Journal of Korea Technical Association of The Pulp and Paper Industry (펄프종이기술)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
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Neutral Deinking of Old Newspapers Contaminated with Flexo Ink - Evaluation of the deinking efficiency of alcohol type neutral deinking agents -

플렉소 잉크가 포함된 신문고지의 중성 탈묵 - 알코올계 계면활성제의 효과 평가 -

  • 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)
  • 류훈 (서울대학교 농업생명과학대학 산림과학부 환경재료과학) ;
  • 이학래 (서울대학교 농업생명과학대학 산림과학부 환경재료과학)
  • Published : 2006.12.30
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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

References

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