Efficient technologies for H₂S removal, odor control, optimization of biogas production and natural pigments.
Discover our iron oxide and hydroxide products for applications in pigments, biogas and odor control segments.
Iron-OX® Yellow
Natural iron hydroxide with yellow coloration.
Non-toxic product.
Iron content (Fe): 54% < Fe < 60% (w/w)
Expressed as Fe2O3: 77% < Fe2O3 < 86%
Color Index: Pigment Yellow 43 (PY-43)
Particle size:
MESH 100 (149 μm) – retention index < 6% (w/w)
MESH 250 (63 μm) – retention index < 2% (w/w)
MESH 325 (44 μm) – retention index < 1% (w/w)
Iron-OX® Red
Natural iron oxide with red coloration.
Non-toxic product.
Iron content (Fe): 60% < Fe < 64% (w/w)
Expressed as Fe2O3: 86% < Fe2O3 < 92%
Color Index: Pigment Red 102 (PR-102)
Particle size:
MESH 100 (149 μm) – retention index < 6% (w/w)
MESH 250 (63 μm) – retention index < 2% (w/w)
MESH 325 (44 μm) – retention index < 1% (w/w)
Environ-OX®
Product composed of a mixture of natural iron oxides/hydroxides and chemical additives. Non-toxic.
Density: 1.3 ± 0.2 g/cm³
Iron content: ≥ 42%
pH: 11 – 12
Gas humidity: ≥ 40%
Particle size:
2.00 – 3.35 mm
3.35 – 4.00 mm
Óxido de Ferro Rio Acima
DISCOVER THE IDEAL PRODUCT FOR YOUR BUSINESS!
Products available in red and yellow, supplied in powder and granular form, in 1,000 kg and 1,250 kg big bags and 25 kg bags.
H₂S Removal
Solutions for H₂S removal in biogas and biomethane plants, increasing CH₄ production, protecting equipment and improving energy efficiency.
Our products act in both the liquid phase of biodigesters and in biogas, ensuring efficient H₂S removal and contributing to renewable energy generation.
Pigments
Iron oxides and hydroxides processed under strict quality control, suitable for a wide range of industrial applications.
Benefits: Non-toxic product, high tinting strength, weather resistance, excellent dispersibility, high covering power, thermal stability and cost-effectiveness.
Oil & Gas
100% natural product used in the formulation of high-density fluids for oil and gas extraction.
Benefits: Non-toxic, safe handling and physical properties that enhance drilling fluid performance.
History of
Óxido de Ferro Rio Acima
We began our activities in 1947. With the knowledge and experience acquired over the years, aligned with market demands, we continuously evolve by developing people and improving and innovating processes and products.
We are leaders in the national market for 100% natural iron oxide and hydroxide pigments.
Commitment to the
Environment
We are an environmentally licensed company committed to sustainability.
No industrial liquid effluents are discharged into rivers or streams.
Natural drying systems are used to reduce energy consumption, fossil fuels and CO₂ emissions.