Mr. Francis Dube reports
ZEN GRAPHENE SOLUTIONS SUCCESSFULLY TESTS INDUSTRIALLY VIABLE PURIFICATION PROCESS FOR PRE-CURSOR ALBANY GRAPHENE MATERIAL
Zen Graphene Solutions Ltd. has provided an update on the company's recent metallurgical test program, which successfully simulated an industrial process, which was utilized to purify Albany graphite concentrate. This successful test is a significant step forward toward industrial graphene production. A final product purity of approximately 99.8 per cent Cg appears to be the practical upper limit of this hydrometallurgical processing. This final product will be used as a precursor material for the company's developing graphene applications such as graphene-enhanced concrete and other composites.
This work was conducted at SGS Canada Inc. (SGS), Lakefield, Ont., under the supervision of Zen's metallurgist and project manager, James Jordan, PEng. As reported in the July 16, 2018, news release, a new graphite purification process was developed, which eliminated soluble graphite losses, helped increase the total recovery from 75 per cent to 90 per cent and achieved greater efficiency in both chemical reagent consumption and energy input when compared with the previous flowsheet.
Dr. Francis Dube, Zenyatta's co-chief executive officer and head of business development and technology, said: "The successful development of this new industrially viable graphite purification process is an important step in the company's business plan to develop the Albany graphite project for graphene applications. The next step for the company will be to confirm an industrial process to convert purified Albany graphite into graphene."
The new graphite purification process is based on a pressure caustic leach followed by a second-stage purification using acidified ammonium fluoride. Key to the success of the new purification process is the ability to recycle process solutions and a locked-cycle test program was implemented which simulated an industrial process wherein impurities were removed allowing water and reactant to be reclaimed. The six-cycle test demonstrated that stable impurity concentrations could be maintained within the circuit and no buildup of elements detrimental to final product purity was found.
James Jordan, PEng, is the qualified person for the purposes of National Instrument 43-101, and has reviewed, prepared and supervised the preparation of the technical information contained in this news release. SGS performed analyses of all purified Albany graphite samples by direct ash analysis using a platinum crucible, according to a validated method that also accurately quantifies key trace level impurities by subsequent ICP analysis.
About Zen Graphene Solutions Ltd.
Zen Graphene Solutions is an emerging graphene technology solutions company with a focus on development of the unique Albany graphite project as a precursor graphene material product opportunity and product market development. The Albany graphite project provides the company with a competitive advantage in the potential graphene market as independent labs in Japan, the United Kingdom, Israel, the United States and Canada have demonstrated that Zen's Albany graphite/Naturally Pure easily converts (exfoliates) to graphene using a variety of simple mechanical and chemical methods.
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