Black water recycle circulation loop use with a gasifier
CA 2442060 C · Owner: Seufert, Frederick B. · Inventors: Hwan, Judy R.; Tse, Daniel W.; Seufert, Frederick B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is generally directed to handling the raw syngas scrubbing wastewaters, or black water, from a quench gasification reactor. More particularly, the present invention describes recirculation of the black water in a recirculation loop from which at least a portion of the moderator used in the gasifier may be taken. The use of a recirculation loop for the black water permits the operation of the gasifier in situations such as when a source of high pressure steam is inadequate. The present invention also permits the service and maintenance of the black water treatment system while permitting the continued operation of the gasifier.
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
- Filed April 3, 2002 and granted August 9, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 3, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 2024.
- 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.