英语语法分析

Difficulty: Hydrolytic methods of sulfonic acid, sulphonate and amido.

难点：磺酸及其盐类的水解、氨基的水解。

The composition and beneficiation test of MKS mixed sulphonate collector are described.

介绍了MKS混合磺酸盐捕收剂的组成、制备及选矿试验情况。

A new method to sulphonate dialkylbenzene directly by a stable liquid sulphur trioxide.

一种稳定的液态三氧化硫直接磺化重烷基苯新方法。