Arkema France

Coatex

Jérôme Blanc

François Dupont

Francois Dupont

Markus Brandhorst

Michel Petit-Conil

Valérie Meyer

Christophe Calais

Pierre Larnicol

Valerie Meyer

A method for deinking recycled paper, including a pulping step, and then a flotation step, which includes introduction of at least one dispersant of the polyacrylate type, representing from 0.05 to 3.5 wt % of the mineral fillers of the recycled paper. A specific dispersant is used during the flotation step of the method for deinking recycled paper.

Method for deinking recycled paper

A method for producing mechanical paper pulp comprises: impregnating unprocessed wood, whereby unprocessed wood is exposed to an impregnating composition comprising at least a laccase enzyme and a formula mediator (I), wherein Rand Rare identical or different groups, chosen from among a hydrogen atom, a hydrocarbon chain, linear or branched, saturated or unsaturated, comprising 1 to 14 carbon atoms, wherein each hydrocarbon chain can be replaced by one or more functional groups chosen from among &#x2014;OH, &#x2014;SO, benzyl, amino, mercapto, keto or carboxyl, wherein Rand Rin combination can form a cyclical structure, to achieve impregnation of the wood; and mechanically refining the impregnated wood, such that a mechanical paper pulp is obtained. The disclosure also relates to an impregnating composition used in this method and to the use thereof in a method for producing mechanical paper pulp, as well as to a method for producing paper.

Enzymatic pretreatment of wood in a method for producing mechanical paper pulp

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Brignais, France

Jérôme Blanc