Lepidico Limited announced that assay results from the recent pilot plant lithium hydroxide monohydrate batch trials have been received, with a purity of >56.5% LiOH achieved, which is consistent with a nominal battery grade reference purity of 56.5% LiOH. Importantly, impurity levels of the deleterious elements for battery grade specifications were below required levels and often below detection limits. These results confirm the viability of LOH-MaxTM at pilot plant scale as a new process for the production of high purity lithium hydroxide from a lithium sulphate intermediate, importantly without the production of potentially problematic sodium sulphate as a by-product. Stockpiled lithium sulphate liquor from Campaign 1 of the continuous L-Max® pilot plant were used as feed to the LOH-MaxTM pilot. The LOH-MaxTM trial was conducted in a series of large-scale batch operations, performed in sequence to match the process flowsheet. Key recycle streams were introduced back into the LOH-MaxTM process in order to properly account for any build-up of impurities. Given the relatively benign nature of the materials in the process, no exotic materials of construction were required and the major equipment employed was sourced from the existing L- Max® pilot plant. The process involves generation of an initial crude lithium hydroxide followed by refining into a high purity lithium hydroxide monohydrate product. Optimisation testing, conducted in parallel to the LOH-MaxTM pilot identified a number of improvements to the process that have led to modifications to the previous design for the Phase 1 Plant. Carbon dioxide represents a challenge in the refining and sampling of high purity lithium hydroxide monohydrate due to its affinity to absorb CO2 from the air. A method for sampling high purity LiOH.H2O immediately after production was developed by Strategic Metallurgy and successfully trialled in early January 2020. Work has now started on refining a larger sample of high purity lithium hydroxide monohydrate, which is planned to be used to start the product qualification process with prospective customers.