Cetearyl alcohol, also known as cetearyl alcohol, contains A mixture of solid fatty alcohols of octadecanol and cetyl alcohol, in the form of white solid, flakes or granules. Among them, stearyl alcohol and cetyl alcohol account for more than 90% of this mixture, and there are also small amounts of other alcohols. The specific proportion is about 50%-70% stearyl alcohol and 20%-35% cetyl alcohol.
Physical and chemical properties:
Relative density d4500.8176, refractive index nD391.4283, melting point 48～50 ℃, boiling point 344℃. Insoluble in water, soluble in ethanol, ether, chloroform and mineral oil. It undergoes sulfonation reaction with concentrated sulfuric acid and has no chemical effect when exposed to strong alkali.
Production method:
High-pressure hydrogenation method: coconut oil is continuously hydrogenated in a copper-chromium catalyst , obtaining a C8-C18 mixed alcohol. The glycerin in the oil is hydrogenolyzed into isopropyl alcohol and water. After the mixed fatty alcohols are frequently pressure evaporated to remove the water and isopropyl alcohol, C8-C10 alcohols, C12-C14 alcohols and C16-C18 alcohols are distilled under reduced pressure.
Uses:
For use in cosmetics, plastics, leather, textiles, synthetic detergents and other industries. It can be used as a lubricant; emulsifier; tackifier; as a base in cosmetics, especially suitable for creams and lotions; in medicine, it can be directly used in W/O emulsifier pastes, ointment bases, etc. It stabilizes emulsions and has a co-emulsifying effect, thereby reducing the amount of surfactant required to form a stable emulsion.
微信扫一扫打赏
