The company suffered a bad case of deferred maintenance at the Powell River mill on October 17, 1994, when an overfilled wooden pulp vat burst, sending metal fragments flying into two nearby tanks containing 650,000 liters of liquid chlorine dioxide
. To prevent the formation of deadly gas, the tanks had to be flushed into Malaspina Strait.
Chloramine and potassium permanganate will not form these chlorinated T&O compounds and chlorine dioxide
can be used to oxidize and remove them.
Upon start-up in the fall of 1991, the project will substantially increase the mill's ability to substitute chlorine dioxide
for chlorine in the bleaching of kraft pulp, significantly reducing the amount of chlorinated organics in the mill's effluent, including dioxins.
researchers measured high levels of chlorine dioxide
, a chemical also found over the Antarctic during the dramatic seasonal loss of ozone.
APPLICATION: Although a hot acid stage reduced the AOX analyzed in the subsequent chlorine dioxide
stage, it was not effective in reducing the total stable AOX in the bleaching sequence.
Water analysis specialist Palintest have introduced a new dual-range colorimeter for on-the-spot measurement of chlorine dioxide
levels in water.
AS EARLY as about 1900, the use of chlorine dioxide
for water disinfection had been tried experimentally, but practical application proved infeasible because of the instability of the gaseous materials and because of the necessity for on the spot generation.
Sales of products using the company's core chlorine dioxide
technology grew by 22% compared to non-core products, which decreased by 5%.
Gaseous chlorine dioxide
is generated by combining an equal amount of impregnated sodium chlorite and activating acids in a sachet.
When these chemicals are mixed they form chlorine dioxide
- the same ingredient used in some bleaches.