的合成及應(yīng)用
(1. 東北大學(xué) 理學(xué)院，沈陽(yáng) 110004；
2. 東北大學(xué) 材料與冶金學(xué)院，沈陽(yáng) 110004)
摘 要: 采用微乳液聚合法合成了一種帶有苯環(huán)結(jié)構(gòu)的新型氧肟酸類(lèi)赤泥絮凝劑。以丙烯酰胺水溶液為連續(xù)相，苯乙烯為分散相，ST-80為乳化劑制成微乳液，在15~35 ℃下合成丙烯酰胺與苯乙烯的共聚物，采用程序控溫方式，在60~90 ℃下使用硫酸羥胺將共聚物羥肟化得到產(chǎn)物。研究了合成條件對(duì)產(chǎn)物結(jié)構(gòu)的影響，采用紅外光譜和紫外光譜對(duì)產(chǎn)物結(jié)構(gòu)進(jìn)行表征，并考察其在氧化鋁生產(chǎn)過(guò)程中對(duì)赤泥的沉降效果。結(jié)果表明，帶有苯環(huán)結(jié)構(gòu)的氧肟酸類(lèi)絮凝劑可以滿足工業(yè)生產(chǎn)需要，且效果優(yōu)于現(xiàn)行使用的國(guó)內(nèi)外產(chǎn)品。
關(guān)鍵字: 丙烯酰胺；氧肟酸；苯乙烯；絮凝劑；沉降速度
high-molecular-mass hydroxamic acid
flocculant containing phenyl
XIE Zhi-hui1, JIA Zhi-jun1
（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
