Alexander Mining PLC Patent Granted in Zambia (9349F)
February 26 2018 - 7:05AM
UK Regulatory
TIDMAXM
RNS Number : 9349F
Alexander Mining PLC
26 February 2018
26 February 2018
Alexander Mining plc
('Alexander' or the 'Company')
Patent Granted in Zambia for a Method for Leaching Cobalt from
Oxidised Cobalt Ores
Alexander is pleased to report that it has received notification
that its MetaLeach Limited ("MetaLeach") subsidiary has been
granted an African Regional I.P.O. ("ARIPO") Patent in Zambia for a
Method for leaching cobalt from oxidised cobalt ores, patent number
AP 4394. The patent has a standard term of twenty years from the
effective date of 6 August 2010 (being the date of original filing
of the PCT Application from which the ARIPO patent is derived).
Martin Rosser, Chief Executive Officer, said:
"The technology described in the patent has potential
application for the extraction of cobalt from a range of oxidised
or non-sulphide deposits. Cobalt, an essential component of lithium
ion batteries, is a core target metal for the commercialisation of
our intellectual property and we now have patent protection
coverage in Zambia, one of the world's most prospective countries
of patent use."
The patent describes a method for leaching cobalt from a
non-lateritic oxidised cobalt ore, comprising the method steps
of:
-- curing the non-lateritic oxidised cobalt ore to be leached
through the application of an aqueous solution of a cobalt reducing
agent selected from the group: iron (II) salts, sulphite salts,
sulphur dioxide, and combinations thereof; at a pressure of between
about atmospheric pressure and about 5 atmospheres, at a
temperature between about 5degC and about 65degC;
-- wherein the pH of the aqueous solution of the cobalt reducing
agent is between about 1.0 and 10.0; and wherein the relative
volumes of the aqueous solution of the cobalt reducing agent and
the non-lateritic oxidised cobalt ore to be leached are such that
the combination of the aqueous solution of the cobalt reducing
agent and the non-lateritic oxidised cobalt ore to be leached forms
a mixture with a solids content not less than about 100 g/L of
aqueous solution;
-- substantially retaining the aqueous solution of the cobalt
reducing agent in contact with the non-lateritic oxidised cobalt;
and
-- leaching the cured ore at a pressure of between about
atmospheric pressure and about 5 atmospheres, at a temperature
between about 5degC and about 65degC, through the application of an
ammonium carbonate solution containing free ammonia thereby
producing a pregnant leach solution; then passing the pregnant
leach solution resulting to a means for cobalt recovery.
ENDS
For further information, please contact:
Martin Rosser
Chief Executive
Mobile: +44 (0) 7770 865
341
Alan Clegg
Non Executive Chairman
Mobile: +90 543 533 0665
Alexander Mining plc
Tel: +44 (0) 20 7078 9566
Email: mail@alexandermining.com
Website: www.alexandermining.com
Northland Capital Partners
Limited
Matthew Johnson / Dugald
J. Carlean
+44 (0) 20 3861 6625
(Corporate Finance)
John Howes
(Corporate Broking)
Turner Pope Investments
(TPI) Ltd
Andy Thacker
+44 (0) 20 3621 4120
This information is provided by RNS
The company news service from the London Stock Exchange
END
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