Cationic Polyacrylamide (CPAM)
Basic Information
Name: Cationic Polyacrylamide
Other names: CPAM; polyacrylamide (PAM); cationic flocculant Molecular formula: (C₃H₅NO)n copolymerized with cationic monomer Molecular weight: Polymer (several million to tens of millions dalton) CAS number: 9003-05-8
Ionic types: Polyacrylamide is classified by ionic character into cationic (CPAM), anionic (APAM) and nonionic (NPAM) types. This document focuses on the cationic type while also covering the anionic type.
2.Physical and Chemical Properties
- Appearance: White powder or granules
- Solubility: Soluble in water (forms viscous solution)
- Molecular weight: Several million to tens of millions dalton
- Ionic character: Cationic (positive charge) or anionic (negative charge)
- Stability: Stable; hygroscopic
3.Main Functions and Applications (What are its uses?)
- Sludge dewatering (cationic type, core application): CPAM is the first-choice flocculant for sludge dewatering. Through charge neutralization and bridging, it rapidly flocculates and dewaters sludge, and is widely used in municipal sewage plants, papermaking and chemical sludge treatment.
- Industrial wastewater treatment (anionic type, core application): APAM is used for flocculation and clarification of mineral processing, metallurgical and coal-washing wastewater, accelerating the settling of suspended solids.
- Papermaking retention and drainage: Both cationic and anionic PAM serve as retention and drainage aids, improving the retention of fine fibers and fillers.
- Oilfield: APAM is used as an oil-displacing agent, drilling-fluid viscosifier and fracturing-fluid friction reducer.
- Drinking water treatment (anionic type): APAM meeting sanitary standards is used for drinking water flocculation.
- How to choose between the two types: The cationic type suits negatively charged sludge and colloids, while the anionic type suits positively charged inorganic particle systems; the choice depends on the charge characteristics of the water.
4.A Benchmark-Level Industrial Masterpiece - A Meticulously Crafted "High-Efficiency Flocculation" Polymer!
High solid content with a wide range of molecular weight and ionic degree.
Ultra-low residual acrylamide monomer for safety.
Fast dissolution and excellent flocculation performance.
"What you see is what you get" - every lot ships with a complete certificate of analysis.
Product Specification - Cationic Polyacrylamide (CPAM)
Cationic Grades (CPAM)
|
Grade |
Solid content (%) |
Molecular weight (×104) |
Cationic degree (%) |
|
CPAM-LD (Low cationic degree) |
≥ 88 |
800 – 1200 |
10 – 25 |
|
CPAM-MD (Medium cationic degree) |
≥ 88 |
600 – 1000 |
25 – 45 |
|
CPAM-HD (High cationic degree) |
≥ 88 |
400 – 800 |
45 – 80 |
Anionic Grades (APAM)
|
Grade |
Solid content (%) |
Molecular weight (×104) |
Degree of hydrolysis (%) |
|
APAM-LH (Low hydrolysis) |
≥ 88 |
1200 – 1800 |
5 – 15 |
|
APAM-MH (Medium hydrolysis) |
≥ 88 |
1500 – 2500 |
15 – 30 |
|
APAM-HH (High hydrolysis) |
≥ 88 |
1000 – 1800 |
30 – 60 |
Common Specifications
|
Item |
Specification |
|
Appearance |
White powder or granules |
|
Residual acrylamide monomer (%) |
≤ 0.05 (drinking-water grade) / ≤ 0.5 (industrial grade) |
|
Dissolution time (min) |
≤ 60 |
|
Water-insoluble matter (%) |
≤ 0.3 |
|
pH (1% aqueous solution) |
6.0 – 8.0 |
|
Packaging |
25 kg woven bag with PE inner |
- Test methods reference: solid content by oven-drying method; molecular weight by viscometry; cationic degree / degree of hydrolysis by colloidal titration; residual acrylamide by HPLC; water-insoluble matter by gravimetric method; pH by potentiometric method. (GB 17514 / GB/T 31246)
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