Effect of Oxygen on Chlorine-sensitized Photooxidation of 1, 1, 2-Trichloroethane

Abstract

The photooxidation of 1, 1, 2-trichloroethane (TEC) to give chldroacetyl chloride (MCAC)and dichloroacetyl chloride (DCAC) in the presence of chlorine has been investigated under various conditions.
The rates of consumption of TCE and pf formation of MCAC and DCAC under the feed rates of chlQrine and oxygen of O.1 and O.05 mol/hr, respectively, are expressed as follows:
kT/min-i=2.16 exp(-4380/R T)
k cAc/min =2.24 10 exp(6320 RT)
k: DcAc/min"i=o.112 exp(-4150/RT)
The ratio of oxidation to chlorination increases with increasing oxygen pressure. The relation between these reaction rate constants and the oxygen pressure (Po, atm) at 50"C is given by the equation:
kT x Po, CAC/mi O.31.73 Po,