C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/02 (2006.01) C01C 3/08 (2006.01) C02F 1/58 (2006.01) C02F 1/66 (2006.01)
Patent
CA 2091800
A process is provided for removing ammoniacal values of potential environmental concern, both present and latent, from cyanate-containing waste streams and water-wet waste solids, typically generated in gold leaching or electroplating operations. The process includes heating the waste material to a temperature in excess of 50°C to convert ammonium cyanate to urea and optionally reducing pH to a range of 2.5 to 5 to accelerate hydrolysis of cyanate to ammonium carbonate, to supply ammonium ions for reacting with unhydrolyzed cyanate.
Devries Frederick William
Ridout & Maybee Llp
LandOfFree
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