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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14874
Title: Studies on Deinkability Factors of old Newsprints by using different surfactants and process variables
Authors: Koshle V.K.
Bhardwaj N.K.
Mishra, Narayan Chandra
Published in: IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association
Abstract: Effects of chemical dosages and flotation time, on Deinkability Factor based on ISO Brightness and ERIC Value in the flotation deinking of old newsprints (Hindustan Times) have been studied using fatty acids and surfactants namely oleic acid, palmitic acid, stearic acid and triton x 100. From the experimental results, it is shown that 10 minutes flotation time is sufficient for ink removal. It appears that beyond 10 minutes flotation time the removal of ink is not significant. The optimum chemical dosage for oleic, palmitic and triton x 100 is 1.2% and optimum chemical dosage for stearic acid is 1.0%. The rpm of rotor of flotation cell or indirectly the air flow rate should be maximum to have maximum flotation efficiency. It is found that 2000 rpm gives maximum flotation efficiency. Consistency of flotation should be 1% to have great probability of ink particles attachment due to their high concentration. From the experimental data it is observed that Deinkability Factor increases with increase in chemical dosages up to the optimum condition. Beyond the optimum chemical dosage the agglomerate size increases to a limit, where the ink agglomerates remain back in the system, leading to lower Deinkability Factor.
Citation: IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association (2010), 22(4): 127-132
URI: http://repository.iitr.ac.in/handle/123456789/14874
Issue Date: 2010
Keywords: Deinking chemicals
Dinkability factor
ERIC
Flotation time
Ink agglomerate
Iso brightness
ONP
ISSN: 3795462
Author Scopus IDs: 37061092800
55954738000
36798999600
Author Affiliations: Koshle, V.K., Orient Paper Mill, P.O. Amlai, DistShahdol (M.P.), India
Bhardwaj, N.K., Department of Paper Technology, IIT Roorkee, Saharanpur Campus, Saharanpur 247001 (U.P), India
Mishra, N.C., Orient Paper Mill, P.O. Amlai, DistShahdol (M.P.), India, Department of Paper Technology, IIT Roorkee, Saharanpur Campus, Saharanpur 247001 (U.P), India
Corresponding Author: Koshle, V. K.; Orient Paper Mill, P.O. Amlai, DistShahdol (M.P.), India
Appears in Collections:Journal Publications [PE]

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