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| Synthesis of AIP-I-AIP Nonionic Surfactant and Its Application in Flotation Deinking |
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| DOI：10.11980/j.issn.0254-508X.2014.06.002 |
| Key Words:AEO-3 IPDI PEG AIP-I-AIP nonionic surfactants deinking agent |
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| Abstract:A series of nonionic surfactants were synthesized by using lauryl alcohol polyoxyethylene ether(AEO-3), isophorone diisocyanate (IPDI) and polyethylene glycol(PEG) as raw materials. The synthesis process was optimized. The chemical structures of the products were characterized by FT-IR and 1H-NMR, and the physical properties were also determined. The application of the mixed deinking agents in waste paper deinking with flotation process and the comparison between the product and commercial deinking agent were studied. The optimal synthesis condition was determined as follows: the molar ratio of lauryl alcohol polyoxyethylene ether (AEO-3) to isophorone diisocyanate (IPDI) to polyethylene glycol (PEG) to isophorone diisocyanate (IPDI) was 1∶1.5∶1, reaction at 70℃ for 2 h and the amount of the catalyst was 1.0% on the total monomers. When the deinking agents of m(AIP-I-AIP)∶m(AES)∶m(AEO-3)=1∶2∶1 and with dosage 0.2%; the brightness of the deinked pulp was 68.6% and the residual ink concentration was 41.4 mm,sup>2/m2. |
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