Process for synthetizing urea from ammonia and carbon dioxide, with total carbon dioxide conversion
CA 2118659 A1 · Owner: Rescalli, Carlo · Inventors: Rescalli, Carlo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR SYNTHETIZING UREA FROM AMMONIA AND CARBON DIOXIDE, WITH TOTAL CARBON DIOXIDE CONVERSION" Abstract, A process for synthetizing urea by starting from NH3 and CO2, with total CO2 conversion is disclosed which comprises:, (a) feeding, in countercurrent mode to a reactive, distillation column, NH3 to the column bottom and CO2 to the central column zone, with a liquid bottom stream being obtained which contains urea NH3 and water, and an overhead gas and/or supercritical stream constituted by NH3 and water being obtained;, (b) feeding the liquid stream coming from the bottom of the reactive distillation column to one or more separation steps, with NH3 containing streams and an urea …
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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 March 9, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 9, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 2016.
- 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
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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.