- Product Name: Polyacrylamide
- Appearance: White Granular
- Type: Anionic, Cationic, Nonionic, Amphoteric
- Solid Content (%): ≥90
- CAS NO.: 9003-05-8
- MF: (C3H5NO)n
- HS Code: 39069010
Polyacrylamide (PAM) is a water-soluble polymer formed by the polymerization of acrylamide with the chemical formula (C₃H₅NO)ₙ. The appearance is white granules or powder. And it can be dissolved in water in any proportion, and the aqueous solution is a uniform, transparent liquid. Due to its good water solubility and chemical activity, PAM chemicals are known as “auxiliaries in various industries”, and have broad application prospects
As an important water-soluble high molecular polymer, PAM chemical can be widely used in many fields, such as water treatment, oil exploration, textile, papermaking, mineral processing, medicine, agriculture and other industries.
Introduction of Polyacrylamide (PAM)
According to the ionic characteristics, polyacrylamide (PAM) can be divided into four types, they are anionic, cationic, nonionic and amphoteric. The following are their detailed introduction and specifications of PAM chemical.
The molecular weight of anionic polymer flocculant is usually higher than that of cationic polymer or nonionic polymer, and its clarifying properties are mainly obtained by neutralization of charges. Its function is mainly to flocculate negatively charged colloids, with functions such as turbidity removal and decolorization, and is suitable for water treatment with high organic colloid content.
APAM anionic polyacrylamide can be widely used in waste water treatment of chemical industry, municipal sewage treatment, such as coal washing, mineral processing, metallurgy, iron and steel industry and electronic industry. Anionic polymers are used in the petroleum industry for enhanced oil recovery. In addition, it can also be used as papermaking auxiliary agent and textile pulping agent.
Cationic polyacrylamide is a linear high molecular polymer which is copolymerized by cationic monomer and acrylamide in different proportions by advanced polymerization technology. The cationic polymer has the characteristics of fast dissolution rate, narrow molecular weight distribution and small dosage.
CPAM is very efficient in usage and has high dehydration rate. Cationic polymer is used for the waste water treatment in alcohol factory, monosodium glutamate factory, sugar factory, beverage factory, tanneries, dyeing and other fields. It has a better effect to be used together with inorganic coagulant in particular. Besides, cationic polyacrylamide can be used as paper additives as well.
Nonionic polyacrylamide is a very effective flocculant and can be used for various types of sewage treatment. Its characteristics are: its flocculation performance is less affected by the pH value of wastewater and salts, and the flocculation strength is higher than that of anionic flocculants, especially in the treatment of acidic wastewater, the effect is better than that of anionic PAM. In addition, in the treatment of oily sewage in oil fields, it is usually used in combination with inorganic flocculants.
Amphoteric polyacrylamide is obtained by hydrolysis and copolymerization of vinyl amide and vinyl cationic monomer acrylamide monomer. But it is not a mixture of anionic and cationic types. If cationic polyacrylamide is used in combination with anionic polyacrylamide, the reaction will cause precipitation. Therefore, amphoteric PAM is an ideal product.
The amphoteric PAM molecules contain cationic groups and anionic groups, and have the characteristics of general cationic flocculants, so it will show more excellent performance. This flocculant can be used in a wide range of pH value, has high water filtration capacity and low moisture content of filter cake, and can also be used for strong acid leaching of ores or recovery of valuable metals in metal-containing acid catalysts.
1. Raw material preparation
- Main raw materials: acrylamide monomer (AM), and other modifiers that may be used to prepare anionic, cationic or non-ionic products, such as acrylic acid.
- Auxiliary materials: reaction solvent, reaction catalyst, ionizer, etc.
2. Polymerization reaction
- Aqueous solution polymerization reaction: dissolve acrylamide monomer and initiator (such as persulfate, azo compound, etc.) in water for polymerization reaction. This method is the main method for industrial production of PAM, which is simple, less environmentally polluting and has a high polymer yield.
- Polymerization conditions: accurately control parameters such as temperature, pressure, stirring speed and reaction time to ensure the smooth progress of the polymerization reaction.
3. Granulation treatment
After the polymerization is completed, the polymer solution is solidified into solid particles by gel cutting or spray drying to form a preliminary PAM product.
4. Drying and post-treatment
- The initially formed particles are dried at a specific temperature to remove excess water and improve the stability of the product.
- The dried particles are ground and screened to ensure uniform particle size to meet the particle size requirements of different application fields.
- For some products with special requirements, surface modification or graded screening may be required.
Item | Anionic Polyacrylamide (APAM) | Cationic Polyacrylamide (CPAM) | Nonionic Polyacrylamide (NPAM) |
Solid Content ,(%) | ≥90 | ≥90 | ≥89 |
Molecular Weight, (million) | 18-22 million | 8-12 million | 3-10 million |
Hydrolyzing degree ,(%) | 10~30 |
|
|
Ion degree, (%) |
| 10~60 | ≤5 |
Effective pH value | 7.0~14.0 | 1.0~14.0 | 1.0~8.0 |
Dissolving time(minutes) | ≤90 | 40~60 | ≤90 |
Packing | Net 25kg/paper bag with inner plastic bag | ||
Main Applications of Polyacrylamide (PAM)
- Water treatment. As a high-efficiency flocculant, pam flocculant plays a key role in sewage treatment and drinking water treatment, promoting the aggregation and sedimentation of suspended particles in water and improving the clarification effect. According to statistics, 37% of the global PAM production is used for wastewater treatment.
- Oil extraction. As a drilling fluid additive, PAM chemical can improve the stability of drilling fluid, reduce shale swelling, and increase recovery. At the same time, PAM also plays an important role in tertiary oil recovery technology.
- Papermaking industry. As a retention agent and enhancer, PAM polyacrylamide can improve the strength, stiffness and opacity of paper and reduce the loss of fibers and other fillers. (18% of the global PAM production is used in the papermaking industry.)
- Textile and printing and dyeing. The PAM powder is used as a sizing agent to improve the wear resistance, wrinkle resistance and feel of textiles; as a dyeing auxiliary, it improves the color fixation effect of dyes and reduces losses during the dyeing process.
- Mining and coal washing. As a flocculant, PAM helps separate minerals and impurities and improves the recovery rate of minerals. In coal washing operations, it can accelerate the sedimentation of coal slime and improve the efficiency and quality of coal washing.
- Agriculture. As a soil structure improver, polyacrylamide can increase soil water retention and air permeability, reduce soil erosion, and promote crop growth.
- Other applications. PAM also has special applications in the pharmaceutical, construction, mineral processing, leather, battery manufacturing and other industries
Main Features of PAM Chemical
- Adjustable molecular weight. The molecular weight of PAM polyacrylamide can be adjusted according to different needs to meet the specific needs of different industries and working conditions.
- Excellent flocculation. PAM has good flocculation, which can reduce the friction resistance between liquids and improve processing efficiency.
- Good thermal stability. The PAM chemical has good thermal stability within a certain temperature range and is suitable for process operations under various temperature conditions.
- Strong solubility. PAM powder can be dissolved in water in any proportion, and the aqueous solution is a uniform and transparent liquid, which is easy to handle and apply.
Why Choose Fengbai
- Fengbai has more than 15+ years of experience in exporting polyacrylamide pam chemical.
- We have our own factory and raw materials, large warehouse, the advanced production lines and technology.
- Quality certifications: ISO 9001:2015, SGS, HACCP, KOSHER, HALAL, etc.
- Fengbai can provide high-quality products, competitive prices and good services for you.