C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/56
C02F 1/52 (2006.01) C02F 1/28 (2006.01) C02F 1/70 (2006.01) C02F 9/00 (2006.01)
Patent
CA 1124897
ABSTRACT OF THE DISCLOSURE A method is disclosed for removal of free and complex cyanides from water-containing industrial effluents and wastes by treatment with insoluble solid iron sulfides at a pH in the range of about 7.0 to 8.5. The insoluble solid iron sulfides can be chemically prepared prior to treatment or prepared in situ, usually of a particle size smaller than about 5 µ, or supplied in the form of naturally occurring iron sulfides such as pyrrhotite or pyrite having a particle size smaller than about 300 µ, preferably smaller than about 150 µ. The weight ratio of iron sulfide to total cyanide in the effluent is greater than 2:1, preferably greater than about 5:1 for prepared iron sulfides and greater than about 100:1 for mineral sulfides. The presence of a reducing agent such as ferrous ions or sodium sulfite to maintain a non-oxidizing environment during treatment enhances removal of cyanide.
338593
Babcock Alan R.
Kuit Wouterus J. M.
Cominco Ltd.
Gowling Lafleur Henderson Llp
LandOfFree
Process for the removal of cyanides from effluent 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 the removal of cyanides from effluent, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the removal of cyanides from effluent will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1159475