According to different fefining levels, paraffin wax can be divided into full- refined paraffin wax, semi-refined paraffin wax and crude paraffin. The first two are mainly used as component of food and other commodities (such as wax paper, crayons, candlesm carbo paper) and packing materials, baking container's coating materials, cosmetic raw materials, and for keeping fruit fresh, improving the rubber anti-aging and flexibiliy ability, electrical appliance components' insulation, precision casting, etc. It also can be used for oxidation synthesis of fatty acid.