Sulfur recovery process using metal oxide absorbent with improved purge
CA 1300345 C · Owner: Amoco Corporation · Inventors: Pendergraft, Paul T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Sulfur species are removed from a Claus plant tail gas stream by contacting with ZnO producing ZnS which is regenerated to ZnO by dilute O2. Following regeneration, freshly regenerated ZnO in one ZnO absorber is purged with an effective reducing gas stream producing SO2 emissions while another ZnO absorber is downstream operating under effective absorption conditions for removing thus produced SO2 from the first ZnO absorber effluent. GMB:sdg/tb/jdb 86234ART0015
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 May 12, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 2009.
- 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.