The wax is a kind of mineral wax, is also a kind of petroleum wax; It is from crude distillation of income by solvent refined oil fractions, solvent dewaxing or the wax frozen crystallization, squeezing wax off to cerate, again by solvent oil, refined and take off of sheets and needle crystal. Also called crystal shape wax, carbon atomic number approximately 18 ~ 30 mixture of hydrocarbons, the main group is divided into linear paraffins (about 80% ~ 95%), and a small number of branch chain with individual alkanes and take long side chain monocylic cycloparafin hydrocarbon (together content below 20%). The main quality index for melting point and oil content, said the former heat-resistant ability, the latter says purity. Before a wider use of both, mainly for food and other goods (such as wax paper, crayons, candles, carbon) components and packaging materials, roasted containers with dressing, cosmetics of raw material, used for fresh fruit, improve the rubber anti-aging sex and increase flexibility, electric components insulation, precision casting and so on, can also be used to generate the oxidation of fatty acid synthesis.