METHOD FOR BLEACHING CHEMICAL PAPER PULPS BY FINAL OZONE TREATMENT AT HIGH TEMPERATURE

• Main Authors: RIED, ACHIM, CHIRAT, CHRISTINE, PIPON, GUILLAUME, HOSTACHY, JEANRISTOPHE, LACHENAL, DOMINIQUE
• Format: Patent
• Language: English; French
• Published: 19.06.2008
• Subjects: APPARATUS THEREFOR; BLEACHING LEATHER OR FURS; DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS,YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; LAUNDERING; PAPER-MAKING; PRODUCTION OF CELLULOSE; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; TEXTILES; TREATMENT OF TEXTILES OR THE LIKE

Method for treating a prebleached chemical pulp comprising a step of ozone treatment of the said pulp, carried out at a temperature above 60°C, advantageously above 65°C and even more advantageously above or equal to 70°C. Procédé de traitement d'une pâte à papier pré-blanchie comprenant un traitement à l'ozone de ladite pâte effectué à une température supérieure à 60°C, de préférence à plus de 65 °C et idéalement à 70 °C ou plus.