Reduction of sticky deposits by neutral deinking from recovered reduction of sticky deposits by neutral deinking from recovered paper

Producto derivado del proyecto con radicado 265B-09/14-21
In this study, the behaviour of stickies generated in the process of obtaining pulp from a mixture of recovered office paper, newspaper, and magazine paper by neutral deinking was tested. The impact of deinking under neutral conditions and how the addition of surfactants affect- ed the process were analyzed. Adhesive deposits are contaminants generated in the papermaking process from recovered fibres and are a result of the adhesives used in the previous steps of papermaking, resins from inks, resins used as adhesives for book and magazine bind- ings, and resins used to facilitate various paper uses. In this study, the elimination of adhesive deposits using fatty alcohol ethoxylate-type surfactants and fatty acid ethoxylates using a flotation deinking process under neutral conditions was tested. Results from adhesive deposit retention tests showed that these deposits decreased as surfactants were applied, obtaining 36% elimination in the best-case scenario. INTRODUCTION