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Polyacrylamide (Polyscrylamide) referred to as "PAM, commonly known as flocculating agent or flocculant, divided into cationic, anionic, and molecular weight between 400-18 million, product appearance for white or slightly yellow powder, liquid colorless viscous colloids, soluble in water, easy decomposition temperature over 120 ℃.
Polyacrylamide molecule with a positive group (CONH2), and dispersed in the solution of the suspended particle adsorption and bridging, has strong flocculation effect, so it is widely used in water treatment and metallurgy, paper making, petroleum, chemical, textile, dressing, etc.
Polyacrylamide is divided into: anionic, cationic and nonionic.
Anionic is mainly used for production water of life, industrial and urban sewage treatment. Is also suitable for preparation of alumina red mud in the process of flocculation precipitation and mud liquid separation. High molecular weight cationic, mainly for the water suspension flocculation precipitation and suspended material content, acidity and acid solution containing organic suspended muddy thing when flocculation is difficult. In this case, the cationic polyacrylamide flocculation precipitation, can effectively show its outstanding performance. 0.1-0.2% aqueous solution using form, must be prepared with Ph 7 or less water, after the match into a dilute solution easy to hydrolysis. Should be in English along with or used up in the day, should not be stored for a long time.
1. Advantages: PAM used for sewage treatment, for the organic matter removal efficiency, less dosage, the sedimentation speed, water cost is low, other flocculant is unable to substitute products.
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Anionic PAM quality indicators
Cationic PAM quality indicators
Metric names
indicators
Metric names
indicators
Solid content %
90 or more
Solid content %
90 or more
The molecular weight M
400-1000
The molecular weight M
800-2000
Single residue content %
3 or less
Hydrolysis degree of M
5-30
Water insolubles %
0.2 or less
Single residue content %
1 or less
The PH
10-12
Water insolubles %
0.2
Water soluble time h
1 to 2
Water soluble time h
2 or less
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