膦酰基羧酸类共聚物阻垢剂的合成及其性能研究

发布时间：2018-03-23 20:28

  本文选题：亚磷酸　切入点：衣康酸　出处：《东北石油大学》2015年硕士论文

【摘要】：随着油藏开采规模的不断扩大,注水开采方式的持续进行,结垢问题是油田采出系统和集输系统普遍存在的问题,油田阻垢问题逐渐成为人们关注的焦点。目前加入阻垢剂是被采用最广泛、最经济、方便的方法。随着水处理技术的发展和人们环保意识的增强,研究开发无毒、无害符合绿色化学的原理和思路的新型阻垢剂,成为阻垢剂发展的新方向,且对油田开发具有重要意义。本文实验以水为溶剂,过硫酸铵为引发剂,以亚磷酸(H3PO3)、衣康酸(IA)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)为反应单体,通过自由基聚合方法合成了三元共聚物,以所合成产物对阻碳酸钙垢的能力(阻垢率)作为评价标准,考察了引发剂种类及用量、单体配比、反应温度、反应时间等因素对共聚物阻垢性能的影响并确定最佳合成条件。测定了共聚物的特性粘度,通过红外分析对共聚物的结构进行了表征。实验结果表明:所合成共聚物阻垢剂的最佳合成条件为单体配比为n亚磷酸:nA MPS:n衣康酸=5:1:5,引发剂占单体质量分数4.5%,反应温度80℃,反应时间2h;以其阻碳酸钙垢的能力和分散氧化铁的能力作为指标评价共聚物阻垢、分散性能的标准,当阻垢剂加剂量为50mg/L时,能达到的最佳阻垢率为96.19%,具有良好的阻碳酸钙垢性能,并且具有良好的热稳定性和耐钙盐性,分散氧化铁的透光率为52.6%,具有良好的分散性能。红外分析结果表明合成三元共聚物同时含有膦酰基、羧基和磺酸基。
[Abstract]:With the continuous expansion of reservoir production scale and the continuous development of water injection, scaling is a common problem in oil field production system and gathering and transportation system. The problem of scale inhibition in oil fields has gradually become the focus of attention. At present, adding scale inhibitor is the most widely used, most economical and convenient method. With the development of water treatment technology and the enhancement of people's awareness of environmental protection, research and development is non-toxic. The new scale inhibitor, which is harmless to the principle and thought of green chemistry, has become a new direction of scale inhibitor development and is of great significance to oilfield development. In this paper, water is used as solvent and ammonium persulfate as initiator. The ternary copolymers were synthesized by free radical polymerization with H3PO3Phosphite and AMPS as reactive monomers. The ability (scale inhibition rate) of the synthesized products to inhibit the scale of calcium carbonate was used as the evaluation criterion. The effects of initiator and amount of initiator, monomer ratio, reaction temperature, reaction time on the scale inhibition performance of the copolymer were investigated and the optimum synthetic conditions were determined. The intrinsic viscosity of the copolymer was determined. The structure of the copolymer was characterized by IR analysis. The results showed that the optimum synthesis conditions of the scale inhibitor were as follows: n: na MPS:n itaconic acid 5: 1: 5, initiator = 4.5 mass fraction of monomer, reaction temperature 80 鈩，

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