Release time：2020-07-31 author：Jiangyin CaiYouDao Chemical Co., Ltd clicks：1612
Light paraffin is the abbreviation of light liquid paraffin; light mineral oil; light liquid petroleum; CAS No. 8012-95-1.
Liquid paraffin (referred to as liquid wax) refers to the paraffin containing n-alkanes obtained from kerosene or diesel oil fraction by molecular sieve adsorption separation or isopropanol urea dewaxing. It is called liquid paraffin because it is transparent, colorless or light yellow liquid at room temperature. According to the fraction, it can be divided into light liquid paraffin (referred to as light wax) and heavy liquid paraffin (referred to as heavy wax). In alkane, the carbon atom number of c9-c13 is light wax, and that of c14-c16 is heavy wax.
The content of n-alkanes in the dewaxing light wax product is more than 96%. The content of n-alkanes in the light wax product dewaxing with isopropanol urea is more than 90%. The content of aromatics in both samples was less than 1%. Light wax is mainly used as the intermediate monoolefin in the production of linear alkylbenzene (Lab), and can also be used as raw materials for plasticizer, chlorinated paraffin and petroleum protein.
The light wax is a transparent, colorless liquid and has no fluorescence under sunlight. The melting point is lower than 27 ℃, the carbon atom number is 9-13, the average molecular weight is 150-250, the fraction is narrow, the content of n-alkanes is high, and the content of aromatics and olefins is low.
Light wax is soluble in chloroform, ether and hydrocarbons; slightly soluble in ethanol (95%); almost insoluble in water.
When the light wax is heated and exposed to light, it will oxidize. The oxidation process is the formation of peroxides, which is characterized by "induction period". Under general storage conditions, the induction period may take several months or years. However, once a small amount of peroxide is formed, further oxidation is autocatalytic and continues very quickly. Uspnf20 is allowed to add appropriate stabilizer to prevent oxidation. The commonly used antioxidants are BHA, BHT and vitamin E. Light wax can be sterilized by dry heat.
