Paraffin is an odd kind of wax extracted from some of the constituents of petroleum, shale oil or other bituminous mineral oil. Others have paraffin wax.
Paraffin wax is a kind of mineral wax, also a kind of petroleum wax. It is the oil fraction obtained from crude oil distillation refined by solvent, dewaxed by solvent, dewaxed by wax freezing crystallization, pressed dewaxing paste, then deoiled by solvent, refined by flake or needle crystallization. Also known as crystalline wax, hydrocarbon mixtures with carbon atoms ranging from 18 to 30 are mainly composed of straight-chain alkanes (about 80 to 95 percent), a small number of alkanes with individual branched chains and single-ring cycloalkanes with long side chains (both with a combined content of less than 20 percent). The main quality indicators are melting point and oil content. The former indicates the temperature resistance and the latter indicates the purity. Widely among them before the two purposes, mainly used as food and other commodities, such as wax paper, crayons, candles, carbon paper) of components and packing materials, baking container with dressing, cosmetics raw materials, used for fruit preservation, improve rubber insulation aging resistance and increase flexibility, electrical apparatus, precision casting, etc., can also be used to generate synthetic fatty acid oxidation.
According to the degree of processing and refining, it can be divided into three types: fully refined paraffin wax, semi-refined paraffin wax and crude paraffin wax. Each type of wax and according to the melting point, generally every 2 ℃, divided into different varieties, such as 52,54,56,58 brand. Crude paraffin wax has high oil content and is mainly used for making matches, fiberboard, canvas, etc.
The main components are straight chain alkanes and contain a small amount of branched alkanes. Straight-chain alkanes range from 75 percent to nearly 100 percent. Each particular species consists of approximately 8-15 alkanes of different carbon Numbers. Paraffin wax is a white group, soluble in gasoline, carbon disulfide, xylene, ether, benzene, chloroform, carbon tetrachloride, naphtha and other non-polar solvents, not soluble in such polar solvents as water and methanol.
· microcrystalline stone wax
Microcrystalline paraffin wax is mainly composed of textured chain hydrocarbons, cycloalkanes and some straight chain hydrocarbons with molecular weight ranging from 500 to 1000. This is a relatively small crystal, soluble in non-polar solvents, insoluble in polar agents.
· liquid paraffin
There are many kinds of liquid paraffin and its lubrication effect is different. The initial lubrication effect is good and the thermal stability is good. But because of the poor solubility, the product is easy to stick when the dosage is too much.