Application of Polydadmac (FL4635)

Polydadmac FL4635 is a strong cationic, liquid coagulant widely used in water treatment, industrial effluent clarification, papermaking, mining, oilfield produced water treatment, and sludge conditioning. Because polydadmac FL4635 contains high cationic charge density and excellent water solubility, it is extremely effective for destabilizing negatively charged particles, removing colloids, enhancing color removal, and improving solid–liquid separation efficiency. Below is a detailed 600-word explanation of the major applications of polydadmac FL4635.

1. Municipal and Industrial Wastewater Treatment

One of the most important uses of polydadmac FL4635 is coagulation in wastewater systems. Wastewater often contains negatively charged suspended solids, natural organic matter, dyes, colloids, and emulsified oils. Polydadmac FL4635 neutralizes the charges rapidly and forms microflocs that can be easily captured by downstream flocculants or clarifiers.

Municipal wastewater

In municipal applications, polydadmac FL4635 is used in:

Primary sedimentation
Secondary treatment clarification
Tertiary polishing filters
Phosphorus reduction systems
Sludge thickening

The strong cationic nature of polydadmac FL4635 improves turbidity removal, reduces TSS, enhances settling speed, and decreases load on biological treatment systems. It can partially replace alum or PAC, which reduces sludge volume.

Industrial wastewater

In industrial plants, polydadmac FL4635 is highly effective in:

Textile and dyeing wastewater
Petrochemical wastewater
Paper mill white water
Electronics wastewater
Steel and metalworking wastewater
Chemical manufacturing effluent

Because dyes, polymers, latexes, and surfactants are usually anionic, polydadmac FL4635 removes them efficiently, resulting in lower color, reduced COD, and improved clarity.

2. Potable Water Treatment

Many drinking water treatment facilities use polydadmac FL4635 as the primary coagulant to remove turbidity, suspended solids, algae, and natural organic matter. Compared with metal salts, polydadmac FL4635:

Produces less residual sludge
Avoids aluminum or iron residuals in finished water
Forms clearer and denser flocs
Improves filtration performance

This makes polydadmac FL4635 suitable for high-purity water systems, surface water treatment, and groundwater with high colloidal content.

3. Oil & Gas Industry – Produced Water and Frac Flowback

In oilfield wastewater treatment, polydadmac FL4635 is used as a coagulant for separating oil, solids, and chemicals from produced water and fracturing flowback. Oilfield wastewater contains emulsified oils, fine clays, and silica; polydadmac FL4635 helps break the emulsions and enhance oil droplet coalescence.

Key oilfield applications include:

Produced water clarification
Demulsification support
Slop oil recovery
DAF separation units
Flowback recycling systems

By improving floc formation and oil separation, polydadmac FL4635 reduces the load on downstream dissolved air flotation (DAF) and filtration systems.

4. Papermaking and Pulp Processing

In the paper industry, polydadmac FL4635 acts as an excellent fixing agent, retention aid, and coagulant. Papermaking systems generate large amounts of white water containing anionic trash, fibers, fillers, and wet strength additives.

Polydadmac FL4635 helps:

Stabilize wet-end chemistry
Reduce anionic trash
Improve retention of pigments and fillers
Enhance drainage on the forming wire
Lower cationic demand
Reduce foam and improve sheet formation

It also enhances performance when used together with anionic polyacrylamide for dual polymer retention systems.

5. Mining and Mineral Processing

In mining industries, polydadmac FL4635 is used for coagulation before thickening and clarification. Tailings slurry and process water contain ultra-fine particles such as clay, silica, metal oxide fines, and residual flotation reagents. Polydadmac FL4635 effectively neutralizes these particles and increases thickener settling speed.

Applications include:

Tailings thickener feed conditioning
Process water clarification
Filtration enhancement
Removal of flotation reagents

In coal washing plants, polydadmac FL4635 improves fine coal recovery and reduces turbidity in thickener overflow water.

6. Sludge Dewatering and Thickening

Municipal and industrial sludge treatment processes often require conditioning before mechanical dewatering. Polydadmac FL4635 improves sludge structure and enhances floc formation prior to applying high-molecular-weight flocculants.

It is commonly used in: