Preparation of high molecular weight anion polyacrylamide

Production of anionic polyacrylamide with high molecular weight is carried out by adding into 15-26% hydrolytic reagent sodium carbonate, multiple initiating agent with oxidant, reducer, ammonia water and water soluble azo initiating agent, oxidant is sulfate with 0.0001-0.5%, reducer is sulfite, sodium sulfite, ammonium sulfite, potassium sulfite, sodium bisulfite, offset sodium sulfite, offset potassium sulfite with 0.0005-0.25%, or it is organic amine, such as ethylenediamine, diethylamine, triethylamine, aminoethyl alcohol, pyridine, 4-cyano pyridine with 0.01-1.0%, water soluble azo initiating agent is 2,2,-azodi(2-methyl propyl ether)dimuriate, 4,4,-azodi(4-cyano pentanoic acid) with 0.001-0.5%, ammonia water with 0.005-0.20%, chain transfer agent is beta-dimethybutylcyan with 0.005-0.20%, initiating temperature is 5-25 Deg C., thermal insulating polymerizing for 2-6hrs, hydrolyzing for 3-5hrs, granulating, drying and breaking to obtain product with molecular weight>2000 million. It achieves better solubility and less insolubles.