Use and usage of sodium hydroxide

Sodium hydroxide makes soap. The main component of soap is the sodium salt of high fatty acid, which is usually made by saponification of oil and sodium hydroxide. 2. Refined oil. After being washed by sulfuric acid, petroleum products also contain some acid substances. Only after being washed by sodium hydroxide solution and then by water, can refined products be obtained. 3. Paper making. The raw material of papermaking is wood or grass plants, which contain not only cellulose, but also a lot of non cellulose (lignin, gum, etc.). By adding dilute sodium hydroxide solution, the non cellulose components can be dissolved and separated, so as to make pulp with cellulose as the main component. 4. Textile. Man made fibers, such as rayon, artificial wool and rayon, are mostly viscose fibers. They are made of cellulose (such as pulp), sodium hydroxide and carbon disulfide (CS2) as raw materials to make viscose liquid, which is made by spraying and coagulating. 5. Printing and dyeing. After the cotton fabric is treated with caustic soda solution, the wax, grease, starch and other substances covered on the cotton fabric can be removed, and the mercerizing color of the fabric can be increased to make the dyeing more uniform.