The crude glycerol imported from South America, Southeast Asia and Europe, has long stable overseas supply and long-term cooperation with domestic mainstream crude glycerol users. Crude glycerin is a high concentration and sweet sticky liquid. It has strong solubility and soluble in water and alcohol. Crude glycerol is the main production of biodiesel. By product, it has the characteristics of moisture absorption, heat preservation, high viscosity, water solubility, innocuity, sweet taste and easy decomposition of microorganism. It is an important light chemical raw material.
    Crude glycerol can be used to prepare propylene glycol, two hydroxyacetone, epichlorohydrin and other derivatives. Propylene glycol, 1,3- propanediol and 1,2- propanediol, are important chemical raw materials. They are often used as synthetic raw materials for antifreeze, plasticizers, detergents, preservatives and emulsifiers. It can also be used in food, cosmetic and pharmaceutical industries. Its main uses are monomers of polyester, polyether and polyimide, which are widely used in carpet, engineering plastics, clothing fabrics and other fields.