Frequently Asked


questions ?

What is PBT’s SAL?

SAL stands for Selective Acid Leaching (SAL) and is our patented process to upgrade Mixed Hydroxide Precipitate (MHP) into battery ready nickel and cobalt. Using SAL, we can refine nickel and cobalt intermediates more flexibly with lower capex and opex and a lower environmental footprint than other processing methods.

What is PBT’s CL?

CL stands for Combined Leach. The PBT CL is our process to produce precursor Cathode Active Material (pCAM) NMC from the SAL process products or recycled Black Mass. This process removes the need for Solvent Extraction (SX), Electro refining and Smelting processes from the pCAM production industry.

What is Black Mass?

In many lithium-ion battery recycling process flowsheets, spent batteries are dismantled, and the parts containing the electrodes, such as battery cells, get crushed or shredded to produce a powdery fraction referred to as “black mass.

What are the benefits of PBT?

Our SAL process is simple, faster, and safer making our end-product high-quality, environmentally superior and more affordable. We can also extract a specified quantity of nickel and produce flexible nickel and cobalt products. This could provide our customers with bespoke battery material on demand.

How good are batteries really?

Most mineral and metal processing technologies carry a heavy environmental burden. This is no different for batteries; while they are the “green” option to store energy, significant CO2 emissions are still part of the production process. Our SAL refining process ensures the battery material is produced in an environmentally superior (lower footprint) way whilst maintaining commercial grade quality.

How is PBT environmentally superior?

PBT’s environmental advantage comes from its simplicity. We don’t need to use the same high-heat or toxic solvents; diluents or modifiers as other processes and we produce less waste and tailings. We create a strong clean separation of nickel and cobalt and can extract very high levels of the metals though our process.

What are the next steps for PBT to produce commercial quantities?

We are currently producing commercial sample qualities and quantities from our demonstration plant in preparation for our commercial refinery in North Queensland. Once fully operational we will be able to process 250,000t of MHP and produce battery material products containing in excess of 25,000tpa in Nickel and Cobalt as a starting point. This plant is an important step in our corporate strategy and provides tangible evidence of the benefits of our SAL process.

Why should we choose you as an MHP refinery?

We can provide a better environmental option. We can process MHP into a variety of different Nickel and Cobalt products. We have the ability to recycle battery products. We are faster, safer and backed by the University of Queensland and the Australian Government. We are unique in the market and are driving the real clean energy evolution.


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Level 32
10 Eagle Street
Brisbane QLD 4000

+ 61 7 3051 0643