羧甲基淀粉的水相合成及其浮选应用研究  

The Research on Synthesis in Aqueous Phase and Flotation Application of Carboxymethyl Starch

作　　者：宋长友[1] 

机构地区：[1]唐山学院环境与化学工程系,河北唐山063000

出　　处：《唐山学院学报》2013年第3期29-31,共3页Journal of Tangshan University

摘　　要：以一氯乙酸为醚化剂,在水相中制备了低取代度(DS)的羧甲基淀粉。在淀粉乳浓度29%,投料比n(ClCH2COOH)∶n(淀粉)=0.15∶1,反应温度50℃,反应时间10h的条件下,羧甲基淀粉的取代度为0.027 9。以此取代度的羧甲基淀粉作为抑制剂对红铁矿进行浮选实验,当用量为220g/t原矿时,精品位可达66.02%,回收率可达80.15%。Low-substituted carboxymethyl starch was prepared in aqueous phase by using C1CH2COOH as an etherifying agent. Under conditions of starch concentration of 29%, molar ratio of C1CH2COOH to starch of 0. 15： 1, reaction temperature of 50 ℃ and reaction time of 10 h, DS of carboxymethyl starch achieved 0. 027 9. Results of red iron mine flotation test with this low-substituted carboxymethyl starch as the depressor showed, when dosages of carboxymethyl starch were 220 g/t raw ore, grade of concentrate reached 66. 02%, recovery rate reached 80. 15%.

关 键 词：羧甲基淀粉 低取代度 浮选实验 抑制性能 

分 类 号：TS23[轻工技术与工程—粮食、油脂及植物蛋白工程]