Ethylene

CAS RN:74-85-1

Reactivities / Incompatibilities

Incompatible materials: Strong oxidizing agents, carbon tetrachloride, chlorine, copper, vinyl compounds.
Reacts vigorously with oxidizing materials.
In absence of nitrogen as a diluent, interaction with /trifluoromethyl hypofluorite/ ... /and/ ethylene is explosive on mixing.
Explosive reaction with chlorine is possible.
Mixtures with aluminum chloride explode in the presence of nickel catalysts, methyl chloride, or nitromethane.
Explosive reaction with bromotrichloromethane (at 120 deg C/51 bar), carbon tetrachloride (25-100 deg C/30 bar).
Explosive reaction with chlorine catalyzed by sunlight or UV light or in the presence of mercury(I) oxide, mercury(II) oxide, or silver oxide.
Mixtures with chlorotrifluoroethylene polymerize explosively when exposed to 50 kV gamma rays at 308 krad/hr.
Violent polymerization is catalyzed by copper above 400 deg C/54 bar.
Incompatible with aluminium chloride, (carbon tetrachloride + benzoyl peroxide), (bromotrichloromethane + aluminium chloride), ozone, carbon tetrachloride, chlorine, nitrogen oxides, tetrafluoroethylene trifluorohypofluoride.
Incompatible with acids, halogens, nitrogen oxides, hydrogen bromide, aluminum chloride, chlorine dioxide, nitrogen dioxide.
A violent explosion occurred when a mixture of tetrafluoroethylene and excess ethylene was heated at 160 deg C and 480 bar. Traces of oxygen must be vigorously excluded.
Mixtures of ethylene and aluminum chloride, initially after 30-60 bar, rapidly heat and explode in presence of supported nickel catalyst, methyl chloride, or nitromethane.
A gaseous alkene was passed into a cooled autoclave containing the complex, initially with agitation, and later without. Later, when the alkene was admitted to a pressure of 5.6 bar at 2 deg C, a slight exotherm occurred, followed by an explosion. The autoclave contents were completely carbonized. Mixtures of ethylene, aluminum chloride and nitromethane had exploded previously, but at 75 deg C. /Aluminum chloride-nitromethane/
AITs for ethylene-oxygen mixtures at 1 bar in stainless steel were reduced by 30-40 deg C by coating the vessel walls with boron trioxide.
Following a literature method for preparation of 1-bromo-3,3,3-trichloropropane, the reagents were being heated at 120 deg C/51 bar. During the fourth preparation, a violent explosion occurred.
Mixtures of ethylene and carbon tetrachloride can be initiated to explode at temperatures between 25 and 105 deg C and pressures of 30-80 bar, causing a six-fold pressure increase. At 100 deg C and 60 bar, explosion initiated in the gas phase propagated into the liquid phase. Increase of halocarbon concentration in the gas phase decreased the limiting decomposition pressure.
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