Five Schiff bases were prepared from piperonal and diamines by condensation reaction.

合成新的双-胡椒醛缩二胺类席夫碱化合物。

The main synthetic methods of o-phenylphenol were reviewed.The method and research status of dehydrogenation to o-phenylphenol after cyclohexane condensation reaction were discussed detailedly.

摘要介绍合成邻苯基苯酚的几种主要工艺方法，对环己酮缩合脱氢法制邻苯基苯酚的合成方法及研究状况进行详细阐述。

It was shown that the curing process of resoles, at first, proceeded by condensation reaction of methylol groups, and the formation of dimethylene ether linkage was predominant.

结果表明热固性酚醛树脂的固化过程,首先是羟甲基发生缩合反应,缩合反应形成醚键是主要的。