Overview
ARBOK-SA produces commercial sulfuric acid (H₂SO₄) from phosphate-industry waste — solid phosphogypsum and acidic process waters — without furnaces. The historical gypsum-to-acid route (Müller-Kühne) died because it needed 1,100–1,400 °C and roughly 7.45 GJ per ton of throughput; ARBOK-SA replaces the furnace with acid-medium dissolution and deep-vacuum phase separation carried out at ambient temperature, at a small fraction of that energy cost. Outputs: sulfuric acid alongside a portfolio of other commercial-grade acids, calcium-based construction materials, and clean water; radionuclides are removed and immobilized in a dedicated compact fraction (ARBOK-NUKE). Turns the 1.5 billion t of US phosphogypsum ("gypstacks") into a domestic sulfur/acid reserve equivalent to up to 855 million t H₂SO₄.
Applications
Primary use cases: sulfuric-acid production from legacy phosphogypsum stacks and fresh phosphogypsum; treatment of acidic phosphate-plant effluents/brines (scrubber waters, pond waters); full stack remediation with land recovery.
Outputs/uses: H₂SO₄ (fertilizer, metallurgy/leaching, chemistry), plus a slate of other commercial-grade acids serving specialty-chemical and fluorosilicate feedstock markets, calcium sulfate/calcium products for construction, reuse-grade water; optional dry P₂O₅ as an additional process step.
Industries and users: phosphate/fertilizer producers, state remediation programs, chemical traders, copper/nickel/lithium processors.
Scale: containerized modules; linear scale-up by number of units.
Operating Principle
Two coupled stages:
(1) Dissolution — ground solid phosphogypsum (CaSO₄·2H₂O, poorly water-soluble) is fully dissolved in a proprietary engineered acid medium in corrosion-engineered Arbok reactors, at up to roughly 200 t/day per module.
(2) Separation — the resulting stream (and/or native acidic plant brines) is separated by Arbok cold boiling under deep vacuum at ambient temperature into fractions by volatility/density: acids, water, solids. No furnaces, catalysts, membranes, or consumable reagents.
Radionuclides (Ra-226 etc.) are extracted in ARBOK-NUKE mode into a small, compact immobilized salt mass for standard disposal; the substantial majority of the feed mass leaves as usable products.
Limitations: highly corrosive process media require dedicated industrial design using specialized corrosion-resistant linings and alloys; precise per-section process control is needed to avoid unwanted side-reaction acids; per-site feed variability.
Key Parameters
Process: deep vacuum, ambient temperature; energy consumption is a small fraction of the roughly 7.45 GJ/t required by the historical Müller-Kühne furnace route.
Measured separation performance on real phosphate-plant brine (portable unit) shows the majority of the liquid stream recovered as clean, reuse-grade water, with the remainder split across a portfolio of commercial-quality acids and a small solid residue fraction.
Each ton of processed phosphogypsum yields a substantial share of its own mass back as sulfuric acid, a ratio set by the sulfur content of the ore rather than by any unit-specific claim.
Dissolution throughput: up to roughly 200 t/day per reactor module. Unit format: 200 t/day containerized; CAPEX $10–20 M per unit; OPEX ~$0.3 M/year.
Options: dry P₂O₅ output instead of liquid H₃PO4 as an additional processing step, at extra cost; water-only mode (full neutralization) as a fallback configuration.
Architecture and Components
Feed grinding and preparation; a corrosion-resistant acid-medium dissolution reactor; a deep-vacuum separation unit built from synchronized vacuum-pumping stages; a set of dedicated product-collection vessels for the separated acid and water fractions, engineered to prevent cross-contamination and re-evaporation losses; a corrosion-resistant condensation and heat-exchange loop; the ARBOK-NUKE radionuclide extraction and immobilization module; independent in-line quality-control laboratories monitoring each process section in real time and linked to a central QC center; standard safety systems including leak sensors, ventilation, and emergency neutralizers. Containerized, modular design.
Advantages
Technical: removes the furnace — the exact reason gypsum-acid died economically in 1976; ambient-temperature physics; multi-acid portfolio from one stream; hydrofluoric-acid co-product worth several times more per ton than H₂SO₄.
Economic: feedstock is negative-value waste located next to the largest acid consumers (phosphate plants = ~60 % of world H₂SO₄ demand) — near-zero logistics; converts stack maintenance/penalty/accident budgets ($280–300 M/year for a large site) into project economics.
Environmental: eliminates gypstacks, dust, radon; stops nutrient-laden runoff feeding sargassum blooms; recovers the large majority of liquid mass as reuse water.
Strategic: up to 855 M t H₂SO₄ locked in US stacks (≈ 32 years of US consumption; $128 B at $150/t, $340 B+ at 2026 crisis prices); decouples acid supply from oil/gas byproduct sulfur and Gulf logistics (2026: Tampa sulfur $705/lt record); annual fresh phosphogypsum (~30 M t) alone ≈ up to 17 M t acid/year.
Integrations
ARBOK-PHOSPHOGYPSUM (density separation / gypsum purification track); ARBOK-Phosphate (liquid-effluent balance and BOT economics); ARBOK-SULPHUR (sulfur/H₂SO₄ from petroleum waste — combined national acid program); ARBOK-FERTILIZER / PhosVita (acid concentrate + organics → fertilizer); Arbok-FluoSpar (consumes H₂SO₄ — internal offtake synergy); ARBOK-GUDRON (acid recovery from acid tars).
Deployment & Operation
Steps: stack/effluent assay → per-site industrial design (corrosion class, radionuclide level) → module delivery and installation at the stack or plant gate → commissioning. Continuous, automated, real-time QC; BOT/BOOM commercial models (products belong to Arbok until transfer; client pays via offtake/service).
National program reference case: ~53 M t phosphogypsum/year (annual new + legacy drawdown) → ~30 M t H₂SO₄/year (> current total US output) → $4.5 B/year at $150/t, ~$12 B/year at 2026 prices; 1.5 B t consumed in ~30 years.
TRL
TRL [to be confirmed by Michael]. Component base: separation validated on real phosphate-plant brine (portable unit, acids at commercial quality); dissolution process validated in earlier development work; ARBOK-NUKE mode available. Industrial redesign for corrosive service (specialized corrosion-resistant materials and section-by-section process control) defined and required for serial units.
Market Potential
World H₂SO₄: ~260 M t/year, ~60 % to phosphate fertilizers; >90 % of sulfur is oil/gas byproduct — supply structurally hostage to hydrocarbons (UCL 2022: demand ~400 M t by 2040, deficit 100–320 M t/year). 2026 Hormuz crisis: sulfur ×15 ($705/lt Tampa record), acid $400/t US Gulf, $800+/t Asia, China export halt, ~17 % of world copper output at risk (Goldman Sachs). US phosphogypsum: 1.5 B t accumulated (~1 B t in 25 Florida stacks), +30 M t/year. Bonus in the same stacks: 70–85 % of ore REE report to phosphogypsum.
Typical Project Economics
Feedstock cost: negative (client currently pays $280–300 M/year per large site for stack upkeep, penalties, accidents; Florida closure liabilities estimated in tens of $B). Unit: 200 t/day, CAPEX $10–20 M, OPEX ~$0.3 M/year, energy cost well below the furnace-route baseline. Revenue stack: H₂SO₄ (conservative $150/t; 2026 crisis $400+/t) + HF (multiple of acid price) + H₃PO₄/P₂O₅ + calcium products + water + healthcare/land externalities (up to $500 M/year healthcare savings, Florida; billions in freed land). Payback per ARBOK-Phosphate BOT reference: dominated by eliminated liabilities, effectively immediate at site level.
Risk Factors
H₂SO₄/sulfur price cyclicality (2022: $481→$90/lt in 2 quarters) — base economics on $100–200/t, crisis as upside; HF handling/safety and corrosion engineering; EPA/NESHAP Subpart R permitting and litigation environment around any phosphogypsum use (mitigant: radionuclide removal, not redistribution); offtake for multi-acid portfolio; per-site feed variability; conservative industry adoption.
Related Technologies
ARBOK-PHOSPHOGYPSUM · ARBOK-Phosphate · ARBOK-SULPHUR · ARBOK-FERTILIZER · Arbok-FluoSpar · ARBOK-GUDRON
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