环保型缓蚀阻垢剂的合成及其复配研究

Synthesis of Environmental Friendly Corrosion and Scale Inhibitor

以油酸与二乙烯三胺合成咪唑啉,用氯化苄将其季铵化为咪唑啉季铵盐(IM-L);以马来酸酐与氨水氨化聚合后采用氢氧化钠水解合成聚天冬氨酸钠(PASP)。以IM-L作为缓蚀剂的主剂,以PASP作为阻垢剂主剂,复配形成缓蚀阻垢剂。研究了马来酸酐与氨水反应的物料配比、聚合温度和水解时间对聚天冬氨酸钠阻垢性能的影响;并对IM-L、PASP与不同表面活性剂间的复配效果进行了研究。结果表明,PASP与葡萄糖酸钠协同效应明显,复配所得环保型缓蚀阻垢剂对CaCO3的阻垢率为91.0%、CaSO4的阻垢率为90.2%、BaSO4的阻垢率为74.2%,腐蚀速率为0.0738 mm/a。达到Q/SY 126-2014标准要求。

An imidazoline was synthesized from oleic acid and diethylenetriamine. Then the imidazoline was quaternized by benzyl chloride to form the imidazoline quaternary ammonium salt(IM-L). PASP was synthesized by ammoniating maleic anhydride with ammonia followed by hydrolysis using sodium hydroxide. IM-L was used as the main agent of corrosion inhibitor and PASP as the main agent of scale inhibitor to prepare the composite corrosion and scale inhibitor.The effects of mass ratio of maleic anhydride and ammonia, polymerization temperature and hydrolysis time on the scale inhibition performance of polyaspartic acid sodium were studied. The compounding effects of IM-L, PASP and different surfactants were studied. The results showed that the synergistic effect of PASP and sodium gluconate was obvious. The scale inhibition rate of CaCO3, CaSO4 and BaSO4 was 91.0%, 90.2% and 74.2% respectively, and the corrosion rate was 0.0738 mm/a. The results met the requirements of Q/SY 126-2014 standard.