Methods for enhancing the acid sites of fcc catalysts
CA 2327622 A1 · Owner: Pavel, Stephen K. · Inventors: Pavel, Stephen K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention discloses aqueous methods for enhancing the acid sites of fluid catalytic cracking (FCC) catalysts. The methods comprise the steps of contacting an FCC catalyst, either spent or fresh with an aqueous solution , comprising water an inorganic acid substantially free of chloride and aluminum. The acid is preferably sulfurous or sulfuric acid. The aluminum is provided by an aluminum source selected from the group consisting of the alumina trihydrates and aluminum oxide. Chloride contamination of the aluminum source should be minimal, preferably less than about 1000 ppm chloride more , preferably less than about 200 ppm chloride. The pH of the aqueous solution is …
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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 April 5, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 2021.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.