... agents, the chemical industry for the production of boric acid, sodium chloride, formic acid, oxalic acid, phenol and so on. ... higher fatty acids, usually oil and caustic soda, caustic soda, sodium hydroxide as raw materials made through the saponification reaction. (2 ... (lignin, gums, etc.). Add dilute caustic soda, caustic soda, sodium hydroxide solution can be dissolved in the separation of non ...