Inhibiting leaching of metals from catalysts and sorbents and compositions and methods therefor
CA 1296190 C · Owner: Bonee, Joseph C. · Inventors: Bonee, Joseph C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Bonee, ABSTRACT OF THE DISCLOSURE During use in hydrocarbon conversion processes sorbents, e.g. for carbon and metals, and catalysts become contaminated with metals, e.g. heavy metals such as vanadium, nickel and sodium. Lifting of heavy metals can be sharply reduced prior to disposal of such spent particulate materials by treatment with alkaline earth metal compound, e.g. lime, calcium fluoride calcium, sulfate, and barium chloride. Surprisingly calcium, chloride, calcium carbonate, sodium bicarbonate are relatively ineffective. Related is RI-6158.
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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
- Granted February 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2009.
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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.