一种曼尼希碱型盐酸酸化缓蚀剂的研制

利用环己胺研制了一种低成本的曼尼希碱.该曼尼希碱具有良好的缓蚀性能,可用作油气井酸化缓蚀剂的主剂.以静态腐蚀速率为试验评价指标,对原料酮、甲醛的类型进行了筛选,并研究了反应温度、反应时间、反应体系的pH值等因素对反应产物缓蚀性能的影响,对主剂合成工艺条件进行优化,总结了最佳合成工艺条件.测试了该缓蚀剂在不同浓度下对N-80钢的缓蚀性能,初步地探讨了主剂与增效剂之间的协同效应.腐蚀试验表明,在60℃,20%的工业盐酸中只需加入0.5%,即可满足石油天然气行业标准中酸化缓蚀剂一级品的要求.

Study and development of a Mannich based corrosion inhibitor for hydrochloric acid acidifying

Mannich base is a kind of excellent corrosion inhibitors,and they are widely applied in the acidifying operations of oil-gas wells.A low-cost Mannich base is developed using cyclohexylamine as raw material.It may be used as the main agent for the oil or gas well acidifying corrosion inhibitor.Taking the static corrosion rate as the experimental appraisal target,the types of raw material are selected,and the influences of reaction temperature,reaction time,reaction system pH on the corrosion inhibiting performance of the products are studied.The synthesis technological conditions of the main agent of acidifying corrosion inhibitor are optimized,and the optimal synthesis technological conditions are obtained.The corrosion inhibiting performance of the synthesized corrosion inhibitor of different concentrations to N-80 steel is tested,and the coordinative effect of the main agent with synergists is discussed.The test result shows that,the first-grade corrosion inhibitor in petroleum and natural gas industry standards can be gained by adding the synthesized corrosion inhibitor of 0.5% into the industrial hydrochloric acid of 20% at 60 ℃.