There are significant differences between polyacrylamide anions and cations in terms of production raw materials, appearance, molecular weight, indicators, uses, prices, and structural characteristics. The anionic type is mainly used as a flocculant and is suitable for inorganic wastewater treatment; the cationic type is mainly used for organic wastewater treatment, such as food plants, urban sewage, etc.The price of the cationic type is relatively high, and its production process is complex.The two have their own advantages in the application, and they need to be selected according to specific circumstances.

There are significant differences between polyacrylamide anions and cations in many aspects, as follows：

There are great differences between cationic polyacrylamide and anionic polyacrylamide in the production of raw materials and production processes. The main raw materials for anionic products are acrylamide, acrylic acid, sodium hydroxide, pure water, dispersants, initiators, etc.The main raw materials for the production of cationic polyacrylamide are acrylamide, DAC/DMC, pure water, dispersant, initiator, etc.In addition, there are the following differences：

Appearance: Although both have white particles and emulsion forms, the color of the emulsion is different.Anionic polyacrylamide emulsions are usually white, while cationic polyacrylamide emulsions are slightly blue.Polyacrylamide in solid form, anionic and cationic types are small white or yellowish particles in appearance, which are generally difficult to distinguish with the naked eye.

Molecular weight: The molecular weight of anionic polyacrylamide usually ranges from 4 million to 35 million, while the molecular weight of cationic polyacrylamide is generally between 7 million and 12 million, and there are also products with a molecular weight of about 15 million.Overall, the anionic type has a higher molecular weight.

Indicators: The main indicators of anionic polyacrylamide are molecular weight and degree of hydrolysis (the latest national standard GB/T 17514-2017 water treatment agent anionic and nonionic polyacrylamide national standard national standard inspection standards define the degree of hydrolysis as anionic degree), while the main indicators of cationic polyacrylamide are cationic degree and molecular weight.These indicators have an important impact on the performance and application of different types of polyacrylamide.