Water separation process
CA 2124933 A1 · Owner: Brierley, Rowland J.P. · Inventors: Shilling, Neil D.; Schofield, Brian; Roberts, Jane A.E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Water present in a hot gaseous product stream from a reactor system (A, B) (Figure 1) containing hydrogen fluoride is separated from the stream in order to eliminate a potentially corrosive combination of water and HF. The water is removed by contacting the gaseous product stream with liquid HF in a distillation column so as to obtain a bottom product containing liquid HF and water and a top product containing dry HF and the product to be recovered. The invention encompasses the separation process a vessel for, carrying out the process (Figures 2 to 4) a control system for the , liquid HF supply to the distillation column (Figures 5 and 6) and a recovery system for recovering HF employed …
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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
- Filed November 25, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2014.
- 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.