Introduction of non-ionic polyacrylamide

Nonionic polyacrylamide is a water-soluble polymer or polyelectrolyte.

Since its molecular chain contains a certain number of polar groups, it can form large flocs by adsorbing solid particles suspended in water, bridging between particles or making particles coalesce through charge neutralization.

Therefore, it can accelerate the settling of particles in suspension, and has a very obvious effect of accelerating solution clarification and promoting filtration.

It is mainly used for flocculation and sedimentation of various industrial wastewater and precipitation and clarification treatment.

Such as paper and pulp wastewater wastewater treatment, mineral processing and metal smelting process wastewater treatment, steel plant and stone processing plant wastewater treatment, etc.

1.Non-ionic polyacrylamide properties

Chemical Properties

Non-ionic polyacrylamide

Non-ionic polyacrylamide

PH (0.1%SOL) : 7.0 ~ 8.0

Ionicity : Non-ionic

Aqueous solution viscosity (0.1%SOL): 300 ~ 550( CPS)

Water content 10 % or less

Residual monomer (monomer) 0.2 % or less

Physical properties

The physical properties of non-ionic polyacrylamide are mainly determined by its behavior in aqueous solution. Since the molecular chain contains amide groups or ionic genes,

it is characterized by high hydrophilicity and can be dissolved in water in various proportions.

Other properties

Non-ionic polyacrylamide

1. Good water solubility, can be completely dissolved in cold water.

2、 Add a small amount of non-ionic polyacrylamide, you can receive great flocculation effect. Generally only 0.01~10ppm (0.01~10g/m3) need to be added to give full effect.

3、 Use non-ionic polyacrylamide and inorganic flocculant (polymeric ferric sulfate, polymeric aluminum chloride, iron salt, etc.) at the same time, it can show greater effect.

2. Non-ionic polyacrylamide reaction principle

The side groups on the molecular chain of non-ionic polyacrylamide are active amide groups, which can undergo a variety of chemical reactions to obtain a variety of derivatives,

but due to the proximity gene effect, the reaction is often not completely carried out.

Since non-ionic polyacrylamide (NPAM) is a polymer or polyelectrolyte, its molecular chain contains a certain amount of polar genes that can adsorb solid particles suspended in water and make the bridge between particles to form large flocs.

It accelerates the settling of particles in suspension, has a very obvious effect of speeding up the clarification of the solution and promoting filtration, etc.

3.Non-ionic polyacrylamide application areas

1、As flocculant, it is mainly used in industrial solid-liquid separation process, including sedimentation, clarification, concentration and sludge dewatering, etc.

The main industries where it is used are: urban sewage treatment, paper industry, food processing industry, petrochemical industry, metallurgical industry, mineral processing industry,

dyeing industry and sugar industry and various industrial wastewater treatment. It is used in sludge sedimentation and sludge dewatering in municipal wastewater, meat,

poultry and food processing wastewater treatment process.

Through its positively charged groups to electrically neutralize the negatively charged organic colloids in the sludge and the excellent bridging and coagulation function of the polymer, the colloidal particles gather into large flocs and are separated from their suspensions.

The effect is obvious and the dosage is small.

2, in the paper industry can be used as paper dry strength agent, retention aid, filter aid, can greatly improve the quality of paper, save costs, improve the production capacity of paper mills.

Directly with inorganic salt ions, fibers and other organic macromolecules electrostatic bridging effect to enhance the physical strength of paper, reduce the loss of fiber or filler,

accelerate water filtration, to enhance, retention, filtration, can also be used in the treatment of white water, at the same time, in the deinking process can play an obvious flocculation effect.

3、It can be used in fiber slurry (asbestos-cement products) to improve the drainage of asbestos-cement products and increase the strength of asbestos slab; in insulation board, it can improve the combination ability of additives and fibers.

4、It can be used as clarifying agent of mine wastewater and coal washing wastewater in mining and coal processing industry.

5、It can be used in the treatment of dyeing wastewater, leather wastewater and oily wastewater to remove turbidity and decolorize to reach the discharge standard.

6、In phosphoric acid purification, it helps to separate gypsum in the wet phosphoric acid process.

7、It is used as water treatment flocculant in water treatment plant with river water source.

4. Non-ionic polyacrylamide function

Non-ionic polyacrylamide has an extremely strong flocculation effect, due to its

1. clarifying and purifying effect.

2、 Settling promotion effect.

3、 Filtration promotion effect.

4、 Thickening effect and other effects.

In waste liquid treatment, sludge thickening and dewatering, mineral processing, coal washing, paper making, etc., it can fully meet the requirements of various fields.

5. Non-ionic polyacrylamide use method

1、 When using, prepare 0.1% concentration of aqueous solution, it is appropriate to use neutral water without salt debris.

2、 When dissolving, sprinkle the non-ionic polyacrylamide into the stirring water evenly, and control the stirring speed at 100~300rpm; add temperature (< 60°C) appropriately to accelerate the dissolution.

3、 Adjust the PH value of the treated liquid so that the non-ionic polyacrylamide can give full play to its effect (choose the best PH value and the dosage of non-ionic polyacrylamide by test.)

4、 When adding non-ionic polyacrylamide solution, accelerate the mixing with the treated liquid, after the flocs appear, slow down the stirring speed to facilitate the growth of flocs and accelerate the settling.

6. Non-ionic polyacrylamide precautions

1、 Operators should wear protective equipment, after skin contact, that is, wash with water.

2、 Use the site, often flush with water to prevent slipping and injury.

3、 Non-ionic polyacrylamide should be sealed and stored in a cool and dry place.

7. Main applications of non-ionic polyacrylamide

1、 It has special effect on organic colloidal suspended matter and can quickly promote sludge dewatering and filtration.

It can be used according to the nature of the dirt and the corresponding model, not sticky filter cloth when dewatering, not loose when pressing and filtering, high efficiency.

2、 Used in the treatment of organic sewage, such as electroplating, printing and dyeing, grease factory wastewater, alcohol, monosodium glutamate, sugar, meat products factory wastewater, and urban sewage.

3、 Used in paper making enhancement, improve the dry and wet strength of paper, such as adding PAM-CSG-1 products in the papermaking process, can make the wet paper tension increase 10-20 times, dry paper tension increase 50%, mainly used in kraft paper, map paper, advertising paper, photo paper.

4、 Used in oil field chemical auxiliaries.

5、 Used in textile sizing agent, stable pulp performance, less pulp drop, low fabric breakage, and smooth fabric surface.