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High-end raw materials

Chemical materials can be generally divided into two categories of organic chemical materials and inorganic chemical materials organic chemical materials can be divided into alkanes and their derivatives, olefins and their derivatives, alkynes and derivatives, quinones, aldehydes, alcohols, ketones, phenols, ethers, anhydrides, esters, organic acids, carboxylates, carbohydrates, heterocyclic, nitrile, halogenated, amine acyl, other types of inorganic chemicals can be divided into inorganic acids, inorganic bases, inorganic salts, oxides, monomers, industrial gases and other types of alkanes are mainly used as fuels. Inorganic bases, inorganic salts, oxides, monomers, industrial gases and other types of alkanes are mainly used as fuel. Natural gas (75% methane, 15% ethane, 5% propane and 5% other impurities) and biogas (the main component is methane) are clean energy sources that have been widely used recently.
      The various fractions obtained from petroleum fractional distillation are suitable for use in a variety of engines: C1~C4 (fractions at 40°C or less) are petroleum gases and can be used as fuel;
C5 ~ C11 (40 ~ 200 ℃ when the fraction) is gasoline, can be used as fuel, can also be used as a chemical raw material, petroleum processing of crude gasoline commonly used hydrogenation method to remove olefins, to get hydrogenated gasoline, to improve the quality of the oil .
C9~C18(fraction at 150~250℃) is paraffin, which can be used as fuel;
C14~C20 (fraction at 200~350℃) is diesel oil, which can be used as fuel;
The fraction above C20 is heavy oil, and then distilled under reduced pressure can get lubricating oil, asphalt and other substances. In addition, alkanes are cracked to obtain olefins, a reaction that has become an important method of producing ethylene in recent years.

Small molecule olefins are mainly derived from petroleum cracking gas. Cyclic olefins are found in greater quantities in plant essential oils, many of which are used as fragrances. Alkynes are important basic raw materials in organic synthesis and are used to make polyolefins and synthetic rubber.
Because acetylene gives off a lot of heat when it burns, acetylene is often used as a raw material in welding.