Heat recovery in black liquor oxidation
CA 1232712 A · Owner: Air Products And Chemicals, Inc. · Inventors: Elton, Edward F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The black liquor from a kraft pulping process after intermediate concentration and prior to its introduction into the conventional recovery furnace is subjected to wet oxidation with high purity oxygen. The heat of such oxidation is used to flash the liquor to dry or semi-dry solids (80-100% solids concentration) and the resulting steam is available as process steam utilized upfitream in the evaporation sequence. The hazard of recovery boiler explosion is thus reduced or eliminated and net steam recovery is considerably improved.
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 February 16, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 16, 2005.
- 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.