After oxidized by the nitric acid the surface of lignite particle can produce the functional group structure which can attend the synthetic reaction.In the paper, some key factors were discussed.

• 理论上，褐煤经硝酸氧化后能产生可以参与酚醛树脂合成反应的官能团结构，本论文对褐煤硝酸氧化过程中的一些关键因素进行了分析。