Apr 21 2017
MGX Minerals Inc. is pleased to announce it has received independent laboratory-testing results from the Saskatchewan Research Council on the Company’s patent-pending “Method for Extraction of Lithium from Salt Brine” (U.S. Provisional Patent #62/419,011).
As reported by SRC, the Company’s proprietary design process was successful in recovering up to 83.7% lithium (Li) and concentrating 461 ppm Li from a 71 ppm representative sample of formation brine originating from the Sturgeon Lake oilfield.
“The results of laboratory testing by SRC provide third-party validation of our proprietary design process and its ability to rapidly separate lithium and other valuable minerals from wastewater brine,” stated MGX President and CEO Jared Lazerson. “We have made many advancements since this original process design, but this validation is important and we will continue to rely on SRC for independent testing and improvements of both active and newly developed passive filtration technologies.”
Excerpts from the SRC Summary Report- Metallurgical Tests and Executive Summary- are outlined verbatim below. Note that certain portions of the report have been redacted to protect proprietary information and data:
Table 1. Assay Results of the as Received Brine Sample
SRC independently carried out multi-stage evaporation tests following the patent-pending design process as provided by MGX. As reported by SRC in the executive summary:
- It was not feasible to remove 90% of the water in the primary evaporation of the Formation brine because the formation of the jel-like material made the filtration impossible. The maximum water evaporation was 66% of the feed brine mass before the jel formation. Approximately 97% of Na, 26% of K, 35% of Ca and 29% of Mg were precipitated. The recovery of Li and Sr was 75.6% and 68.8%, respectively.
- The modified processes including magnesium precipitation by lime followed by the primary evaporation to precipitate NaCl and the secondary evaporation to precipitate CaCl2 and concentrate lithium.
- The Mg removal was very effective and more than 99.99% of Mg was removed. The residue Mg in the brine was less than 0.1 ppm. The lithium recovery was 84.1% and the Sr recovery was 80.1%.
- In the primary evaporation process, 67% of the feed brine mass was evaporated as water and more than 96% of Na was removed as NaCl. There were almost no Li or Sr loss in this process. Li was concentrated from 60 ppm to 321 ppm.
- In the secondary evaporation process, 26% of the feed brine mass was evaporated as water and 12% of Ca was removed as CaCl2. The lithium recovery was 94.1% and the Sr recovery was 94.6%. The sample turned to a jel-like material after further evaporation to remove 40% of the brine mass as water.
- In the whole process, the estimated water evaporated was 72% of the total feed brine mass. More than 99.99% of Mg, 99% of Na, 45% of K and 25% of Ca were precipitated from the brine. The overall recovery was 83.7% for Li and 77.2% for Sr. Lithium was concentrated to 461 ppm from 71 ppm. However, the impurity level, especially Ca, was still very high and further removal of Ca through evaporation is not feasible.
SRC has provided the Company with several recommendations to remove Ca impurity levels. The full report will be filed on SEDAR within 45 days.
Qualified Person
The technical portions of this press release were prepared and reviewed by Andris Kikauka (P. Geo.), Vice President of Exploration for MGX Minerals. Mr. Kikauka is a non-independent Qualified Person within the meaning of National Instrument (N.I.) 43-101 Standards.
MGX may decide to advance its petrolithium projects into production without first establishing mineral resources supported by an independent technical report or completing a feasibility study. A production decision without the benefit of a technical report independently establishing mineral resources or reserves and any feasibility study demonstrating economic and technical viability creates increased uncertainty and heightens economic and technical risks of failure. Historically, such projects have a much higher risk of economic or technical failure.
Source: https://www.mgxminerals.com/investors/news/2017/256-mgx-minerals-receives-independent-confirmation-of-rapid-lithium-extraction-process.html