Treatment of effluent
CA 1063584 A · Owner: Peabody Holmes Limited · Inventors: Mills, Brian; Smith, Clive R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Contaminated aqueous alkali wash liquor from the treatment of gases containing hydrogen sulphide and/or hydrogen cyanide is reconstituted by treatment at an elevated temperature in a reducing atmosphere followed by quenching to form reconstituted wash liquor. The contaminated liquor is concentrated, before entering the reducing atmosphere, by direct contact with hot gases derived from the hot reducing atmosphere. Quenching and concentration are carried out by interaction of a gaseous medium with a liquid spray. Generation of the hot reducing atmosphere, reaction of the contaminated liquor with the hot reducing atmosphere and concentration, of the contaminated liquor may be carried out in a …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted October 2, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 2, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.