METHOD FOR MANUFACTURING PAPERMAKING PULP

The invention relates to a method for manufacturing papermaking pulp, including: a step of refining wood, including an ozone treatment, so as to obtain a mechanical pulp; a deacidification step including placing the mechanical pulp in contact with a deacidification composition including at least one...

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Main Authors HOSTACHY, JEANRISTOPHE, CALAIS, CHRISTOPHE
Format Patent
LanguageEnglish
French
Published 28.05.2013
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Abstract The invention relates to a method for manufacturing papermaking pulp, including: a step of refining wood, including an ozone treatment, so as to obtain a mechanical pulp; a deacidification step including placing the mechanical pulp in contact with a deacidification composition including at least one alkaline agent for more than an hour; and a bleaching step including placing the deacidified pulp in contact with a bleaching composition; wherein the pH varies by less than 0.2 points during the last 30 minutes of the deacidification step, and the pH is 6 to 10 at the end of the deacidification step. L'invention concerne un procédé de fabrication d'une pâte à papier comprenant: une étape de raffinage de bois, comprenant un traitement à l'ozone, de sorte à obtenir une pâte mécanique; une étape de désacidification comprenant la mise en contact de la pâte mécanique avec une composition de désacidification comprenant au moins un agent alcalin pendant une durée supérieure à une heure; et une étape de blanchiment comprenant la mise en contact de la pâte désacidifiée avec une composition de blanchiment; dans lequel le pH varie de moins de 0,2 unité au cours pendant les 30 dernières minutes de l'étape de désacidification, et le pH est compris entre 6 et 10 à l'issue de l'étape de désacidification.
AbstractList The invention relates to a method for manufacturing papermaking pulp, including: a step of refining wood, including an ozone treatment, so as to obtain a mechanical pulp; a deacidification step including placing the mechanical pulp in contact with a deacidification composition including at least one alkaline agent for more than an hour; and a bleaching step including placing the deacidified pulp in contact with a bleaching composition; wherein the pH varies by less than 0.2 points during the last 30 minutes of the deacidification step, and the pH is 6 to 10 at the end of the deacidification step. L'invention concerne un procédé de fabrication d'une pâte à papier comprenant: une étape de raffinage de bois, comprenant un traitement à l'ozone, de sorte à obtenir une pâte mécanique; une étape de désacidification comprenant la mise en contact de la pâte mécanique avec une composition de désacidification comprenant au moins un agent alcalin pendant une durée supérieure à une heure; et une étape de blanchiment comprenant la mise en contact de la pâte désacidifiée avec une composition de blanchiment; dans lequel le pH varie de moins de 0,2 unité au cours pendant les 30 dernières minutes de l'étape de désacidification, et le pH est compris entre 6 et 10 à l'issue de l'étape de désacidification.
Author HOSTACHY, JEANRISTOPHE
CALAIS, CHRISTOPHE
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DocumentTitleAlternate PROCEDE DE FABRICATION DE PATE A PAPIER
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RelatedCompanies ITT MANUFACTURING ENTREPRISES INC
ARKEMA FRANCE
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Snippet The invention relates to a method for manufacturing papermaking pulp, including: a step of refining wood, including an ozone treatment, so as to obtain a...
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SourceType Open Access Repository
SubjectTerms APPARATUS THEREFOR
FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
PAPER-MAKING
PRODUCTION OF CELLULOSE
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS
REGENERATION OF PULPING LIQUORS
TEXTILES
Title METHOD FOR MANUFACTURING PAPERMAKING PULP
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