What is the difference between anionic polyacrylamide and cationic polyacrylamide?

What is the difference between anionic polyacrylamide and cationic polyacrylamide?

Nonionic polyacrylamide Uses:

Sewage treatment agent: When the suspended sewage is acidic, it is more appropriate to use non-ionic polyacrylamide as a flocculant. This is the role of PAM in adsorption and bridging, so that suspended particles can flocculate and precipitate to achieve the purpose of purifying sewage. It can also be used It is used in the purification of tap water, especially when used in combination with inorganic flocculants. It has the best effect in water treatment. Additives for textile industry: Add some chemicals to make chemical materials for textile sizing. Sand control and sand fixation: combine non-ionic polymer Dissolve acrylamide at a concentration of 0.3% and add a cross-linking agent, and spray it on the desert to prevent and fix sand. Soil moisturizing agent: used as a basic raw material for soil moisturizing agent and various modified polyacrylamides.

Cationic polyacrylamide uses:

Sludge dewatering: According to the nature of the sewage, the corresponding brand of this product can be selected, which can effectively carry out gravity sludge dewatering before the sludge enters the filter press.

During dehydration, large flocs will be produced, which will not stick to the filter cloth and will not disperse during press filtration. The dosage is small, the dehydration efficiency is high, and the moisture content of the mud cake is below 80%. All alkaline media are positively charged, so it is extremely effective to flocculate and settle negatively charged sewage suspended particles in sewage, such as alcohol factory wastewater, brewery wastewater, monosodium glutamate factory wastewater, sugar factory wastewater, meat food Factory wastewater, beverage factory wastewater, textile printing and dyeing factory wastewater, etc., the effect of using cationic polyacrylamide is several times or dozens of times higher than that of anionic polyacrylamide, nonionic polyacrylamide or inorganic salts, because this type of wastewater is common with a negative charge.

Water treatment flocculants in waterworks:

This product has the characteristics of less dosage, good effect, and low cost. It is better to use it in combination with inorganic flocculants.

Oilfield Chemicals:

Such as clay anti-swelling agent, thickener for oilfield acidification, etc.

Paper-making additives: Cationic PAM paper strengthening agent is a water-soluble cationic polymer containing carbamoyl groups, which has the functions of strengthening, retention and drainage, and can effectively improve the strength of paper. At the same time, the product is also an efficient dispersant.

Anionic polyacrylamide uses:

Industrial wastewater treatment: For suspended particles, relatively high concentration, positively charged particles, neutral or alkaline pH value of water, steel factory wastewater, electroplating factory wastewater, metallurgical wastewater, coal washing wastewater and other sewage treatment, the effect most.

Drinking water treatment:

The water sources of many waterworks in my country come from rivers, which are high in sediment and mineral content and relatively turbid. Although they have been filtered through sedimentation, they still cannot meet the requirements. It is necessary to add flocculants. The dosage is 1/50 of inorganic flocculants, but the effect It is several times that of inorganic flocculants. For river water with serious organic pollution, inorganic flocculants can be used in combination with our company's cationic polyacrylamide for better results.

Recycling of lost starch distiller's grains in starch factories and alcohol factories:

Now the waste water of many starch factories contains a lot of starch. Anionic polyacrylamide is now added to make the starch particles flocculate and precipitate, and then the sediment is filtered by a filter press into a cake shape, which can be used as feed, and alcohol from alcohol factories can also be used It is dehydrated by anionic polyacrylamide and recovered by pressure filtration.