Process to recover lead compounds
CA 1268564 C · Owner: Gock, Eberhard · Inventors: Heinrich, Gerhard; Gock, Eberhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The enrichment and recovery of lead compounds from wastes and intermediate products from hydrometallurgical production and processing of base metals as well as from complex oxidic ores is either difficult to achieve or connected with intense energy consumption. In this invention, direct flotation of lead compounds is applied for the abovementioned purpose which is carried out by, using amine based collecting and foaming reagents in a pH range of < or = 3 in the presence of inorganic acids and higher amounts of dissolved heavy metals from leaching processes.
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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 May 1, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 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
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.