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1. Product Overview
Polyacrylamide abbreviation (amide)
polyacrylamide (PAM)
Pure white particles
Polyacrylamide, referred to as PAM, is divided into anionic (APAM), cationic (CPAM), and nonionic (NPAM). It is a linear polymer and one of the most widely used varieties of water-soluble polymer compounds. Polyacrylamide and its derivatives can be used as effective flocculants, thickeners, paper enhancers and liquid drag reducing agents, etc., and are widely used in water treatment, papermaking, petroleum, coal, mining and metallurgy, geology, textiles, construction, etc. industrial sector.

3. Precautions for selecting polyacrylamide products:
① The selection of flocculant takes full consideration of the process and equipment requirements.

②The strength of the floc can be increased by increasing the molecular weight of the flocculant.

③The charge value of the flocculant is screened through experiments.

④Climate change (temperature) affects the selection of flocculant.

⑤Select the molecular weight of the flocculant according to the floc size required by the treatment process.

⑥Mix the flocculant and sludge thoroughly before treatment.
4. Performance characteristics:

1. The polyacrylamide molecule has positive genes, strong flocculation ability, low dosage, and obvious treatment effect.

2. It has good solubility and high activity. The alum flowers formed by condensation in the water body are large and settle quickly. It has a purification capacity 2-3 times greater than other water-soluble polymers.

3. Strong adaptability and little impact on the pH value and temperature of the water body. After purification of the raw water, it reaches the national water reference standard. After treatment, the suspended particles in the water achieve the purpose of flocculation and clarification, which is conducive to ion exchange treatment and the preparation of high-purity water.

4. It is less corrosive and easy to operate, which can improve the labor intensity and working conditions of the dosing process.

5. Application scope of polyacrylamide

The polyacrylamide molecule has a positive gene (-CONH2), which can adsorb and bridge suspended particles dispersed in the solution. It has a strong flocculation effect. It can accelerate the settlement of particles in the suspension, and has a very obvious acceleration of the solution. It can clarify and promote filtration, so it is widely used in water treatment, electric power, mining, coal preparation, asbestos products, petrochemical industry, papermaking, textile, sugar refining, medicine, environmental protection, etc.
1. As a flocculant, it is mainly used in industrial solid-liquid separation processes, including sedimentation, clarification, concentration and sludge dehydration. The main industries used are: urban sewage treatment, paper industry, food processing industry, petrochemical industry, Wastewater treatment in metallurgical industry, mineral processing industry, dyeing industry, sugar industry and various industries. It is used for sludge sedimentation and sludge dehydration in the treatment of urban sewage and meat, poultry, and food processing wastewater. The positively charged groups it contains electrically neutralize the negatively charged organic colloids in the sludge and The bridging and cohesion function of polymers promotes the colloidal particles to aggregate into large flocs and separate from their suspension. The effect is obvious and the dosage is small.
2. In the paper industry, it can be used as paper dry strength agent, retention aid and filter aid, which can improve paper quality, save costs and increase the production capacity of paper mills. It can directly form electrostatic bridges with inorganic salt ions, fibers and other organic polymers to enhance the physical strength of paper, reduce the loss of fibers or fillers, speed up water filtration, and play the role of reinforcement, retention and filtration aid. It can also be used for White water treatment, at the same time, can have obvious flocculation effect during the deinking process.
3. Fiber slurry (asbestos-cement products) can improve the drainage of formed asbestos-cement products and increase the strength of asbestos board blanks; in insulation boards, it can improve the binding ability of additives and fibers.
4. It can be used as a clarifier for mine wastewater and coal washing wastewater in the mining and coal preparation industries.
5. It can be used to treat dyeing wastewater, leather wastewater, and oily wastewater to remove turbidity and decolorize them to meet discharge standards.
6. In phosphoric acid purification, it helps to separate gypsum in wet phosphoric acid process.
7. Used as water treatment flocculant in water plants with river water source.
6. Usage methods and precautions:
1. Use neutral, salt-free water to prepare an aqueous solution with a concentration of 0.2%.
2. Since this product is suitable for a wide range of water pH values, the general dosage is 0.1-10ppm (0.1-10mg/L).
3. Fully dissolved. When dissolving, stir the water thoroughly and then add the medicinal powder slowly and evenly to prevent blockage of pipes and pumps caused by large flocculation and fish eyes.
4. The mixing speed is generally 200 rpm and the time is not less than 60 minutes. Appropriately increasing the water temperature by 20-30 degrees Celsius can accelerate dissolution. The maximum temperature of the liquid medicine should be less than 60 degrees.
5. Determine the optimal dosage. Determine the optimal dosage through experiments before use. Because the dosage is too low, it will not work, and if the dosage is too high, it will have the opposite effect. When it exceeds a certain concentration, PAM not only does not flocculate, but is dispersed and used stably.
6. This product should be stored in a cool, dry place to prevent moisture.
7. The work site should be flushed with water frequently to keep it clean. Because of its high viscosity, PAM scattered underground becomes smooth when exposed to water, preventing operators from slipping and causing safety accidents.
8. This product is lined with plastic bags and the outer layer is made of plastic laminated woven bags, each bag is 25Kg.
7. Physical properties and usage characteristics
1. Physical properties: Molecular formula (CH2CHCONH2)r
PAM is a linear polymer. It is easily soluble in water and almost insoluble in benzene, ethylbenzene, esters, acetone and other general organic solvents. Its aqueous solution is an almost transparent viscous liquid and is a non-dangerous product. Non-corrosive, solid PAM is hygroscopic, and the hygroscopicity increases with the increase of ionicity. PAM has good thermal stability; it has good stability when heated to 100°C, but it easily decomposes to produce nitrogen gas when heated to 150°C or above. It undergoes imidization and is insoluble in water. Density (g) ml 23°C 1.302. The glass transition temperature is 153°C. PAM exhibits non-Newtonian fluidity under stress.
2. Usage characteristics
Flocculation: PAM can neutralize suspended substances through electricity, bridge adsorption, and perform flocculation.
Adhesion: It can act as an adhesive through mechanical, physical and chemical effects.
Resistance reduction: PAM can effectively reduce the frictional resistance of fluids. Adding a small amount of PAM to water can reduce the frictional resistance by 50-80%.
Thickening: PAM has a thickening effect under both neutral and acidic conditions. When the pH value is above 10°C, PAM is easily hydrolyzed and has a semi-reticular structure, and the thickening will be more obvious.
8. Synthesis and process of polyacrylamide PAM
9. Packaging and storage precautions:
For this product, be sure to protect it from moisture, rain, and sunlight.
Storage period: 2 years, 25kg paper bag (plastic bag lined with plastic kraft paper bag outside).