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Zellsloff Fabrik Waldhof AG
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Zellsloff Fabrik Waldhof AG
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Application filed by Zellsloff Fabrik Waldhof AGfiledCriticalZellsloff Fabrik Waldhof AG
Priority to ES0199031ApriorityCriticalpatent/ES199031A1/es
Publication of ES199031A1publicationCriticalpatent/ES199031A1/es
Procedimiento para la obtención de hemicelulosa a partir de materiales brutos que contengan celulosa por ejemplo: árboles de fronda coníferas plantas anulares y otros mediante un tratamiento suave con disoluciones de cocción al bisulfito compuestas de disoluciones acuosas de SO2 y bases como por ejemplo: calcio magnesio sodio amoniaco aluminio y similares con una separación mecánica inmediata en fibras individuales caracterizado orque el ataque se efectúa adaptándolo a la materia prima celulósica y considerando las bases utilizadas con una concentración del 1 4 al 3 0% de SO2 y un pH elevado que oscila entre 3 5 y 6 a temperaturas de reacción de 115º a 140º.
ES0199031A1951-07-311951-07-31PROCEDIMIENTO PARA LA OBTENCIoN DE HEMICELULOSA
ExpiredES199031A1
(es)
Method in the manufacture of chemo-mechanical pulps by heating and defibrating in a vapour atmosphere under pressure and at increased temperature of wood chips impregnated with sulphite solution
Procédé de concentration par évaporation des lessives résiduaires, en particulier des lessives résiduaires de la fabrication de la cellulose, et des lessives analogues
Improvements relating to processes forthe treatment of cellulose and/or artificial filaments and fibres of cellulose, with fatty substances which combine stably with cellulosic substances
Improvements relating to processes forthe treatment of cellulose and/or artificial filaments and fibres of cellulose, with fatty substances which combine stably with cellulosic substances
Procédé pour obtenir des hydrolysats présentant un degré de pureté amélioré à partir de matières premières végétales cellulosiques, notamment de plantes annuelles