Sodium Tripolyphosphate For Water Treatment
[Product Instructions for Professional Grade Sodium Tripolyphosphate for Water Treatment]
▍Molecular-level water quality optimization solution
STPP-5000 industrial-grade sodium tripolyphosphate is a high-purity water treatment agent prepared by crystal phase reconstruction technology. It has passed the ISO 9001:2015 quality system and NSF/ANSI 60 drinking water certification. The product implements the HG/T 2764-2020 industrial standard, and the sodium ion chelation efficiency reaches 98.7% (ASTM D1126 test method), providing a triple protection barrier for industrial water systems.
▶Technical parameter table (measured value)
| Indicator Item | Standard Requirement | Measured Value of This Product |
|---|---|---|
| Main Content (Na₅P₃O₁₀) | ≥94.0% | 96.2 ± 0.3% |
| Water Insoluble Matter | ≤0.10% | 0.05% |
| pH Value (1% solution) | 9.2 – 10.0 | 9.7 |
| Apparent Density (g/cm³) | 0.70 – 0.90 | 0.82 |
| Calcium Chelation Value (mg/g) | ≥320 | 345 |
| Fluoride (in F) | ≤0.003% | 0.0018% |
▍Multi-scenario performance verification
■ Boiler water system: Under 2.5MPa pressure conditions, after continuous use for 6 months, the scale thickness of the heat exchange tube is ≤0.03mm , which extends the equipment cleaning cycle by 3.8 times compared with traditional phosphate preparations
■ Circulating cooling water: When used in combination with zinc salts, the corrosion rate of carbon steel is controlled below 0.025mm/a (refer to GB/T 18175 standard), which is particularly suitable for areas with high hardness (＞450mg/L CaCO3) water quality
■ Reverse osmosis pretreatment: As a precursor of RO membrane scale inhibitor, it can reduce the membrane pollution index by 27% underwater quality conditions with SDI＜5 and realize intelligent dosing with the online monitoring system
■ Municipal sewage treatment: In the pH range of 6.5-8.5, the removal rate of heavy metal ions (Pb²+, Cd²+) reaches 89.6%, which meets the GB 18918-2002 emission standard
★ Process advantage matrix
① Crystal stabilization technology: The α-type crystal content is obtained by vacuum crystallization process>92%, ensuring that the dissolution rate is increased by 40% at a water temperature of 40℃
② Multivalent chelation effect: The unique P-O-P chain structure can simultaneously complex Ca²+, Mg²+, Fe³+ and other ions to form soluble complexes
③ Environmentally friendly formula: It does not contain nitrogen elements, avoids the risk of eutrophication of water bodies, and the biodegradation rate (28 days) reaches 78.5%
④ Energy saving and economic efficiency: The cost of water treatment per ton is 35% lower than that of organic phosphonates, and no pH regulator is required
▍Quality traceability system
√ Raw material traceability: It is prepared using electronic grade yellow phosphorus (purity 99.99%) and food grade soda ash, and each batch provides ICP-MS metal impurity detection spectra
√ Production control: The DCS system monitors the condensation reaction temperature (±1℃) and phosphorylation degree (n=3±0.05) in real-time
√ Storage specifications: double-layer PE film vacuum packaging (25kg/bag), stored in a cool warehouse away from light, valid for 36 months
▍Technical Q&A area
Q: Compatibility with silicate corrosion inhibitors?
A: It is recommended to control the SiO₂ concentration to less than 60mg/L and set a 15-minute interval buffer period in the dosing system
Q: Low-temperature environment dissolution solution?
A: Provide the design drawings of the pre-dissolution device. 40℃ warm water can increase the dissolution rate to 2.3 times the normal conditions
Q: Sludge disposal suggestions?
A: The chelated precipitate has been tested and meets the GB 5085.3 standard and can be treated as general solid waste
▍FAQ Professional Answers for Sodium Tripolyphosphate (STPP) Water Treatment Application
[Technical Characteristics]
Q1: What is the special significance of your product’s 96.2% main content for practical applications?
A: Based on the high purity characteristics of crystal phase reconstruction technology, the chelating capacity of each batch of products is stabilized in the range of 345-348mg CaCO3/g (±2% deviation). In a 2,000-ton circulating water system, the dosage can be reduced by 15% compared with ordinary STPP while avoiding the risk of secondary scaling caused by impurities. Third-party testing shows that the standard deviation of scale inhibition efficiency can be maintained at <1.8% when the primary content fluctuates ≤0.5% (test report WT2023-091)
Q2: How can we improve the use effect when the α-type crystal content is >92%?
A: α-type crystals have better hydration characteristics: ① The dissolution rate is 3 times faster than that of β-type (tested at 25℃ water temperature) ② The corrosion inhibition efficiency is increased by 22% when used in conjunction with zinc salts ③ The anti-caking performance in pipeline transportation is improved by 40%. The XRD diffraction pattern can verify the crystal configuration
[Application scheme]
Q3: What is the precise dosing scheme for high-hardness water (＞500mg/L)?
A: It is recommended to adopt a three-stage dosing method:
Initial stage: pre-membrane treatment of water body at 3.2g/m³ (lasting 48 hours)
Daily maintenance: dynamically adjust in the range of 1.8-2.4g/m³ according to the data of the online conductivity meter
Impact treatment: When calcium hardness increases suddenly, it is instantly increased to 5g/m³ and cooperated with pH monitoring (maintained at 9.0-9.5)
Q4: How can we ensure compatibility with the reverse osmosis membrane system?
A: This product is NSF/ANSI 60 certified and specially designed:
• Ultra-low fluoride (<20ppm) to avoid membrane oxidation
• Particle size control D90 <80μm to ensure complete dissolution
• Provide a compatibility list of membrane manufacturers (including six major brands such as DOW Filmtec and Hydranautics)
[Safety and Environmental Protection]
Q5: How do we prove the environmental protection characteristics of the product?
A: Three authoritative verifications:
28-day biodegradation rate 78.5% (OECD 301D standard)
Aquatic acute toxicity EC50>100mg/L (GB/T 27861-2011)
The sludge leaching toxicity test value is lower than the GB 5085.3 limit of 40%
Q6: Will phosphorus-containing preparations cause eutrophication?
A: This product achieves dual prevention and control through process innovation:
• Precise dosage control: Develop STPP-CALC intelligent calculation tool
• End treatment solution: Provide phosphate capture agent (optional) to make the total phosphorus emission <0.5mg/L
[Quality Assurance]
Q7: How do you verify the consistency of product batches?
A: Four-fold verification channel:
① Scan code traceability: The QR code on the packaging bag can view the ICP-MS test data of the current batch
② Rapid identification: Provide a colour detection kit (5 minutes to verify the characteristic reaction of Na5P3O10)
③ Third-party review: Support customers to take samples for inspection by SGS and other institutions
④ Production process audit: Open DCS system historical data query (need to sign a confidentiality agreement)
Q8: Storage recommendations under extreme temperature environments?
A: Storage solutions verified by accelerated experiments:
• High-temperature environment (＞40℃): Use heat-insulating packaging and silica gel desiccant (customized packaging service is provided)
• Low-temperature environment (＜-20℃): Use antifreeze PE film, and the measured dissolution rate retention rate after thawing is ＞97%
[Technical Service]
Q9: Are there any successful application cases for reference?
A: Typical customer evidence:
✓ A 320MW unit in a thermal power plant: After 18 months of continuous operation, the boiler blowdown rate was reduced to 0.78% (the original system was 1.5%)
✓ Ultrapure water system in a semiconductor plant: With ion exchange resin, the resistivity of the produced water is stabilized at 18.2MΩ·cm
✓ Offshore platform circulating water system: Under the condition of Cl- concentration of 8000mg/L, the corrosion rate of carbon steel is ＜0.03mm/a
Why Choose Us
At GOWAY INTERNATIONAL MATERIAL CO., LTD, we stand out in the sodium tripolyphosphate (STPP) industry with over 20 years of expertise, a reputation built on reliability, and a dedication to delivering industrial-grade products that meet the highest standards. Our factory, located in Fuquan, Guizhou, boasts a 30,000-ton annual production capacity, making us one of the most trusted suppliers in the market.
Unmatched Expertise
With more than two decades of experience, we have mastered every aspect of the Sodium Tripolyphosphate manufacturing process. Our team of experts ensures that each batch of STPP meets precise specifications, providing you with a product that enhances the performance of your products, from detergents to water treatment solutions.
Innovative Technology
We pride ourselves on being the first fully automatic manufacturer of STPP in Guizhou. This cutting-edge technology not only increases our production efficiency but also guarantees the consistent quality and purity of our products, making us an industry leader.
Direct-from-Factory Sales Model
By operating under a direct-from-factory sales model, we can offer highly competitive prices without compromising quality. This structure enables us to provide cost-effective solutions while building strong, lasting relationships with our customers.
Commitment to Quality
As a National High-Tech Enterprise, we adhere to the strictest quality control measures to ensure that every batch of STPP is of the highest standard. Our products are essential in various industries, including detergents, water treatment, and chemical manufacturing, and our unwavering focus on quality makes us a trusted partner for businesses worldwide.
Frequently Asked Question
We offer a variety of shipping methods depending on your location and urgency. This includes sea freight, air freight, and land transport. For smaller orders, we may also offer express delivery services like DHL, FedEx, or UPS to ensure timely arrival.
The delivery time depends on the shipping method and your location. For sea freight, the usual delivery time ranges from 20 to 40 days, while air freight generally takes 5 to 7 days. Once we receive your order and confirm the shipping details, we will provide you with a more precise delivery estimate.
We have extensive experience in handling international shipments. We take care of all the necessary paperwork, including customs declarations and import/export documentation. We also offer assistance with customs clearance to ensure smooth and efficient delivery.
Yes, once your order is shipped, we will provide you with a tracking number and the relevant tracking details. You can monitor the progress of your shipment directly through the carrier’s website or by contacting our customer service team for assistance.
In the event of a delay, we will promptly inform you and work closely with the shipping provider to resolve the issue. We are committed to delivering your order on time and will do our best to ensure that any issues are handled quickly and efficiently.
Depending on the delivery location and shipping method, there may be additional fees such as customs duties, taxes, or handling fees. These fees are generally the responsibility of the buyer, but we will inform you of any such costs before shipping.
