15th Jan 2016 08:20
LONDON (Alliance News) - Alexander Mining PLC on Friday said its MetaLeach Ltd subsidiary has been granted a patent in Peru for extracting zinc from aqueous ammoniacal solutions.
The patent, number 7520, has a standard term of 20 years from the effective date of December 22, 2009.
"The technology which is the subject of this patent provides for the economic recovery of zinc from aqueous ammoniacal zinc solutions, such as those produced in our proprietary AmmLeach processing technology. We are pleased with the grant of the patent in Peru as the country has high potential for the use of our AmmLeach processing technology for zinc extraction," Chief Executive Martin Rosser said in a statement.
The patent, which had been granted already in the US, Canada, Australia and Mexico, describes a method for extracting zinc from an aqueous ammoniacal zinc solution containing impurities.
Shares in Alexander Mining were down 14% at 0.150 pence on Friday morning.
By Samuel Agini; [email protected]; @samuelagini
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