Nitric Acid Purification System
The Global Antico Nitric Acid Purification System is a specialist distillation and chemical treatment plant designed to upgrade crude or process-grade nitric acid to pharmaceutical, analytical, and electronic chemical purity. Crude HNO₃ typically contains dissolved nitrogen oxides (NOx: NO, NO₂, N₂O₃), dissolved metals from equipment contact, chloride impurities, and residual organic contaminants. The purification process begins with a sparging/denitrification stage, in which purified air or oxygen is bubbled counter-currently through the acid column, stripping dissolved NOx from the liquid phase. The released NOx off-gas is captured in a dedicated alkaline scrubber system for abatement before atmospheric venting.
The acid then undergoes precision distillation in a borosilicate glass or PTFE-lined column under controlled temperature and pressure conditions, separating HNO₃ from water and non-volatile impurities at target concentration (65–70%). A metal polishing stage using ion exchange resin or selective precipitation reduces residual heavy metal concentrations (Fe, Cr, Pb, Ni, Cu) to sub-50 ppb levels required for electronic and pharmaceutical applications. All wetted surfaces are constructed from borosilicate glass, high-purity quartz, PTFE, or SS 316L. The complete plant is equipped with NOx gas detectors, automated emergency ventilation, and pressure relief on all vessels. Output purity is verified by inline UV spectrophotometry and periodic ICP-MS analysis, with full batch release documentation for pharmaceutical GMP compliance.
- Output Concentration Up to 70% HNO₃
- Dissolved NOx <5 ppm dissolved NOx
- Total Metals <50 ppb (Fe, Cr, Ni, Pb, Cu)
- Material Borosilicate Glass / PTFE / SS 316L
- Denitrification Air/O₂ sparging system
- NOx Emission Alkaline scrubber — stack compliant
Key Features
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Sparging/denitrification column for dissolved NOx removal
Sparging/denitrification column for dissolved NOx removal
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Precision distillation in borosilicate glass column
Precision distillation in borosilicate glass column
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Ion exchange polishing for heavy metal reduction to <50 ppb
Ion exchange polishing for heavy metal reduction to <50 ppb
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NOx tail-gas alkaline scrubbing system
NOx tail-gas alkaline scrubbing system
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Corrosion-resistant borosilicate, PTFE, and quartz construction
Corrosion-resistant borosilicate, PTFE, and quartz construction
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Automated pH, NOx, and temperature monitoring
Automated pH, NOx, and temperature monitoring
System Components
Modular assemblies engineered for reliable integration, service access, and scale-up from laboratory to pilot plant operation.
Applications
- Pharmaceutical synthesis — API manufacturing requiring pure HNO₃
- Electronic etching and PCB manufacturing processes
- Specialty chemical synthesis (nitration reactions)
- Metals processing and surface treatment
- Laboratory and analytical reagent grade production
- High-purity nitrate salt synthesis
- Oil & gas processing
- Water treatment
Technical Specifications
| Parameter | Specification |
|---|---|
| Output Concentration | Up to 70% HNO₃ |
| Dissolved NOx | <5 ppm dissolved NOx |
| Total Metals | <50 ppb (Fe, Cr, Ni, Pb, Cu) |
| Material | Borosilicate Glass / PTFE / SS 316L |
| Denitrification | Air/O₂ sparging system |
| NOx Emission | Alkaline scrubber — stack compliant |
| Monitoring | UV spectrophotometry + ICP-MS |
| Documentation | GMP batch release records |
| Performance Guarantee | Performance Guarantee: Output NOx content <5 ppm dissolved and total metals <50 ppb in purified acid. Process guarantee verified by third-party accredited ICP-MS and UV analysis at site acceptance test. |
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FAQ
What capacity range is available for Nitric Acid Purification System?
We offer project-specific sizing from laboratory benchtop scale through pilot and production volumes. Contact our engineers with your batch size and process requirements for a tailored recommendation.
Can this unit be integrated with existing plant automation?
Yes. All systems support standard instrumentation signals and can interface with DCS, PLC, or standalone controllers. Custom I/O and recipe control packages are available.
What material options are available?
Borosilicate glass, glass-lined steel, stainless steel, and specialty alloys including Hastelloy can be specified based on your process chemistry, temperature, and pressure requirements.
Do you provide installation and commissioning?
Global Lindus provides on-site installation supervision, commissioning, operator training, and optional IQ/OQ documentation for regulated industries.
What is the typical delivery lead time?
Standard configurations ship in 4–8 weeks. Custom skid assemblies and large production units may require 12–16 weeks depending on scope and material availability.