造纸专用有机硅消泡剂的改进及其应用

将矿物油、聚醚、脂肪醇、改性有机硅系列(X-1,X-2,X-3)分别对普通有机硅消泡剂进行改进,制得一种新型造纸专用有机硅消泡剂。考察了改性剂种类及其用量对消泡剂的理化性质、稳定性、消泡效果的影响。结果表明:改性剂的加入对有机硅消泡剂的理化性质影响不大;3000 r/min离心均较稳定;矿物油、聚醚、脂肪醇改性对黑液泡沫增效作用不明显,而改性有机硅系列具有显著增效作用,特别是X-2,X-3。选用X-3,5.0%的添加量为改进条件,应用效果显著。

Improvement and Application of Silicone Defoamer Specialized in Papermaking

Adding mineral oil,polyether,aliphatic alcohol and modified silicone(X-1,X-2 and X-3) to common silicone defoamer,we prepared a series of papermaking specialized silicone defoamers with new performance.The effects of types and quantity of modifying agents on the performance of defoamers,such as physicochemical properties,stability and antifoam ability were studied.The results show that adding modifying agents had few effect on silicone defoamers’ physicochemical properties and stable centrifugally homogeneity in 3000rpm,but significantly improve their antifoam ability,only 3.0% of modified silicone can double enhance the antifoam ability of defoamer to black liquor foam in comparison with the mineral oil,polyether and aliphatic alcohol modification,especially X-2 and X-3.Finally,choosing 5.0% of silicone X-3 as the optimized modified conditions,the product’s advantage is remarkable in paper mills compared with other silicone defoamers.