摘要：

以马来酸为主要单体合成了一种四元共聚物阻垢剂(MAM),用正交实验进行了合成条件的优化研究,确定了最优的合成条件:m(马来酸)∶m(AA)∶m(AMPS)∶m(AM)=5∶5∶4∶0.5,引发剂与单体的质量比为8%,4种单体的总质量分数为15%,反应温度为90℃,反应时间为4 h。研究了阻垢剂用量、溶液pH、钙离子浓度、硫酸根离子浓度、温度、恒温时间对该共聚物阻垢剂阻硫酸钙垢性能的影响,结果表明,在温度为70℃、溶液pH=7、ρ(Ca²⁺)=4000 mg/L、ρ(SO₄^2-)=7000 mg/L、ρ(NaCl)=7.5 g/L的条件下,当MAM投加量为3 mg/L、恒温时间为25 h时,阻垢率为98.58%。

关键词: 四元共聚物, 阻垢剂, 硫酸钙

Abstract:

The quadripolymer scale inhibitor(MAM) has been synthesized with maleic acid as main monomer.The synthetic conditions are optimized by orthogonal tests.The result proves that the optimum synthetic conditions of the quadripolymer are as follows:m(MA)∶m(AA)∶m(AMPS)∶m(AM)=5∶5∶4∶0.5,m〔(NH₄)₂S₂O₈〕∶m(MA+AA+AMPS+ AM)=8%,m(MA+AA+AMPS+AM)∶m(MA+AA+AMPS+AM+H₂O)=15%,reaction temperature at 90℃,and reaction time 4 h.The effects of scale inhibitor dosage,pH of the solution,calcium ion concentration,sulfate ion concentration,solution temperature and constant temperature time on the inhibition efficiency of calcium sulfate scale are evaluated.The result proves that the scale-inhibiting rate will be 98.58%,when the temperature is 70℃,ρ(Ca²⁺)=4000 mg/L,ρ(SO₄^2-)=7000 mg/L,ρ(NaCl)=7.5 g/L,and solution pH=7,and when the dosage of MAM is 3 mg/L,and constant temperature time is 25 h.

Key words: quadripolymer, scale inhibitor, calcium sulfate

中图分类号: 

• TQ317