高取代度阳离子淀粉在造纸工业中的应用

通过半干法制备高取代度阳离子淀粉。将玉米原淀粉和适量的碱催化剂在三口烧瓶中混合均匀后 ,再加入 3-氯 - 2 -羟丙基三甲基氯化铵阳离子醚化剂 ,在温度为 6 0～ 70℃时 ,反应 4h ,再用乙醇溶液浸泡、过滤、洗涤、真空干燥 ,制得的高取代度阳离子淀粉具有显著的助留助滤效果 ,且用量明显减少

The Application of the Highly Substituted Cationic Starch in the Papermaking Industry

This paper deals with the preparation of the ca ti onic starch on the degree of high substitution through the half dry way. The cor n starch and the alkali catalyst are mixed in the three-mouth flask, then addin g the cationic etherfying agent N-(3 -chloro-2- hydroxypropyl) trimethylammonium chloride]. Let them react for 4 hours at the temperature of 60～70℃. Then using the ethanol to saturate, after filtering, w ashing and vacuum drying. We get the highly substituted cationic starch. The exp eriments show that this kind of cationic starch has remarkable retention effects and its dosages decrease.