Propene

1.Chemical name： propylene / propene

Technical specification code： 31

CAS No.： 115-07-1

molecular formula： C3H6

molecular weight： 42.081

Chemical equation for combustion of propylene:2C3H6+9O2=6CO2+6H2O

2.physicochemical property

Appearance and properties: colorless gas with a smell of hydrocarbons.

melting point (℃)： -191.2

boiling point (℃)： -47.72

Demsoty  ratio(water=1)： 0.5

Relative vapor density (air =1) : 1.48 

Saturated vapor pressure (kPa) : 602.88(0℃) 

Heat of combustion (kJ/mol) : 2049 

Critical temperature (K) : 364.75 

Critical pressure (MPa) : 4.550 

Flash point (℃) : -108 

Ignition temperature (℃) : 455 

Upper explosion limit %(V/V) : 11.7 

Lower limit of explosion %(V/V) : 2.0 

Solubility: soluble in water and ethanol. 

3.Other physical and chemical properties: propylene can react on methyl in addition to the ene bond.  Propylene polymerises in the presence of acidic catalysts (sulfuric acid, anhydrous hydrofluoric acid, etc.) to form a mixture of dimer, trimer, and tetramer that can be used as a high octane fuel.  Propylene is polymerized to polypropylene in the presence of ziegler catalyst.  Propylene is copolymerized with ethylene to form ethylene propylene rubber.  Propylene reacts with sulfuric acid to form isopropyl sulfuric acid, which hydrolyzed to form isopropyl alcohol: Propylene reacts with chlorine and water to form 1-chloro-2-propyl alcohol, which reacts with a base to form propylene oxide, and water to form propylene glycol:  Propylene reacts with benzene in the presence of an acidic catalyst to form ipropylbenzene C6H5CH (CH3)2, which is the raw material for the synthesis of phenol and acetone.  In the presence of acid catalysts (sulfuric acid, hydrofluoric acid, etc.), propylene can be alkylated with isobutane, resulting in branched alkanes that can be used as fuels with high octane numbers.  In the presence of a catalyst, propylene reacts with ammonia and oxygen in air by ammoxidation to produce acrylonitrile, a raw material for the synthesis of polymers such as plastics, rubber and fibers.  Propylene is chlorinated at high temperature to produce allyl chloride CH2=CHCH2Cl, which is the raw material for the synthesis of glycerol. 

The main purpose 

The largest amount of propylene is used in the production of polypropylene, in addition, propylene can be acrylonitrile, isopropanol, phenol and acetone, butanol and octanol, acrylic acid and its lipids and propylene oxide and propylene glycol, epichlorohydrin and glycerol synthesis.