氯碱法，由电解食盐水溶液制取氢氧化钠、氯气和氢气的工业生产方法，是重要的基础化学工业之一。

NaCl在水中会解离出以及，在通电的情况下：

以及

同时，Na会与水反应，生成NaOH和。

综合起来就是：

The chloralkali process (also chlor-alkali and chlor alkali) is an industrial process for the electrolysis of NaCl. It is the technology used to produce chlorine and sodium hydroxide (caustic soda), which are commodity chemicals required by industry. 35 million tons of chlorine were prepared by this process in 1987. Industrial scale production began in 1892.