Extraction of copper values from aqueous solutions with hydroxy-oximes
CA 1083828 A · Owner: Shell Canada Limited · Inventors: Van Der Zeeuw, Abraham J.; Taylor, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is described for the separation of copper values from an acidic aqueous solution thereof by liquid-liquid extraction with an extractant comprising an organic solvent and a dissolved hydroxy-oxime. The process utilizes a known hydroxy oxime of the general formula A- C(=NOH) - R, (I), in which R represents a hydrogen atom or an aliphatic group and A an aromatic group carrying as substituents a hydroxyl group at a ring carbon atom in a 2-position-the number 1 being assigned to the ring carbon atom to which the -C(=NOH)-R group is attached- and optionally an organic group D and/or (2), a known 2-hydroxybenzophenone oxime substituted by a saturated or ethylenically unsaturated …
Read the whole patent
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 August 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 1997.
- 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
Timeline From CIPO dates
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.