Polyacrylamide

Product Details

CasNo： 25085-02-3

MF： (C3H5NO.C3H4O2.Na)x

Appearance： powder

Delivery Time： 15 days

Packing： 25kg/bag

Purity： 99%

1. Basic Information

• English Name: Polyacrylamide
• Abbreviation: PAM
• CAS No.:25085-02-3
• Molecular Formula: (C₃H₅NO)n
• Molecular Weight: Ranging from 500,000 to 30,000,000

2. Physical and Chemical Properties

• Appearance: Usually presented as white granules or powder.
• Density: Approximately 1.3g/cm³.
• Solubility: Highly soluble in water. It can dissolve in water at any ratio, forming a transparent and homogeneous solution. However, it is insoluble in most organic solvents such as benzene, ether, and lipids.
• Stability: In dry powder form, PAM is relatively stable. But high - temperature (above 120°C) and high - humidity environments may affect its performance, causing possible decomposition or a decrease in molecular weight over time.

3. Product Classification and Applications

3.1 Anionic Polyacrylamide (APAM)

• Nature: An organic high - molecular polymer with polar groups.
• Applications
  • Wastewater Treatment: It is highly effective in treating industrial wastewaters with high - concentration suspended particles that are positively charged and a neutral or alkaline pH. Examples include wastewater from steel plants, electroplating factories, and metallurgical and coal - washing industries. APAM helps in sludge dewatering, clarification, sedimentation, and filtration promotion. In the process of sludge dewatering, it can form large flocs, making the sludge easier to separate from water, and reducing the moisture content of the sludge cake.
  • Oil Industry: In the oil industry, it is used for enhanced oil recovery. By adjusting the viscosity of the injected water, it improves the sweep efficiency and oil displacement efficiency.
  • River Dredging and Mineral Processing: In river dredging projects, it helps in separating the sediment from water, making the water clearer. In mineral processing, it can enhance the separation of valuable minerals from gangue by promoting the aggregation of fine particles.

3.2 Cationic Polyacrylamide (CPAM)

• Nature: A linear high - molecular - weight compound.
• Applications
  • Wastewater Treatment in Organic - rich Industries: Ideal for treating industrial wastewaters with high organic colloid content, such as those from the dyeing, papermaking, and food industries. It is especially suitable for urban sewage and sludge dewatering. For example, in the paper - making industry, it can effectively remove the organic pollutants in wastewater, and in sludge dewatering, it can significantly reduce the moisture content of the sludge, making the disposal of sludge more convenient.
  • Paper - making Industry: As a paper - making additive, it can improve the retention rate of fillers and pigments in the paper - making process, enhance the strength of the paper, and also contribute to the dewatering of the paper pulp, improving the production efficiency.
  • Oilfield Chemical Auxiliaries: Used as clay anti - swelling agents and thickeners in oilfield acidizing operations. In oilfields, it can prevent the swelling of clay minerals in the reservoir, maintaining the permeability of the reservoir, and in acidizing operations, it can thicken the acid solution, improving the acidizing effect.

3.3 Non - ionic Polyacrylamide (NPAM)

• Nature: A linear high - molecular compound.
• Applications
  • Wastewater Treatment: When the suspended sewage is acidic, NPAM is a suitable flocculant. It uses the adsorption - bridging effect of its long molecular chain to make suspended particles coagulate and precipitate, achieving water purification. It is also often used in combination with inorganic flocculants in water treatment to enhance the treatment effect.
  • Textile Industry: As a textile auxiliary, when combined with other chemicals, it can be made into a chemical slurry for textile sizing. This improves the adhesion, permeability, and desizing performance of the slurry, gives the fabric anti - static properties, reduces the sizing rate, and minimizes twisting spots.
  • Soil - related Applications: It can be used as a soil conditioner. When dissolved into a 0.3% concentration and added with a cross - linker, and then sprayed on the desert, it can play a role in sand prevention and fixation. In agriculture, it can also be used as a soil moisture - retaining agent, helping the soil retain moisture and improve soil structure.

3.4 Amphoteric Polyacrylamide (AM - PAM)

• Nature: A PAM product with both cationic and anionic active groups, obtained through hydrolysis and copolymerization.
• Applications
  • Oilfield Profile Control and Water Shutoff: It can form a gel - like substance in combination with cross - linkers, stabilizers, and accelerators. This gel can effectively block the pores and fractures in the reservoir, adjusting the fluid flow profile in the reservoir and improving the oil recovery rate.
  • Complex Wastewater Treatment: Suitable for treating various complex wastewaters containing both organic and inorganic pollutants, as well as those with variable pH values. It can adapt to different wastewater conditions and achieve good treatment effects.
  • Sludge Dewatering and Paper - making Additives: In sludge dewatering, it can achieve a higher filtration rate and lower moisture content of the sludge cake compared to single - charge PAM. In the paper - making industry, it can improve the quality of paper and the retention rate of fillers.

4. Technical Indicators

• Appearance: White granules.
• Solid Content: Generally, ≥88%.
• Molecular Weight: Varies according to different types. For anionic types, it is usually in the range of 6,000,000 - 25,000,000; for cationic types, 6,000,000 - 12,000,000; for non - ionic types, 2,000,000 - 12,000,000; and for amphoteric types, 8,000,000 - 10,000,000.
• Dissolution Time: Usually ≤60 minutes.

5. Packaging and Storage

5.1 Packaging

• Solid products are packed in polypropylene woven bags, with a plastic inner bag to prevent moisture absorption. Each bag typically contains 25 kg of the product.
• Colloidal products are packaged in plastic barrels, also with a plastic inner bag. Common barrel sizes are 50 kg or 200 kg.

5.2 Storage Conditions

• PAM has hygroscopic properties. It should be hermetically stored in a cool and dry warehouse, with the temperature kept below 35°C to avoid performance degradation due to high temperature and humidity.
• Care should be taken to prevent the product from being scattered on the ground. If it gets wet, it may cause the ground to become slippery, and the product may also be contaminated and its quality affected.