Research On The Synthesis And Solution Properties Of Ultra High Molecular Weight Polyacrylamide

This paper mainly studied the ultra-high molecular weight polyacrylamide,developed by the degree of bifunctional initiator of compound AM polymerization byREDOX initiator system, optimize the polymerization process conditions for: AMconcentration30%,10mg/L degree of bifunctional initiator concentration,polymerization temperature is6℃, dosage of azo compound25mg/L, dosage ofEDTA60mg/L, dosage of sodium formate5mg/L, urea dose of400mg/L. Tooptimize the polymerization process conditions has good reproducibility, PAMaverage relative molecular mass is as high as3.0x107. By microwave hydrolysisprocess, hydrolysis was carried out on the synthesis of PAM, the optimal hydrolysisconditions for: PAM concentration15%, the output power of420w microwavereactor, hydrolysis time8min, dosage of cosolvent NP-10100mg/L. To optimizethe hydrolysis process conditions with good reproducibility, relative molecular qualityof HPAM is as high as3.3x107, degree of hydrolysis reached the designrequirements. The concentration of800mg/L synthesis of HPAM on artificialheterogeneous core flooding performance evaluation, this research in the synthesis ofHPAM recovery efficiency can be improved by more than15%, with the sameconditions of domestic HPAM (DQ2500) compared to increase recovery efficiencyreaches5%.Determined by condition of experiment, the synthesis of ultra high molecularweight cationic polyacrylamide, the optimal process parameters for: the initiatorconcentration60mg/L (on) monomer, monomer concentration was20%, the pH valueof8, cause the temperature of10℃, DA concentration of600mg/L, the ureaconcentration of100mg/L, EDTA concentration of100mg/L, the Span of20concentration of100mg/L, AIBN concentration of80mg/L. On synthesis of ultrahigh molecular weight cationic flocculants CPAM (AETMAC-AM) flocculationevaluation test results show that the flocculation effect is significantly better than thecurrent domestic cationic polyacrylamide flocculants are widely used, and it has bettereffect to use compound with inorganic flocculant.