英语语法分析

Meanwhile the applications of secondary amine, diamine, polyamine and their derivatives were summarized also.

同时概述了仲胺、二胺、多胺及其衍生物的应用。

The tendency of preparing adipic acid and hexamethylene diamine from non-benzene materials is also introduced.

此外，还介绍了以非苯原料制备己二酸、己二胺的开发情况和市场动向。

There are some problems in traditional separation process for toluene diamine, such as low purity of product and huge energy expenditure.

传统的甲苯二胺分离工艺存在一些缺点，如甲苯二胺产品的纯度不高、过程的能耗大等。