Amphoteric polyacrylamide due to molecular containing cationic and anionic groups, hydrolytic copolymerization. The advantage is that it has the characteristics of common cationic flocculant. Used for strong acid leaching ore or recovery of valuable metals from acidic catalysts containing metals. Amphoteric ionic is not a mixture of anionic and cationic. If the use of cationic polyacrylamide and anionic polyacrylamide will react to produce precipitation. So amphoteric ion pro...