Patent Granted for Leaching of Copper & Molybdenum

24 June 2015

Alexander Mining plc

('Alexander' or the 'Company')

Patent Granted in USA for a Method of Leaching of Copper and Molybdenum

Alexander is pleased to report that it has received notification that its MetaLeach Limited ("MetaLeach") subsidiary has been granted a patent for a Method of Leaching of Copper and Molybdenum in USA, patent number 9,011,574. This patent forms part of MetaLeach's family of core AmmLeach® technologies and has a standard term of twenty years from the effective date of 29 August 2011 (being the date of original filing) along with a 111 day patent term adjustment.

Description

The patent describes a method for leaching copper and molybdenum from a material, selected from a group consisting of one or more of an ore, residue, or concentrate containing such, in which more than 1 % w/w of the total molybdenum is present as a sulphide and in which more than 1% w/w of the total copper is present as an oxide, the method comprising the steps of: Exposing the ore, residue and/or concentrate to an aqueous solution of chlorine (l)-based oxidizing species of a pH of at least 3.0; oxidizing the molybdenum by the chlorine-based oxidising species thereby providing a treated material and a reduced aqueous solution of chlorine-based oxidizing species; leaching the treated ore, residue and/or concentrate by exposing the treated ore, residue and/or concentrate to an aqueous ammoniacal ammonium carbonate solution to form a pregnant leach solution containing both copper and molybdenum; and passing the pregnant leach solution containing both copper and molybdenum to a means for metal recovery.

Forward Looking Statements

This news release may contain forward looking statements, being statements which are not historical facts, including, without limitation, statements regarding potential mineralization, exploration results, resource or reserve estimates, anticipated production or results, sales, revenues, costs, "best-efforts" financings or discussions of future plans and objectives. There can be no assurance that such statements will prove accurate. Such statements are necessarily based upon a number of estimates and assumptions that are subject to numerous risks and uncertainties that could cause actual results and future events to differ materially from those anticipated or projected. Important factors that could cause actual results to differ materially from the Company's expectations are in Company documents filed from time to time with the TSX Venture Exchange and provincial securities regulators, most of which are available at www.sedar.com. The Company disclaims any intention or obligation to revise or update such statements unless required by law.

ENDS

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