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Neutral Deinking of Old Newspapers Contaminated with Flexo Ink - Evaluation of the deinking efficiency of alcohol type neutral deinking agents -  

Ryu, Hoon (Program in Environmental Materials Sciences, College of Agriculture and Life Sciences, Seoul National University)
Lee, Hak-Lae (Program in Environmental Materials Sciences, College of Agriculture and Life Sciences, Seoul National University)
Publication Information
Journal of Korea Technical Association of The Pulp and Paper Industry / v.38, no.4, 2006 , pp. 31-40 More about this Journal
Abstract
Presence of old newspapers printed with waterbased flexographic inks leads to a significant loss of brightness of the deinked pulp by flotation process. It has been shown that neutral or acidic flotation deinking has many advantages in recycling of flexo printed newsprints. A comparative experimental study was performed to evaluate the deinking efficiency of three alcohol type deinking agents in flotation deinking of flexo printed newspapers. Zeta potential of neutral deinked pulp was less negative than alkaline deinked pulp. Also neutral deinking was advantages in reducing turbidity, COD, and cationic de-mands of deinking process water.
Keywords
neutral deinking; flexo ink; surfactant; ONP; flotation;
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  • Reference
1 Upton, B.H., Krishnagopalan, G.A. and Abubakr, S., Ultrafiltrative deinking of flexographic ONP: The role of surfactants, 1997 Recycling Symposium Proceedings, TAPPI PRESS, Atlanta, USA, pp. 175 - 191
2 Jarrehult, B., Horacek, R.G. and Lindquist, M. L.,Deinking of wastepaper containing flexographic inks, 1989 Pulping Conference Proceedings, TAPPI PRESS, Atlanta, USA, pp. 391 - 405
3 Galland, G., Vernac, Y. and Carre, B., The advantages of combining neutral and alkaline deinking, Part I : Comparison of deinking of offset and flexoprinted paper, Pulp Paper Canada 98(6) : T182 - 185 (1997)
4 Lee, H.L., and H. Ryu, Neutral deinking of old newsprints contaminated with flexo ink – Evaluation of the deinking efficiency of two neutral deinking agents, J. Korea TAPPI 33(1):9 - 16 (2001)
5 Upton, B.H., Krishnagopalan, G.A. and Abubakr, S., Deinking flexographic newsprint : using ultrafiltration to close the water loop, Tappi J. 80(2): 155 - 164 (1997)
6 Chabot, B., Daneault, C., Lapointe, M. and Machildon, L., Newsprint water‐based inks and flotation deinking, Progress Paper Recycling, August/ 1993 : 21 - 29
7 Skaar, T.F., Deinking flexo printed ONP in the flotation stage, 1994 Pulping Conference Proceedings, TAPPI PRESS, Atlanta, USA, pp. 885 - 904
8 Chabot, B., Daneault, C., Sain, M.M. and Dorris, G.M., The adverse role of fibres during the flotation of flexographic inks, Pulp Paper Canada 98(12) : T451 - 456 (1997)
9 Galland, G., Vernac, Y. and Carre, B., The advantages of combining neutral and alkaline deinking, Part II : Comparison of various processes for deinking mixtures containing waterbased printed paper in the CTP pilot plant, Pulp Paper Canada 98(7) : T254 - 257 (1997)
10 Turvey, R.W., Chemical use in recycling, In, Thecnology of Paper Recycling, ed. by R.W.J. McKinney, Blackie Academic & Professional, Glasgow, UK, pp. 130 - 144 (1995)
11 Jordan, B.D. and Popson, S.J., Measuring the conentration of residual ink in recycled newsprint, JPPS 20(6) : J161 - 167 (1994)