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Manufacturers, Exporters, Suppliers of RO Dechlorination Chemicals
RO Dechlorination Chemicals in Iran for Persian Gulf SWRO, Mahshahr Petrochemical & Bandar Abbas Refinery RO (Sodium Bisulfite-Based)
Innova Corporate (India) supplies RO Dechlorination Chemicals in Iran for Persian Gulf SWRO desalination in Bandar Abbas, Bushehr and Chabahar, Mahshahr and Assaluyeh petrochemical complexes, Abadan and Bandar Abbas refineries, and Karun River agricultural irrigation RO in Khuzestan. Residual chlorine causes irreversible damage to sensitive Thin Film Composite (TFC) and Polyamide membranes. Iran's Persian Gulf SWRO plants use chlorine-based pre-treatment to control algae and biofouling in seawater intake, refineries use chlorine in cooling water pre-treatment, and agricultural RO plants chlorinate feed water for disinfection. In every case, residual chlorine must be neutralised before it reaches the RO membranes — this is where dechlorination chemicals are essential. Our specialized liquid de-chlorinator rapidly neutralises free chlorine in Iran's water systems, ensuring total membrane safety and operational longevity.
Our RO de-chlorinator in Iran is a concentrated, stabilised liquid designed for complete elimination of residual chlorine prior to the RO system. By removing strong oxidising agents, it prevents membrane degradation and maintains the rejection performance and flow rate of your water treatment plant. It is formulated for the demanding conditions of Persian Gulf SWRO plants, where high-temperature seawater accelerates chlorine reactions and membrane oxidation risk.
Key Features & Strategic Benefits for Iran SWRO, Petrochemical & Refinery RO:
- Rapid Neutralisation: Stabilised formula ensures near-instant action in neutralising free chlorine and chloramines in Persian Gulf SWRO feed water.
- Critical Membrane Protection: Guards Polyamide and TFC membranes against oxidative degradation and chemical "burning" in Bandar Abbas and Bushehr desalination facilities.
- High-Temperature Stability: Performs reliably in high-temperature Persian Gulf seawater conditions where standard dechlorinators degrade quickly.
- SRB & Chloramine Removal: Handles both free chlorine and chloramines formed when ammonia is present in Mahshahr petrochemical feed water.
- Liquid Precision: Unlike conventional powders, our liquid formula is easy to handle, store and dose with high accuracy at Iranian plant sites.
- Enhanced Stability: Significantly more stable and effective than traditional sodium bisulfite solutions, with longer shelf life for Iran's hot climate.
- System Longevity: Prevents premature membrane replacement cost by shielding against chlorine attack in Iranian SWRO and refinery RO systems.
- ORP-Compatible: Designed to bring ORP below 200 mV before the membranes, meeting industry monitoring standards used in Iran SWRO plants.
Industries We Serve Across Iran:
Persian Gulf SWRO Desalination (Bandar Abbas, Bushehr, Chabahar): Seawater RO plants use chlorine for algae control in Persian Gulf intake systems and rely on dechlorination chemicals to protect membranes before the first pass.
Mahshahr & Assaluyeh Petrochemical: Petrochemical boiler feed and cooling water RO systems use dechlorination chemicals to neutralise chlorine from pre-treatment.
Abadan & Bandar Abbas Refineries: Refinery boiler feed and cooling make-up RO systems use dechlorination chemicals for consistent chlorine control at high temperatures.
Karun River Agricultural RO (Khuzestan): Agricultural irrigation RO systems in Khuzestan use dechlorination chemicals to protect membranes after chlorine disinfection of Karun River water.
Mining Operations (Zagros): Mining process water RO systems in Zagros use dechlorination chemicals to prevent membrane oxidation in high-chlorine feed water.
Municipal Water (Isfahan, Yazd, Shiraz): Community RO plants use food-grade dechlorination chemicals to protect membranes after chlorine disinfection.
Why Dechlorination Matters — Chlorine Damage to Iran RO Membranes:
| Parameter | Without Dechlorination | With Dechlorination |
|---|---|---|
| Membrane Surface | Oxidised, degraded | Protected, intact |
| Salt Rejection | Drops rapidly | Maintained at design level |
| Permeate Conductivity | Rises, water quality drops | Stable |
| Membrane Life | Reduced by 50% or more | Full design life |
Application & Dosage Guidelines for Iran:
The dosage depends on the residual chlorine levels and contact time. Typically, dosage ranges from 1.5 to 3 ppm sodium bisulfite per ppm of chlorine, or approximately 3–15 ppm in feed water for Iran water conditions.
- Injection Point: Should be dosed as close to the RO system as possible (e.g., before cartridge filters).
- High Chlorine Strategy: If free chlorine is high (as in Bandar Abbas SWRO after algal bloom), dose de-chlorinator prior to antiscalant injection, as chlorine can neutralise antiscalant effectiveness.
- Safe Mixing: Avoid mixing neat (concentrated) de-chlorinator and antiscalant directly; ensure dosing points are properly spaced at least 3–5 meters apart in your Iran plant setup.
- Monitoring: Track ORP continuously and target below 200 mV before the membranes. Use a DPD chlorine test kit to confirm free chlorine is below 0.05 ppm.
Common Chlorine Problems in Iran SWRO, Petrochemical & Refinery RO Systems:
Membrane Oxidation in Persian Gulf SWRO: Residual chlorine attacks polyamide membranes at Bandar Abbas and Bushehr desalination plants, causing irreversible loss of salt rejection.
Antiscalant Neutralisation: Chlorine reacts with antiscalant chemicals and reduces their effectiveness in Mahshahr petrochemical RO systems, leading to scale formation.
Chloramine Formation: When ammonia is present in Iran petrochemical feed water, chlorine forms chloramines that are harder to neutralise. Higher dechlorination dosage is required.
ORP Spike During Algal Blooms: Sudden chlorine breakthrough during Persian Gulf algal blooms raises ORP above 200 mV and can damage membranes within hours.
High-Temperature Degradation: Iran's hot climate and high-temperature Persian Gulf seawater accelerate dechlorination chemical degradation. Stabilised formulation is required.
Technical Specifications:
| Appearance | Clear to pale yellow liquid |
| Active Ingredient | Sodium bisulfite (stabilised) |
| pH (as is) | 3.5 – 5.0 |
| Specific Gravity | 1.20 – 1.35 |
| Recommended Dosage | 3 – 15 ppm in feed water (based on chlorine level) |
| Solubility | Fully miscible in water |
| Shelf Life | 12 months in original sealed container |
Frequently Asked Questions (Iran):
Q: What are RO dechlorination chemicals used for in Iran?
A: They neutralise residual chlorine in RO feed water before it reaches polyamide or TFC membranes. Chlorine is used in pre-treatment at Persian Gulf SWRO and petrochemical plants, but if it carries over to the membranes, it causes irreversible oxidation damage.
Q: Why is dechlorination critical for Iran SWRO desalination plants?
A: Iran SWRO plants in Bandar Abbas, Bushehr and Chabahar use chlorine-based pre-treatment for algae control in Persian Gulf seawater intake. Without dechlorination, residual chlorine oxidises membranes and destroys salt rejection.
Q: Which chemical is used for RO dechlorination in Iran?
A: Sodium bisulfite (SBS) is the most common chemical. It reacts rapidly with free chlorine and chloramines to form harmless sulfate and chloride. Our dechlorination chemicals are sodium bisulfite-based.
Q: How is dechlorination chemical dosed in Iran RO systems?
A: It is dosed into the feed water after media filter and before cartridge filter, using a metering pump. Typical dosage is 1.5 to 3 ppm of sodium bisulfite per ppm of chlorine.
Q: How do I monitor dechlorination effectiveness in Iran plants?
A: Monitor ORP continuously and target below 200 mV before the membranes. Alternatively, use a DPD chlorine test kit to confirm free chlorine is below 0.05 ppm.
Q: Do you supply dechlorination chemicals across Iran industrial cities?
A: Yes, we supply to SWRO, petrochemical, refinery, agricultural and industrial RO plants across Iran, including Bandar Abbas, Bushehr, Mahshahr, Assaluyeh, Abadan, Chabahar, Isfahan and Yazd.
Handling & Safety Measures:
Always wear proper safety gear, including splash goggles, lab coats, gloves and vapour respirators. In case of skin contact, wash immediately with plenty of water. Store in original containers in a cool, dry place at your Iran facility, away from direct sunlight and heat sources. Avoid contact with strong oxidisers and acids during storage. Refer to the Material Safety Data Sheet (MSDS) for comprehensive safety data.
*Note: As a company policy, Innova Corporate recommends consulting our service engineers in Iran for precise dosage requirements based on your specific water chemistry and chlorine levels.
Related Products: Explore our Membrane Antiscalant for Iran, RO Disinfectant Chemicals, and RO Membrane Cleaner for a complete RO chemical programme across Iran.