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Deinking Processes

UST’s Manager: Benjamin FABRY

Objectives

Improve the quality of deinked pulps and reduce the production costs by optimising or adapting deinking processes and by an eco-design approach.

Competences

Deinking processes (Pulping, Screening, Cleaning, Flotation, Washing, Dispersion, Bleaching, Fractioning).
Characterisation of inks and specks, stickies, fibres (MorFi).
Consultancy and expertise: assessment of stickies, ink and bleaching on site; trials on deinking pilot; assessment of deinkability and behaviour of converting additives (glues,…); optimisation of designing deinking lines and associated unitary operations, cleaning installations; training courses.

Activity

For all types of deinked pulp productions with different sources of raw materials, obtaining the properties required for a future utilisation needs several process steps enabling (i) to suspend recovery papers, (ii) remove contaminants (ink, stickies) using all available techniques, (iii) disperse the residual contaminants and (iv) to bleach the deinked pulps. In parallel to the development of traditional processes, CTP in its domains of competence (adaptation and/or optimisation) leads activities of more innovative research such as simplifying deinking lines, upgrading papermaking waste of deinking lines or new bleaching ways. Furthermore, a number of projects link the eco-design of converted products (inks and adhesives) to the adaptation of processes.
Through all these research activities, the "Deinking processes" team aims at meeting the papermakers requirements and at providing its expertise in order to improve productivity and to diminish the production costs, to limit waste and to face new occurring issues.
 
Materials
 

• Recycled Fibres Pilot (pulpers, pressure screens, cleaner, flotation cells, washer, thickeners, slow and rapid kneading, bleaching, dissolved air flotation). More.
• Screening/Fractioning pilot (screen - slice) – Centrifuge test bed cleaner – Gyroclean.
• Deinking laboratory (pulpers, pressure screen, bleaching, flotation, washer) and associated controls including the conventional optical properties, analyses of stickies (several available methods depending on problems).