Modified alcohol frothers for froth floation of sulfide ore
CA 1265263 C · Owner: Sherex Chemical Company Inc. · Inventors: Keys, Robert O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a process for the concentration of sulfide ore wherein an aqueous slurry of sulfide ore particles are subjected to sulfide ore froth flotation under sulfide ore froth flotation conditions. The improvement in process comprises using an effective amount of a frothing agent selected from the group consisting of: (a) the reaction product of a C5-C10 diol and a C1-C7 carboxylic acid; (b) the reaction product of a C5-C10 diol and an acrylonitrile; (c) the reaction product of a C2-C4 alkylene oxide and a C1-C7 carboxylic acid;, (d) the reaction group of a C2-C4 alkylene oxide and a C5-C10 diol; (e) the reaction product of a C2-C4 alkylene oxide and an acrylonitrile; and (f) mixtures …
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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 January 30, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 30, 2007.
- 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.