Selective removal and recovery of ammonia and hydrogen sulfide
CA 1185416 A · Owner: Chevron Research And Technology Company · Inventors: Farrell, Thomas R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydrocarbon material is subjected to severe hydrotreatment and washed with only enough water to absorb the bulk of the H2S but only a fraction of the NH3 present in the hydrocarbon material. The washed hydrotreated hydrocarbon material is separated from the water stream and then a vapor phase is separated from the hydrocarbon material in a high pressure separator. The vapor phase is scrubbed with water to form an aqueous solution of NH3 which contains only a minor amount of H2S (an NH3 to H2S ratio of at least 6:1).
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
- Granted April 16, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 2002.
- 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.