... acids, usually oil and caustic soda, caustic soda, sodium hydroxide as raw materials made through the saponification reaction. (2 ... acidic substances, must use caustic soda, caustic soda, sodium hydroxide solution, washed, and then by washing in order to obtain ... gums, etc.). Add dilute caustic soda, caustic soda, sodium hydroxide solution can be dissolved in the separation of non-cellulose components ...