三种煤在温和条件下进行了分段加氢。这三种煤加氢产物的吡啶抽提总收率分别为58.0、69.9和79.5%。其吡啶抽出物的结构指数表明,随着反应的进行,芳香结构增加:低级别煤具有分布较宽的结构类型。这些平均结构指数与醇-碱反应产物和喹啉抽出物所得的平均结构进行了比较。这三个反应的产物虽然略有差别, Three kinds of coal were staged in mild conditions hydrogenation. The total yield of pyridine extraction of the three coal hydrogenation products was 58.0, 69.9 and 79.5% respectively. The structural index of its pyridine extract indicates that aromatic structure increases as the reaction progresses: low-grade coal has a wide distribution of structural types. These average structure indices were compared with the average structure obtained for the alcohol-base reaction product and the quinoline extract. Although the products of these three reactions are slightly different,