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paraffin wax
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Paraffin candles

Candle is made of wax or other fuels, with a candle wick in it, which can continue to burn after ignition.

Candles are generally used for lighting, but they were gradually replaced by electric lights after the power revolution. Now candles are mostly spare lighting supplies when power is out. Candles are also used on festivals or other special days and religious places. Candles are often burned in gatherings or collective memorial activities in various places. In traditional Chinese weddings, red candles are burned to show celebration; at funerals, white candles are burned to show condolences. In addition, candles are also used for warming.

Paraffin candle
Paraffin candle

In fact have many kind of candles,because of they are raw material,have soy wax candle,coconut wax candle,bee wax candle,gel wax candle paraffin wax candle.

For the paraffin wax candle is made of paraffin wax,do you know what is paraffin wax?

Paraffin wax, also known as crystalline wax, is a non-polar solvent soluble in gasoline, carbon disulfide, xylene, ether, benzene, chloroform, carbon tetrachloride, naphtha, etc., but insoluble in polar solvents such as water and methanol .

A mixture of hydrocarbons with a carbon number of about 18-30, the main component is straight-chain alkanes (about 80%-95%), and a small amount of individual branched alkanes and monocyclic cycloalkanes with long side chains ( The total content of the two is less than 20%). Paraffin wax is obtained by solvent refining, solvent dewaxing, or freezing and squeezing dewaxing of the lubricating oil fraction obtained from crude oil distillation, and then deoiling and supplementary refining to obtain flake or needle crystals. According to the degree of 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 grades. Crude paraffin has a high oil content and is mainly used in the manufacture of matches, fiberboards, tarpaulins, etc. Fully refined paraffin and semi-refined paraffin have a wide range of uses. They are mainly used as components and packaging materials for foods, oral medicines and certain commodities (such as wax paper, crayons, candles, carbon paper), coating materials for baking containers, and used for fruit preservation , Insulate electrical components, improve rubber aging resistance and increase flexibility. It can also be used for oxidation to generate synthetic fatty acids.

Paraffin wax is a hydrocarbon mixture extracted from certain distillates of petroleum, shale oil or other bituminous mineral oils. The main component is solid alkanes, which is odorless and tasteless, and is white or light yellow translucent solid. Paraffin wax is non-crystalline, but has a clear crystal structure. There is also artificial paraffin.

Paraffin wax is a kind of petroleum processing product, a kind of mineral wax, and a kind of petroleum wax. It is a flake or needle-like crystal obtained by solvent refining, solvent dewaxing, or freezing crystallization of wax, pressing dewaxing to prepare the lubricating oil fraction obtained from crude oil distillation, and then solvent deoiling and refining. Used to make higher fatty acids, higher alcohols, matches, candles, waterproofing agents, ointments, electrical insulating materials, etc.

Paraffin wax is divided into food grade (food grade and packaging grade, the former is excellent) and industrial grade. Food grade is non-toxic and industrial grade is inedible.

Paraffin wax is a mixture of hydrocarbons, so it does not have a strict melting point like pure compounds. The so-called melting point of paraffin wax refers to the temperature at which the stagnation period first appears on the cooling curve when the melted paraffin sample is cooled under specified conditions. All kinds of wax products require paraffin wax to have good temperature resistance, that is, it does not melt or soften and deform at a specific temperature. According to the use conditions, the regions and seasons of use, and the differences in the use environment, commercial paraffin waxes are required to have a series of different melting points.

The main factor that affects the melting point of paraffin wax is the weight of the selected raw material fraction, and the melting point of the paraffin wax from the heavier fraction is higher. In addition, the oil content also has a great influence on the melting point of paraffin wax. The more oil in paraffin wax, the lower its melting point.

Oil content refers to the amount of low melting point hydrocarbons contained in paraffin wax. Excessive oil content will affect the color and storage stability of paraffin wax, and it will also reduce its hardness. Therefore, the oleaginous wax paste extracted from the vacuum fraction needs to be deoiled by the sweating method or the solvent method to reduce its oil content. However, most paraffin wax products need to contain a small amount of oil, which is beneficial to improve the gloss and release performance of the products.

The device ignites the cotton wick, and the heat released melts the paraffin wax solid, and then vaporizes to generate paraffin wax vapor, which is combustible.

When the candle is ignited, the initial flame that burns is smaller and gradually becomes larger. The flame is divided into three layers (outer flame, inner flame, and flame core). The flame core is mainly candle vapor, the temperature is the lowest; the inner flame paraffin wax is not fully burned, and the temperature is higher than the flame core, and contains carbon particles; the outer flame is in full contact with the air, the flame is the brightest, the combustion is full, and the temperature is the highest. Therefore, when a matchstick is quickly put into the flame and taken out after about 1 second, the part of the matchstick that contacts the outer flame will first turn black.

At the moment when the candle is blown out, a wisp of white smoke can be seen. Use a burning match to light the wisp of white smoke, which can reignite the candle, so it can be proved that the white smoke is a solid produced by the condensation of paraffin vapor. Tiny particles.

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