研究了在钛材反应器中液相空气氧化3，3'，4，4'-四甲基二苯乙烷制备3，3'，4，4'-二苯甲酮四羧酸的反应规律。

The synthesis of 3,3 , 4,4 -benzophenone tetracarboxylic acid by liquid phase air oxidation of 1,1-bis(3,4-dimethylphenyl)ethane in titanium reactor was studied.

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一元羧酸，这是一种时常和烃发生化学反应的化合物；

monocarboxylic acids, a suite of hydrocarbons that readily participate in chemical reactions;

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本文介绍了羧酸酯化反应催化剂的研究进展。

The paper introduces the catalyst research advances in esterification reaction of carboxylic acid.

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And what it's used is to convert one type of group, what's called a carboxylic acid into another type of very reactive intermediate, which is called an acid chloride.

它被用来将一类被称作羧酸的化合物，转化成另外一类活性很高的反应中间体,也就是酰氯。

麻省理工公开课 - 化学原理课程节选