Catalytic Conversion of Diethyl Tartrate into Pyruvate over Silica-Supported Potassium Disulfate
Catalytic Conversion of Diethyl Tartrate into Pyruvate over Silica-Supported Potassium Disulfate
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DOI：
10.1246/bcsj.65.2083
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发表时间：
1992-08
影响因子：
4
通讯作者：
S. Sugiyama;Sadao Fukunaga;K. Kawashiro;H. Hayashi
中科院分区：
文献类型：
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作者：
S. Sugiyama;Sadao Fukunaga;K. Kawashiro;H. Hayashi
氢氧化亚硫酸钾(KHSO4)在较低的温度(197℃)下熔融，作为二氧化硅负载的二硫化钾(K2S2O7/SiO_2)适用于气相固定床流动操作，在300℃下从酒石酸中连续生成60%的丙酮酸乙酯。该催化剂对乙二醇组分的分子内脱水有效，对酯的水解活性较低，并能将中间产物草醛乙酸酯转化为烯醇酮形式，有利于丙酮酸的生成。TGA分析表明，KHSO4在300℃时转化为K2S2O7，这与X射线衍射分析结果一致。
Potassium hydrogensulfate (KHSO4), which melts at a lower temperature of 197 °C, was adapted for vapor-phase fixed-bed flow operations as a silica-supported potassium disulfate (K2S2O7/SiO2) to afford 60% ethyl pyruvate continuously from the tartrate at 300 °C. The catalyst was effective for the intramolecular dehydration of glycol moieties, much less active for hydrolysis of esters, and capable of converting enol- to keto-form for the intermediate oxalacetate in favor of pyruvate. A TGA analysis revealed that KHSO4 was converted to K2S2O7 at 300 °C, this was in consistent with the XRD analysis.