Brief introduction of polyacrylamide industry application

DATE:2017-10-20 / READ:

Polyacrylamide (Polyacrylamide, PAM) is a general term of acrylamide and its derivatives homopolymer and copolymer. The molecular weight of polyacrylamide is low, medium, high and ultra high, generally speaking, below 10 million is low molecular weight, 10 million -1500 million is low molecular weight, more than 18 million high molecular weight. Therefore, high molecular weight polyacrylamide is an organic polymer with molecular weight above 18 million. According to the molecular chain of PAM functional group dissociation properties in aqueous solution, can be divided into anionic (CPAM), cationic (APAM), non-ionic and zwitterionic (NPAM) cation in several varieties, is not suitable for use in water supply and drainage engineering, so we come into contact with the water treatment agent is polyacrylamide anionic or nonionic. According to molecular weight polyacrylamide products, there are two kinds of colloid powder and powder products, is white or yellowish powder, solid content is above 90%, the colloid product is a colorless yellowish transparent colloid, solid content of 8% to 9%.

The characteristics of high molecular weight anionic polyacrylamide, high molecular weight polyacrylamide containing amide, the structure unit is easy to form hydrogen bonds, so that it has good water solubility and high chemical activity, can be a variety of derivatives by grafting and crosslinking. High molecular weight polyacrylamide (PAM) is an organic polymer made from acrylamide monomer. It is colorless, odorless, odorless, soluble in water, and has no corrosiveness. High molecular weight polyacrylamide at room temperature is relatively stable, high temperature and frozen easily degradable, so its storage and preparation of overtime, the temperature should be controlled at 2 ~ 55 degrees centigrade.

Cationic polyacrylamide flocculant has been widely used in sludge dewatering, industrial wastewater treatment and municipal wastewater treatment. At present, the use of cationic polyacrylamide flocculant in the United States, Japan and European countries has occupied 75% ~ 80% of the total amount of flocculant. In recent years, the market demand of cationic polyacrylamide flocculants has been increasing in China, but most of them are limited to sewage and sludge treatment.

AUTHOR:ATZ Environmental Protection Technology

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