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    • 7. 发明申请
    • METHOD FOR DILUTE ACID PRETREATMENT OF L1GNOCELLULOSIC FEEDSTOCKS
    • 稀土酸预处理方法
    • WO2012019305A1
    • 2012-02-16
    • PCT/CA2011/050490
    • 2011-08-11
    • IOGEN ENERGY CORPORATIONTOLAN, Jeffrey S.CARDILE, StevenWAHNON, Daphne
    • TOLAN, Jeffrey S.CARDILE, StevenWAHNON, Daphne
    • C12P19/14C08H8/00C12P19/02C13K1/02C12P7/10D21C3/00
    • C08B1/00A23V2002/00C08H8/00C12P7/10C12P2201/00C13K1/02Y02E50/16A23V2250/61
    • The present invention relates to a process for the conversion of a lignocellulosic feedstock involving acid pretreatment. The process comprises the steps of treating the lignocellulosic feedstock with alkali at a pH of between about 8.0 and about 12.0 so as to dissolve acetyl groups present on said lignocellulosic feedstock, while converting less than about 10% of the xylan present in the lignocellulosic feedstock to xylose and less than about 10% of the cellulose to glucose, thereby producing an alkali conditioned feedstock. The alkali conditioned feedstock is then pretreated at a temperature of about 160°C to about 250°C, at a pH of about 0.5 to about 2.5 for about 0.5 to about 10 minutes so as to hydrolyze about 80 to 100% of the xylan and about 3 to about 15% of the cellulose to produce an acid pretreated feedstock comprising cellulose. The cellulose in the pretreated feedstock can be hydrolyzed to glucose with cellulase and the glucose can be fermented to produce a fermentation product.
    • 本发明涉及一种涉及酸预处理的木质纤维原料的转化方法。 该方法包括以约8.0至约12.0的pH处理木质纤维素原料的步骤,以便溶解存在于所述木质纤维素原料上的乙酰基,同时将少于约10%木质纤维素原料中存在的木聚糖转化为 木糖和小于约10%的纤维素与葡萄糖,从而产生碱处理的原料。 然后将碱处理的原料在约160℃至约250℃的温度下,在约0.5至约2.5的pH下预处理约0.5至约10分钟,以水解约80至100%的木聚糖,以及 约3至约15%的纤维素以产生包含纤维素的酸预处理原料。 预处理的原料中的纤维素可以用纤维素酶水解成葡萄糖,并且葡萄糖可以被发酵以产生发酵产物。