AIP型非离子表面活性剂的制备及在废纸脱墨中的应用

Synthesis of Nonionic Surfactant and Its Deinking Performance

以月桂醇聚氧乙烯醚(AEO-3)、异佛尔酮二异氰酸酯(IPDI)和不同相对分子质量的聚乙二醇(PEG)为原料制备了一系列AIP型非离子表面活性剂。考察了最佳合成工艺,并研究了合成产物及复配产品在浮选法废纸脱墨中的应用。结果表明,使用相对分子质量400的PEG,在反应温度50℃,反应时间1.5 h,催化剂用量1.0%,n(AEO-3)∶n(IPDI)∶n(PEG-400)=1∶1∶1时制备的AIP(即AIP-400)具有较好的浮选脱墨效果;AIP-400、AEO-3和脂肪醇聚氧乙烯醚硫酸钠(AES)复配使用时的脱墨效果有进一步的提高,m(AIP-400)∶m(AES)∶m(AEO-3)=1∶2∶1,用量为0.2%时,废杂志纸脱墨后的白度为67.8%,残余油墨量为43.2 mm2/m2。

A series nonionic surfactant products were synthesized by using different molecular weight polyethylene glycol（ PEG）, lauryl alco- hol polyoxyethylene ether（AEO-3） and isophorone diisocyanate （IPDI） as raw materials, the synthesis process was optimized. The combined performance of AIP deinking agent and anionic surfactants in flotation process of waste papers was investigated. It was found that the better synthesis condition was determined as follows ： the molar ratio of lauryl alcohol polyoxyethylene ether （ AEO-3 ） to polyethylene glycol （ PEG- 400） to isophorone diisocyanate （IPDI） was 1 ： 1 ： 1 at 50℃ for 1.5 h. When m （ AIP- 400 ） ： m （AES） ： m （ AE0-3 ） = 1 ： 2 ： 1 and dosage of AIP-400 was 0.2% ; the whiteness of the deinked pulp can be reached to 67.8% and the residual ink concentration was 43.2 mm2/m2.