Vegetable oil is composed of unsaturated fatty acids and glycerol combined compounds, mainly formed and stored in the plants, fruit, seed, embryo, according to its composition can be divided into edible vegetable oil and vegetable oil industry. Such as peanut oil, soybean oil, rapeseed oil, sunflower oil, olive oil, corn germ oil because of rich vitamin E, K, calcium, iron, phosphorus, potassium and other minerals and unsaturated fatty acid and other nutrients, has become indispensable to people's daily diet kitchen supplies.

The squeezing process and refining process of traditional vegetable oil is very simple, and sometimes even without any treatment. Nowadays, with the improvement of people's living standard, the quality of edible oil is higher and higher, forcing manufacturers to improve the production process of edible oil. If the traditional ordinary press process to improve the classification of the present or multi-stage press, in the oil extraction, filtration, decolorization and other production processes are also gradually changed to now advanced production technology.

At present, the main use of oil decolorization purificationatlapulgite，Activated clay appearance is white or white powder, odorless, tasteless, non-toxic, and has strong adsorption, can adsorb colored material, organic matter and other tiny impurities, of vegetable oil decolorization purification treatment can absorb grease mycotoxins, phospholipids, saponin and cotton acid and residual pesticide impurities.