Cationic polyacrylamide

The cationic polyacrylamide series products are linear high molecular polymers made by the copolymerization of cationic monomers (DM, DMC, CPF, DMDAAC, DMAEMA, etc.) and acrylamide through granulation, drying and crushing.

Product Introduction

The cationic polyacrylamide series products are linear high molecular polymers made by the copolymerization of cationic monomers (DM, DMC, CPF, DMDAAC, DMAEMA, etc.) and acrylamide through granulation, drying and crushing. It is composed of a variety of active groups, which can have affinity and adsorption with many substances to form hydrogen bonds. It has the functions of decolorization, adsorption, turbidity removal, bonding, and sludge dewatering.

Product Usage

1. Sludge dehydrating agent: Urban and industrial sewage are commonly treated by activated sludge method. Biochemical sludge is often a highly hydrophilic colloid with high organic content and extremely difficult to dehydrate. It is treated with cationic polyacrylamide, the dosage is small, the dehydration efficiency is high, and it is easy to separate.

2. Papermaking auxiliaries: In the papermaking industry, it can directly bridge the inorganic salt ions, fibers and other organic polymers to enhance the physical strength of the paper and reduce fiber or cations. Reduce the loss of fiber or filler, speed up the filtration, and enhance, retain and filter. It can also be used for white water treatment, which can easily achieve obvious flocculation effect during deinking.

3. Treatment of sewage and organic wastewater: This product is positively charged in acidic or alkaline medium, so that flocculation of sewage containing more suspended particles with negative charge is very effective. Such as alcohol plant wastewater,brewery wastewater, MSG wastewater, sugar plant wastewater, meat factory wastewater, beverage plant wastewater, textile printing and dyeing plant wastewater. For such wastewater, cationic polyacrylamide is several times or tens of times more effective than anionic polyacrylamide, nonionic polyacrylamide or inorganic salts.

4. Water treatment flocculant used in waterworks with rivers as the water source: less dosage, good effect and low cost. Especially in combination with inorganic flocculants, the effect is better. It will be a highly efficient flocculant for water plants along the Yangtze, Yellow, Huaihe and other river basins.

5. Oilfield chemical agents: such as clay anti-swelling agents, thickeners for oil field acidification, etc.

Packaging and storage

1.The product uses 25kg outer layer PVC plastic woven bag and inner film two-layer packaging. Can also be packaged according to user requirements.

2.When storing and transporting, pay attention to heat and moisture, and dry powder products will absorb moisture and agglomerate when exposed for a long time. The number of stacking layers must not exceed 20 layers. The effective storage period is 2 years.

Index parameter

Index name\Product rating	Execution standard(GB/T31246-2014)
	C2080	C4010	C5012	C6014
Free monomer            %≤	0.05	0.05	0.05	0.05
Molecular weight(million)	800	1000	1200	1400
Solid content           %≥	90	90	90	90
lon degree              %≤	20	40	50	60
Dissolution time     min≤	50	45	40	30
Insoluble content       %≤	0.2	0.2	0.2	0.2

Effects of cationic polyacrylamide (CPAM)

1. Adsorption bridging: CPAM molecular chains are fixed on the surfaces of different particles, and polymer bridges are formed between the particles, so that the particles form aggregates and settle.

3. Surface adsorption: various adsorptions of group particles on CPAM molecules.

4. Reinforcement: CPAM molecular chains and dispersed phases are implicated together through various mechanical, physical, and chemical effects to form a network, thereby enhancing the effect.

Before using cationic polyacrylamide, the solid must be prepared into a 0.1-0.5% standby solution, which can be diluted or hydraulically transported when added. The storage period of 0.5% standby solution is seven days, and the

storage period of 0.05% added solution is three days.

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Cationic polyacrylamide (CPAM) application areas

1. Used for industrial wastewater treatment. Especially for wastewater with coarse suspended particles, high concentration, positively charged particles, and neutral or alkaline pH values, such as steel plant wastewater,electroplating plant wastewater, metallurgical wastewater, coal washing wastewater, etc., the treatment effect is very good.

2. Drinking water treatment. The water of many water plants in my countrycomes from rivers with high sediment and mineral content, which is relatively turbid. Although it has been treated by sedimentation, it still does not meet

the requirements. It is necessary to add flocculants to make the water clear. Many water plants use inorganic flocculants, but the dosage is one-fiftieth of that of inorganic flocculants, but the effect is several to dozens of times that of inorganic flocculants. Sometimes it is better to use it in combination with polyaluminium chloride.

3. Used as a water plugging agent in oil fields, and an oil displacement agent for three times.

In oil production, CPAM is mainly used for drilling mud materials and improving oil recovery. It is widely used in oil field production operations such as drilling, completion, cementing, fracturing, and enhanced oil recovery.

It has the functions of viscosity increase, filtration loss reduction, rheological adjustment, gelation, diversion, and profile adjustment.

4. Papermaking field. Cationic polyacrylamide is mainly used for papermaking wastewater treatment and filtration aid. It also has a good effect on improving the retention rate of fillers. In addition, CPAM is also used for

papermaking wastewater treatment and fiber recovery.

5. Textile field. In the textile industry. PAM is used as a sizing agent and finishing agent for fabric post-treatment to generate a soft, wrinkle-resistant, and mildew-resistant protective layer. Using its strong hygroscopicity, it can reduce the breakage rate during spinning. CPAM as a post-treatment agent can prevent static electricity and flame retardancy of fabrics. When used as a printing and dyeing auxiliary, CPAM can make the product

have a strong adhesion and high brightness. In addition, PAM can also be used for the purification of textile printing and dyeing wastewater.

6. In the field of mining and coal washing. Using PAM as a flocculant can promote the sedimentation of solids in mining and coal washing recovery water, make the water clear, and at the same time recover useful solid particles to

avoid pollution to the environment.

7. Other fields. In the sugar industry. CPAM can accelerate the sinking of fine particles in sugarcane juice, promote filtration and improve the clarity of the filtrate. In the breeding industry, CPAM can improve water quality, increase

the light transmittance of water, and thus improve the photosynthesis of water. In the pharmaceutical industry and the building materials industry, CPAM can be used as a coating thickening dispersant, a sawn stone board coolant, and a ceramic adhesive. In agriculture, CPAM can be used as a highly absorbent material as a soil moisturizer and seed culture agent. In the construction industry, CPAM can enhance the hardness of gypsum cement and accelerate the

dehydration rate of asbestos cement.

Parameter Category	Parameter Name	Abbreviation	Common Range/Specification	Parameter Description
Basic Characteristics	Ion Type	Ion Type	Cationic	Determines its charge property; used to adsorb negatively charged colloidal particles (such as suspended solids and sludge in wastewater) to achieve flocculation/dewatering effects
	Appearance	Appearance	White/light yellow granules, powder; some are in emulsion form	Granules/powder need to be dissolved before use. Emulsion-type products have faster dissolution rates and are suitable for continuous production scenarios
	Solid Content	Solid Content	Granules/powder: 88%~95%; Emulsion-type: 30%~50%	Reflects the proportion of active ingredients. The higher the solid content, the stronger the effective action of the product per unit mass, and the relatively lower the transportation cost
Charge Performance	Cationicity	Cationicity	10%~80% (Conventional: 20%~60%)	Refers to the proportion of cationic groups on the molecular chain, a core parameter: - Low cationicity (10%-30%): Suitable for sludge dewatering (e.g., municipal sludge) and weakly negatively charged systems; - High cationicity (50%-80%): Suitable for strongly negatively charged systems (e.g., printing and dyeing wastewater, papermaking wastewater) and sludge conditioning
	Charge Density	Charge Density	1.0~8.0 meq/g (milliequivalents per gram)	Positively correlated with cationicity, directly affecting the adsorption capacity for negatively charged particles. The higher the charge density, the faster the charge neutralization rate
Molecular Structure	Molecular Weight	Molecular Weight	500,000~15,000,000 Da (Daltons)	Reflects the length of molecular chains, a key parameter: - Low molecular weight (500,000-800,000): Suitable for sludge dewatering (filter pressing/centrifugation) to form dense flocs; - High molecular weight (10,000,000-15,000,000): Suitable for wastewater clarification, forming large and loose flocs that facilitate sedimentation
	Hydrolysis Degree	Hydrolysis Degree	0%~10% (much lower than that of anionic polyacrylamide)	Refers to the proportion of amide groups (-CONH₂) hydrolyzed into carboxyl groups (-COOH). The hydrolysis degree of CPAM is usually low; excessively high hydrolysis degree will reduce cationicity and affect flocculation efficiency
Dissolution & Application	Dissolution Time	Dissolution Time	Granules/powder: 30~60 minutes; Emulsion-type: 5~15 minutes (25℃, stirring speed 300~500 rpm)	Dissolution time is affected by particle size, stirring intensity, and water temperature. Complete dissolution is required to avoid "fish eyes" (undissolved particles), otherwise the effect will be affected and equipment will be blocked
	Recommended Dissolution Concentration	Recommended Sol. Conc.	0.1%~0.5% (mass-volume ratio, i.e., 1~5g CPAM dissolved in 1L water)	Excessively high concentration tends to form viscous liquid, making dosing difficult; excessively low concentration requires larger dosing volume, increasing equipment load
	Applicable pH Range	pH Range	3~10 (Optimal: 6~8)	Stable under acidic or weakly alkaline conditions. Strong acidity (pH<3) will hinder the protonation of cationic groups, and strong alkalinity (pH>10) is prone to hydrolytic degradation
Application & Safety	Main Application Fields	Application Field	1. Municipal sludge dewatering (belt filter press, centrifugal dehydrator); 2. Industrial wastewater treatment (printing and dyeing, papermaking, chemical industry); 3. Papermaking retention and drainage aid; 4. Oilfield drilling fluid thickener	Different application scenarios require matching cationicity and molecular weight. For example, sludge dewatering prefers products with low to medium molecular weight and medium to high cationicity
	Toxicity Grade	Toxicity Grade	Low toxicity (LD₅₀ > 5000 mg/kg, oral administration in mice)	Harmless to humans under normal use, but inhalation of powder (which may irritate the respiratory tract) should be avoided. Rinse with clean water after skin contact
	Storage Life	Storage Life	Sealed, cool and dry place: Granules/powder 1~2 years; Emulsion-type 6~12 months	Emulsion-type products are prone to stratification due to excessively high temperature (>40℃) or poor sealing. Granules/powder are easy to agglomerate after absorbing moisture, affecting dissolution performance