基本解释：二甲基成烷
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The catalyst concentrated sulfonic acid xylenesulfonic acid, one of the compared nine catalysts, possesses high catalysis for the synthesis of dixylyl methane.即在原料配比ｎ（二甲苯）∶ｎ（甲醛）＝８∶１，浓硫酸质量分数１００２５％，反应温度１２０～１４０℃和时间２３３ｈ的条件下，二（二甲苯基）甲烷收率可达７７３％。
Through orthogonal design experiments, the effective regularities of synthetic condition s on the yield rate and bi-nucleus ratio of bi-phenolic methane are discussed .利用正交实验,研究了苯酚和甲醛在酸性催化剂的作用下合成二酚基甲烷的反应。
