硫酸钡阻垢剂的合成及其性能  

Synthesis and Performance Evaluation of Scale Inhibitor for Barium Sulfate

作　　者：李建波[1] 唐明进 张莉梅[1] 陈龙利[1] 方钫[1] 

机构地区：[1]西南石油大学化学化工学院,四川成都610500

出　　处：《石油化工》2015年第12期1492-1498,共7页Petrochemical Technology

摘　　要：以衣康酸（IA）、马来酸酐（MA）、2-丙烯酰胺基－2－甲基丙磺酸（AMPS）为单体、（NH4）2S2O8-NaHSO3为氧化．还原引发剂，采用水溶液聚合法得到IA／MA／AMPS三元共聚物（PIMA）。利用IR，1HNMR，SEM等方法分析了PIMA的结构、确定了合成PIMA适宜的反应条件、考察了PIMA对BaSO4垢的阻垢能力及分散能力并探讨了PIMA的防垢机理。表征结果显示，合成的PIMA为目标聚合物，黏均相对分子质量约为4900。实验结果表明，合成PIMA适宜的反应条件为：反应温度65℃，单体用量25％（W）（基于反应体系），引发剂用量为1．0％（w）（基于反应体系），体系pH=9～10；当PIMA用量为100mg／L时，PIMA对BaSO4的阻垢能力和分散能力效果较好，阻垢率为88．7％，悬浮率大于80．O％。PIMA阻垢剂的作用机理主要包括络合作用、晶格畸变作用和吸附分散作用。A terpolymer, poly（IA/MA/AMPS）（PIMA） was synthesized from itaconic acid（IA）, maleic anhydride（MA） and 2-acrylamido-2-methyl propane sulfonic acid（AMPS） with （NH4）2S2O8- NaHSO3 redox initiator system by aqueous solution radical polymerization. The product PIMA was characterized by means of IR, 1H NMR and SEM. Its structure, optimal synthesizing conditions, scale inhibition and dispersibility to BaSO4 were investigated. The results verified the structure of the target polymer PIMA and its relative viscosity-average molecular weight was about 4 900. The experimental results indicated that the optimal synthesizing conditions for PIMA were reaction temperature 65 ℃, monomer dosage 25%（w）（based on the reaction system）, initiator dosage 1.0%（w） and system pH 9-10. When the PIMA dosage was 100 mg/L, the inhibition rate and dispersion rate of PIMA to BaSO4 were 88.7% and 80.0%, respectively. The mechanisms of the PIMA scale inhibition mainly include complexation, lattice distortion and adsorption-dispersion.

关 键 词：硫酸钡垢 阻垢剂 三元共聚物 分散性 悬浮率 

分 类 号：TQ317[化学工程—高聚物工业]