Apparatus for extraction of saccharides from lignocellulose...

C - Chemistry – Metallurgy – 22 – C

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C22C 38/40 (2006.01) C13K 1/02 (2006.01) C22C 38/44 (2006.01)

Patent

CA 2679241

The present invention relates to the use of a comparatively cheap material for the containment of at least a strongly acidic mineral acid solution highly diluted with water, by means of which saccharides are extracted from lignocellulose material by hydrolysis at a temperature of 175-240°C and a pressure of 6-34 bar (0.6-14 MPa) as well as a time of 1-60 minutes and is characterized in that the material comprises, in addition to iron in an amount greater than any other individual substance and usually at least 50 % by weight, at least chromium in an amount of 10.5-30 % by weight, nickel in an amount of 2.5-29 % by weight, and molybdenum in an amount of 0-7 % by weight. The invention also relates to an apparatus.

La présente invention concerne l'utilisation d'un matériau relativement peu coûteux pour contenir au moins une solution d'un acide minéral fortement acide diluée avec de l'eau, pour extraire des saccharides d'un matériau à base de lignocellulose par hydrolyse à une température de 175 à 240 °C, une pression de 6 à 34 bars (0,6 à 14 MPa) et en une durée de 1 à 60 minutes. Cette utilisation est caractérisée en ce que le matériau comprend, en plus du fer en une quantité supérieure à toutes les autres substances individuelles et généralement supérieure ou égale à 50 % en poids, au moins du chrome en une quantité de 10,5 à 30 % en poids, du nickel en une quantité de 2,5 à 29 % en poids et du molybdène en une quantité de 0 à 7 % en poids. L'invention concerne également un appareil.

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