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nature : CH2 = CH2 simplest alkene. Exist in coke oven gas and thermal cracking LPG and mature fruit. With the sweet scent colorless gas. Standard state, gaseous ethylene density of 1.260. The relative density of 0.978 (Air = 1). The relative density of liquid 0.5699 (-103.9 ° C). -169.4 ° C melting point. Boiling point -103.9 ° C Critical Temperature 9.90 ° C Critical pressure 5.07 MPa (50.7 atmospheres). Almost do not dissolve in water. Slightly soluble in ethanol, dissolved in ethyl ether, acetone, benzene. Chemical properties and lively. The flame burning bright than methane. With the formation of explosive mixtures air. Explosive Limit 3.02% -34%, spontaneous combustion temperature of 543 ° C. Petrochemical is one of the basic raw materials. Used in the manufacture of synthetic rubber, synthetic resin, synthetic fiber, plastics. Polyethylene is a very important plastic, its production on behalf of a national organic industrial development level. Also available for synthesis of explosives and ethanol, acetaldehyde, acetic acid, ethylene oxide, such as organic synthesis products, can substituting for acetylene cutting and welding metals, but also for artificial fruits mature accelerator. May liquefied natural gas, liquefied petroleum gas, naphtha (naphtha), light diesel oil, heavy oil or crude oil produced by pyrolysis of the pyrolysis gas separation, while vice-propylene, butadiene, toluene, xylene, etc.. COG also be set aside or ethanol in the presence of alumina catalyst from dehydration.
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