ARBOK-Molybdenum (metal case) — molybdenum from copper effluent

Overview

Molybdenum has almost no ore of its own: more than 60 % of the world's molybdenum is a by-product of porphyry copper mines (Chile, Peru, Mexico, USA). Part of that molybdenum is never captured — it leaves the circuit as the molybdate ion (MoO₄²⁻) in mine waters, leach solutions and tailings. Since 2025 China has imposed export controls on molybdenum, alongside tungsten, bismuth, indium and tellurium, so buying it now means licenses, delays and refusals. Demand is rising, from reactor steels to catalysts, yet nobody builds a dedicated molybdenum mine — it always arrives "as a bonus" to copper. ARBOK recovers molybdenum not from ore but from the copper effluent that has to be treated anyway, turning water treatment into metal recovery. Molybdenum and rhenium come out of a single water stream.

> Core technology and architecture: see ARBOK-VC (Vacuum Cracking). This entry covers the molybdenum-specific feedstock, market, and economics.

Applications

Primary use cases: molybdenum recovery from copper mine waters, leach solutions and tailings of porphyry copper operations.

Outputs/uses: molybdenum for heat-resistant and stainless steels, armor, pipelines and hydrotreating catalysts — no substitute exists; rhenium as co-product; arsenic and uranium removed into an immobilized fraction (uranium a potential product given a license and sufficient concentration); clean water returned to circulation.

Industries and users: copper-molybdenum mining (Chile, Peru, USA, Mongolia), defense and aerospace (armor, superalloys, rhenium), oil refining (hydrotreating catalysts).

Scale: modular units of 200 m³/day of effluent, deployed on existing water circuits of copper-molybdenum mines that pump millions of m³ per year.

Operating Principle

The effluent is processed under deep vacuum; the technology operates at ambient temperature — no heat is supplied. The molybdate ion (and perrhenate) is concentrated out of the stream, then finished by ion exchange to product. Arsenic and uranium are removed simultaneously and report to an immobilized fraction. There are no furnaces, membranes, chemicals or consumables, and substantially all of the water is returned by volume, with no liquid tail. The process works only where the water already exists and has to be treated anyway — it opens no new pit and runs no separate ore processing, so molybdenum recovery is bounded by the water flows of existing copper operations rather than by ore reserves.

Limitation carried from the source: the recovery figure used for scale-up is a conservative assumption for illustrative purposes, not a demonstrated whole-stream yield.

Key Parameters

| Parameter | Value |

|---|---|

| Vacuum | deep vacuum |

| Process temperature | Ambient temperature; no heat supplied |

| Water return | near-complete water return, no liquid tail |

| Module capacity | 200 m³/day of effluent ≈ 70,000 m³/year |

| Reference feed grade | 0.2 g/L Mo |

| Molybdenum output per module | ~14 t/year |

| Co-recovered metals | Rhenium (perrhenate); arsenic and uranium removed to an immobilized fraction |

| Finishing stage | Ion exchange |

| Consumables | None — no furnaces, membranes, chemicals or consumables |

| Energy consumption | very low specific energy consumption, consistent with the platform's deep-vacuum route |

| Container format / service life | modular containerized unit; long service life, since the vacuum process runs without corrosion |

Architecture and Components

Vacuum separation train of the platform operating under deep vacuum, concentrating molybdate and perrhenate from the water stream, followed by an ion-exchange finishing stage that delivers the marketable molybdenum (and rhenium) product. Arsenic and uranium are routed into a separate immobilized fraction. Modular units sized at 200 m³/day; a large copper-molybdenum mine hosts many modules on its existing water circuit. Detailed component list of the base train: see the platform entry. Container class and equipment layout for the molybdenum configuration follow the same modular platform pattern used across ARBOK's metal-recovery applications, sized to the effluent volume at each site.

Advantages

Technical: recovers molybdenum from dilute effluent without furnaces, membranes, chemicals or consumables; molybdenum and rhenium come out of a single water stream; arsenic and uranium are removed in the same pass instead of being managed separately; ambient-temperature operation.

Economic: no new pit and no separate ore processing — the water is already there and already has to be treated, so recovery rides on an existing obligation; module revenue is stacked from metal, co-product rhenium and returned water, plus avoided fines and hazardous-sludge disposal.

Environmental: near-complete water return by volume, no liquid tail; arsenic and uranium immobilized rather than discharged; treatment becomes recovery.

Strategic: every ton produced outside China bypasses the export quota regime imposed in 2025; molybdenum has no substitute in its main applications.

Integrations

Shares the water stream and the vacuum-separation platform with ARBOK-Rhenium — the source states this is the same process that already pulls rhenium from copper-molybdenum waters, and both metals are produced from one feed. Co-sites with copper-effluent treatment covered by ARBOK-Copper-Waters. Platform: ARBOK-VC (Vacuum Cracking).

Deployment & Operation

Deployed on the existing water circuit of a copper or copper-molybdenum operation — mine waters, leach solutions, tailings — where treatment is already mandatory. One module handles 200 m³/day; a large copper-molybdenum mine pumping millions of m³ per year is covered by multiplying modules on the same site. No new pit, no separate ore processing line, no consumables supply chain. Commissioning, staffing and maintenance for the molybdenum configuration follow the standard platform pattern: automated operation, minimal on-site crew, and a maintenance regime built around the absence of consumables, membranes and moving reagent systems.

TRL

TRL 8 — the molybdenum recovery route uses the same vacuum-separation process already validated for rhenium recovery from copper-molybdenum waters (see ARBOK-Rhenium and ARBOK-VC (Vacuum Cracking) for platform status).

Market Potential

Molybdenum price: ~$40/kg (China, 2026), market in deficit. More than 60 % of output is co-produced with copper; a standalone mine barely exists. China controls ~40 % of global processing and has held molybdenum under export controls since 2025. At industry scale, the copper industry moves ~5 billion m³ of water per year; even a conservative recovery assumption from that water yields on the order of 18,000 t and ~$0.7B/year. Target geographies: the copper-molybdenum belts of Chile, Peru, USA and Mongolia. Demand drivers: reactor and heat-resistant steels, armor and superalloys, hydrotreating catalysts — with no substitute.

Typical Project Economics

• ~14 t molybdenum/year → ~$0.56M/year (at $40/kg)
• rhenium as a co-product: ~$0.01–0.02M/year
• arsenic and uranium removed into an immobilized fraction; savings on fines and hazardous-sludge disposal ~$30–50K/year (a preliminary estimate, to be confirmed on a site-specific basis). Uranium is a potential product given a license and sufficient concentration
• 70,000 m³ of clean water back into circulation ≈ ~$0.07M/year

TOTAL per unit: ~$0.70M/year. A large copper-molybdenum mine pumps millions of m³ of water per year — thousands of tons of molybdenum and tens of $M/year from one site. Industry-wide: ~+$700M/year. CAPEX per module and payback period follow the platform's typical range for comparable copper-effluent recovery modules; site-specific figures depend on effluent volume and local installation costs.

Risk Factors

Export-control environment: China controls ~40 % of global processing and licenses, delays and refusals are already the norm — the same regime that makes the case also shapes the price the project is modelled against.

Feed dependency: molybdenum recovery is tied to the water flows of existing copper operations, so volumes follow copper production rather than molybdenum demand; feed grade at 0.2 g/L is a reference value and site grades vary.

Scale-up assumption: the ~18,000 t / ~$0.7B/year industry figure rests on a conservative recovery assumption applied to ~5 billion m³ of copper-industry water, not on demonstrated site output.

Disposal-cost savings: the estimated $30–50K/year saving on fines and hazardous-sludge disposal is a preliminary estimate and should be confirmed against site-specific waste-handling costs before being included in investment cases.

Uranium handling requires a license; without one the uranium fraction is a disposal obligation rather than a product.

Configuration-specific data: energy consumption and CAPEX for the molybdenum configuration have not yet been published separately from the platform baseline, so project-level economics should be validated on a site-specific engineering study before commitment.

Related Technologies

ARBOK-Rhenium · ARBOK-Copper-Waters · ARBOK-VC (Vacuum Cracking) · ARBOK-Indium