D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 3/22 (2006.01) C08H 8/00 (2010.01) C08B 37/14 (2006.01) D21C 5/00 (2006.01)
Patent
CA 2448862
The invention relates to a method for separating hemicelluloses from a biomass containing hemicelluloses. Said method comprises the following steps: a) the hemicelluloses are extracted from the biomass containing hemicelluloses by means of treatment with a complex compound in an aqueous solution, forming a soluble hemicellulose complex, and b) the complexed hemicelluloses are separated from the biomass. The inventive method is especially suitable for producing high-quality chemical conversion pulp from raw cellulose. Not only does the inventive method enable the obtained products to have a high degree of purity, but it is also extremely economical and causes few emissions. The inventive method is also characterised in that polymer hemicelluloses in a pure form can be obtained as by-products.
L'invention concerne un procédé permettant de séparer des hémicelluloses d'une biomasse contenant des hémicelluloses. Ce procédé consiste a) à extraire les hémicelluloses de la biomasse contenant des hémicelluloses par un traitement avec un composé complexe dans une solution aqueuse pour obtenir un complexe soluble des hémicelluloses et b) à séparer les hémicelluloses complexées de la biomasse. Ce procédé est adapté notamment à la production d'une pâte chimique de haute valeur à partir de celluloses brutes. Non seulement ce procédé permet d'obtenir des produits d'une grande pureté mais, en plus, il est extrêmement économique et génère de faibles émissions. Ce procédé est également caractérisé en ce qu'il permet d'obtenir comme sous-produits des hémicelluloses polymères sous forme pure.
Kettenbach Gerhard
Stein Armin
Rhodia Acetow Gmbh
Robic
LandOfFree
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