C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/44.5
C02F 1/78 (2006.01) B01F 3/04 (2006.01) C02F 3/20 (2006.01)
Patent
CA 1116762
PROCESS FOR TREATING CYANIDE AND CYANATE CONTAINING WASTEWATERS ABSTRACT OF THE DISCLOSURE A process for treating a cyanide and cyanate-containing aqueous influent such as a wastewater stream is provided. A two- stage method is included for destroying a cyanide-containing in- fluent which comprises; (a) introducing said cyanide-containing influent into a first ozone-contacting zone; (b) contacting said influent in said first zone with a second ozone-containing gas, at least a portion of said second ozone-containing gas comprising a first ozone-depleted gas with- drawn from a second contact zone to form a first cyanide-depleted effluent and a second ozone-depleted gas; (c) introducing said first oyanide-depleted effluent into a second ozone-contacting zone; (d) contacting said effluent in said second zone with a first ozone-containing gas to form a second cyanide-depleted effluent and a first ozone-depleted gas; (e) withdrawing said first ozone-depleted gas from said second contact zone; and (f) withdrawing said second cyanide-depleted effluent from said second zone. A single stage method is also provided in this invention. Both single stage and double stage embodiments employ a turbine- gas injector in each ozone-contacting zone to accomplish a high mass transfer of the ozone-containing gas to the influent. In both the single stage and double stage method, the cyanide- depleted effluents may be recycled to the aqueous influent stream prior to its introduction to either the first or second ozone- contacting zone or to the contacting zones themselves to destroy - 1 - cyanides and cyanates in these effluents. This destruction is accomplished by allowing residual ozone or other oxidizing species in the recycled effluent to react with the cyanide/cyanate species and reducing influent concentrations by diluting the influent entering the contacting zones while at the same time obtaining lower ozone-containing gas to liquid (G/L) ratios. In a further embodiment of this invention a method for treating a cyanate-containing influent formed by oxidizing cyanide by any of the above described methods is provided which comprises further multiple ozone-treatment stages. -2-
330355
Gowling Lafleur Henderson Llp
Tii Corporation
LandOfFree
Process for treating cyanide and cyanate-containing wastewaters does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for treating cyanide and cyanate-containing wastewaters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for treating cyanide and cyanate-containing wastewaters will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1036733