(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；
3. 沈陽(yáng)工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，沈陽(yáng) 110870)
摘 要: 合成含對(duì)甲基苯基側(cè)鏈結(jié)構(gòu)的氧肟酸類(lèi)新型高效絮凝劑。首先以丙烯酰胺水溶液為連續(xù)相，以對(duì)甲基苯乙烯為分散相，在SPAN-60及TWEEN-80復(fù)合乳化劑作用下形成微乳液，在15~35 ℃下合成丙烯酰胺與對(duì)甲基苯乙烯的共聚物；然后采用程序控溫方式，在60~90 ℃下用硫酸羥胺將酰胺羥肟化得到所需產(chǎn)物。用紅外光譜、紫外光譜和DSC表征產(chǎn)物結(jié)構(gòu)，用黏度法測(cè)定產(chǎn)物的相對(duì)分子質(zhì)量。考察所合成聚合物的相對(duì)分子質(zhì)量及對(duì)甲基苯基含量對(duì)氧化鋁生產(chǎn)過(guò)程中赤泥礦漿沉降效果的影響。結(jié)果表明，氧肟酸類(lèi)絮凝劑中對(duì)甲基苯基質(zhì)量分?jǐn)?shù)為10.5%，相對(duì)分子質(zhì)量為1.1×107時(shí)，具有良好的沉降效果，并優(yōu)于現(xiàn)行使用的國(guó)內(nèi)外產(chǎn)品。
關(guān)鍵字: 對(duì)甲基苯乙烯；氧肟酸；丙烯酰胺；絮凝劑；赤泥；合成；性能
（1. School of Sciences, Northeastern University, Shenyang 110004, China;
2. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China;
3. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China）
Abstract:A new hydroxamic acid polymer containing p-tolyl as high efficiency flocculants was synthesized. Firstly, at 15−35 ℃, the copolymerization of acrylamide and (AM) p-methylphenylene was carried out in a microemulsion system, in which AM aqueous solution was the continue phase and p-methylphenylene was the dispersed phase using SPAN-60 and TWEEN-80 as surfactants, respectively. Polymers of hydroxamic functions were prepared with hydroxylamine salt at temperatures from 60 to 90 ℃ in the way of program control. The relative molecular mass was measured through the viscose method and the copolymer was characterized by FT-IR, UV and DSC. The effects of relative molecular mass of the copolymer and the content of the p-tolyl on red mud setting process in the production process of Al2O3 were studied. The results show that the new hydroxamic acid flocculants containing 10.5% p-tolyl with the relative molecular mass of 1.1×107 are more efficient in settlement effect than the hydroxamic acid flocculants that are widely used at present.
Key words: p-methypheaylene; hydroxamic acid; acrylamide; flocculant; red mud; synthesis; property
