IXOS®
Gold Recovery
Advanced gold recovery technology engineered for greater selectivity, efficiency and operational performance.
Four Side Solutions works with Advanced Mineral Separations to introduce IXOS® molecularly imprinted polymer technology to qualified gold mining operations across Africa.
Katoro Tanzania
A Different Approach to Gold Recovery
IXOS® is a patented molecularly imprinted polymer technology designed to selectively capture gold and silver from cyanide leach solutions.
Unlike conventional activated carbon, IXOS® is engineered at the molecular level to target specific metal ions, offering mines an alternative approach to adsorption, elution and downstream gold recovery.
Compare the technology →Why IXOS®
A purpose-engineered adsorption media created to address limitations associated with traditional precious-metal recovery systems.
Selective Recovery
Engineered to selectively adsorb gold and silver while reducing the co-adsorption of many unwanted metals.
Operational Efficiency
Lower-temperature elution and no conventional high-temperature carbon regeneration process.
High-Capacity Media
Designed for high precious-metal loading with the potential to reduce required adsorption media.
Reusable Technology
IXOS® media is designed for repeated adsorption and elution cycles.
Existing Circuits
The technology can be evaluated for integration into cyanide-based precious-metal recovery operations.
African Deployment
Four Side Solutions supports qualification and commercialization opportunities across African mining markets.
Beyond Activated Carbon
Activated carbon has long been used in gold recovery. IXOS® introduces an engineered molecular platform with a different approach to adsorption and elution.
| Attribute | IXOS® | Activated Carbon |
|---|---|---|
| Material | Molecularly imprinted polymer | Activated carbon |
| Selectivity | Engineered molecular recognition | Broad adsorption |
| Metal Loading | High-capacity engineered media | Conventional carbon loading |
| Elution | Lower-temperature process | Higher-temperature conventional process |
| Regeneration | No thermal regeneration | Thermal regeneration commonly required |
| Co-adsorption | Designed to reduce competing species | Susceptible to competing metals |
How IXOS® Works
Leach
Gold is dissolved into solution through the operation's cyanide-based leaching process.
Capture
IXOS® selectively adsorbs precious metals from the pregnant leach solution.
Elution
Captured gold is stripped from the IXOS® media through the designated elution process.
Recovery
Gold-rich eluate proceeds to downstream metal recovery and refining.
From Technology to Mine-Site Operations
Four Side Solutions has supported the introduction and field evaluation of IXOS® technology within Tanzania's gold mining sector.
Testing and deployment have included ore leaching, resin-based recovery applications, fixed-bed adsorption and mine-site processing environments, generating practical operational data for commercial implementation.
The 2025 Tanga pilot provided an early field demonstration of the IXOS® platform under Tanzanian operating conditions and contributed to the development of subsequent commercial deployment work.
Built for Africa's Gold Industry
Four Side Solutions works with mining companies, processing operators, associations, governments and strategic partners to identify commercially suitable IXOS® opportunities.
Is Your Operation a Fit for IXOS®?
IXOS® is not presented as a universal replacement for every recovery circuit. Opportunities are evaluated against technical and commercial criteria.
Advanced Mineral Separations
Advanced Mineral Separations develops molecularly imprinted polymer technologies for the selective capture and separation of valuable materials.
IXOS® applies this advanced material platform to precious-metal recovery. Four Side Solutions works with AMS in developing and supporting qualified opportunities across African markets.
Visit AMS →Have a Gold Project?
If you operate a mine, processing facility, tailings project or gold recovery operation and would like to evaluate IXOS®, speak with Four Side Solutions.
Onboarding Questionnaire →Technical and operational performance is project-specific and depends upon ore characteristics, leach chemistry, process configuration and site conditions. References to IXOS® capabilities are not guarantees of recovery, production or economic performance. Each project should undergo appropriate technical evaluation and qualification.