Objectif THE OBJECTIVE OF THE PROPOSED RESEARCH CONSISTS OF THE IMPROVEMENT OF H202 PERFORMANCE AS A BLEACHING AGENT OF MECHANICAL PULPS AND AS A DELIGNIFYING AGENT OF CHEMICAL PULPS. THE RESEARCH WILL INCLUDE THE FOLLOWING POINTS : - DETERMINATION OF THE OPTIMUM BLEACHING CONDITIONS OF MECHANICAL PULPS WITH HIGH LEVELS OF PEROXIDE IN AN ALKALINE MEDIUM AT HIGH BRIGHTNESS >80% (EFFECT OF PH, REAGENT INTRODUCTION PROCEDURE, TEMPERATURE, TIME,...) - ACTIVATION OF HYDROGEN PEROXIDE BY A CHEMICAL PRETREATMENT OR ADDITIVES, - DETERMINATION OF THE OPTIMUM DELIGNIFICATION CONDITIONS OF CHEMICAL PULPS (KRAFT AND SULPHITE) WITH HYDROGEN PEROXIDE IN AN ALKALINE MEDIUM(EFFECT OF PH, REAGENT INTRODUCTION PROCEDURE, TEMPERATURE, TIME, STABILIZING AGENTS, METAL IONS...) - ACTIVATION OF HYDROGEN PEROXIDE BY A CHEMICAL PRETREATMENT (ACID TREATMENT) OF ADDITIVES, - REACTION OF HYDROGEN PEROXIDE WITH THE RESIDUAL LIGNIN OF A CHEMICAL PULP(KINETICS, FORMATIONETICS, FORMATION OF CARBOXYL GROUPS, CLEAVAGE OF LIGNIN CARBOHYDRATE LINKAGES, DEPOLYMERISATION OF LIGNIN). Programme(s) PRE-RAWMAT 2C - Research and development programme (EEC) in the raw materials sector, 1982-1985 Thème(s) Data not available Appel à propositions Data not available Régime de financement Data not available Coordinateur Centre Technique de l'Industrie des Papiers, Cartons et Celluloses Contribution de l’UE Aucune donnée Adresse Domaine Universitaire 38020 Grenoble France Voir sur la carte Coût total Aucune donnée
