的合成及应用
(1. 东北大学 理学院，沈阳 110004；
2. 东北大学 材料与冶金学院，沈阳 110004)
摘 要: 采用微乳液聚合法合成了一种带有苯环结构的新型氧肟酸类赤泥絮凝剂。以丙烯酰胺水溶液为连续相，苯乙烯为分散相，ST-80为乳化剂制成微乳液，在15~35 ℃下合成丙烯酰胺与苯乙烯的共聚物，采用程序控温方式，在60~90 ℃下使用硫酸羟胺将共聚物羟肟化得到产物。研究了合成条件对产物结构的影响，采用红外光谱和紫外光谱对产物结构进行表征，并考察其在氧化铝生产过程中对赤泥的沉降效果。结果表明，带有苯环结构的氧肟酸类絮凝剂可以满足工业生产需要，且效果优于现行使用的国内外产品。
关键字: 丙烯酰胺；氧肟酸；苯乙烯；絮凝剂；沉降速度
high-molecular-mass hydroxamic acid
flocculant containing phenyl
（1. School of Sciences, Northeastern University,Shenyang 110004, China;
2. School of Materials and Metallurgy,Northeastern University, Shenyang 110004, China）
Abstract:A new high-molecular-mass hydroxamic acid containing phenyl(HHCP) as high efficiency flocculant was synthesized by microemulsion polymerication. At 15−35 ℃, copolymerization of acrylamide and styene was carried out in a microemulsion system, in which AM aqueous solution was the continuous phase and St was the dispersed phase using ST-80 as surfactants, respectively. Hydroxamic functions were prepared with hydroxylamine salt at temperatures from 60 ℃ to 90 ℃. The effect of reaction conditions on the structure was studied. The copolymer was characterized by FT-IR and UV, and the effect of copolymer on red mud setting process was tested. The results show that the new high-molecular-mass hydroxamic acid containing phenyl has better characteristic in setting velocity and clarity, and is more efficient than the hydroxamic acid flocculants, which are used widely at present.
Key words: acrylamide; hydroximic acid; styrene; flocculant; setting velocity
