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Molecular formula : C2H4
MW : 28.05
CAS No. 74-83-9-85-1
nature : under normal temperature and pressure as a colorless flammable gas, hydrocarbons slightly peculiar odor. Solidification point -169.4 ° C, the boiling point -103.71 ° C and relative density of 0.5699 (-103.8), the refractive index of 1.363, flash point <Land ° C, 9.90 ° C critical temperature, critical pressure 4 .95 MPa, the critical density 0.227kg / L, expansion coefficient 0.006894 (-17.8 ° C), the latent heat of evaporation 495.98J / g (boiling point). Soluble alcohol ether, insoluble in water. Lively nature.
Preparation : industrial use ethylene production methods for petroleum hydrocarbon cracking, catalytic dehydration of ethanol, coke oven gas separation. Oil and gas rich in resources, mass production of ethylene low cost, good quality. Therefore, a large number of major oil ethylene cracker production. France catalytic dehydration of ethanol is limited to fine chemicals for the small amount of ethylene occasions.
purposes : Petrochemical one of the most basic raw materials. The synthetic material, huge quantities for the production of polyethylene, polyvinyl chloride and vinyl chloride, ethyl benzene, styrene and polystyrene and ethylene-propylene rubber; In organic synthesis, the widely used synthetic ethanol, ethylene oxide and glycol, acetaldehyde, acetic acid, propionaldehyde, such as acid and its derivatives various kinds of basic organic chemicals; by halogenated, system dichloroethene, chloro - ethane and ethane bromide; the system can be gathered by the α-olefins, then the production of higher alcohols, such as alkyl benzene.
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