Paraffin wax is a kind of mineral wax and also a kind of petroleum wax; it is a wax paste obtained by solvent refining, solvent dewaxing or freezing crystallization of wax, pressing and dewaxing from the lubricating oil fraction obtained by distillation of crude oil, and then dewaxing by solvent. Oil, refined flaky or needle-like crystals. Also known as crystalline wax, it is a mixture of hydrocarbons with about 18 to 30 carbon atoms. Monocyclic cycloalkane (the total content of both is less than 20%). The main quality indicators are melting point and oil content, the former means temperature resistance, the latter means purity. Each type of wax is divided into different varieties according to the melting point, generally every 2 ℃, such as 52, 54, 56, 58 and other brands. According to the degree of processing and refining, it can be divided into three types: fully refined paraffin, semi-refined paraffin and crude paraffin. Among them, the former two are widely used, mainly used as components and packaging materials for food and other commodities (such as wax paper, crayons, candles, carbon paper), coating materials for baking containers, cosmetic raw materials, for fruit preservation, and improving rubber resistance. It can also be used for oxidation to generate synthetic fatty acids in terms of aging and flexibility, electrical component insulation, and precision casting. Because of its high oil content, crude paraffin is mainly used in the manufacture of matches, fiberboards, tarpaulins, etc. After adding polyolefin additives to paraffin, its melting point is increased, its adhesion and flexibility are increased, and it is widely used in moisture-proof and waterproof packaging paper, cardboard, surface coating of certain textiles and candle production.
The use of paraffin wax is very extensive. After immersing paper in paraffin, various wax papers with good waterproof performance can be prepared, which can be used in food, medicine and other packaging, metal rust prevention and printing industry; when paraffin is added to cotton yarn, it can make textiles soft, smooth and elastic.; Paraffin wax can also be made into detergents, emulsifiers, dispersants, plasticizers, greases, etc. Due to the increasing shortage of animal and vegetable waxes, most candles today are made of paraffin. Paraffin melts when heated, glows, emits black smoke, and emits heat when candles burn.
There are several theories about the chemical element symbols of paraffin, one of which is that the main component of paraffin is a mixture of two elements, C and H. (May contain oxygen, but this is not essential) Its chemical element symbol is CxHy. Another saying is that paraffin is a mixture of several higher alkanes, mainly n-docosane (C22H46) and n-octacosane (C28H58), containing about 85% carbon elements and about 14% hydrogen elements. There is no single chemical Element symbol.
Main information:
Also known as crystalline wax, it is a mixture of hydrocarbons with about 18 to 30 carbon atoms. Monocyclic cycloalkane (the total content of both is less than 20%). Paraffin wax is obtained by solvent refining, solvent dewaxing or freezing crystallization of wax, pressing and dewaxing from the lubricating oil fraction in crude oil distillation, and then deoiling and supplementing the flake or needle crystal obtained by refining. According to the degree of processing and refining, it can be divided into three types: fully refined paraffin, semi-refined paraffin and crude paraffin. Each type of wax is divided into different varieties according to the melting point, generally every 2 ℃, such as 52, 54, 56, 58 and other brands. Crude paraffin has a high oil content and is mainly used in the manufacture of matches, fiberboard, and canvas. Fully refined paraffin wax and semi-refined paraffin wax are widely used. They are mainly used as components and packaging materials for food, oral medicines and certain commodities (such as wax paper, crayons, candles, carbon paper), coating materials for baking containers, and for fruit preservation., Electrical components insulation, improve rubber aging resistance and increase flexibility. It can also be used for oxidation to generate synthetic fatty acids.
Storage Precautions: Store in a cool, ventilated warehouse. Keep away from fire and heat sources. should be kept away from oxidizer, do not store together. Equipped with the appropriate variety and quantity of fire equipment. Storage areas should be provided with suitable materials to contain spills.
Now the main raw material of candles is paraffin, which is obtained from the waxy fraction of petroleum by cold pressing or solvent dewaxing. It is a mixture of several higher alkanes, mainly n-docosane (C22H46) and n-28 Alkane (C28H58), containing about 85% of carbon elements and about 14% of hydrogen elements. The added accessories are white oil, stearic acid, polyethylene, essence, etc. Among them, stearic acid (C17H35COOH) is mainly used to improve the softness, and the specific addition depends on what kind of candles are produced.
When the candle burns, the products of the combustion of n-docosane and stearic acid are carbon dioxide and water. The chemical equations for the reaction are 2C22H46 + 67O2 → 44CO2 + 46H2O and C17H35COOH + 26O2 → 18CO2 + 18H2O.
So, in general, it should be fine, but long-term inhalation is not good, because in addition to the main component CO2, there are other gases that are harmful to the body, but the content is relatively small.
