Heat treated active carbons for use in denitration, processes for producing same, denitration method using same, and denitration systems using same
CA 2206672 C · Owner: Kasuh, Takahiro · Inventors: Setoguchi, Toshihiko; Yasutake, Akinori; Mochida, Isao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a technique for removing nitrogen oxides (NO x) present in exhaust gases discharged from boilers and the like. When the temperature of the exhaust gas is 100°C or below, a heat-treated active carbon produced by heat-treating a raw active carbon at 600 to 1,200'C in a non-oxidizing atmosphere so as to remove oxygen-containing functional groups present at the surfaces thereof and thereby reduce the atomic surface oxygen/surface carbon ratio to 0.05 or less is preferably used. When the temperature of the exhaust gas exceeds 100'C a heat-treated, active carbon produced by heat-treating a raw active carbon at 600 to 1,200°C in a non-oxidizing atmosphere and activating …
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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
- Filed September 24, 1996 and granted May 1, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 24, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 2018.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.