sufficiently sensitive to modification of the catalyst and thus suitable for testing catalytic activity of modified montmorillonites. Most of the prepared catalysts were able to catalyse the test reaction and produce diacetate in higher than 50% yields. The most active catalyst was obtained after heating at 300 °C. It was slightly less effective than commercially available acid-activated K10 catalyst.