Press Releases

Dundee Sustainable Technologies Announces a Gold Extraction Yield of 97.3% from Gold Concentrate at Demonstration Plant

December 13, 2016

MONTREAL, QUEBEC, December 13, 2016 – Dundee Sustainable Technologies Inc. (“DST” or the “Corporation”) (CSE: DST) is pleased to announce successful extraction results on gold concentrates (the “Concentrate”) from Chile using DST’s proprietary chlorination technology at its Demonstration Plant in Quebec.

A gold extraction yield of 97.3% has been achieved at the outlet of the chlorination reactor with full environmental controls over the sulfur and mercury content.

“These results are another important demonstration of the efficiency and effectiveness of the DST chlorination process and of its potential as a robust and environmentally friendly alternative to cyanide extraction in the gold mining industry,” said Mr. Brian Howlett, President and CEO of DST. “We are partnering with a number of mining companies in an effort to advance our technology and further explore the commercialization of our patented process.”

In September 2015, DST entered into an agreement with a Chilean mining company for the processing of gold concentrate at the pilot scale using the chlorination process. Excellent results at the pilot scale enabled DST to move forward on to the next stage, which involved the processing of the concentrate which contained an estimated 110 g/tonne of gold, copper grades of 9.0% and mercury content in excess of 700 g/tonne at the Demonstration Plant.

DST processed 40 tonnes of this complex material which is difficult to process using conventional processing methods without the associated environmental liabilities and metallurgical challenges (Refer to September 23, 2015, March 1, 2016 and May 31, 2016 press releases). In particular, the 700 g/tonne of mercury was effectively removed during processing to a level of 99%.

DST has completed the processing of this concentrate and is in the final stages of completing the technical report related to this demonstration campaign. Management looks forward to beginning the technological economic study for the location of the first commercial DST plant.

The Company also announced the resignation of Mr. John Mercer from the Board of Directors and wishes to thank him for his contribution.

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