Oxidation and Decarboxylation. A Reaction Sequence for the Study of Aromatic Structural Elements in Pocahontas No. 3 Coal
Oxidation and Decarboxylation. A Reaction Sequence for the Study of Aromatic Structural Elements in Pocahontas No. 3 Coal
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DOI：
10.1021/ef960229t
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发表时间：
1997-09
期刊：
影响因子：
5.3
通讯作者：
L. Stock;M. Obeng
中科院分区：
文献类型：
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作者：
L. Stock;M. Obeng
在碱性溶液中，氧气被用来将Pocahontas 3号煤氧化成芳香族羧酸的混合物，而N-甲基吡咯烷酮−喹啉中的氧化铜(I)被用来脱羧酸以提供碳氢化合物的混合物。在这个序列中，大多数侧链烷基都被去除了，并且产物分布比直接氧化反应或分析煤液和抽出物所得到的产物分布要简单得多。产物中保留了约25%的芳香碳原子。用气相色谱-−-MS和高分辨激光解吸-质谱法对化合物的结构进行了表征。在GCMS实验中检测到大约150种化合物，包括广泛的二、三、四、六环多环芳烃、二苯并呋喃和二氮杂呋喃以及二苯并和二氮杂并噻吩类化合物。嗨.。
Oxygen in basic solution has been used to oxidize Pocahontas No. 3 coal to a mixture of aromatic carboxylic acids, and copper(I) oxide in N-methylpyrrolidinone−quinoline has been used to decarboxylate the acids to provide a mixture of hydrocarbons. Most pendant alkyl groups have been removed in this sequence and the product distribution is much less complex than the product distributions that are obtained in direct oxidation reactions or in the analysis of coal liquids and extracts. Approximately 25% of the aromatic carbon atoms are retained in the products. The structures of these compounds have been investigated by gas chromatography−mass spectrometry and by high-resolution and laser desorption mass spectrometry. Approximately 150 compounds were detected in the GCMS experiments including a broad array of bi-, ter-, and quateraryls, fluorene and fluoranthene derivatives, polycyclic aromatic hydrocarbons with four, five, and six rings, dibenzo- and dinaphthofurans, and dibenzo- and dinaphthothiophenes. Hi...