White oil is a colorless, translucent oily liquid with no or almost no fluorescence. , odorless and tasteless when cold, with a slight petroleum-like smell when heated, insoluble in water and ethanol, soluble in volatile oils, miscible in most non-volatile oils, stable to light, heat, acid, etc., but exposed to light and heat for a long time Heat will slowly oxidize. It is understood that commonly used ones include industrial grade white oil, cosmetic grade white oil, medical grade white oil, food grade white oil, etc. Different types of white oil also have different uses.
The viscosity and flash point of white oil are related to these factors:
1. Viscosity of white oil
Viscosity refers to the oil The internal friction resistance between molecules occurs when the oil moves in the flow, which reflects the flow function of the oil. Its size is closely related to the molecular weight and chemical composition of the oil, and is also related to factors such as temperature and pressure at the location. The viscosity of oil increases with the increase of molecular weight, increases with the increase of naphthenic composition, decreases with increase of temperature, gradually increases with increase of pressure, and increases significantly at high pressure.
2. Flash point of white oil
The flash point refers to the lowest temperature at which a petroleum product will flash fire when heated to the point where its evaporated vapor comes into contact with Mars under certain conditions. We usually use the open flash point. The level of the flash point is related to the chemical composition of the oil. The lighter the oil fraction and the lower the boiling range, the lower the flash point.
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