Manufacture of ammonium nitrate
CA 1107936 A · Owner: Foster Wheeler Energy Corporation · Inventors: Froehlich, Robert E.; Baldini, Reginald A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a process for the manufacture of ammonium nitrate using urea process tail gas, the tail gas including ammonia, carbon dioxide and water vapor. The process includes the steps of: reacting water with nitrogen dioxide in an absorption tower to form nitric acid; reacting the urea process tail gas with the nitric acid to yield an aqueous solution including ammonium nitrate and water, and a tail gas including carbon dioxide, ammonia and water vapor; adding a carrier gas to the ammonium nitrate process tail gas to yield a resultant gaseous stream; cooling the resultant gaseous stream to approximately 60°C, a portion of the water vapor included in the resultant stream being condensed …
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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 September 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 1, 1998.
- 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.