Aromatic hydrocarbons are important basic chemical raw materials with wide applications in industrial production and daily life:
Chemical and Materials Fields
Synthetic Polymer Materials: The core application is in the production of polyesters. For example, the most widely used aromatic hydrocarbon, p-xylene (PX), is oxidized to terephthalic acid (PTA), ultimately producing polyethylene terephthalate (PET). Over 60% of textile raw materials and approximately 80% of beverage packaging bottles originate from this.
Preparation of Various Chemical Products: They are basic raw materials for the synthesis of explosives, dyes, pharmaceuticals, pesticides, plastics, rubber, etc., and are also widely used in building materials, high-performance materials for national defense and aerospace, and engineering materials.
Gasoline Additives: Aromatic hydrocarbon molecules have a stable structure and can effectively suppress gasoline knocking, improving the anti-knock properties of gasoline.
They are an important component of gasoline.
Rubber Processing Aids: Aromatic hydrocarbon oils can improve the processing performance of rubber, enhance its resistance to weathering and aging, help with filler mixing and dispersion, increase the adhesion of rubber compounds, and maintain the strength of vulcanized rubber. They are widely used in the rubber products industry.
Chemical Field The unique aromatic structure of aromatic hydrocarbons makes them prone to electrophilic substitution reactions such as nitration and halogenation. They are fundamental raw materials for constructing complex molecules in organic synthesis and provide core structural units for the synthesis of various fine chemical products.
Negative Effects on Health and the Environment Some polycyclic aromatic hydrocarbons (PAHs) (such as naphthalene and benzo[a]pyrene) are found in cigarette smoke and incomplete combustion products, and are carcinogenic. Benzene-like organic compounds emitted from decorative materials and aromatic hydrocarbons produced by incomplete combustion pollute the environment, irritate the human respiratory tract and skin, and harm health.