Study of the Chlorine-Basic Hydrogen Peroxide Reaction.
CLARKSON COLL OF TECHNOLOGY POTSDAM NY
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The reaction of chlorine with alkaline hydrogen peroxide solutions, approximately 2.5M in 02H-, has been examined in an unagitated batch reactor at 10 degrees C. Initial chlorine partial pressures of up to 450 torr and reaction times of one, three and six minutes were investigated. The results are in qualitative agreement with the theory for absorption with an instantaneous reaction, in which the rate of reaction becomes controlled by liquid phase mass transfer after an initial, rapid reaction depletes the interfacial region of 02H- reactant. The effective anion diffusivity was on the order of 7 times 10-4 sg. cm per sec, a value much larger than typical liquid diffusivities. The rate of reaction declined faster than the time -12 dependence predicted by the theory for absorption with an instantaneous reaction. In one minutes time, complete conversion of all added chlorine to chloride ion was achieved until 4.7 time 10--4 moles of chlorine per sq. cm of interfacial area have reacted. Subsequent reaction was almost independent of initial chlorine partial pressure. The amount of chlorine reaction was not sensitive to the rate of oxygen produced by hydrogen peroxide disproportionation. The rate of disproportionation was seen to depend in a complicated manner on the composition of the alkaline solutions.
- Inorganic Chemistry
- Lasers and Masers