Treatment of waste containing metal chlorides
CA 2108114 A1 · Owner: Tioxide Group Services Limited · Inventors: Gibson, Andrew Jon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the treatment of waste containing metal chlorides comprises heating the waste in the presence of oxygen and water at a temperature of at least 350°C. The hydrogen chloride generated is passed through a gas scrubber in which any entrained solids are removed by contact of the gas with liquid aqueous hydrochloric acid. The process is particularly suitable for wastes generated during the chlorination of titaniferous ores. The process enables the chlorides to be converted to oxides which can be disposed of with minimal environmental impact or used as a source of trace elements and also provides a convenient means of generating relatively pure hydrogen chloride or hydrochloric acid.
Read the whole patent
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
- Filed October 8, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 8, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2015.
- 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.