Styrene is an organic compound formed by replacing a hydrogen atom of ethylene with benzene, the molecular formula is C8H8, the electron of vinyl and benzene ring conjugated, insoluble in water, soluble in ethanol, exposed to air gradually polymerization and oxidation. Industry is synthetic resin, ion exchange resin and synthetic rubber and other important monomer.

Under the action of catalyst, ethylbenzene dehydrogenated to styrene at 550 ~ 600℃, ethylbenzene dehydrogenation is a reversible endothermic molecular reaction, heating and decompression is conducive to the reaction in the direction of styrene generation. The method used in industry is to add a large amount of high-temperature water vapor to the feed to reduce the hydrocarbon partial pressure and provide some of the heat required for the reaction. The mole ratio of water vapor to hydrocarbon (water ratio for short) varies depending on the type of reactor and ranges from about 6 to 14.

A type of aromatics. Molecular formula C8H8, structure simple C6H5CH=CH2. Found in Suhe balm (a natural fragrance). A colorless, oily liquid with a distinctive aroma. The melting point was -30.6℃, the boiling point was 145.2℃, the relative density was 0.9060(20/4℃), the refractive index was 1.5469, and the viscosity was 0.762 cP at 68 °F. Insoluble in water (<1%), can be miscible with ethanol and other organic solvents. Styrene can be slowly polymerized at room temperature, to add polymerization inhibitor [hydroquinone or tert-butylcatechol (0.0002% ~ 0.002%) as a stabilizer, to delay its polymerization] to store. Styrene self-polymerization to polystyrene resin, it can also copolymerize with other unsaturated compounds, synthetic rubber and resin and other products. For example, styrene butadiene rubber is a copolymer of butadiene and styrene; ABS resin is acrylonitrile (A), butadiene (B) and styrene (S) copolymer; The raw material for the ion-exchange resin is a copolymer of styrene [1] and a small amount of 1, 4-di (vinyl-benzene). Styrene can also undergo addition reactions characteristic of alkenes. Health hazard: irritation and anesthesia to the eyes and upper respiratory mucosa. Acute poisoning: High concentration, immediately cause irritation of the eyes and mucous membranes of the upper respiratory tract, appear eye pain, tears, runny nose, sneezing, sore throat, cough, followed by headache, dizziness, nausea, vomiting, general fatigue, etc. Severe cases may have vertigo, staggering gait. Eyes may burn when contaminated with styrene liquid. Chronic effects: common neurasthenia syndrome, including headache, fatigue, nausea, loss of appetite, bloating, depression, forgetfulness, finger tremors, etc. Has irritating effect on respiratory tract, long-term exposure sometimes causes obstructive pulmonary disease. Rough, chapped and thickened skin. [3] Environmental hazards: serious hazards to the environment, causing pollution to water, soil and atmosphere. Ignition hazard: This product is flammable, suspected carcinogens, irritant.