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FLOTATION DE-INKING OF 50% ONP/ 50% OMG RECOVERED PAPERS MIXTURES USING NONIONIC SURFACTANT, SOAP, AND SURFACTANT/SOAP BLENDS
Bioresources, 2010-11, Vol.5 (4), p.2702-2719
[Peer Reviewed Journal]
ISSN: 1930-2126 ;EISSN: 1930-2126
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Title:
FLOTATION DE-INKING OF 50% ONP/ 50% OMG RECOVERED PAPERS MIXTURES USING NONIONIC SURFACTANT, SOAP, AND SURFACTANT/SOAP BLENDS
Author:
Jeremy Allix
;
Davide Beneventi
;
Elisa Zeno
;
Patrice Nortier
Subjects:
Calcium soap
;
Flotation de-inking
;
Nonionic surfactant
;
Separation selectivity
Is Part Of:
Bioresources, 2010-11, Vol.5 (4), p.2702-2719
Description:
A laboratory flotation column equipped with Venturi aerators and an adjustable froth removal system was used to study the effect of calcium soap and a mixture of calcium soap/alkyl phenol ethoxylate surfactant on ink and fibres transfer during flotation de-inking of a 50% old newprint (ONP) / 50% old magazines (OMG) recovered papers mixture. Mass transport phenomena determining the yield of the flotation process were interpreted using model equations describing particle removal in terms of flotation, entrainment, and drainage in the froth. A decrease in the ink and mineral fillers flotation rate constant, drainage through the froth, and in fibre entrainment was observed when increasing the surfactant concentration. These trends were consistent with the typical dispersing action of the studied nonionic surfactant. An opposite effect on ink and fillers was observed when using calcium soap alone, and the increase in the flotation rate constant and drainage through the froth were consistent with the collecting and defoaming action of the calcium soap. Moreover, fibre entrainment decreased when increasing the soap concentration. The study of the surfactant/soap mixture highlighted the absence of synergy between the calcium soap and the surfactant.
Publisher:
North Carolina State University
Language:
English
Identifier:
ISSN: 1930-2126
EISSN: 1930-2126
Source:
Geneva Foundation Free Medical Journals at publisher websites
ROAD: Directory of Open Access Scholarly Resources
DOAJ Directory of Open Access Journals
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