Nonionic Polyacrylamide (NPAM)
Nonionic PAM works where anionic and cationic types cannot — in acidic environments below pH 6. Essential for gold, copper, and iron ore processing, coal washing fine coal recovery, and acid mine drainage treatment. Zero ionic charge means no interference with mineral surfaces during flotation.
NPAM for Mineral Processing
Nonionic PAM for acidic ore processing, coal washing, flotation, and fine mineral recovery where ionic PAM grades lose performance.
MW: 5–10 million Da
Effective pH: 4.0–8.0
Frequently Asked Questions
When should I use nonionic polyacrylamide instead of anionic or cationic?
Use nonionic PAM when your water/slurry pH is below 6 (acidic conditions). Anionic and cationic PAM lose effectiveness in acidic environments because their ionic charges are neutralized. NPAM has zero ionic charge, so it works reliably at pH 4-8 — making it essential for acid mine drainage, gold/copper leaching, and acidic industrial waste.
What industries use nonionic polyacrylamide?
Primary users: gold mining (CIL/CIP tailings at pH 2-4), copper leaching (acidic heap leach solutions), coal washing (fine coal recovery), iron ore processing, and acid mine drainage treatment. Also used in textile dyeing (acidic dye baths) and food-grade applications where ionic interference must be avoided.
What is the price difference between nonionic and anionic PAM?
Nonionic PAM typically costs $1,300-$2,500/ton FOB China, slightly more than standard anionic grades ($1,200-$2,800/ton) because of specialized production requirements. However, in acidic applications where APAM fails completely, NPAM is the only viable option regardless of price.
Working with acidic wastewater? Tell us your pH and we will confirm if NPAM is the right choice.
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