Nonionic Polyacrylamide (NPAM) | PAMCHEM
Nonionic Polyacrylamide (NPAM) is a high-molecular-weight water-soluble synthetic polymer used as a flocculant and coagulant aid in acidic, neutral, or high-salinity industrial environments. Carrying a neutral electrical charge, NPAM remains effective where ionic interference prevents charge-neutralization mechanisms.
Synthesized via aqueous solution polymerization in our ISO 9001 and ISO 14001 certified facility, our NPAM grades utilize high-purity acrylamide monomer, followed by precision drying and mechanical classification.
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Product Grades & Types
|
Grade Code |
Form |
Molecular Weight (Million Daltons) |
Solid Content (%) |
Dissolution Time (Min) |
Primary Application Focus |
|
PAM-N10 |
Granular Powder |
8 – 10 |
≥ 88 |
≤ 45 |
Coal washing, mineral tailings thickening |
|
PAM-N12 |
Granular Powder |
10 – 12 |
≥ 88 |
≤ 50 |
Acidic wastewater, metallurgical slurries |
|
PAM-N15 |
Granular Powder |
14 – 16 |
≥ 88 |
≤ 60 |
Paper retention aid, heavy metal precipitation |
|
PAM-N18 |
Granular Powder |
18 – 20+ |
≥ 88 |
≤ 75 |
Enhanced oil recovery (EOR), specialized filtration |
Key Properties & Performance
Charge Neutrality
Lacks ionic functional groups, preventing precipitation in divalent ion-rich (Ca²⁺, Mg²⁺) or high-salinity liquors.
Hydrogen Bonding
Amide groups (CONH₂) form strong hydrogen bonds with suspended solids, binding particles into dense flocs.
pH Adaptability
Retains efficiency across pH 1 to 7, outperforming anionic polymers in acidic streams.
Shear Stability
Optimized molecular weight distribution balances bridging efficiency with mechanical shear resistance.
Technical Specifications
|
Parameter |
Specification |
|
Appearance |
White to off-white free-flowing granules |
|
Degree of Hydrolysis |
< 5% |
|
Residual Acrylamide Monomer |
< 0.05% |
|
Bulk Density |
0.60 - 0.75 g/cm³ |
|
Insolubles |
< 0.1% |
|
Shelf Life |
24 months (stored below 30°C, relative humidity < 60%) |
Mining & Metallurgy: Dewatering acidic leaching residues, gold cyanidation tailings, and uranium processing slurries.
Water Treatment: Clarifying and thickening industrial effluents with high acid or Total Dissolved Solids (TDS).
Paper Manufacturing: Wet-end additive and retention aid in acidic paper machines.
Oil & Gas: EOR flooding agents and high-salinity drilling fluid additives.
Evaluate Feedstock: If pH < 5 or TDS > 10,000 ppm, select NPAM over anionic alternatives.
Select Molecular Weight
- PAM-N10 to PAM-N12: Rapid gravity settling and coarse suspension clarification.
- PAM-N15 to PAM-N18: Fine colloidal filtration and belt press dewatering.
Verify via Jar Testing: Prepare a 0.1% solution, age 45 minutes, and test dosages from 1 ppm to 10 ppm.
Manufacturing & Quality Control
Polymerization & Sizing
Produced via closed-loop reactors and automated drying beds, then sifted to a 20–60 mesh distribution.
Testing Protocols
Every lot is verified via Ubbelohde viscometers (molecular weight), HPLC (residual monomer), and rotational viscometers. A batch-specific COA is supplied with every shipment.
Packaging & Supply
Packaging Options: 25 kg polyethylene-lined craft paper bags; 750 kg / 1000 kg PP bulk super sacks (FIBC).
Storage Requirements: Keep on wooden pallets away from direct moisture. Maintain storage temperatures between 5°C and 30°C to prevent hygroscopic clumping.
Customization & Sample Testing
Sample Policy: Free 500 g sample packets provided for laboratory jar testing upon specification of application parameters.
Customization: Tailored molecular weight fractions and specific residual monomer limits available for contract supply.
Frequently Asked Questions
As one of the leading nonionic polyacrylamide manufacturers and suppliers in China, we warmly welcome you to buy the best nonionic polyacrylamide made in China here from our factory. For price consultation, contact us.
