RbCl production cost analysis

Predicted cost of RbCl production ($/kg Rb) vs. Rb concentration, at varying Na and K levels

Na concentration: 25000 mg/L

K concentration: 5000 mg/L

Cost at 1 mg/L Rb

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Cost at 150 mg/L Rb

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Cost reduction

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2024 market price

$8,000/kg

Based on the regression cost model (Dagan-Jaldety, Nativ, Lahav et al.) for RbCl extraction from brines using Zn-HCF ion exchange chromatography. Cost = 2768 · q_Rb^−0.999, where q_Rb = 263·([Rb]·α_Rb / Σ[n]·α_n) + 2.23·[Rb]_mM. Separation factors: α_Rb=315, α_Na=1, α_K=49.