Temperature — 25–300 °C (vs. 1,000 °C+ pyrometallurgy)
PCE is a patented electrochemical process that replaces cyanide with benign reagents and electrons. It selectively recovers gold, silver, PGMs, and rare earths at 90% yields from refractory and low-grade ores — while operating at 25-300°C and producing high-value nanopowder outputs at up to 25× bullion premium.
PCE is the proprietary recovery technology of Geoenergy Solutions, a subsidiary of Bober Khan Wealth Holdings. It targets the recovery of precious metals, PGMs, and rare-earth elements from secondary resources — mining tailings, smelter flue dust, metallurgical wastewater, and refractory low-grade ore — where traditional cyanidation and pyrometallurgy fail.
The patent envelope rests on controlled electrode potential driving selective metal deposition — a fundamentally different mechanism from galvanostatic (current-controlled) electrowinning. Pulse-waveform control of the cathode potential enables selectivity at the ion level: gold deposits, copper stays in solution, arsenic is rejected, neodymium reports separately from dysprosium — all in one cell.
The underlying controlled-potential electrolysis principle was industrially validated at KGHM Polska Miedź in 2013 on copper electrorefining. The technology platform is now adapted, patented, and being deployed for the recovery of gold, silver, PGMs, and rare-earth elements across XTOMORROW's mining-asset portfolio.
The full PCE flowsheet is a closed-loop, four-stage process running from raw secondary feed to high-value finished product. Every stage is electrochemical or physical — no cyanide, no concentrated acid, no pyrometallurgical smelter.
Crush, grind, and flotation of tailings or low-grade ore. Targets the "invisible" gold locked in pyrite at feed grades of 0.1–10 g/t Au that conventional cyanide circuits cannot recover.
Cyanide replaced by thiourea or glycine (for Au/Ag) and dilute organic acids (for REEs). Achieves ~90% Au yield into solution; 85% REE yield from leachates as dilute as 0.01–1 g/L.
The electrochemical core. Selective pulsed electrolysis — short, controlled-potential pulses deposit gold at 99.9% purity (ASTM B562 Grade 1) while rejecting copper, zinc, lead, arsenic, and other matrix impurities.
Bulk gold ingots, gold/silver powders, or 10–60 nm nanopowders — the premium product, valued at $50–$2,000/kg vs. ~$80/g bullion (up to 25× bullion premium).
Conventional electrowinning is galvanostatic — operators fix the current and let the cell potential drift. That works for single-metal copper refining but cannot discriminate between ions in a complex mixed-metal electrolyte.
PCE is potentiostatic with pulse-waveform control. Operators fix the cathode potential to the precise reduction potential of the target metal. Pulses cycle the potential — short anodic pulses control the shape and size of the deposited particle. The result: 99.9% Au from a feed solution that may contain Cu, Zn, Pb, Ag, Au, As, Fe and trace REEs simultaneously.
Side-by-side comparison against cyanide leaching and pyrometallurgical smelting — the two extractive techniques PCE replaces. All figures sourced from internal Geoenergy Solutions process documentation and the 2013 KGHM industrial pilot.
| Metric | Cyanide / Pyromet (baseline) | PCE |
|---|---|---|
| Cyanide use | Required (lethal at <100 mg/L) | Fully eliminated |
| Operating temperature | 1,000–1,200 °C (Au/Ag smelt); 800–1,200 °C (REE smelt) | 25–300 °C, atmospheric |
| Au yield (refractory / invisible gold, 0.1–10 g/t) | 10–45% (cyanide); 65% (Carlin-type) | 88–94% recovery |
| REE yield (0.01–1 g/L leachate) | Limited — ion-exchange or SX | 85%, 98%+ purity (Nd, Dy) |
| Au output purity | Bullion (refining required) | 99.9–99.99% (ASTM B562 Grade 1) |
| Output value | Bullion ~$80/g | Nanopowder up to $2,000/kg (25× premium) |
| Energy consumption | Baseline (pyromet) | 50% reduction |
| Reagent cost vs. SX-EW | Baseline | 20–30% reduction |
| Water consumption | High; tailings dam required | >80% closed-loop recycle |
| Tailings landfill | Baseline (legacy liability) | 90% reduction; up to 70% returned as backfill (with EDMSU) |
| GHG emissions | Baseline | Up to 50% reduction |
| Current efficiency | >95% (KGHM existing) | >98% (KGHM PCE pilot) |
| Pilot CapEx | $50M+ (greenfield) | $2.5M–$5M (modular retrofit) |
| Full-scale CapEx | $180M–$280M (fixed plant) | $25M–$50M (modular) |
| Breakeven | 3–7 years | 6–18 months |
PCE is most powerful when paired with its sibling technology — the Electrodynamic & Magnetic Separation Unit (EDMSU). Together they form the Total Integrated Recovery System (TIRS): a two-stage, water-free, cyanide-free closed-loop recovery flow.
Stage 1 — EDMSU (dry electrodynamic separation). Twin counter-rotating rotors with alternating-polarity permanent magnets spin at up to 3,000 rpm inside dielectric drums, inducing electromotive force in conductive particles. Conductive grains (gold, copper, PGMs) separate from inert waste rock without water — 99.0–99.2% recovery on 50–100 µm particles. 70%+ of tailings return immediately to the mined-out space as backfill.
Stage 2 — PCE (precision secondary recovery). EDMSU's discharge stream is routed through PCE pulse-electrolysis to scavenge the ultra-fine sub-50 µm "refractory" gold that mechanical separation cannot catch. Final system recovery: 99.9%+. The same PCE circuit upgrades the metallurgical output to nanopowders.
The system operates with 100% efficiency in both extreme heat (deserts) and extreme cold (permafrost), where traditional wet-chemical plants would freeze or fail from water scarcity.
The controlled-potential electrolysis principle has been independently verified at industrial scale by two state-level mining counterparties — KGHM Polska Miedź (Poland) and ENAMI (Chile). Both are publicly-disclosed institutional references.
2013 · Industrial pilot
Agreement HML-BO-88/2013 signed 2 July 2013 between KGHM Polska Miedź S.A. (#8 global copper producer, #2 refined silver) and Nanometallurgy SA. Two industrial electrolytic tanks ran in parallel at the Legnica copper electrorefining smelter — one fitted with controlled-potential technology, one control tank using KGHM's existing galvanostatic method.
Result (1 October 2013): >20% increase in cathode mass at Cu-CATH-1 (LME high-grade copper) quality, verified by chemical analysis. KGHM commission accepted results. Modeled scaling: 110,000 t/y baseline → 200,000 t/y (optimal current density, same energy) → 300,000 t/y (maximum current density).
2020 · Pilot metallurgical test
Empresa Nacional de Minería (Chilean state mining enterprise, est. 1960). Progress meeting 11 March 2020 at Paipote with Patricio Andrade (ENAMI Strategic Development Manager) and Zoltan von Bernath (Nuevas Tecnologías SpA General Manager).
Result: Pilot metallurgical tests on the Matta Plant refining solution successfully extracted Cu, As, Cd, Co, and Zn. Outcomes allowed ENAMI to redefine its commercial strategy — processing and paying for minerals beyond copper from small-scale mining suppliers. ENAMI moved toward negotiating an industrial-scale plant implementation. Letter of satisfaction issued 20 March 2020.
KGHM ranked #8 globally in electrolytic copper production (711,000 t in 2023) and #2 in refined silver. Their commission's formal acceptance of the >20% cathode-mass uplift at Cu-CATH-1 quality — published in agreement HML-BO-88/2013 — is the industrial proof point that controlled-potential electrolysis works at production scale. PCE is the same electrochemical control logic, adapted and patented for gold, silver, PGMs, and rare-earth elements.
PCE is electrochemistry-agnostic. By tuning electrode potential and electrolyte chemistry, the same cell can recover precious, rare-earth, refractory, base, and impurity metals from complex mixed-feed streams.
Gold (Au) · Silver (Ag) — 99.9–99.99% purity, ASTM B562 Grade 1. Yields 88–94% from refractory Carlin-type ore (vs. cyanide 45–65%).
Pt · Pd · Rh · Ru · Ir · Os — recovered as part of multi-metal placer flowsheets (e.g., Nevada Newcastle). Modular hybrid configuration delivers +5–10% PGM recovery vs. conventional.
Neodymium (Nd) · Dysprosium (Dy) · Cerium (Ce) — 98%+ purity from dilute leachates (0.01–1 g/L). Validated in aqueous, molten-salt, and ionic-liquid matrices.
Tantalum (Ta) · Niobium (Nb) — PCE combined with molten-salt electrolysis enables selective deposition. Critical for defense, electronics, and semiconductor supply chains.
Copper (Cu) · Nickel (Ni) · Cobalt (Co) · Lead (Pb) · Zinc (Zn) — industrially validated; selective recovery from complex bleed electrolytes.
Arsenic (As) · Antimony (Sb) · Thorium (Th) · Cadmium (Cd) — selectively electrowon from solution, supporting EPA Superfund-class wastewater remediation.
Metals that cannot be directly electrodeposited at the cathode — such as Aluminum (Al) and Molybdenum (Mo) — are precipitated as oxides or salts via electrocoagulation, then treated through molten-salt electrolysis to obtain pure metal. This extends the recoverable element list well beyond a conventional electrowinning circuit.
The electrolytic refining stage is sized against a daily target of 12.5 kg of 99.99% gold output. The math, run from the internal Bober Khan Wealth capacity analysis, illustrates how modular and capital-efficient the PCE refining stack actually is.
| Parameter | Value | Operational implication |
|---|---|---|
| Target daily gold output | 12.5 kg / day (99.99% Au) | Mid-tier producer scale |
| Concentrate grade fed to electrolysis | 8% Au | Standard PCE inlet specification |
| Daily concentrate requirement | 156.25 kg / day | One single PCE vat handles the full duty |
| Vat capacity | 800 kg / vat | One vat |
| Cycle time | 1 hour | Vat operates ~1 hour/day at this target |
| Daily vat utilization | ~19.5% | Massive headroom for ramp / maintenance |
| Maximum theoretical output | 1,536 kg / day (24 cycles) | 122× the current target — no second vat needed below 50–60 kg/day |
Assuming 90% overall ore→concentrate→gold recovery, the daily mining tonnage to feed 12.5 kg/day of finished gold scales sharply with deposit head grade.
| Scenario | Head grade | Daily ore mined | Best operational fit |
|---|---|---|---|
| A — Low grade | 0.2 g/t Au | 69,450 t / day | Open-pit bulk; high-throughput crushing |
| B — Medium grade | 2.0 g/t Au | 6,945 t / day | Small-to-medium operation; compact footprint |
| C — High grade | 5.0 g/t Au | 2,778 t / day | Underground / selective; lowest mining cost per gram |
PCE's short-pulse waveform doesn't only deposit metal — it controls the size and shape of the deposited grain. By tuning pulse frequency, duty cycle, and amplitude, the cell produces 10–60 nm metallic nanopowder directly, bypassing the entire post-refining nanofabrication step that conventional producers face.
Nanoparticles in this size range carry the surface-area-to-volume properties that high-tech buyers pay for — catalysts (PGM, hydrogen, automotive), electronics (Ag conductive inks, Au contacts), biomedical (Au diagnostic and imaging), defense (Nd/Dy magnets, Ta/Nb superalloys). Market pricing reflects that — gold nanopowder fetches up to 25× the bullion equivalent.
The Catamarca and Nevada deployment models size both bullion and nanopowder revenue streams, materially lifting NPV and AISC profiles versus a bullion-only configuration.
Newcastle Claim (Lincoln County, Nevada · 140,000 oz/y AuEq target) benchmarked against every commercially-available modular metallurgical solution. Hybrid Modular front-end + PCE refining wins on capex, deployment time, and multi-metal recovery — the only architecture suited to the $317B in-situ PGM value the Newcastle ore body carries.
| Technology | CapEx (140k oz/y) | Deploy time | Au+PGM recovery | AISC reduction |
|---|---|---|---|---|
| Traditional fixed plant | $180M – $280M | 24 – 36 months | 88 – 94% | Baseline |
| Gekko / Sepro / APT Modular | $55M – $95M | 6 – 12 months | 85 – 93% | −15 to −25% |
| KCA Modular Heap Leach + ADR | $45M – $75M | 4 – 9 months | 70 – 85% | −20 to −30% |
| Modular SX-EW / Electrowinning | $65M – $110M | 8 – 14 months | 85 – 92% | −10 to −20% |
| Hybrid Modular Front-End + PCE | $62M – $78M | 7 – 11 months | 90 – 96%+ | −25 to −35% |
Source: 2024–2026 real-world deployments (Gekko Python, Sepro, APT, KCA, Metso SX-EW) and PCE pilot benchmarks; risk-adjusted for Nevada projects.
The PCE refining module alone can bolt onto any existing modular front-end. Add-on CapEx $9M–$13M; deployment 2–4 months; +5 to +10% PGM recovery uplift versus conventional electrowinning; 20–30% lower energy and footprint.
The proposed Newcastle PCE pilot ($5M budget, 3-month timeline) benchmarked against recent comparable hydrometallurgical, electrometallurgical, and battery-recycling pilots — Defense Metals, Green Critical Minerals, and modular SX-EW programs.
| Pilot category | Typical cost | Typical timeline | Avg. valuation uplift |
|---|---|---|---|
| REE Hydrometallurgical | $3M – $5.5M | 3 – 4 months | 3× – 6× |
| Copper / Multi-metal Electromet | $3.5M – $6.5M | 3 – 6 months | 2.5× – 5× |
| Battery recycling / plasma | $4M – $7M | 4 – 6 months | 4× – 8× |
| Modular SX-EW / electrorefining | $2.5M – $5M | 2 – 4 months | 2× – 4× |
| Newcastle PCE Pilot | $5M | 3 months | 3.5× – 5.5× |
Combined with the $1.5M drilling + S-K 1300 technical work, the $6.5M full de-risking program targets a 7.5×–11× total valuation uplift — proving 90%+ recovery on a $317.5B gross in-situ PGM asset, on the back of the KGHM + ENAMI prior validations.
Conventional electrowinning fixes the cell current and lets cathode potential drift — accepting whatever ions reduce. PCE inverts that. The cathode potential is held precisely at the reduction potential of the target metal (Au, Ag, PGM, REE) via short anodic pulses, deposting only that target metal and rejecting matrix ions.
The cathode potential is held within millivolts of Au⁺'s reduction potential (≈ +1.5 V vs. SHE). Above that potential, only Au⁺ accepts electrons; Cu²⁺, Pb²⁺, Zn²⁺, As³⁺ remain in solution. The result is direct production of 99.9% pure gold from a complex polymetallic feed, without solvent extraction or ion exchange.
Short anodic pulses partially re-dissolve the deposited layer, controlling nucleation and grain growth. By tuning pulse frequency (kHz), duty cycle, and amplitude, the cell directly produces 10–60 nm nanoparticles, valued at $50–$2,000/kg vs. ~$80/g bullion — the same metal at up to 25× the price.
Operating at 25–300 °C atmospheric, PCE bypasses pyrometallurgical smelting (1,000 °C+) entirely. Energy consumption drops 50%; greenhouse-gas emissions drop ~50%; the cell can run in any climate from arid desert to Arctic permafrost where wet-chemistry plants freeze or fail.
PCE is not a marginal upgrade. At Newcastle (Nevada), it transforms an exploration SPV worth $110–175M into a multi-billion-dollar producer within three years. At Farallón Negro (Argentina), it converts a 4.0 Mt tailings liability into a $52M+ annual EBITDA stream. All numbers below are sourced from internal Bober Khan Wealth / Geoenergy Solutions deployment models.
Case Study · Nevada
A 12.5 kg/day (≈ 140,700 oz/yr) AuEq PCE production facility scaling at +30% annually. PCE delivers top-quartile capital efficiency: $410–$555 CapEx per annual AuEq oz vs. industry average $1,200+.
From post-de-risking SPV ($110–$175M) → cash-flowing mid-tier producer ($3.7–$5.6B base case by 2029). That is a 13–32× overall multiplication within three years — the single biggest valuation catalyst in the BKGT portfolio.
CapEx footprint dramatically lower than the original 2020 NI 43-101 conventional plant ($192M for 2,000 tpd). The modular PCE route reaches the same scale at $106M cumulative through end-2029 — a 65% capital saving.
| Year | Daily AuEq | Annual oz | Revenue | EBITDA | Valuation |
|---|---|---|---|---|---|
| 2027 | 12.5 kg | 140,700 | $492M | $276M | $2.2 – $3.3B |
| 2028 | 16.25 kg | 182,900 | $640M | $359M | $2.9 – $4.3B |
| 2029 | 21.125 kg | 237,800 | $832M | $466M | $3.7 – $5.6B |
Case Study · Argentina
Catamarca's existing operating mine produces an 8% Au-Ag semi-product through legacy cyanidation. PCE retrofits seamlessly into the existing electrowinning circuit — only rectifiers and controlled-potential software swap required, no new electrolyzer construction.
The strategic prize: 4.0 million tons of historical tailings sitting on-site, dismissed as waste under cyanide economics but rich in "invisible" gold locked in pyrite. PCE recovers it. Conservative model: +$52.3M annual EBITDA from tailings reprocessing alone, on top of primary production.
Additional driver: the March 2024 Catamarca court injunction mandates EGIA (Integrated Cumulative Impact Study) and effectively bans new cyanide permits in the Los Patos River basin. PCE is the qualifying compliance pathway — no cyanide, >80% closed-loop water in an arid Puna region.
Newcastle 140k oz/yr facility — original 2020 NI 43-101 conventional gravity/flotation/cyanidation plan vs. the modular PCE route. PCE delivers the same throughput at 35–65% lower capital intensity, with 3–6 month deployment vs. 24–36 months.
3 months · full demo plant on Newcastle ore + metallurgical report
9–12 months · 12.5 kg/day = 140,700 oz/yr full modular plant
Full ramp through 21.125 kg/day = 237,800 oz/yr by 2029
At $3,500/oz AuEq with AISC $1,400/oz — top-quartile efficiency
A scaled-up Newcastle PCE plant producing 25 kg Au + 50 kg Ag + 25 kg Pt per day (365 days/year). At base spot prices the operation generates $1.10B/yr revenue. If 100% of output is nanopowder-grade, that figure scales to $27.6B/yr in theoretical maximum — the 25× nanopowder premium applied to an industrial-scale asset.
| Output mode | Annual production | Base revenue | 2× premium | 10× premium | 25× premium (max) |
|---|---|---|---|---|---|
| Au (25 kg/day) | 9,125 kg/yr | $792M | $1.58B | $7.92B | $19.8B |
| Ag (50 kg/day) | 18,250 kg/yr | $19M | $38M | $190M | $470M |
| Pt (25 kg/day) | 9,125 kg/yr | $293M | $587M | $2.93B | $7.34B |
| Total | — | $1.10B | $2.21B | $11.05B | $27.62B |
Source: Bober Khan Wealth internal analysis 25 Oct 2025. Spot prices: Au $86,800/kg, Ag $1,030/kg, Pt $32,150/kg. Premiums depend on end-market: catalysts, electronics, biomedical, defense.
Updated 2025 valuations identify a massive inferred mineral resource on the 80-acre claim in Lincoln County, Nevada (38.15° N, 114.75° W). 10 million tons of placer gravel ore hosted at a conservative 50 ft depth. Platinum group metals — Iridium and Rhodium — dominate the value stack. Gold and silver are the underwriting floor; PGMs are the upside.
The four-phase Bober Khan Wealth Holdings deployment path. $75M total investment across four phases creates a multi-billion-dollar cash engine in under 48 months. Total ROI: 15× – 24× multiplier.
PCE recovers across the full metal spectrum — from monetary-reserve precious metals through critical rare-earths to refractory strategic metals. Each tier targets a different end market with distinct purity grades and pricing premiums.
The 25× nanopowder premium is not theoretical — it is paid by specific end markets that cannot accept bullion-grade gold. Each market is supply-constrained and growing.
Saudi Arabia's Vision 2030 framework allocates $5.6B for mining-sector transformation, with a $75B total mining opportunity through 2030. PCE is positioned as the flagship ESG-compliant gold-recovery technology — presented to Ma'aden in February 2026.
Head-to-head, every operating dimension. The Mining 2.0 stack — PCE + EDMSU + closed-loop water — delivers higher recovery, lower cost, faster permitting, and a path to nanopowder margins that the cyanide route structurally cannot reach.
XTOMORROW's mining concession portfolio is engineered to deploy PCE/EDMSU/TIRS in modular increments. Each site has its own characterization, sample profile, and ESG positioning — but all share the same underlying recovery technology.
Nevada · USA
Multi-metal placer (Au + Ag + PGM) on the Carlin Trend. $317.5B gross in-situ value at Dec 2025 spot. Targets 140,000 oz AuEq / yr at AISC ~$500/oz. PCE retrofit bolted onto a Hybrid Modular front-end.
Catamarca · Argentina
60-year sovereign PPP concession. 4.0 Mt of historical tailings reprocessed as a "second EBITDA engine." PCE retrofit qualifies operations to resume under the March 2024 Catamarca court injunction (cyanide elimination, EGIA compliance).
Carlin Trend · Nevada
Process gold-mine tailings to recover Au, Ag, and trace REEs from legacy stockpiles. Addresses environmental concerns at one of the world's largest gold producing complexes.
Alaska · USA
Treat wastewater and tailings for Au/Ag recovery, reducing ecological impact. PCE's closed-loop water recycle is particularly valuable in cold-climate operations where wet plants struggle.
Colorado · USA
Remediate legacy tailings for Au/Ag while mitigating acid mine drainage. Aligns with U.S. EPA Superfund initiative pathways.
California · USA
Recover REEs from tailings and wastewater. Critical for U.S. domestic REE supply chain. PCE's molten-salt and ionic-liquid capability uniquely targets the Mountain Pass radioactive thorium by-product challenge.
PCE qualifies XTOMORROW's mining program against the increasingly stringent global regulatory perimeter — and in several jurisdictions, is the only available pathway to resume permitted operations.
PCE is the core electrochemical technology of Geoenergy Solutions — a wholly-owned subsidiary of Bober Khan Wealth Holdings (Singapore-headquartered). The patent envelope originates with Nanometallurgy SA (party to the 2013 KGHM agreement HML-BO-88/2013), with continuous development carrying through to the current PDCE (Pulse/Potential Dynamic Controlled Electrolysis) iteration.
PCE technology is exclusively licensed into XTOMORROW's mining-asset portfolio. The licensing chain is structured under Singapore law with cross-border tax efficiency for both conventional and Sharia-compliant tranches.
Institutional investors and strategic partners can request the complete PCE technical package — including the 2013 KGHM industrial pilot report, 2020 ENAMI Paipote test results, full process flowsheets, capacity sizing, capex/opex models, and the Newcastle / Farallón Negro / Saudi deployment proposals — through the secure data room.
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