中南大学学报（自然科学版）2017，Vol.48Issue(2)：295-301,7.DOI:10.11817/j.issn.1672-7207.2017.02.004
赤泥沉降用新型氧肟酸絮凝剂的合成与应用
Preparation of new hydroxamic acid flocculant and application for red mud settlement
摘要
Abstract
Using polyacrylamide hydrogel as the starting material, hydroxylamine hydrochloride and sodium hydroxide as modified reagent for hydrolyzing and oximation respectively, a new hydroxamic acid flocculant was prepared by the method of two-stage temperature control technology. Evaluated by the ferric chloride adsorption coloration, FT-IR and red mud flocculation performance of the product, optimum conditions were obtained. The results show that polyacrylamide concentration is 8%, pH of hydroxylamine alkali solution is 13.5, and no alkali is supplied.The molar ratio of hydroxylamine amide and hydroxamation is 1:1, at 60℃ for 3 h hydrolyzing and at 85℃ for 2 h, strong ferric chloride adsorption coloration and FT-IR were studied. Some hydroxamic and carboxylate functional groups were achieved in the polymer. The results show that compared with the performance of some commercial flocculants in the alumina industry, hydroxamic acid flocculant exhibits significant improvement of performance in the red mud flocculation, the settlement rate is 11.5 m/h, and the clarity of supernatant(absorbance) is 0.639.关键词
氧肟酸/聚丙烯酰胺/改性/絮凝剂/赤泥沉降Key words
hydroxamic acid/polyacrylamide/modified/flocculant/red mud settling分类
矿业与冶金引用本文复制引用
梁高杰,陈文汨,范尚..赤泥沉降用新型氧肟酸絮凝剂的合成与应用[J].中南大学学报（自然科学版）,2017,48(2):295-301,7.基金项目
广东省教育部产学研重大项目(2009B090200053)(Project(2009B090200053) supported by the Education Department of Guangdong Province) （2009B090200053）
