Continuous process for neutralization of aluminate solution to form gels and apparatus therefor
CA 1207630 A · Owner: Aluminum Company Of America · Inventors: Pearson, Alan; Larrousse, Mark F.; Fleming, Hubert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Alumina gel is produced on a continuous basis in a stirred reactor into which is bubbled carbon dioxide to neutralize an aluminate solution feeding into the reactor. Careful control of the process parameters including pH, residence time, temperature and gas flow rate as well as the, geometry of the reactor and other apparatus parameters can, result in the formation of preselected types of gel. When pseudoboehmite is formed in accordance with the invention alumina gels can be formed with surface areas as high as 300 to 700 square meters per gram.
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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 July 15, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 15, 2003.
- 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
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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.