Cationic Polyacrylamide - China Cationic Polyacrylamide Manufacturers Suppliers Factory

Product Overview

Cationic Polyacrylamide (CPAM) is a high-molecular-weight, water-soluble linear polymer functionalized with positive ionic active groups along its carbon chain. Engineered for industrial solid-liquid separation, it neutralizes negative surface charges on suspended colloids and bridges fine particles into dense, fast-settling flocs.

Manufactured via aqueous solution and inverse emulsion polymerization using high-purity acrylamide monomer and quaternary ammonium-based cationic co-monomers, this polymer line delivers targeted charge densities and controlled molecular weight distributions for municipal sludge dewatering, industrial wastewater clarification, and paper wet-end optimization. Available in solid granular and liquid emulsion formats.

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Product Specifications

Technical Parameter	Test Method / Standard	Grade A (Medium MW / High Charge)	Grade B (High MW / Medium Charge)	Grade C (Ultra-High MW / Low Charge)
Physical Form	Visual	Free-flowing white granule / powder	Free-flowing white granule / powder	Free-flowing white granule / powder
Molecular Weight	Ubbelohde Viscometer	8 - 10 Million Daltons	12 - 15 Million Daltons	16 - 18 Million Daltons
Ionic Degree (Charge Density)	Colloid Titration	40% - 50%	20% - 30%	10% - 15%
Dissolution Time (0.1% sol.)	Mechanical Stirring (20 degrees C)	Less than or equal to 60 minutes	Less than or equal to 60 minutes	Less than or equal to 90 minutes
Residual Monomer	HPLC	Less than or equal to 0.05%	Less than or equal to 0.05%	Less than or equal to 0.05%
Insolubles	Sieve Residue (100 mesh)	Less than or equal to 0.1%	Less than or equal to 0.1%	Less than or equal to 0.1%
Moisture Content	Oven Drying (105 degrees C, 2h)	Less than or equal to 10.0%	Less than or equal to 10.0%	Less than or equal to 10.0%
pH Range (0.1% aqueous sol.)	pH Meter (25 degrees C)	5.0 - 7.0	5.0 - 7.0	5.0 - 7.0

Key Features

Rapid Charge Neutralization:

High cationic charge density neutralizes electrical double layers on negatively charged organic colloids instantly, shortening destabilization time.

Shear-Resistant Flocculation:

Long-chain polymer architecture forms robust bridging networks that withstand high mechanical shear forces inside centrifugal decanders and high-pressure belt filter presses.

Low Effective Dosing Rates:

Active polymer content greater than or equal to 88% enables effective solid-liquid separation at dosages ranging from 1 to 5 ppm in clarification and 50 to 200 g/dry ton in sludge dewatering.

Complete Hydration Kinetics:

Minimized micro-gel fraction ensures rapid dissolution without forming agglomerated fish-eyes, preventing dosing pump check-valve blockage.

Strict Monomer Control:

Residual acrylamide kept below 0.05% to comply with strict ecological toxicity and workplace safety regulations.

Applications

Municipal and Industrial Sludge Dewatering: Applied in municipal wastewater treatment plants and industrial effluent facilities (textile, chemical, tannery, food processing) prior to belt filter presses, centrifuge decanders, and screw presses to reduce cake moisture content below 75%.

Dissolved Air Flotation (DAF): Enhances oil-water separation and suspended solids removal in petrochemical and slaughterhouse wastewater pre-treatment units.

Papermaking Wet-End Additive: Serves as a retention and drainage aid in paper machine wet-ends, improving fiber and filler retention while accelerating water drainage on the wire.

Mining and Mineral Processing: Settling agent for metallic ore tailings (iron, copper, gold, coal washing) and thickener feed clarification in hydrometallurgical circuits.

Oil and Gas Operations: Used in enhanced oil recovery (EOR) profile modification and produced water treatment prior to reinjection.

Product Selection Guide

Selecting the correct CPAM grade requires matching polymer charge density to the Zeta potential of the suspended solids, and molecular weight to the mechanical dewatering equipment type.

Determine Sludge / Wastewater Origin
• Organic Sludge (Municipal sewage, food processing, slaughterhouse): Requires medium-to-high cationic charge density (30% to 50%) to bond with biological cell debris and proteins.
• Inorganic / Mineral Sludge (Mining tailings, inorganic chemical precipitates): Requires low-to-medium cationic charge (10% to 20%) with high molecular weight for bridging.

Match Dewatering Equipment
• Centrifuge Decanter: Requires ultra-high molecular weight and medium charge density to withstand high shear forces inside the bowl.
• Belt Filter Press: Requires balanced molecular weight and high charge density to form porous, permeable cakes that release water rapidly under roller pressure.
• Screw Press: Requires moderate molecular weight with quick uncoiling properties for low-shear flocs.

Conduct Jar Testing
Prepare a 0.1% stock solution of candidate grades using clean, chlorine-free water aged for 60 minutes.
Inject incremental doses into representative wastewater samples under rapid mixing (200 rpm for 30 seconds) followed by slow flocculation (40 rpm for 60 seconds).
Evaluate supernatant clarity, floc settling velocity, and drainage rate on a standard Buchner funnel test apparatus.

Manufacturing & Quality Control

Polymerization Process:

Synthesized via advanced aqueous solution and inverse emulsion polymerization in temperature-regulated reactor vessels under inert nitrogen blankets to control chain growth and prevent cross-linking side reactions.

Drying and Grinding:

Continuous fluidized-bed drying followed by mechanical air-swept milling ensures uniform particle size distribution (20 to 80 mesh) free of oversized agglomerates.

Quality Inspection Protocols:

Every production lot undergoes rigorous analytical testing prior to release, including intrinsic viscosity measurement via Ubbelohde viscometers, colloid titration for charge density verification, HPLC analysis for residual monomer quantification, and dry solids residue determination.

Traceability and Retention:

Samples from every production batch are retained in climate-controlled archives for 24 months, accompanied by individual Certificates of Analysis (CoA) matching lot numbers to packaging pallets.

Packaging & Supply Capacity

Standard Packaging:
25 kg multi-layer kraft paper bags with inner polyethylene moisture-proof liners, palletized and shrink-wrapped (40 bags per pallet, 1 metric ton per pallet).
750 kg / 1000 kg heavy-duty woven polypropylene jumbo bags (FIBC) with discharge spouts.

Storage and Handling: Store in cool, dry, well-ventilated areas away from direct sunlight and moisture. Unopened packaging remains stable for 24 months. Spilled polymer becomes extremely slippery when wet; sweep up dry granules immediately before washing surfaces with water.

Supply Capacity and Logistics: Annual production capacity of 50,000 metric tons. Main shipping ports: Qingdao and Shanghai, China, with standard lead times of 14 to 21 days for full container loads (FCL).

Why Choose Ecolink

Direct Manufacturer Control:

Complete vertical integration from monomer formulation and polymerization to final particle sizing, eliminating middleman variation.

Consistent Rheological Properties:

Strict control over reactor temperature profiles and initiator dosing ensures stable molecular weight distribution batch after batch, preventing dosage drift in automated plant systems.

Comprehensive Technical Documentation:

Every shipment includes a lot-specific Certificate of Analysis, technical data sheet, and safety data sheet compliant with OSHA and GHS standards.

Application Laboratory Support:

In-house laboratory equipped with jar test stirrators, capillary suction time (CST) testers, and digital viscometers to evaluate client wastewater samples and recommend precise polymer grades.

Frequently Asked Questions

Q: How do I determine whether my application requires a cationic, anionic, or non-ionic polyacrylamide?

A: The choice depends strictly on the net electrical charge of the suspended particles in your system. Cationic polyacrylamide (CPAM) is used for municipal sewage and organic industrial sludges carrying negative surface charges. Anionic polyacrylamide (APAM) is used for inorganic mineral tailings, coal washing, and positively or neutrally charged industrial effluents. Non-ionic polyacrylamide (NPAM) is primarily used in strongly acidic wastewater conditions.

Q: What causes polymer solutions to lose viscosity or break down during preparation?

A: Polymer degradation is typically caused by three factors: excessive high-speed mechanical agitation (above 1500 rpm) during stock solution dissolution which shears the polymer chains; prolonged storage of diluted solutions (stock solutions at 0.1% concentration degrade within 48 hours due to microbial action and hydrolysis); and residual oxidizing agents or heavy metal ions in the dilution water.

Q: How should solid CPAM powder be dissolved to prevent fish-eyes (undissolved gel lumps)?

A: Add the powder slowly into a vortex of vigorously stirred water at ambient temperature (15 to 25 degrees C). Never dump dry powder directly into still water or add water into dry powder, as surface hydration creates a gel barrier around dry cores. Maintain continuous gentle agitation for 45 to 60 minutes until the solution achieves complete optical clarity and uniform viscosity.

Q: Can cationic polyacrylamide be stored in standard carbon steel tanks or piping?

A: No. While dry CPAM powder is stable in sealed containers, aqueous solutions of CPAM are mildly corrosive and can cause surface oxidation on carbon steel. Solution preparation tanks, dosing lines, valves, and pump heads must be constructed from corrosion-resistant materials such as stainless steel (304 or 316), PVC, fiberglass-reinforced plastic (FRP), or high-density polyethylene (HDPE).

Request a Quote

Ready to evaluate our Cationic Polyacrylamide in your facility? Contact our technical team for product selection assistance or request a 500g sample for laboratory jar testing.
Email: sales@ecolink-chemicals.com
Technical Support: tech@ecolink-chemicals.com
Required Request Details: Please specify your wastewater type, current dewatering equipment (e.g., belt press, centrifuge), target cake moisture, and required annual volume.

Shandong Ecolink Technology Co., Ltd. is one of the most reliable cationic polyacrylamide manufacturers and suppliers in China. We warmly welcome you to wholesale bulk high quality cationic polyacrylamide from our factory. If you have any enquiry about cooperation, please feel free to email us.

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