PROCESS FOR THE PRODUCTION OF MICROFIBRILLATED CELLULOSE FROM HIGH-YIELD KRAFT PULP, MICROFIBRILLATED CELLULOSE OBTAINABLE BY SAID PROCESS AND KRAFT PULP AND PAPER PRODUCTS COMPRISING SAID MICROFIBRILLATED CELLULOSE
The present invention relates to a process for the production of microfibrillated cellulose from a high-yield pulp, comprising the steps of selecting a Kraft pulp with a total lignin content of 5% to 30% by weight and defibering same to obtain a suspension of microfibrillated cellulose with a minimu...
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Main Authors | , , |
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Format | Patent |
Language | English French Portuguese |
Published |
28.09.2023
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Subjects | |
Online Access | Get full text |
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Summary: | The present invention relates to a process for the production of microfibrillated cellulose from a high-yield pulp, comprising the steps of selecting a Kraft pulp with a total lignin content of 5% to 30% by weight and defibering same to obtain a suspension of microfibrillated cellulose with a minimum fines content of 15% by weight. Other aspects of the present invention correspond to the microfibrillated cellulose obtainable by the process and the Kraft pulp and paper products comprising the microfibrillated cellulose. The process described allows the production of microfibrillated cellulose with lower energy consumption and the microfibrillated cellulose has increased suitability for papermaking, resulting in paper products with increased mechanical strength properties.
La présente invention concerne un procédé de production d'une cellulose microfibrillée à partir d'une pâte à haut rendement, qui comprend les étapes de sélection d'une pâte kraft présentant une teneur en lignine totale de 5 % à 30 % en poids et de sa défibration jusqu'à l'obtention d'une suspension de cellulose microfibrillée présentant une teneur minimale en fines de 15 % en poids. D'autres aspects de la présente invention concernent la cellulose microfibrillée obtenue à partir dudit procédé et la pâte kraft et des produits papetiers la comprenant. Le procédé décrit permet la production de cellulose microfibrillée avec une consommation d'énergie réduite, et la cellulose microfibrillée présente une qualité papetière supérieure, ce qui donne lieu à des produits papetiers présentant des propriétés de résistance mécanique améliorées.
A presente invenção diz respeito a um processo de produção de uma celulose microfibrilada a partir de uma pasta de alto rendimento, que compreende os passos de selecção de uma pasta Kraft com um teor de lenhina total de 5 % a 30 % em peso e da sua des fibração até à obtenção de uma suspensão de celulose microf ibrilada com um teor mínimo de finos de 15 % em peso. Outros aspetos da presente invenção correspondem à celulose microfibrilada obtida a partir do processo e a pasta Kraft e produtos papeleiros que a compreendem. O processo descrito permite a produção de celulose microfibrilada com um menor consumo de energia e a celulose microfibrilada apresenta aptidão papeleira acrescida, resultando em produtos papeleiros com propriedades de resistência mecânica acrescidas. |
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Bibliography: | Application Number: WO2023IB52806 |