Highly versatile. Although the solution for the system Qi, pulp making, soap, dyes, artificial silk, aluminum, petroleum refining, cotton finishing, purified coal tar products, and food processing, wood processing and machinery industry and so on.
Chemistry experiment
In addition to the reagents used outside, because it has a strong absorbent and deliquescent, but also used as an alkaline desiccant. [3] can also be absorbed acid gases (such as oxygen in the combustion of sulfur in the experiment, sodium hydroxide solution to the absorption of toxic sulfur dioxide into the bottle.)
Industrial
Sodium hydroxide is widely applied in the national economy, many industrial sectors require sodium hydroxide. Sodium hydroxide is the most used chemical manufacturing sector, followed by paper, aluminum smelting, refining tungsten, rayon, rayon and soap manufacturing. Further, in the production of dyes, plastics, pharmaceutical and organic intermediates, reproducing the old rubber, metal sodium, water and inorganic salt electrolysis production, preparation of borax, chromium, manganese, phosphate, etc., but also the use of a lot of soda.
Chemical Industry
Determines the characteristics of the product of sodium hydroxide in a number of chemical reactions are important and indispensable substances. Sodium hydroxide is the production of polycarbonate, a super absorbent polymer, zeolite, epoxy, sodium sulfite and a lot of important raw materials sodium.
Oleic acid is a monounsaturated fatty acids by hydrolysis of oil; soft, saturated fatty acids are stearic acid, the hydrolysis of fats.
If potassium hydroxide hydrolysis of the resulting soap is soft.
Sodium chloride was added to the solution may reduce the solubility of the fatty acid salt and separating the fatty acid salts, a process called salting. Salts of higher fatty acid soap is the main component, the process can be obtained by the filler bar soaps.
Saponification
The main components of fats and vegetable oils are triglycerides, alkaline solution of its equations are:
R groups may be different, but the resulting R-COONa can make soap. R-common are:

C17H33-: 8 – heptadecenyl. R-COOH is oleic acid.
C15H31-: n-pentadecyl. Palmitic acid R-COOH.
C17H35-: n-heptadecyl. R-COOH is stearic acid.