MA-AA-MAC对硫酸钡垢阻垢机理研究  

Study of Scale-inhibiting Mechanism of MA-AA-MAC Copolymer on BaSO_4 Scale

作　　者：杨耀东[1] 唐善法[2] 王晓杰[2] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]长江大学石油工程学院,荆州434023

出　　处：《精细石油化工进展》2012年第1期27-30,共4页Advances in Fine Petrochemicals

摘　　要：测定不同浓度马来酸酐(MA)、丙烯酸(AA)、丙烯酸甲酯(MAC)三元共聚物在硫酸钡过饱和溶液的电导率,分析其对硫酸钡结晶动力学的影响。研究结果显示,硫酸钡结晶表面自由能与硫酸钡过饱和溶液的诱导时间均随着MA-AA-MAC浓度的增加而增加,而硫酸钡晶体的生长速率随MA-AA-MAC浓度的增加而下降。这说明三元共聚物阻垢机理主要是由于阻垢剂对硫酸钡晶种表面具有Langmuir等温单分子吸附作用,阻垢剂通过吸附于微晶表面的活性增长点阻止微晶的继续生长,从而达到阻垢目的。The conductivity of BaSO4 supersaturated solution containing different contents of MA AA MAC was determined. The effects of the above copolymer on the kinetics of BaSO4 crystallization were analyzed. The result showed that the surface free energy of barium sulfate crystals and the induction time of barium sulfate supersaturated solution increased with the increase of concentration of MA AA MAC. Growth rate of BaSQ crystals decreased with the increase of concentration of MA AA MAC. Therefore,the possible in hibition mechanism is that the scale inhibitor was adsorbed on the surface of BaSO4 crystals according the Langmuir model which was the single molecule layer sorption. The scale was effectively inhibited by the ad sorption of MA AA MAC as inhibitor on the active site of crystal surfaces to inhibit the growth of BaSO4 crystals.

关 键 词：电导率 硫酸钡 结晶动力学 MA-AA-MAC 阻垢剂 

分 类 号：TQ085.4[化学工程]