阴-非双子表面活性剂用于中性脱墨研究

Application of anionic-nonionic Gemini surfactants in neutral deinking of waste paper

以干废旧报纸为研究对象,考察了自制阴-非双子(Gemini)表面活性剂的中性脱墨效果,通过正交试验确定了较佳的脱墨条件为:脱墨剂用量为干废旧报纸质量的0.8%,碎浆时间3 h,浮选时间30 min,熟化时间50 min,熟化温度50℃。比较了该表面活性剂与阴离子、非离子表面活性剂的脱墨效果,结果表明该表面活性剂的脱墨效果好于所考察的阴离子和非离子表面活性剂。同时还研究了该表面活性剂与其他表面活性剂复配的脱墨效果,结果显示复配后的表面活性剂具有较好的协同作用。

Efficacy for neutral deinking of waste recycled newspaper with laboratory prepared new anionic-nonionic Gemini surfactant was examined. Via orthogonal designed tests,the optimal operating conditions for the neutral deinking process were identified as follows： deinking agent dosage,0. 8%（ refer to mass of dry waste newspaper） ： pulping time,3 h; flotation time,30 min; curing time,50 min; curing temperature,50 ℃.The deinking efficacy of the new anionic- nonionic Gemini surfactants was compared separately with that of conventional anionic and nonionic surfactants,and the experimental results showed that the former is better.Meanwhile,the deinking efficacy of the blend of the new anionic- nonionic Gemini surfactant with other surfactants was also examined and the results showed that there is good synergistic effect between the new Gemini surfactant and other surfactants.