C - Chemistry – Metallurgy – 08 – H
Patent
C - Chemistry, Metallurgy
08
H
C08H 8/00 (2010.01) D21B 1/02 (2006.01)
Patent
CA 2615904
The invention is directed to methods for the pretreatment of a lignocellulose-containing biomass. Pretreatment comprises the addition of calcium hydroxide and water to the biomass to form a mixture, and subjecting the mixture to relatively high temperatures for a period of time sufficient to render the biomass amenable to digestion. The pretreated biomass is digested to produce useful products such as feedstocks, fuels, and compounds including fatty acids, sugars, ketones and alcohols. Alternatively, the pretreatment process includes the addition of an oxidizing agent, selected from the group consisting of oxygen and oxygen-containing gasses, to the mixture under pressure. The invention is also directed to a method for the recovery of calcium from the pretreated biomass.
L'invention porte sur des méthodes destinées à prétraiter la biomasse contenant de la lignocellulose. Au cours du prétraitement, on ajoute de l'hydroxyde de calcium et de l'eau à la biomasse pour former un mélange et on soumet le mélange à des températures relativement élevées pendant une période de temps suffisante pour digérer la biomasse. La biomasse prétraitée est digérée pour produire des produits utiles comme de la matière première, du combustible et des composés, y compris des acides gras, des glucides, des cétones et des alcools. Autrement, le prétraitement comprend l'ajout d'un agent oxydant, choisi parmi l'oxygène et des gaz contenant de l'oxygène, à un mélange sous pression. L'invention s'applique également à une méthode permettant de récupérer le calcium de la biomasse traitée.
Davison Richard R.
Holtzapple Mark T.
Nagwani Murlidhar
Mbm Intellectual Property Law Llp
The Texas A&m University System
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